drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1 | /* |
drh | b19a2bc | 2001-09-16 00:13:26 +0000 | [diff] [blame] | 2 | ** 2001 September 15 |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 3 | ** |
drh | b19a2bc | 2001-09-16 00:13:26 +0000 | [diff] [blame] | 4 | ** The author disclaims copyright to this source code. In place of |
| 5 | ** a legal notice, here is a blessing: |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 6 | ** |
drh | b19a2bc | 2001-09-16 00:13:26 +0000 | [diff] [blame] | 7 | ** May you do good and not evil. |
| 8 | ** May you find forgiveness for yourself and forgive others. |
| 9 | ** May you share freely, never taking more than you give. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 10 | ** |
| 11 | ************************************************************************* |
| 12 | ** Internal interface definitions for SQLite. |
| 13 | ** |
drh | 22d6a53 | 2005-09-19 21:05:48 +0000 | [diff] [blame] | 14 | ** @(#) $Id: sqliteInt.h,v 1.421 2005/09/19 21:05:49 drh Exp $ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 15 | */ |
danielk1977 | e302663 | 2004-06-22 11:29:02 +0000 | [diff] [blame] | 16 | #ifndef _SQLITEINT_H_ |
| 17 | #define _SQLITEINT_H_ |
| 18 | |
drh | eb20625 | 2004-10-01 02:00:31 +0000 | [diff] [blame] | 19 | /* |
drh | 4b529d9 | 2005-09-13 00:00:00 +0000 | [diff] [blame] | 20 | ** Many people are failing to set -DNDEBUG=1 when compiling SQLite. |
drh | b27795c | 2005-09-13 00:02:16 +0000 | [diff] [blame] | 21 | ** Setting NDEBUG makes the code smaller and run faster. So the following |
drh | 4b529d9 | 2005-09-13 00:00:00 +0000 | [diff] [blame] | 22 | ** lines are added to automatically set NDEBUG unless the -DSQLITE_DEBUG=1 |
| 23 | ** option is set. Thus NDEBUG becomes an opt-in rather than an opt-out |
| 24 | ** feature. |
| 25 | */ |
drh | 289ab07 | 2005-09-13 16:12:47 +0000 | [diff] [blame] | 26 | #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) |
drh | 4b529d9 | 2005-09-13 00:00:00 +0000 | [diff] [blame] | 27 | # define NDEBUG 1 |
| 28 | #endif |
| 29 | |
| 30 | /* |
drh | eb20625 | 2004-10-01 02:00:31 +0000 | [diff] [blame] | 31 | ** These #defines should enable >2GB file support on Posix if the |
| 32 | ** underlying operating system supports it. If the OS lacks |
| 33 | ** large file support, or if the OS is windows, these should be no-ops. |
| 34 | ** |
| 35 | ** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch |
| 36 | ** on the compiler command line. This is necessary if you are compiling |
| 37 | ** on a recent machine (ex: RedHat 7.2) but you want your code to work |
| 38 | ** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2 |
| 39 | ** without this option, LFS is enable. But LFS does not exist in the kernel |
| 40 | ** in RedHat 6.0, so the code won't work. Hence, for maximum binary |
| 41 | ** portability you should omit LFS. |
| 42 | ** |
| 43 | ** Similar is true for MacOS. LFS is only supported on MacOS 9 and later. |
| 44 | */ |
| 45 | #ifndef SQLITE_DISABLE_LFS |
| 46 | # define _LARGE_FILE 1 |
| 47 | # ifndef _FILE_OFFSET_BITS |
| 48 | # define _FILE_OFFSET_BITS 64 |
| 49 | # endif |
| 50 | # define _LARGEFILE_SOURCE 1 |
| 51 | #endif |
| 52 | |
drh | 1d482dd | 2004-05-31 18:23:07 +0000 | [diff] [blame] | 53 | #include "sqlite3.h" |
drh | beae319 | 2001-09-22 18:12:08 +0000 | [diff] [blame] | 54 | #include "hash.h" |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 55 | #include "parse.h" |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 56 | #include <stdio.h> |
| 57 | #include <stdlib.h> |
| 58 | #include <string.h> |
| 59 | #include <assert.h> |
drh | 52370e2 | 2005-01-21 21:31:40 +0000 | [diff] [blame] | 60 | #include <stddef.h> |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 61 | |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 62 | /* |
drh | a1b351a | 2001-09-14 16:42:12 +0000 | [diff] [blame] | 63 | ** The maximum number of in-memory pages to use for the main database |
danielk1977 | 24c8ab8 | 2005-02-09 01:40:23 +0000 | [diff] [blame] | 64 | ** table and for temporary tables. Internally, the MAX_PAGES and |
| 65 | ** TEMP_PAGES macros are used. To override the default values at |
| 66 | ** compilation time, the SQLITE_DEFAULT_CACHE_SIZE and |
| 67 | ** SQLITE_DEFAULT_TEMP_CACHE_SIZE macros should be set. |
drh | a1b351a | 2001-09-14 16:42:12 +0000 | [diff] [blame] | 68 | */ |
drh | 1ba1e6e | 2005-01-21 21:22:52 +0000 | [diff] [blame] | 69 | #ifdef SQLITE_DEFAULT_CACHE_SIZE |
| 70 | # define MAX_PAGES SQLITE_DEFAULT_CACHE_SIZE |
| 71 | #else |
| 72 | # define MAX_PAGES 2000 |
| 73 | #endif |
danielk1977 | 24c8ab8 | 2005-02-09 01:40:23 +0000 | [diff] [blame] | 74 | #ifdef SQLITE_DEFAULT_TEMP_CACHE_SIZE |
| 75 | # define TEMP_PAGES SQLITE_DEFAULT_TEMP_CACHE_SIZE |
| 76 | #else |
| 77 | # define TEMP_PAGES 500 |
| 78 | #endif |
drh | a1b351a | 2001-09-14 16:42:12 +0000 | [diff] [blame] | 79 | |
| 80 | /* |
danielk1977 | 53c0f74 | 2005-03-29 03:10:59 +0000 | [diff] [blame] | 81 | ** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0 |
| 82 | ** afterward. Having this macro allows us to cause the C compiler |
| 83 | ** to omit code used by TEMP tables without messy #ifndef statements. |
| 84 | */ |
| 85 | #ifdef SQLITE_OMIT_TEMPDB |
| 86 | #define OMIT_TEMPDB 1 |
| 87 | #else |
| 88 | #define OMIT_TEMPDB 0 |
| 89 | #endif |
| 90 | |
| 91 | /* |
drh | 0bd1f4e | 2002-06-06 18:54:39 +0000 | [diff] [blame] | 92 | ** If the following macro is set to 1, then NULL values are considered |
| 93 | ** distinct for the SELECT DISTINCT statement and for UNION or EXCEPT |
| 94 | ** compound queries. No other SQL database engine (among those tested) |
| 95 | ** works this way except for OCELOT. But the SQL92 spec implies that |
| 96 | ** this is how things should work. |
| 97 | ** |
| 98 | ** If the following macro is set to 0, then NULLs are indistinct for |
| 99 | ** SELECT DISTINCT and for UNION. |
| 100 | */ |
| 101 | #define NULL_ALWAYS_DISTINCT 0 |
| 102 | |
| 103 | /* |
| 104 | ** If the following macro is set to 1, then NULL values are considered |
| 105 | ** distinct when determining whether or not two entries are the same |
| 106 | ** in a UNIQUE index. This is the way PostgreSQL, Oracle, DB2, MySQL, |
| 107 | ** OCELOT, and Firebird all work. The SQL92 spec explicitly says this |
| 108 | ** is the way things are suppose to work. |
| 109 | ** |
| 110 | ** If the following macro is set to 0, the NULLs are indistinct for |
| 111 | ** a UNIQUE index. In this mode, you can only have a single NULL entry |
| 112 | ** for a column declared UNIQUE. This is the way Informix and SQL Server |
| 113 | ** work. |
| 114 | */ |
| 115 | #define NULL_DISTINCT_FOR_UNIQUE 1 |
| 116 | |
| 117 | /* |
drh | 665de47 | 2003-03-31 13:36:09 +0000 | [diff] [blame] | 118 | ** The maximum number of attached databases. This must be at least 2 |
| 119 | ** in order to support the main database file (0) and the file used to |
drh | 8024205 | 2004-06-09 00:48:12 +0000 | [diff] [blame] | 120 | ** hold temporary tables (1). And it must be less than 32 because |
| 121 | ** we use a bitmask of databases with a u32 in places (for example |
| 122 | ** the Parse.cookieMask field). |
drh | 665de47 | 2003-03-31 13:36:09 +0000 | [diff] [blame] | 123 | */ |
| 124 | #define MAX_ATTACHED 10 |
| 125 | |
| 126 | /* |
drh | fa6bc00 | 2004-09-07 16:19:52 +0000 | [diff] [blame] | 127 | ** The maximum value of a ?nnn wildcard that the parser will accept. |
| 128 | */ |
| 129 | #define SQLITE_MAX_VARIABLE_NUMBER 999 |
| 130 | |
| 131 | /* |
drh | 13bff81 | 2003-04-15 01:19:47 +0000 | [diff] [blame] | 132 | ** When building SQLite for embedded systems where memory is scarce, |
| 133 | ** you can define one or more of the following macros to omit extra |
| 134 | ** features of the library and thus keep the size of the library to |
| 135 | ** a minimum. |
| 136 | */ |
| 137 | /* #define SQLITE_OMIT_AUTHORIZATION 1 */ |
danielk1977 | 3e8c37e | 2005-01-21 03:12:14 +0000 | [diff] [blame] | 138 | /* #define SQLITE_OMIT_MEMORYDB 1 */ |
drh | 13bff81 | 2003-04-15 01:19:47 +0000 | [diff] [blame] | 139 | /* #define SQLITE_OMIT_VACUUM 1 */ |
drh | 0a5294b | 2003-11-11 23:30:35 +0000 | [diff] [blame] | 140 | /* #define SQLITE_OMIT_DATETIME_FUNCS 1 */ |
danielk1977 | 348bb5d | 2003-10-18 09:37:26 +0000 | [diff] [blame] | 141 | /* #define SQLITE_OMIT_PROGRESS_CALLBACK 1 */ |
danielk1977 | 45901d6 | 2004-11-10 15:27:38 +0000 | [diff] [blame] | 142 | /* #define SQLITE_OMIT_AUTOVACUUM */ |
danielk1977 | 9fd2a9a | 2004-11-12 13:42:30 +0000 | [diff] [blame] | 143 | /* #define SQLITE_OMIT_ALTERTABLE */ |
drh | 13bff81 | 2003-04-15 01:19:47 +0000 | [diff] [blame] | 144 | |
| 145 | /* |
drh | 49766d6 | 2005-01-08 18:42:28 +0000 | [diff] [blame] | 146 | ** Provide a default value for TEMP_STORE in case it is not specified |
| 147 | ** on the command-line |
| 148 | */ |
| 149 | #ifndef TEMP_STORE |
| 150 | # define TEMP_STORE 1 |
| 151 | #endif |
| 152 | |
| 153 | /* |
drh | f197484 | 2004-11-05 03:56:00 +0000 | [diff] [blame] | 154 | ** GCC does not define the offsetof() macro so we'll have to do it |
| 155 | ** ourselves. |
| 156 | */ |
| 157 | #ifndef offsetof |
| 158 | #define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD)) |
| 159 | #endif |
| 160 | |
| 161 | /* |
drh | 5a2c2c2 | 2001-11-21 02:21:11 +0000 | [diff] [blame] | 162 | ** Integers of known sizes. These typedefs might change for architectures |
| 163 | ** where the sizes very. Preprocessor macros are available so that the |
| 164 | ** types can be conveniently redefined at compile-type. Like this: |
| 165 | ** |
| 166 | ** cc '-DUINTPTR_TYPE=long long int' ... |
drh | 41a2b48 | 2001-01-20 19:52:49 +0000 | [diff] [blame] | 167 | */ |
drh | 3aac2dd | 2004-04-26 14:10:20 +0000 | [diff] [blame] | 168 | #ifndef UINT64_TYPE |
drh | efad999 | 2004-06-22 12:13:55 +0000 | [diff] [blame] | 169 | # if defined(_MSC_VER) || defined(__BORLANDC__) |
| 170 | # define UINT64_TYPE unsigned __int64 |
| 171 | # else |
| 172 | # define UINT64_TYPE unsigned long long int |
| 173 | # endif |
drh | 3aac2dd | 2004-04-26 14:10:20 +0000 | [diff] [blame] | 174 | #endif |
drh | 5a2c2c2 | 2001-11-21 02:21:11 +0000 | [diff] [blame] | 175 | #ifndef UINT32_TYPE |
| 176 | # define UINT32_TYPE unsigned int |
| 177 | #endif |
| 178 | #ifndef UINT16_TYPE |
| 179 | # define UINT16_TYPE unsigned short int |
| 180 | #endif |
drh | 939a16d | 2004-07-15 13:37:22 +0000 | [diff] [blame] | 181 | #ifndef INT16_TYPE |
| 182 | # define INT16_TYPE short int |
| 183 | #endif |
drh | 5a2c2c2 | 2001-11-21 02:21:11 +0000 | [diff] [blame] | 184 | #ifndef UINT8_TYPE |
| 185 | # define UINT8_TYPE unsigned char |
| 186 | #endif |
drh | 905793e | 2004-02-21 13:31:09 +0000 | [diff] [blame] | 187 | #ifndef INT8_TYPE |
| 188 | # define INT8_TYPE signed char |
| 189 | #endif |
drh | efad999 | 2004-06-22 12:13:55 +0000 | [diff] [blame] | 190 | #ifndef LONGDOUBLE_TYPE |
| 191 | # define LONGDOUBLE_TYPE long double |
| 192 | #endif |
drh | efad999 | 2004-06-22 12:13:55 +0000 | [diff] [blame] | 193 | typedef sqlite_int64 i64; /* 8-byte signed integer */ |
drh | 3aac2dd | 2004-04-26 14:10:20 +0000 | [diff] [blame] | 194 | typedef UINT64_TYPE u64; /* 8-byte unsigned integer */ |
drh | 5a2c2c2 | 2001-11-21 02:21:11 +0000 | [diff] [blame] | 195 | typedef UINT32_TYPE u32; /* 4-byte unsigned integer */ |
| 196 | typedef UINT16_TYPE u16; /* 2-byte unsigned integer */ |
drh | 939a16d | 2004-07-15 13:37:22 +0000 | [diff] [blame] | 197 | typedef INT16_TYPE i16; /* 2-byte signed integer */ |
drh | 5a2c2c2 | 2001-11-21 02:21:11 +0000 | [diff] [blame] | 198 | typedef UINT8_TYPE u8; /* 1-byte unsigned integer */ |
drh | 905793e | 2004-02-21 13:31:09 +0000 | [diff] [blame] | 199 | typedef UINT8_TYPE i8; /* 1-byte signed integer */ |
drh | 5a2c2c2 | 2001-11-21 02:21:11 +0000 | [diff] [blame] | 200 | |
| 201 | /* |
drh | bbd42a6 | 2004-05-22 17:41:58 +0000 | [diff] [blame] | 202 | ** Macros to determine whether the machine is big or little endian, |
| 203 | ** evaluated at runtime. |
| 204 | */ |
| 205 | extern const int sqlite3one; |
drh | 9c05483 | 2004-05-31 18:51:57 +0000 | [diff] [blame] | 206 | #define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0) |
| 207 | #define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1) |
drh | bbd42a6 | 2004-05-22 17:41:58 +0000 | [diff] [blame] | 208 | |
| 209 | /* |
drh | 90f5ecb | 2004-07-22 01:19:35 +0000 | [diff] [blame] | 210 | ** An instance of the following structure is used to store the busy-handler |
| 211 | ** callback for a given sqlite handle. |
| 212 | ** |
| 213 | ** The sqlite.busyHandler member of the sqlite struct contains the busy |
| 214 | ** callback for the database handle. Each pager opened via the sqlite |
| 215 | ** handle is passed a pointer to sqlite.busyHandler. The busy-handler |
| 216 | ** callback is currently invoked only from within pager.c. |
| 217 | */ |
| 218 | typedef struct BusyHandler BusyHandler; |
| 219 | struct BusyHandler { |
| 220 | int (*xFunc)(void *,int); /* The busy callback */ |
| 221 | void *pArg; /* First arg to busy callback */ |
drh | a4afb65 | 2005-07-09 02:16:02 +0000 | [diff] [blame] | 222 | int nBusy; /* Incremented with each busy call */ |
drh | 90f5ecb | 2004-07-22 01:19:35 +0000 | [diff] [blame] | 223 | }; |
| 224 | |
| 225 | /* |
| 226 | ** Defer sourcing vdbe.h and btree.h until after the "u8" and |
| 227 | ** "BusyHandler typedefs. |
drh | 905793e | 2004-02-21 13:31:09 +0000 | [diff] [blame] | 228 | */ |
| 229 | #include "vdbe.h" |
drh | 3aac2dd | 2004-04-26 14:10:20 +0000 | [diff] [blame] | 230 | #include "btree.h" |
drh | 905793e | 2004-02-21 13:31:09 +0000 | [diff] [blame] | 231 | |
| 232 | /* |
drh | 5a2c2c2 | 2001-11-21 02:21:11 +0000 | [diff] [blame] | 233 | ** This macro casts a pointer to an integer. Useful for doing |
| 234 | ** pointer arithmetic. |
| 235 | */ |
| 236 | #define Addr(X) ((uptr)X) |
drh | 41a2b48 | 2001-01-20 19:52:49 +0000 | [diff] [blame] | 237 | |
| 238 | /* |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 239 | ** If memory allocation problems are found, recompile with |
| 240 | ** |
drh | faa57ac | 2004-06-09 14:01:51 +0000 | [diff] [blame] | 241 | ** -DSQLITE_DEBUG=1 |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 242 | ** |
| 243 | ** to enable some sanity checking on malloc() and free(). To |
| 244 | ** check for memory leaks, recompile with |
| 245 | ** |
drh | faa57ac | 2004-06-09 14:01:51 +0000 | [diff] [blame] | 246 | ** -DSQLITE_DEBUG=2 |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 247 | ** |
| 248 | ** and a line of text will be written to standard error for |
| 249 | ** each malloc() and free(). This output can be analyzed |
| 250 | ** by an AWK script to determine if there are any leaks. |
| 251 | */ |
danielk1977 | 2c33654 | 2005-01-13 02:14:23 +0000 | [diff] [blame] | 252 | #ifdef SQLITE_MEMDEBUG |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 253 | # define sqliteMalloc(X) sqlite3Malloc_(X,1,__FILE__,__LINE__) |
| 254 | # define sqliteMallocRaw(X) sqlite3Malloc_(X,0,__FILE__,__LINE__) |
| 255 | # define sqliteFree(X) sqlite3Free_(X,__FILE__,__LINE__) |
| 256 | # define sqliteRealloc(X,Y) sqlite3Realloc_(X,Y,__FILE__,__LINE__) |
| 257 | # define sqliteStrDup(X) sqlite3StrDup_(X,__FILE__,__LINE__) |
| 258 | # define sqliteStrNDup(X,Y) sqlite3StrNDup_(X,Y,__FILE__,__LINE__) |
drh | c3c2fc9 | 2000-05-31 22:58:39 +0000 | [diff] [blame] | 259 | #else |
drh | 38f8271 | 2004-06-18 17:10:16 +0000 | [diff] [blame] | 260 | # define sqliteFree sqlite3FreeX |
| 261 | # define sqliteMalloc sqlite3Malloc |
| 262 | # define sqliteMallocRaw sqlite3MallocRaw |
| 263 | # define sqliteRealloc sqlite3Realloc |
drh | ae29ffb | 2004-09-25 14:39:18 +0000 | [diff] [blame] | 264 | # define sqliteStrDup sqlite3StrDup |
| 265 | # define sqliteStrNDup sqlite3StrNDup |
drh | dcc581c | 2000-05-30 13:44:19 +0000 | [diff] [blame] | 266 | #endif |
| 267 | |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 268 | /* |
drh | daffd0e | 2001-04-11 14:28:42 +0000 | [diff] [blame] | 269 | ** This variable gets set if malloc() ever fails. After it gets set, |
| 270 | ** the SQLite library shuts down permanently. |
| 271 | */ |
danielk1977 | 6f8a503 | 2004-05-10 10:34:51 +0000 | [diff] [blame] | 272 | extern int sqlite3_malloc_failed; |
drh | daffd0e | 2001-04-11 14:28:42 +0000 | [diff] [blame] | 273 | |
| 274 | /* |
drh | 6e142f5 | 2000-06-08 13:36:40 +0000 | [diff] [blame] | 275 | ** The following global variables are used for testing and debugging |
drh | faa57ac | 2004-06-09 14:01:51 +0000 | [diff] [blame] | 276 | ** only. They only work if SQLITE_DEBUG is defined. |
drh | 6e142f5 | 2000-06-08 13:36:40 +0000 | [diff] [blame] | 277 | */ |
danielk1977 | 2c33654 | 2005-01-13 02:14:23 +0000 | [diff] [blame] | 278 | #ifdef SQLITE_MEMDEBUG |
drh | 4693423 | 2004-11-20 19:18:00 +0000 | [diff] [blame] | 279 | extern int sqlite3_nMalloc; /* Number of sqliteMalloc() calls */ |
| 280 | extern int sqlite3_nFree; /* Number of sqliteFree() calls */ |
| 281 | extern int sqlite3_iMallocFail; /* Fail sqliteMalloc() after this many calls */ |
| 282 | extern int sqlite3_iMallocReset; /* Set iMallocFail to this when it reaches 0 */ |
drh | 6e142f5 | 2000-06-08 13:36:40 +0000 | [diff] [blame] | 283 | #endif |
| 284 | |
| 285 | /* |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 286 | ** Name of the master database table. The master database table |
| 287 | ** is a special table that holds the names and attributes of all |
| 288 | ** user tables and indices. |
| 289 | */ |
drh | e0bc404 | 2002-06-25 01:09:11 +0000 | [diff] [blame] | 290 | #define MASTER_NAME "sqlite_master" |
| 291 | #define TEMP_MASTER_NAME "sqlite_temp_master" |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 292 | |
| 293 | /* |
danielk1977 | 8e15081 | 2004-05-10 01:17:37 +0000 | [diff] [blame] | 294 | ** The root-page of the master database table. |
| 295 | */ |
| 296 | #define MASTER_ROOT 1 |
| 297 | |
| 298 | /* |
drh | ed6c867 | 2003-01-12 18:02:16 +0000 | [diff] [blame] | 299 | ** The name of the schema table. |
| 300 | */ |
danielk1977 | 53c0f74 | 2005-03-29 03:10:59 +0000 | [diff] [blame] | 301 | #define SCHEMA_TABLE(x) ((!OMIT_TEMPDB)&&(x==1)?TEMP_MASTER_NAME:MASTER_NAME) |
drh | ed6c867 | 2003-01-12 18:02:16 +0000 | [diff] [blame] | 302 | |
| 303 | /* |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 304 | ** A convenience macro that returns the number of elements in |
| 305 | ** an array. |
| 306 | */ |
| 307 | #define ArraySize(X) (sizeof(X)/sizeof(X[0])) |
| 308 | |
| 309 | /* |
| 310 | ** Forward references to structures |
| 311 | */ |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 312 | typedef struct AggInfo AggInfo; |
drh | fe05af8 | 2005-07-21 03:14:59 +0000 | [diff] [blame] | 313 | typedef struct AuthContext AuthContext; |
| 314 | typedef struct CollSeq CollSeq; |
drh | 7020f65 | 2000-06-03 18:06:52 +0000 | [diff] [blame] | 315 | typedef struct Column Column; |
drh | fe05af8 | 2005-07-21 03:14:59 +0000 | [diff] [blame] | 316 | typedef struct Db Db; |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 317 | typedef struct Expr Expr; |
| 318 | typedef struct ExprList ExprList; |
drh | c2eef3b | 2002-08-31 18:53:06 +0000 | [diff] [blame] | 319 | typedef struct FKey FKey; |
drh | fe05af8 | 2005-07-21 03:14:59 +0000 | [diff] [blame] | 320 | typedef struct FuncDef FuncDef; |
| 321 | typedef struct IdList IdList; |
| 322 | typedef struct Index Index; |
danielk1977 | 8d05984 | 2004-05-12 11:24:02 +0000 | [diff] [blame] | 323 | typedef struct KeyClass KeyClass; |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 324 | typedef struct KeyInfo KeyInfo; |
drh | 626a879 | 2005-01-17 22:08:19 +0000 | [diff] [blame] | 325 | typedef struct NameContext NameContext; |
drh | fe05af8 | 2005-07-21 03:14:59 +0000 | [diff] [blame] | 326 | typedef struct Parse Parse; |
| 327 | typedef struct Select Select; |
| 328 | typedef struct SrcList SrcList; |
| 329 | typedef struct Table Table; |
| 330 | typedef struct Token Token; |
| 331 | typedef struct TriggerStack TriggerStack; |
| 332 | typedef struct TriggerStep TriggerStep; |
| 333 | typedef struct Trigger Trigger; |
drh | fe05af8 | 2005-07-21 03:14:59 +0000 | [diff] [blame] | 334 | typedef struct WhereInfo WhereInfo; |
| 335 | typedef struct WhereLevel WhereLevel; |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 336 | |
drh | 001bbcb | 2003-03-19 03:14:00 +0000 | [diff] [blame] | 337 | /* |
| 338 | ** Each database file to be accessed by the system is an instance |
| 339 | ** of the following structure. There are normally two of these structures |
| 340 | ** in the sqlite.aDb[] array. aDb[0] is the main database file and |
drh | a69d916 | 2003-04-17 22:57:53 +0000 | [diff] [blame] | 341 | ** aDb[1] is the database file used to hold temporary tables. Additional |
| 342 | ** databases may be attached. |
drh | 001bbcb | 2003-03-19 03:14:00 +0000 | [diff] [blame] | 343 | */ |
| 344 | struct Db { |
| 345 | char *zName; /* Name of this database */ |
| 346 | Btree *pBt; /* The B*Tree structure for this database file */ |
| 347 | int schema_cookie; /* Database schema version number for this file */ |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 348 | Hash tblHash; /* All tables indexed by name */ |
| 349 | Hash idxHash; /* All (named) indices indexed by name */ |
| 350 | Hash trigHash; /* All triggers indexed by name */ |
| 351 | Hash aFKey; /* Foreign keys indexed by to-table */ |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 352 | u16 flags; /* Flags associated with this database */ |
drh | 90f5ecb | 2004-07-22 01:19:35 +0000 | [diff] [blame] | 353 | u8 inTrans; /* 0: not writable. 1: Transaction. 2: Checkpoint */ |
danielk1977 | 91cf71b | 2004-06-26 06:37:06 +0000 | [diff] [blame] | 354 | u8 safety_level; /* How aggressive at synching data to disk */ |
| 355 | int cache_size; /* Number of pages to use in the cache */ |
drh | 4794f73 | 2004-11-05 17:17:50 +0000 | [diff] [blame] | 356 | Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */ |
| 357 | void *pAux; /* Auxiliary data. Usually NULL */ |
drh | 4d189ca | 2004-02-12 18:46:38 +0000 | [diff] [blame] | 358 | void (*xFreeAux)(void*); /* Routine to free pAux */ |
drh | 001bbcb | 2003-03-19 03:14:00 +0000 | [diff] [blame] | 359 | }; |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 360 | |
| 361 | /* |
drh | 8bf8dc9 | 2003-05-17 17:35:10 +0000 | [diff] [blame] | 362 | ** These macros can be used to test, set, or clear bits in the |
| 363 | ** Db.flags field. |
| 364 | */ |
| 365 | #define DbHasProperty(D,I,P) (((D)->aDb[I].flags&(P))==(P)) |
| 366 | #define DbHasAnyProperty(D,I,P) (((D)->aDb[I].flags&(P))!=0) |
| 367 | #define DbSetProperty(D,I,P) (D)->aDb[I].flags|=(P) |
| 368 | #define DbClearProperty(D,I,P) (D)->aDb[I].flags&=~(P) |
| 369 | |
| 370 | /* |
| 371 | ** Allowed values for the DB.flags field. |
| 372 | ** |
drh | 8bf8dc9 | 2003-05-17 17:35:10 +0000 | [diff] [blame] | 373 | ** The DB_SchemaLoaded flag is set after the database schema has been |
| 374 | ** read into internal hash tables. |
| 375 | ** |
| 376 | ** DB_UnresetViews means that one or more views have column names that |
| 377 | ** have been filled out. If the schema changes, these column names might |
| 378 | ** changes and so the view will need to be reset. |
| 379 | */ |
drh | 124b27e | 2004-06-19 16:06:10 +0000 | [diff] [blame] | 380 | #define DB_SchemaLoaded 0x0001 /* The schema has been loaded */ |
| 381 | #define DB_UnresetViews 0x0002 /* Some views have defined column names */ |
drh | 8bf8dc9 | 2003-05-17 17:35:10 +0000 | [diff] [blame] | 382 | |
danielk1977 | dc8453f | 2004-06-12 00:42:34 +0000 | [diff] [blame] | 383 | #define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE) |
drh | 8bf8dc9 | 2003-05-17 17:35:10 +0000 | [diff] [blame] | 384 | |
| 385 | /* |
drh | c9b84a1 | 2002-06-20 11:36:48 +0000 | [diff] [blame] | 386 | ** Each database is an instance of the following structure. |
| 387 | ** |
rdc | b0c374f | 2004-02-20 22:53:38 +0000 | [diff] [blame] | 388 | ** The sqlite.lastRowid records the last insert rowid generated by an |
| 389 | ** insert statement. Inserts on views do not affect its value. Each |
| 390 | ** trigger has its own context, so that lastRowid can be updated inside |
| 391 | ** triggers as usual. The previous value will be restored once the trigger |
| 392 | ** exits. Upon entering a before or instead of trigger, lastRowid is no |
| 393 | ** longer (since after version 2.8.12) reset to -1. |
| 394 | ** |
| 395 | ** The sqlite.nChange does not count changes within triggers and keeps no |
danielk1977 | 6f8a503 | 2004-05-10 10:34:51 +0000 | [diff] [blame] | 396 | ** context. It is reset at start of sqlite3_exec. |
rdc | b0c374f | 2004-02-20 22:53:38 +0000 | [diff] [blame] | 397 | ** The sqlite.lsChange represents the number of changes made by the last |
| 398 | ** insert, update, or delete statement. It remains constant throughout the |
| 399 | ** length of a statement and is then updated by OP_SetCounts. It keeps a |
| 400 | ** context stack just like lastRowid so that the count of changes |
| 401 | ** within a trigger is not seen outside the trigger. Changes to views do not |
| 402 | ** affect the value of lsChange. |
| 403 | ** The sqlite.csChange keeps track of the number of current changes (since |
| 404 | ** the last statement) and is used to update sqlite_lsChange. |
danielk1977 | 6622cce | 2004-05-20 11:00:52 +0000 | [diff] [blame] | 405 | ** |
| 406 | ** The member variables sqlite.errCode, sqlite.zErrMsg and sqlite.zErrMsg16 |
| 407 | ** store the most recent error code and, if applicable, string. The |
| 408 | ** internal function sqlite3Error() is used to set these variables |
| 409 | ** consistently. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 410 | */ |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 411 | struct sqlite3 { |
drh | 001bbcb | 2003-03-19 03:14:00 +0000 | [diff] [blame] | 412 | int nDb; /* Number of backends currently in use */ |
| 413 | Db *aDb; /* All backends */ |
drh | 5e00f6c | 2001-09-13 13:46:56 +0000 | [diff] [blame] | 414 | int flags; /* Miscellanous flags. See below */ |
drh | fcd35c7 | 2005-05-21 02:48:08 +0000 | [diff] [blame] | 415 | int errCode; /* Most recent error code (SQLITE_*) */ |
| 416 | u8 enc; /* Text encoding for this database. */ |
| 417 | u8 autoCommit; /* The auto-commit flag. */ |
drh | 973b6e3 | 2003-02-12 14:09:42 +0000 | [diff] [blame] | 418 | u8 file_format; /* What file format version is this database? */ |
drh | 90f5ecb | 2004-07-22 01:19:35 +0000 | [diff] [blame] | 419 | u8 temp_store; /* 1: file 2: memory 0: default */ |
drh | 5e00f6c | 2001-09-13 13:46:56 +0000 | [diff] [blame] | 420 | int nTable; /* Number of tables in the database */ |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 421 | CollSeq *pDfltColl; /* The default collating sequence (BINARY) */ |
drh | f328bc8 | 2004-05-10 23:29:49 +0000 | [diff] [blame] | 422 | i64 lastRowid; /* ROWID of most recent insert (see above) */ |
| 423 | i64 priorNewRowid; /* Last randomly generated ROWID */ |
drh | 247be43 | 2002-05-10 05:44:55 +0000 | [diff] [blame] | 424 | int magic; /* Magic number for detect library misuse */ |
danielk1977 | b28af71 | 2004-06-21 06:50:26 +0000 | [diff] [blame] | 425 | int nChange; /* Value returned by sqlite3_changes() */ |
| 426 | int nTotalChange; /* Value returned by sqlite3_total_changes() */ |
| 427 | struct sqlite3InitInfo { /* Information used during initialization */ |
| 428 | int iDb; /* When back is being initialized */ |
| 429 | int newTnum; /* Rootpage of table being initialized */ |
| 430 | u8 busy; /* TRUE if currently initializing */ |
drh | 1d85d93 | 2004-02-14 23:05:52 +0000 | [diff] [blame] | 431 | } init; |
drh | 326dce7 | 2003-01-29 14:06:07 +0000 | [diff] [blame] | 432 | struct Vdbe *pVdbe; /* List of active virtual machines */ |
danielk1977 | 1d850a7 | 2004-05-31 08:26:49 +0000 | [diff] [blame] | 433 | int activeVdbeCnt; /* Number of vdbes currently executing */ |
drh | 19e2d37 | 2005-08-29 23:00:03 +0000 | [diff] [blame] | 434 | void (*xTrace)(void*,const char*); /* Trace function */ |
| 435 | void *pTraceArg; /* Argument to the trace function */ |
| 436 | void (*xProfile)(void*,const char*,u64); /* Profiling function */ |
| 437 | void *pProfileArg; /* Argument to profile function */ |
drh | fcd35c7 | 2005-05-21 02:48:08 +0000 | [diff] [blame] | 438 | void *pCommitArg; /* Argument to xCommitCallback() */ |
| 439 | int (*xCommitCallback)(void*);/* Invoked at every commit. */ |
| 440 | void(*xCollNeeded)(void*,sqlite3*,int eTextRep,const char*); |
| 441 | void(*xCollNeeded16)(void*,sqlite3*,int eTextRep,const void*); |
| 442 | void *pCollNeededArg; |
| 443 | sqlite3_value *pValue; /* Value used for transient conversions */ |
| 444 | sqlite3_value *pErr; /* Most recent error message */ |
| 445 | char *zErrMsg; /* Most recent error message (UTF-8 encoded) */ |
| 446 | char *zErrMsg16; /* Most recent error message (UTF-16 encoded) */ |
drh | ed6c867 | 2003-01-12 18:02:16 +0000 | [diff] [blame] | 447 | #ifndef SQLITE_OMIT_AUTHORIZATION |
drh | e22a334 | 2003-04-22 20:30:37 +0000 | [diff] [blame] | 448 | int (*xAuth)(void*,int,const char*,const char*,const char*,const char*); |
| 449 | /* Access authorization function */ |
drh | ed6c867 | 2003-01-12 18:02:16 +0000 | [diff] [blame] | 450 | void *pAuthArg; /* 1st argument to the access auth function */ |
| 451 | #endif |
danielk1977 | 348bb5d | 2003-10-18 09:37:26 +0000 | [diff] [blame] | 452 | #ifndef SQLITE_OMIT_PROGRESS_CALLBACK |
| 453 | int (*xProgress)(void *); /* The progress callback */ |
| 454 | void *pProgressArg; /* Argument to the progress callback */ |
| 455 | int nProgressOps; /* Number of opcodes for progress callback */ |
| 456 | #endif |
danielk1977 | 6b456a2 | 2005-03-21 04:04:02 +0000 | [diff] [blame] | 457 | #ifndef SQLITE_OMIT_GLOBALRECOVER |
| 458 | sqlite3 *pNext; /* Linked list of open db handles. */ |
| 459 | #endif |
drh | fcd35c7 | 2005-05-21 02:48:08 +0000 | [diff] [blame] | 460 | Hash aFunc; /* All functions that can be in SQL exprs */ |
| 461 | Hash aCollSeq; /* All collating sequences */ |
| 462 | BusyHandler busyHandler; /* Busy callback */ |
drh | 97903fe | 2005-05-24 20:19:57 +0000 | [diff] [blame] | 463 | int busyTimeout; /* Busy handler timeout, in msec */ |
drh | fcd35c7 | 2005-05-21 02:48:08 +0000 | [diff] [blame] | 464 | Db aDbStatic[2]; /* Static space for the 2 default backends */ |
danielk1977 | 7e900ab | 2005-05-23 04:51:01 +0000 | [diff] [blame] | 465 | #ifdef SQLITE_SSE |
| 466 | sqlite3_stmt *pFetch; /* Used by SSE to fetch stored statements */ |
| 467 | #endif |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 468 | }; |
| 469 | |
| 470 | /* |
drh | 8bf8dc9 | 2003-05-17 17:35:10 +0000 | [diff] [blame] | 471 | ** Possible values for the sqlite.flags and or Db.flags fields. |
| 472 | ** |
| 473 | ** On sqlite.flags, the SQLITE_InTrans value means that we have |
| 474 | ** executed a BEGIN. On Db.flags, SQLITE_InTrans means a statement |
| 475 | ** transaction is active on that particular database file. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 476 | */ |
drh | 5e00f6c | 2001-09-13 13:46:56 +0000 | [diff] [blame] | 477 | #define SQLITE_VdbeTrace 0x00000001 /* True to trace VDBE execution */ |
| 478 | #define SQLITE_Initialized 0x00000002 /* True after initialization */ |
| 479 | #define SQLITE_Interrupt 0x00000004 /* Cancel current operation */ |
| 480 | #define SQLITE_InTrans 0x00000008 /* True if in a transaction */ |
| 481 | #define SQLITE_InternChanges 0x00000010 /* Uncommitted Hash table changes */ |
drh | 382c024 | 2001-10-06 16:33:02 +0000 | [diff] [blame] | 482 | #define SQLITE_FullColNames 0x00000020 /* Show full column names on SELECT */ |
drh | fcabd46 | 2004-02-20 14:50:58 +0000 | [diff] [blame] | 483 | #define SQLITE_ShortColNames 0x00000040 /* Show short columns names */ |
| 484 | #define SQLITE_CountRows 0x00000080 /* Count rows changed by INSERT, */ |
drh | 1bee3d7 | 2001-10-15 00:44:35 +0000 | [diff] [blame] | 485 | /* DELETE, or UPDATE and return */ |
| 486 | /* the count using a callback. */ |
drh | fcabd46 | 2004-02-20 14:50:58 +0000 | [diff] [blame] | 487 | #define SQLITE_NullCallback 0x00000100 /* Invoke the callback once if the */ |
drh | 6a53534 | 2001-10-19 16:44:56 +0000 | [diff] [blame] | 488 | /* result set is empty */ |
drh | 35d4c2f | 2004-06-10 01:30:59 +0000 | [diff] [blame] | 489 | #define SQLITE_SqlTrace 0x00000200 /* Debug print SQL as it executes */ |
| 490 | #define SQLITE_VdbeListing 0x00000400 /* Debug listings of VDBE programs */ |
drh | f404083 | 2004-10-22 20:29:21 +0000 | [diff] [blame] | 491 | #define SQLITE_WriteSchema 0x00000800 /* OK to update SQLITE_MASTER */ |
drh | 7bec505 | 2005-02-06 02:45:41 +0000 | [diff] [blame] | 492 | #define SQLITE_NoReadlock 0x00001000 /* Readlocks are omitted when |
| 493 | ** accessing read-only databases */ |
drh | 58b9576 | 2000-06-02 01:17:37 +0000 | [diff] [blame] | 494 | |
| 495 | /* |
drh | 247be43 | 2002-05-10 05:44:55 +0000 | [diff] [blame] | 496 | ** Possible values for the sqlite.magic field. |
| 497 | ** The numbers are obtained at random and have no special meaning, other |
| 498 | ** than being distinct from one another. |
| 499 | */ |
| 500 | #define SQLITE_MAGIC_OPEN 0xa029a697 /* Database is open */ |
| 501 | #define SQLITE_MAGIC_CLOSED 0x9f3c2d33 /* Database is closed */ |
| 502 | #define SQLITE_MAGIC_BUSY 0xf03b7906 /* Database currently in use */ |
| 503 | #define SQLITE_MAGIC_ERROR 0xb5357930 /* An SQLITE_MISUSE error occurred */ |
| 504 | |
| 505 | /* |
drh | 0bce835 | 2002-02-28 00:41:10 +0000 | [diff] [blame] | 506 | ** Each SQL function is defined by an instance of the following |
| 507 | ** structure. A pointer to this structure is stored in the sqlite.aFunc |
drh | 8e0a2f9 | 2002-02-23 23:45:45 +0000 | [diff] [blame] | 508 | ** hash table. When multiple functions have the same name, the hash table |
| 509 | ** points to a linked list of these structures. |
drh | 2803757 | 2000-08-02 13:47:41 +0000 | [diff] [blame] | 510 | */ |
drh | 0bce835 | 2002-02-28 00:41:10 +0000 | [diff] [blame] | 511 | struct FuncDef { |
drh | 55ef4d9 | 2005-08-14 01:20:37 +0000 | [diff] [blame] | 512 | i16 nArg; /* Number of arguments. -1 means unlimited */ |
danielk1977 | d812336 | 2004-06-12 09:25:12 +0000 | [diff] [blame] | 513 | u8 iPrefEnc; /* Preferred text encoding (SQLITE_UTF8, 16LE, 16BE) */ |
drh | 55ef4d9 | 2005-08-14 01:20:37 +0000 | [diff] [blame] | 514 | u8 needCollSeq; /* True if sqlite3GetFuncCollSeq() might be called */ |
| 515 | u8 flags; /* Some combination of SQLITE_FUNC_* */ |
drh | f9b596e | 2004-05-26 16:54:42 +0000 | [diff] [blame] | 516 | void *pUserData; /* User data parameter */ |
| 517 | FuncDef *pNext; /* Next function with same name */ |
| 518 | void (*xFunc)(sqlite3_context*,int,sqlite3_value**); /* Regular function */ |
| 519 | void (*xStep)(sqlite3_context*,int,sqlite3_value**); /* Aggregate step */ |
| 520 | void (*xFinalize)(sqlite3_context*); /* Aggregate finializer */ |
drh | 55ef4d9 | 2005-08-14 01:20:37 +0000 | [diff] [blame] | 521 | char zName[1]; /* SQL name of the function. MUST BE LAST */ |
drh | 8e0a2f9 | 2002-02-23 23:45:45 +0000 | [diff] [blame] | 522 | }; |
drh | 2803757 | 2000-08-02 13:47:41 +0000 | [diff] [blame] | 523 | |
| 524 | /* |
drh | 55ef4d9 | 2005-08-14 01:20:37 +0000 | [diff] [blame] | 525 | ** Possible values for FuncDef.flags |
| 526 | */ |
drh | d64fe2f | 2005-08-28 17:00:23 +0000 | [diff] [blame] | 527 | #define SQLITE_FUNC_LIKE 0x01 /* Candidate for the LIKE optimization */ |
| 528 | #define SQLITE_FUNC_CASE 0x02 /* Case-sensitive LIKE-type function */ |
drh | 55ef4d9 | 2005-08-14 01:20:37 +0000 | [diff] [blame] | 529 | |
| 530 | /* |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 531 | ** information about each column of an SQL table is held in an instance |
drh | 7020f65 | 2000-06-03 18:06:52 +0000 | [diff] [blame] | 532 | ** of this structure. |
| 533 | */ |
| 534 | struct Column { |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 535 | char *zName; /* Name of this column */ |
danielk1977 | 7977a17 | 2004-11-09 12:44:37 +0000 | [diff] [blame] | 536 | Expr *pDflt; /* Default value of this column */ |
drh | 382c024 | 2001-10-06 16:33:02 +0000 | [diff] [blame] | 537 | char *zType; /* Data type for this column */ |
drh | a9fd84b | 2004-05-18 23:21:35 +0000 | [diff] [blame] | 538 | CollSeq *pColl; /* Collating sequence. If NULL, use the default */ |
drh | 4a32431 | 2001-12-21 14:30:42 +0000 | [diff] [blame] | 539 | u8 notNull; /* True if there is a NOT NULL constraint */ |
drh | 78100cc | 2003-08-23 22:40:53 +0000 | [diff] [blame] | 540 | u8 isPrimKey; /* True if this column is part of the PRIMARY KEY */ |
danielk1977 | a37cdde | 2004-05-16 11:15:36 +0000 | [diff] [blame] | 541 | char affinity; /* One of the SQLITE_AFF_... values */ |
drh | 7020f65 | 2000-06-03 18:06:52 +0000 | [diff] [blame] | 542 | }; |
| 543 | |
| 544 | /* |
drh | a9fd84b | 2004-05-18 23:21:35 +0000 | [diff] [blame] | 545 | ** A "Collating Sequence" is defined by an instance of the following |
danielk1977 | 0202b29 | 2004-06-09 09:55:16 +0000 | [diff] [blame] | 546 | ** structure. Conceptually, a collating sequence consists of a name and |
| 547 | ** a comparison routine that defines the order of that sequence. |
drh | a9fd84b | 2004-05-18 23:21:35 +0000 | [diff] [blame] | 548 | ** |
danielk1977 | 0202b29 | 2004-06-09 09:55:16 +0000 | [diff] [blame] | 549 | ** There may two seperate implementations of the collation function, one |
| 550 | ** that processes text in UTF-8 encoding (CollSeq.xCmp) and another that |
| 551 | ** processes text encoded in UTF-16 (CollSeq.xCmp16), using the machine |
| 552 | ** native byte order. When a collation sequence is invoked, SQLite selects |
| 553 | ** the version that will require the least expensive encoding |
| 554 | ** transalations, if any. |
| 555 | ** |
| 556 | ** The CollSeq.pUser member variable is an extra parameter that passed in |
| 557 | ** as the first argument to the UTF-8 comparison function, xCmp. |
| 558 | ** CollSeq.pUser16 is the equivalent for the UTF-16 comparison function, |
| 559 | ** xCmp16. |
| 560 | ** |
| 561 | ** If both CollSeq.xCmp and CollSeq.xCmp16 are NULL, it means that the |
| 562 | ** collating sequence is undefined. Indices built on an undefined |
| 563 | ** collating sequence may not be read or written. |
drh | a9fd84b | 2004-05-18 23:21:35 +0000 | [diff] [blame] | 564 | */ |
| 565 | struct CollSeq { |
danielk1977 | 0202b29 | 2004-06-09 09:55:16 +0000 | [diff] [blame] | 566 | char *zName; /* Name of the collating sequence, UTF-8 encoded */ |
danielk1977 | 466be56 | 2004-06-10 02:16:01 +0000 | [diff] [blame] | 567 | u8 enc; /* Text encoding handled by xCmp() */ |
drh | d64fe2f | 2005-08-28 17:00:23 +0000 | [diff] [blame] | 568 | u8 type; /* One of the SQLITE_COLL_... values below */ |
drh | a9fd84b | 2004-05-18 23:21:35 +0000 | [diff] [blame] | 569 | void *pUser; /* First argument to xCmp() */ |
danielk1977 | 0202b29 | 2004-06-09 09:55:16 +0000 | [diff] [blame] | 570 | int (*xCmp)(void*,int, const void*, int, const void*); |
drh | a9fd84b | 2004-05-18 23:21:35 +0000 | [diff] [blame] | 571 | }; |
| 572 | |
| 573 | /* |
drh | d64fe2f | 2005-08-28 17:00:23 +0000 | [diff] [blame] | 574 | ** Allowed values of CollSeq flags: |
| 575 | */ |
| 576 | #define SQLITE_COLL_BINARY 1 /* The default memcmp() collating sequence */ |
| 577 | #define SQLITE_COLL_NOCASE 2 /* The built-in NOCASE collating sequence */ |
| 578 | #define SQLITE_COLL_REVERSE 3 /* The built-in REVERSE collating sequence */ |
| 579 | #define SQLITE_COLL_USER 0 /* Any other user-defined collating sequence */ |
| 580 | |
| 581 | /* |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 582 | ** A sort order can be either ASC or DESC. |
drh | 8e2ca02 | 2002-06-17 17:07:19 +0000 | [diff] [blame] | 583 | */ |
drh | 8e2ca02 | 2002-06-17 17:07:19 +0000 | [diff] [blame] | 584 | #define SQLITE_SO_ASC 0 /* Sort in ascending order */ |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 585 | #define SQLITE_SO_DESC 1 /* Sort in ascending order */ |
drh | 8e2ca02 | 2002-06-17 17:07:19 +0000 | [diff] [blame] | 586 | |
| 587 | /* |
danielk1977 | a37cdde | 2004-05-16 11:15:36 +0000 | [diff] [blame] | 588 | ** Column affinity types. |
| 589 | */ |
| 590 | #define SQLITE_AFF_INTEGER 'i' |
| 591 | #define SQLITE_AFF_NUMERIC 'n' |
| 592 | #define SQLITE_AFF_TEXT 't' |
| 593 | #define SQLITE_AFF_NONE 'o' |
| 594 | |
| 595 | |
| 596 | /* |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 597 | ** Each SQL table is represented in memory by an instance of the |
| 598 | ** following structure. |
| 599 | ** |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 600 | ** Table.zName is the name of the table. The case of the original |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 601 | ** CREATE TABLE statement is stored, but case is not significant for |
| 602 | ** comparisons. |
| 603 | ** |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 604 | ** Table.nCol is the number of columns in this table. Table.aCol is a |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 605 | ** pointer to an array of Column structures, one for each column. |
| 606 | ** |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 607 | ** If the table has an INTEGER PRIMARY KEY, then Table.iPKey is the index of |
| 608 | ** the column that is that key. Otherwise Table.iPKey is negative. Note |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 609 | ** that the datatype of the PRIMARY KEY must be INTEGER for this field to |
| 610 | ** be set. An INTEGER PRIMARY KEY is used as the rowid for each row of |
| 611 | ** the table. If a table has no INTEGER PRIMARY KEY, then a random rowid |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 612 | ** is generated for each row of the table. Table.hasPrimKey is true if |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 613 | ** the table has any PRIMARY KEY, INTEGER or otherwise. |
| 614 | ** |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 615 | ** Table.tnum is the page number for the root BTree page of the table in the |
| 616 | ** database file. If Table.iDb is the index of the database table backend |
| 617 | ** in sqlite.aDb[]. 0 is for the main database and 1 is for the file that |
| 618 | ** holds temporary tables and indices. If Table.isTransient |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 619 | ** is true, then the table is stored in a file that is automatically deleted |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 620 | ** when the VDBE cursor to the table is closed. In this case Table.tnum |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 621 | ** refers VDBE cursor number that holds the table open, not to the root |
| 622 | ** page number. Transient tables are used to hold the results of a |
| 623 | ** sub-query that appears instead of a real table name in the FROM clause |
| 624 | ** of a SELECT statement. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 625 | */ |
| 626 | struct Table { |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 627 | char *zName; /* Name of the table */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 628 | int nCol; /* Number of columns in this table */ |
| 629 | Column *aCol; /* Information about each column */ |
drh | c839258 | 2001-12-31 02:48:51 +0000 | [diff] [blame] | 630 | int iPKey; /* If not less then 0, use aCol[iPKey] as the primary key */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 631 | Index *pIndex; /* List of SQL indexes on this table. */ |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 632 | int tnum; /* Root BTree node for this table (see note above) */ |
drh | a76b5df | 2002-02-23 02:32:10 +0000 | [diff] [blame] | 633 | Select *pSelect; /* NULL for tables. Points to definition if a view. */ |
drh | 717e640 | 2001-09-27 03:22:32 +0000 | [diff] [blame] | 634 | u8 readOnly; /* True if this table should not be written by the user */ |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 635 | u8 iDb; /* Index into sqlite.aDb[] of the backend for this table */ |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 636 | u8 isTransient; /* True if automatically deleted when VDBE finishes */ |
drh | 4a32431 | 2001-12-21 14:30:42 +0000 | [diff] [blame] | 637 | u8 hasPrimKey; /* True if there exists a primary key */ |
drh | 9cfcf5d | 2002-01-29 18:41:24 +0000 | [diff] [blame] | 638 | u8 keyConf; /* What to do in case of uniqueness conflict on iPKey */ |
drh | 205f48e | 2004-11-05 00:43:11 +0000 | [diff] [blame] | 639 | u8 autoInc; /* True if the integer primary key is autoincrement */ |
drh | ed8a3bb | 2005-06-06 21:19:56 +0000 | [diff] [blame] | 640 | int nRef; /* Number of pointers to this Table */ |
danielk1977 | c3f9bad | 2002-05-15 08:30:12 +0000 | [diff] [blame] | 641 | Trigger *pTrigger; /* List of SQL triggers on this table */ |
drh | c2eef3b | 2002-08-31 18:53:06 +0000 | [diff] [blame] | 642 | FKey *pFKey; /* Linked list of all foreign keys in this table */ |
danielk1977 | 3d1bfea | 2004-05-14 11:00:53 +0000 | [diff] [blame] | 643 | char *zColAff; /* String defining the affinity of each column */ |
danielk1977 | 19a8e7e | 2005-03-17 05:03:38 +0000 | [diff] [blame] | 644 | #ifndef SQLITE_OMIT_ALTERTABLE |
| 645 | int addColOffset; /* Offset in CREATE TABLE statement to add a new column */ |
| 646 | #endif |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 647 | }; |
| 648 | |
| 649 | /* |
drh | c2eef3b | 2002-08-31 18:53:06 +0000 | [diff] [blame] | 650 | ** Each foreign key constraint is an instance of the following structure. |
| 651 | ** |
| 652 | ** A foreign key is associated with two tables. The "from" table is |
| 653 | ** the table that contains the REFERENCES clause that creates the foreign |
| 654 | ** key. The "to" table is the table that is named in the REFERENCES clause. |
| 655 | ** Consider this example: |
| 656 | ** |
| 657 | ** CREATE TABLE ex1( |
| 658 | ** a INTEGER PRIMARY KEY, |
| 659 | ** b INTEGER CONSTRAINT fk1 REFERENCES ex2(x) |
| 660 | ** ); |
| 661 | ** |
| 662 | ** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2". |
| 663 | ** |
| 664 | ** Each REFERENCES clause generates an instance of the following structure |
| 665 | ** which is attached to the from-table. The to-table need not exist when |
| 666 | ** the from-table is created. The existance of the to-table is not checked |
| 667 | ** until an attempt is made to insert data into the from-table. |
| 668 | ** |
drh | ea1ba17 | 2003-04-20 00:00:23 +0000 | [diff] [blame] | 669 | ** The sqlite.aFKey hash table stores pointers to this structure |
drh | c2eef3b | 2002-08-31 18:53:06 +0000 | [diff] [blame] | 670 | ** given the name of a to-table. For each to-table, all foreign keys |
| 671 | ** associated with that table are on a linked list using the FKey.pNextTo |
| 672 | ** field. |
| 673 | */ |
| 674 | struct FKey { |
| 675 | Table *pFrom; /* The table that constains the REFERENCES clause */ |
| 676 | FKey *pNextFrom; /* Next foreign key in pFrom */ |
| 677 | char *zTo; /* Name of table that the key points to */ |
| 678 | FKey *pNextTo; /* Next foreign key that points to zTo */ |
| 679 | int nCol; /* Number of columns in this key */ |
| 680 | struct sColMap { /* Mapping of columns in pFrom to columns in zTo */ |
| 681 | int iFrom; /* Index of column in pFrom */ |
| 682 | char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */ |
| 683 | } *aCol; /* One entry for each of nCol column s */ |
| 684 | u8 isDeferred; /* True if constraint checking is deferred till COMMIT */ |
| 685 | u8 updateConf; /* How to resolve conflicts that occur on UPDATE */ |
| 686 | u8 deleteConf; /* How to resolve conflicts that occur on DELETE */ |
| 687 | u8 insertConf; /* How to resolve conflicts that occur on INSERT */ |
| 688 | }; |
| 689 | |
| 690 | /* |
| 691 | ** SQLite supports many different ways to resolve a contraint |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 692 | ** error. ROLLBACK processing means that a constraint violation |
drh | 0bd1f4e | 2002-06-06 18:54:39 +0000 | [diff] [blame] | 693 | ** causes the operation in process to fail and for the current transaction |
drh | 1c92853 | 2002-01-31 15:54:21 +0000 | [diff] [blame] | 694 | ** to be rolled back. ABORT processing means the operation in process |
| 695 | ** fails and any prior changes from that one operation are backed out, |
| 696 | ** but the transaction is not rolled back. FAIL processing means that |
| 697 | ** the operation in progress stops and returns an error code. But prior |
| 698 | ** changes due to the same operation are not backed out and no rollback |
| 699 | ** occurs. IGNORE means that the particular row that caused the constraint |
| 700 | ** error is not inserted or updated. Processing continues and no error |
| 701 | ** is returned. REPLACE means that preexisting database rows that caused |
| 702 | ** a UNIQUE constraint violation are removed so that the new insert or |
| 703 | ** update can proceed. Processing continues and no error is reported. |
drh | c2eef3b | 2002-08-31 18:53:06 +0000 | [diff] [blame] | 704 | ** |
| 705 | ** RESTRICT, SETNULL, and CASCADE actions apply only to foreign keys. |
| 706 | ** RESTRICT is the same as ABORT for IMMEDIATE foreign keys and the |
| 707 | ** same as ROLLBACK for DEFERRED keys. SETNULL means that the foreign |
| 708 | ** key is set to NULL. CASCADE means that a DELETE or UPDATE of the |
| 709 | ** referenced table row is propagated into the row that holds the |
| 710 | ** foreign key. |
drh | 1c92853 | 2002-01-31 15:54:21 +0000 | [diff] [blame] | 711 | ** |
drh | 968af52 | 2003-02-11 14:55:40 +0000 | [diff] [blame] | 712 | ** The following symbolic values are used to record which type |
drh | 1c92853 | 2002-01-31 15:54:21 +0000 | [diff] [blame] | 713 | ** of action to take. |
drh | 9cfcf5d | 2002-01-29 18:41:24 +0000 | [diff] [blame] | 714 | */ |
drh | 1c92853 | 2002-01-31 15:54:21 +0000 | [diff] [blame] | 715 | #define OE_None 0 /* There is no constraint to check */ |
| 716 | #define OE_Rollback 1 /* Fail the operation and rollback the transaction */ |
| 717 | #define OE_Abort 2 /* Back out changes but do no rollback transaction */ |
| 718 | #define OE_Fail 3 /* Stop the operation but leave all prior changes */ |
| 719 | #define OE_Ignore 4 /* Ignore the error. Do not do the INSERT or UPDATE */ |
| 720 | #define OE_Replace 5 /* Delete existing record, then do INSERT or UPDATE */ |
drh | c2eef3b | 2002-08-31 18:53:06 +0000 | [diff] [blame] | 721 | |
| 722 | #define OE_Restrict 6 /* OE_Abort for IMMEDIATE, OE_Rollback for DEFERRED */ |
| 723 | #define OE_SetNull 7 /* Set the foreign key value to NULL */ |
| 724 | #define OE_SetDflt 8 /* Set the foreign key value to its default */ |
| 725 | #define OE_Cascade 9 /* Cascade the changes */ |
| 726 | |
| 727 | #define OE_Default 99 /* Do whatever the default action is */ |
drh | 9cfcf5d | 2002-01-29 18:41:24 +0000 | [diff] [blame] | 728 | |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 729 | |
| 730 | /* |
| 731 | ** An instance of the following structure is passed as the first |
| 732 | ** argument to sqlite3VdbeKeyCompare and is used to control the |
| 733 | ** comparison of the two index keys. |
| 734 | ** |
| 735 | ** If the KeyInfo.incrKey value is true and the comparison would |
drh | 7e62779 | 2005-04-29 02:10:00 +0000 | [diff] [blame] | 736 | ** otherwise be equal, then return a result as if the second key |
| 737 | ** were larger. |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 738 | */ |
| 739 | struct KeyInfo { |
danielk1977 | b1bc953 | 2004-05-22 03:05:33 +0000 | [diff] [blame] | 740 | u8 enc; /* Text encoding - one of the TEXT_Utf* values */ |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 741 | u8 incrKey; /* Increase 2nd key by epsilon before comparison */ |
| 742 | int nField; /* Number of entries in aColl[] */ |
drh | ffbc308 | 2004-05-21 01:29:06 +0000 | [diff] [blame] | 743 | u8 *aSortOrder; /* If defined an aSortOrder[i] is true, sort DESC */ |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 744 | CollSeq *aColl[1]; /* Collating sequence for each term of the key */ |
| 745 | }; |
| 746 | |
drh | 9cfcf5d | 2002-01-29 18:41:24 +0000 | [diff] [blame] | 747 | /* |
drh | 66b89c8 | 2000-11-28 20:47:17 +0000 | [diff] [blame] | 748 | ** Each SQL index is represented in memory by an |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 749 | ** instance of the following structure. |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 750 | ** |
| 751 | ** The columns of the table that are to be indexed are described |
| 752 | ** by the aiColumn[] field of this structure. For example, suppose |
| 753 | ** we have the following table and index: |
| 754 | ** |
| 755 | ** CREATE TABLE Ex1(c1 int, c2 int, c3 text); |
| 756 | ** CREATE INDEX Ex2 ON Ex1(c3,c1); |
| 757 | ** |
| 758 | ** In the Table structure describing Ex1, nCol==3 because there are |
| 759 | ** three columns in the table. In the Index structure describing |
| 760 | ** Ex2, nColumn==2 since 2 of the 3 columns of Ex1 are indexed. |
| 761 | ** The value of aiColumn is {2, 0}. aiColumn[0]==2 because the |
| 762 | ** first column to be indexed (c3) has an index of 2 in Ex1.aCol[]. |
| 763 | ** The second column to be indexed (c1) has an index of 0 in |
| 764 | ** Ex1.aCol[], hence Ex2.aiColumn[1]==0. |
drh | ea1ba17 | 2003-04-20 00:00:23 +0000 | [diff] [blame] | 765 | ** |
| 766 | ** The Index.onError field determines whether or not the indexed columns |
| 767 | ** must be unique and what to do if they are not. When Index.onError=OE_None, |
| 768 | ** it means this is not a unique index. Otherwise it is a unique index |
| 769 | ** and the value of Index.onError indicate the which conflict resolution |
| 770 | ** algorithm to employ whenever an attempt is made to insert a non-unique |
| 771 | ** element. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 772 | */ |
| 773 | struct Index { |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 774 | char *zName; /* Name of this index */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 775 | int nColumn; /* Number of columns in the table used by this index */ |
| 776 | int *aiColumn; /* Which columns are used by this index. 1st is 0 */ |
drh | 8b3d990 | 2005-08-19 00:14:42 +0000 | [diff] [blame] | 777 | unsigned *aiRowEst; /* Result of ANALYZE: Est. rows selected by each column */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 778 | Table *pTable; /* The SQL table being indexed */ |
drh | be0072d | 2001-09-13 14:46:09 +0000 | [diff] [blame] | 779 | int tnum; /* Page containing root of this index in database file */ |
drh | 9cfcf5d | 2002-01-29 18:41:24 +0000 | [diff] [blame] | 780 | u8 onError; /* OE_Abort, OE_Ignore, OE_Replace, or OE_None */ |
drh | 485b39b | 2002-07-13 03:11:52 +0000 | [diff] [blame] | 781 | u8 autoIndex; /* True if is automatically created (ex: by UNIQUE) */ |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 782 | u8 iDb; /* Index in sqlite.aDb[] of where this index is stored */ |
danielk1977 | a37cdde | 2004-05-16 11:15:36 +0000 | [diff] [blame] | 783 | char *zColAff; /* String defining the affinity of each column */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 784 | Index *pNext; /* The next index associated with the same table */ |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 785 | KeyInfo keyInfo; /* Info on how to order keys. MUST BE LAST */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 786 | }; |
| 787 | |
| 788 | /* |
| 789 | ** Each token coming out of the lexer is an instance of |
drh | 4b59ab5 | 2002-08-24 18:24:51 +0000 | [diff] [blame] | 790 | ** this structure. Tokens are also used as part of an expression. |
drh | 4efc475 | 2004-01-16 15:55:37 +0000 | [diff] [blame] | 791 | ** |
| 792 | ** Note if Token.z==0 then Token.dyn and Token.n are undefined and |
| 793 | ** may contain random values. Do not make any assuptions about Token.dyn |
| 794 | ** and Token.n when Token.z==0. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 795 | */ |
| 796 | struct Token { |
drh | 4c755c0 | 2004-08-08 20:22:17 +0000 | [diff] [blame] | 797 | const unsigned char *z; /* Text of the token. Not NULL-terminated! */ |
| 798 | unsigned dyn : 1; /* True for malloced memory, false for static */ |
| 799 | unsigned n : 31; /* Number of characters in this token */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 800 | }; |
| 801 | |
| 802 | /* |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 803 | ** An instance of this structure contains information needed to generate |
| 804 | ** code for a SELECT that contains aggregate functions. |
| 805 | ** |
| 806 | ** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a |
| 807 | ** pointer to this structure. The Expr.iColumn field is the index in |
| 808 | ** AggInfo.aCol[] or AggInfo.aFunc[] of information needed to generate |
| 809 | ** code for that node. |
| 810 | ** |
| 811 | ** AggInfo.pGroupBy and AggInfo.aFunc.pExpr point to fields within the |
| 812 | ** original Select structure that describes the SELECT statement. These |
| 813 | ** fields do not need to be freed when deallocating the AggInfo structure. |
| 814 | */ |
| 815 | struct AggInfo { |
| 816 | u8 directMode; /* Direct rendering mode means take data directly |
| 817 | ** from source tables rather than from accumulators */ |
| 818 | u8 useSortingIdx; /* In direct mode, reference the sorting index rather |
| 819 | ** than the source table */ |
| 820 | int sortingIdx; /* Cursor number of the sorting index */ |
| 821 | ExprList *pGroupBy; /* The group by clause */ |
| 822 | int nSortingColumn; /* Number of columns in the sorting index */ |
| 823 | struct AggInfo_col { /* For each column used in source tables */ |
| 824 | int iTable; /* Cursor number of the source table */ |
| 825 | int iColumn; /* Column number within the source table */ |
| 826 | int iSorterColumn; /* Column number in the sorting index */ |
| 827 | int iMem; /* Memory location that acts as accumulator */ |
drh | 5774b80 | 2005-09-07 22:48:16 +0000 | [diff] [blame] | 828 | Expr *pExpr; /* The original expression */ |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 829 | } *aCol; |
| 830 | int nColumn; /* Number of used entries in aCol[] */ |
| 831 | int nColumnAlloc; /* Number of slots allocated for aCol[] */ |
| 832 | int nAccumulator; /* Number of columns that show through to the output. |
| 833 | ** Additional columns are used only as parameters to |
| 834 | ** aggregate functions */ |
| 835 | struct AggInfo_func { /* For each aggregate function */ |
| 836 | Expr *pExpr; /* Expression encoding the function */ |
| 837 | FuncDef *pFunc; /* The aggregate function implementation */ |
| 838 | int iMem; /* Memory location that acts as accumulator */ |
drh | fd35797 | 2005-09-09 01:33:19 +0000 | [diff] [blame] | 839 | int iDistinct; /* Virtual table used to enforce DISTINCT */ |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 840 | } *aFunc; |
| 841 | int nFunc; /* Number of entries in aFunc[] */ |
| 842 | int nFuncAlloc; /* Number of slots allocated for aFunc[] */ |
| 843 | }; |
| 844 | |
| 845 | /* |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 846 | ** Each node of an expression in the parse tree is an instance |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 847 | ** of this structure. |
| 848 | ** |
| 849 | ** Expr.op is the opcode. The integer parser token codes are reused |
| 850 | ** as opcodes here. For example, the parser defines TK_GE to be an integer |
| 851 | ** code representing the ">=" operator. This same integer code is reused |
| 852 | ** to represent the greater-than-or-equal-to operator in the expression |
| 853 | ** tree. |
| 854 | ** |
| 855 | ** Expr.pRight and Expr.pLeft are subexpressions. Expr.pList is a list |
| 856 | ** of argument if the expression is a function. |
| 857 | ** |
drh | 4b59ab5 | 2002-08-24 18:24:51 +0000 | [diff] [blame] | 858 | ** Expr.token is the operator token for this node. For some expressions |
| 859 | ** that have subexpressions, Expr.token can be the complete text that gave |
| 860 | ** rise to the Expr. In the latter case, the token is marked as being |
| 861 | ** a compound token. |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 862 | ** |
| 863 | ** An expression of the form ID or ID.ID refers to a column in a table. |
| 864 | ** For such expressions, Expr.op is set to TK_COLUMN and Expr.iTable is |
| 865 | ** the integer cursor number of a VDBE cursor pointing to that table and |
| 866 | ** Expr.iColumn is the column number for the specific column. If the |
| 867 | ** expression is used as a result in an aggregate SELECT, then the |
| 868 | ** value is also stored in the Expr.iAgg column in the aggregate so that |
| 869 | ** it can be accessed after all aggregates are computed. |
| 870 | ** |
| 871 | ** If the expression is a function, the Expr.iTable is an integer code |
drh | 7c972de | 2003-09-06 22:18:07 +0000 | [diff] [blame] | 872 | ** representing which function. If the expression is an unbound variable |
| 873 | ** marker (a question mark character '?' in the original SQL) then the |
| 874 | ** Expr.iTable holds the index number for that variable. |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 875 | ** |
drh | 1398ad3 | 2005-01-19 23:24:50 +0000 | [diff] [blame] | 876 | ** If the expression is a subquery then Expr.iColumn holds an integer |
| 877 | ** register number containing the result of the subquery. If the |
| 878 | ** subquery gives a constant result, then iTable is -1. If the subquery |
| 879 | ** gives a different answer at different times during statement processing |
| 880 | ** then iTable is the address of a subroutine that computes the subquery. |
| 881 | ** |
drh | 22f70c3 | 2002-02-18 01:17:00 +0000 | [diff] [blame] | 882 | ** The Expr.pSelect field points to a SELECT statement. The SELECT might |
| 883 | ** be the right operand of an IN operator. Or, if a scalar SELECT appears |
| 884 | ** in an expression the opcode is TK_SELECT and Expr.pSelect is the only |
| 885 | ** operand. |
danielk1977 | aee18ef | 2005-03-09 12:26:50 +0000 | [diff] [blame] | 886 | ** |
| 887 | ** If the Expr is of type OP_Column, and the table it is selecting from |
| 888 | ** is a disk table or the "old.*" pseudo-table, then pTab points to the |
| 889 | ** corresponding table definition. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 890 | */ |
| 891 | struct Expr { |
drh | 1cc093c | 2002-06-24 22:01:57 +0000 | [diff] [blame] | 892 | u8 op; /* Operation performed by this node */ |
drh | a9fd84b | 2004-05-18 23:21:35 +0000 | [diff] [blame] | 893 | char affinity; /* The affinity of the column or 0 if not a column */ |
drh | b5a20d3 | 2003-04-23 12:25:23 +0000 | [diff] [blame] | 894 | u8 iDb; /* Database referenced by this expression */ |
drh | e22a334 | 2003-04-22 20:30:37 +0000 | [diff] [blame] | 895 | u8 flags; /* Various flags. See below */ |
drh | f2bc013 | 2004-10-04 13:19:23 +0000 | [diff] [blame] | 896 | CollSeq *pColl; /* The collation type of the column or 0 */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 897 | Expr *pLeft, *pRight; /* Left and right subnodes */ |
drh | d99f706 | 2002-06-08 23:25:08 +0000 | [diff] [blame] | 898 | ExprList *pList; /* A list of expressions used as function arguments |
| 899 | ** or in "<expr> IN (<expr-list)" */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 900 | Token token; /* An operand token */ |
drh | 6977fea | 2002-10-22 23:38:04 +0000 | [diff] [blame] | 901 | Token span; /* Complete text of the expression */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 902 | int iTable, iColumn; /* When op==TK_COLUMN, then this expr node means the |
drh | 8e2ca02 | 2002-06-17 17:07:19 +0000 | [diff] [blame] | 903 | ** iColumn-th field of the iTable-th table. */ |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 904 | AggInfo *pAggInfo; /* Used by TK_AGG_COLUMN and TK_AGG_FUNCTION */ |
| 905 | int iAgg; /* Which entry in pAggInfo->aCol[] or ->aFunc[] */ |
drh | 22d6a53 | 2005-09-19 21:05:48 +0000 | [diff] [blame] | 906 | int iRightJoinTable; /* If EP_FromJoin, the right table of the join */ |
drh | d99f706 | 2002-06-08 23:25:08 +0000 | [diff] [blame] | 907 | Select *pSelect; /* When the expression is a sub-select. Also the |
| 908 | ** right side of "<expr> IN (<select>)" */ |
danielk1977 | aee18ef | 2005-03-09 12:26:50 +0000 | [diff] [blame] | 909 | Table *pTab; /* Table for OP_Column expressions. */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 910 | }; |
| 911 | |
| 912 | /* |
drh | 1f16230 | 2002-10-27 19:35:33 +0000 | [diff] [blame] | 913 | ** The following are the meanings of bits in the Expr.flags field. |
| 914 | */ |
drh | 392e597 | 2005-07-08 14:14:22 +0000 | [diff] [blame] | 915 | #define EP_FromJoin 0x01 /* Originated in ON or USING clause of a join */ |
| 916 | #define EP_Agg 0x02 /* Contains one or more aggregate functions */ |
| 917 | #define EP_Resolved 0x04 /* IDs have been resolved to COLUMNs */ |
| 918 | #define EP_Error 0x08 /* Expression contains one or more errors */ |
drh | fd35797 | 2005-09-09 01:33:19 +0000 | [diff] [blame] | 919 | #define EP_Distinct 0x10 /* Aggregate function with DISTINCT keyword */ |
drh | 392e597 | 2005-07-08 14:14:22 +0000 | [diff] [blame] | 920 | #define EP_VarSelect 0x20 /* pSelect is correlated, not constant */ |
drh | d2687b7 | 2005-08-12 22:56:09 +0000 | [diff] [blame] | 921 | #define EP_Dequoted 0x40 /* True if the string has been dequoted */ |
drh | 1f16230 | 2002-10-27 19:35:33 +0000 | [diff] [blame] | 922 | |
| 923 | /* |
| 924 | ** These macros can be used to test, set, or clear bits in the |
| 925 | ** Expr.flags field. |
| 926 | */ |
| 927 | #define ExprHasProperty(E,P) (((E)->flags&(P))==(P)) |
| 928 | #define ExprHasAnyProperty(E,P) (((E)->flags&(P))!=0) |
| 929 | #define ExprSetProperty(E,P) (E)->flags|=(P) |
| 930 | #define ExprClearProperty(E,P) (E)->flags&=~(P) |
| 931 | |
| 932 | /* |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 933 | ** A list of expressions. Each expression may optionally have a |
| 934 | ** name. An expr/name combination can be used in several ways, such |
| 935 | ** as the list of "expr AS ID" fields following a "SELECT" or in the |
| 936 | ** list of "ID = expr" items in an UPDATE. A list of expressions can |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 937 | ** also be used as the argument to a function, in which case the a.zName |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 938 | ** field is not used. |
| 939 | */ |
| 940 | struct ExprList { |
| 941 | int nExpr; /* Number of expressions on the list */ |
drh | 4305d10 | 2003-07-30 12:34:12 +0000 | [diff] [blame] | 942 | int nAlloc; /* Number of entries allocated below */ |
drh | 9d2985c | 2005-09-08 01:58:42 +0000 | [diff] [blame] | 943 | int iECursor; /* VDBE Cursor associated with this ExprList */ |
drh | 6d4abfb | 2001-10-22 02:58:08 +0000 | [diff] [blame] | 944 | struct ExprList_item { |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 945 | Expr *pExpr; /* The list of expressions */ |
| 946 | char *zName; /* Token associated with this expression */ |
drh | 8e2ca02 | 2002-06-17 17:07:19 +0000 | [diff] [blame] | 947 | u8 sortOrder; /* 1 for DESC or 0 for ASC */ |
| 948 | u8 isAgg; /* True if this is an aggregate like count(*) */ |
| 949 | u8 done; /* A flag to indicate when processing is finished */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 950 | } *a; /* One entry for each expression */ |
| 951 | }; |
| 952 | |
| 953 | /* |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 954 | ** An instance of this structure can hold a simple list of identifiers, |
| 955 | ** such as the list "a,b,c" in the following statements: |
| 956 | ** |
| 957 | ** INSERT INTO t(a,b,c) VALUES ...; |
| 958 | ** CREATE INDEX idx ON t(a,b,c); |
| 959 | ** CREATE TRIGGER trig BEFORE UPDATE ON t(a,b,c) ...; |
| 960 | ** |
| 961 | ** The IdList.a.idx field is used when the IdList represents the list of |
| 962 | ** column names after a table name in an INSERT statement. In the statement |
| 963 | ** |
| 964 | ** INSERT INTO t(a,b,c) ... |
| 965 | ** |
| 966 | ** If "a" is the k-th column of table "t", then IdList.a[0].idx==k. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 967 | */ |
| 968 | struct IdList { |
drh | 6d4abfb | 2001-10-22 02:58:08 +0000 | [diff] [blame] | 969 | struct IdList_item { |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 970 | char *zName; /* Name of the identifier */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 971 | int idx; /* Index in some Table.aCol[] of a column named zName */ |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 972 | } *a; |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 973 | int nId; /* Number of identifiers on the list */ |
| 974 | int nAlloc; /* Number of entries allocated for a[] below */ |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 975 | }; |
| 976 | |
| 977 | /* |
drh | 5166986 | 2004-12-18 18:40:26 +0000 | [diff] [blame] | 978 | ** The bitmask datatype defined below is used for various optimizations. |
| 979 | */ |
| 980 | typedef unsigned int Bitmask; |
| 981 | |
| 982 | /* |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 983 | ** The following structure describes the FROM clause of a SELECT statement. |
| 984 | ** Each table or subquery in the FROM clause is a separate element of |
| 985 | ** the SrcList.a[] array. |
drh | d24cc42 | 2003-03-27 12:51:24 +0000 | [diff] [blame] | 986 | ** |
| 987 | ** With the addition of multiple database support, the following structure |
| 988 | ** can also be used to describe a particular table such as the table that |
| 989 | ** is modified by an INSERT, DELETE, or UPDATE statement. In standard SQL, |
| 990 | ** such a table must be a simple name: ID. But in SQLite, the table can |
| 991 | ** now be identified by a database name, a dot, then the table name: ID.ID. |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 992 | */ |
| 993 | struct SrcList { |
drh | 939a16d | 2004-07-15 13:37:22 +0000 | [diff] [blame] | 994 | i16 nSrc; /* Number of tables or subqueries in the FROM clause */ |
| 995 | i16 nAlloc; /* Number of entries allocated in a[] below */ |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 996 | struct SrcList_item { |
drh | 113088e | 2003-03-20 01:16:58 +0000 | [diff] [blame] | 997 | char *zDatabase; /* Name of database holding this table */ |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 998 | char *zName; /* Name of the table */ |
| 999 | char *zAlias; /* The "B" part of a "A AS B" phrase. zName is the "A" */ |
drh | daffd0e | 2001-04-11 14:28:42 +0000 | [diff] [blame] | 1000 | Table *pTab; /* An SQL table corresponding to zName */ |
| 1001 | Select *pSelect; /* A SELECT statement used in place of a table name */ |
drh | fe05af8 | 2005-07-21 03:14:59 +0000 | [diff] [blame] | 1002 | u8 jointype; /* Type of join between this table and the next */ |
| 1003 | i16 iCursor; /* The VDBE cursor number used to access this table */ |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 1004 | Expr *pOn; /* The ON clause of a join */ |
| 1005 | IdList *pUsing; /* The USING clause of a join */ |
drh | 5166986 | 2004-12-18 18:40:26 +0000 | [diff] [blame] | 1006 | Bitmask colUsed; /* Bit N (1<<N) set if column N or pTab is used */ |
drh | 113088e | 2003-03-20 01:16:58 +0000 | [diff] [blame] | 1007 | } a[1]; /* One entry for each identifier on the list */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1008 | }; |
| 1009 | |
| 1010 | /* |
drh | 01f3f25 | 2002-05-24 16:14:15 +0000 | [diff] [blame] | 1011 | ** Permitted values of the SrcList.a.jointype field |
| 1012 | */ |
| 1013 | #define JT_INNER 0x0001 /* Any kind of inner or cross join */ |
drh | 3dec223 | 2005-09-10 15:28:09 +0000 | [diff] [blame] | 1014 | #define JT_CROSS 0x0002 /* Explicit use of the CROSS keyword */ |
| 1015 | #define JT_NATURAL 0x0004 /* True for a "natural" join */ |
| 1016 | #define JT_LEFT 0x0008 /* Left outer join */ |
| 1017 | #define JT_RIGHT 0x0010 /* Right outer join */ |
| 1018 | #define JT_OUTER 0x0020 /* The "OUTER" keyword is present */ |
| 1019 | #define JT_ERROR 0x0040 /* unknown or unsupported join type */ |
drh | 01f3f25 | 2002-05-24 16:14:15 +0000 | [diff] [blame] | 1020 | |
| 1021 | /* |
drh | 6b56344 | 2001-11-07 16:48:26 +0000 | [diff] [blame] | 1022 | ** For each nested loop in a WHERE clause implementation, the WhereInfo |
| 1023 | ** structure contains a single instance of this structure. This structure |
| 1024 | ** is intended to be private the the where.c module and should not be |
| 1025 | ** access or modified by other modules. |
| 1026 | */ |
| 1027 | struct WhereLevel { |
drh | 29dda4a | 2005-07-21 18:23:20 +0000 | [diff] [blame] | 1028 | int iFrom; /* Which entry in the FROM clause */ |
| 1029 | int flags; /* Flags associated with this level */ |
drh | 51147ba | 2005-07-23 22:59:55 +0000 | [diff] [blame] | 1030 | int iMem; /* First memory cell used by this level */ |
drh | 29dda4a | 2005-07-21 18:23:20 +0000 | [diff] [blame] | 1031 | int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */ |
| 1032 | Index *pIdx; /* Index used. NULL if no index */ |
| 1033 | int iTabCur; /* The VDBE cursor used to access the table */ |
| 1034 | int iIdxCur; /* The VDBE cursor used to acesss pIdx */ |
| 1035 | int brk; /* Jump here to break out of the loop */ |
| 1036 | int cont; /* Jump here to continue with the next loop cycle */ |
| 1037 | int top; /* First instruction of interior of the loop */ |
| 1038 | int op, p1, p2; /* Opcode used to terminate the loop */ |
drh | 51147ba | 2005-07-23 22:59:55 +0000 | [diff] [blame] | 1039 | int nEq; /* Number of == or IN constraints on this loop */ |
drh | e23399f | 2005-07-22 00:31:39 +0000 | [diff] [blame] | 1040 | int nIn; /* Number of IN operators constraining this loop */ |
| 1041 | int *aInLoop; /* Loop terminators for IN operators */ |
drh | 6b56344 | 2001-11-07 16:48:26 +0000 | [diff] [blame] | 1042 | }; |
| 1043 | |
| 1044 | /* |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1045 | ** The WHERE clause processing routine has two halves. The |
| 1046 | ** first part does the start of the WHERE loop and the second |
| 1047 | ** half does the tail of the WHERE loop. An instance of |
| 1048 | ** this structure is returned by the first half and passed |
| 1049 | ** into the second half to give some continuity. |
| 1050 | */ |
| 1051 | struct WhereInfo { |
| 1052 | Parse *pParse; |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 1053 | SrcList *pTabList; /* List of tables in the join */ |
drh | 9012bcb | 2004-12-19 00:11:35 +0000 | [diff] [blame] | 1054 | int iTop; /* The very beginning of the WHERE loop */ |
drh | 19a775c | 2000-06-05 18:54:46 +0000 | [diff] [blame] | 1055 | int iContinue; /* Jump here to continue with next record */ |
| 1056 | int iBreak; /* Jump here to break out of the loop */ |
drh | 6b56344 | 2001-11-07 16:48:26 +0000 | [diff] [blame] | 1057 | int nLevel; /* Number of nested loop */ |
| 1058 | WhereLevel a[1]; /* Information about each nest loop in the WHERE */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1059 | }; |
| 1060 | |
| 1061 | /* |
danielk1977 | b3bce66 | 2005-01-29 08:32:43 +0000 | [diff] [blame] | 1062 | ** A NameContext defines a context in which to resolve table and column |
| 1063 | ** names. The context consists of a list of tables (the pSrcList) field and |
| 1064 | ** a list of named expression (pEList). The named expression list may |
| 1065 | ** be NULL. The pSrc corresponds to the FROM clause of a SELECT or |
| 1066 | ** to the table being operated on by INSERT, UPDATE, or DELETE. The |
| 1067 | ** pEList corresponds to the result set of a SELECT and is NULL for |
| 1068 | ** other statements. |
| 1069 | ** |
| 1070 | ** NameContexts can be nested. When resolving names, the inner-most |
| 1071 | ** context is searched first. If no match is found, the next outer |
| 1072 | ** context is checked. If there is still no match, the next context |
| 1073 | ** is checked. This process continues until either a match is found |
| 1074 | ** or all contexts are check. When a match is found, the nRef member of |
| 1075 | ** the context containing the match is incremented. |
| 1076 | ** |
| 1077 | ** Each subquery gets a new NameContext. The pNext field points to the |
| 1078 | ** NameContext in the parent query. Thus the process of scanning the |
| 1079 | ** NameContext list corresponds to searching through successively outer |
| 1080 | ** subqueries looking for a match. |
| 1081 | */ |
| 1082 | struct NameContext { |
| 1083 | Parse *pParse; /* The parser */ |
| 1084 | SrcList *pSrcList; /* One or more tables used to resolve names */ |
| 1085 | ExprList *pEList; /* Optional list of named expressions */ |
| 1086 | int nRef; /* Number of names resolved by this context */ |
| 1087 | int nErr; /* Number of errors encountered while resolving names */ |
| 1088 | u8 allowAgg; /* Aggregate functions allowed here */ |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 1089 | u8 hasAgg; /* True if aggregates are seen */ |
danielk1977 | b3bce66 | 2005-01-29 08:32:43 +0000 | [diff] [blame] | 1090 | int nDepth; /* Depth of subquery recursion. 1 for no recursion */ |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 1091 | AggInfo *pAggInfo; /* Information about aggregates at this level */ |
danielk1977 | b3bce66 | 2005-01-29 08:32:43 +0000 | [diff] [blame] | 1092 | NameContext *pNext; /* Next outer name context. NULL for outermost */ |
| 1093 | }; |
| 1094 | |
| 1095 | /* |
drh | 9bb61fe | 2000-06-05 16:01:39 +0000 | [diff] [blame] | 1096 | ** An instance of the following structure contains all information |
| 1097 | ** needed to generate code for a single SELECT statement. |
drh | a76b5df | 2002-02-23 02:32:10 +0000 | [diff] [blame] | 1098 | ** |
drh | d11d382 | 2002-06-21 23:01:49 +0000 | [diff] [blame] | 1099 | ** nLimit is set to -1 if there is no LIMIT clause. nOffset is set to 0. |
| 1100 | ** If there is a LIMIT clause, the parser sets nLimit to the value of the |
| 1101 | ** limit and nOffset to the value of the offset (or 0 if there is not |
| 1102 | ** offset). But later on, nLimit and nOffset become the memory locations |
| 1103 | ** in the VDBE that record the limit and offset counters. |
drh | 0342b1f | 2005-09-01 03:07:44 +0000 | [diff] [blame] | 1104 | ** |
| 1105 | ** addrOpenVirt[] entries contain the address of OP_OpenVirtual opcodes. |
| 1106 | ** These addresses must be stored so that we can go back and fill in |
| 1107 | ** the P3_KEYINFO and P2 parameters later. Neither the KeyInfo nor |
| 1108 | ** the number of columns in P2 can be computed at the same time |
| 1109 | ** as the OP_OpenVirtual instruction is coded because not |
| 1110 | ** enough information about the compound query is known at that point. |
| 1111 | ** The KeyInfo for addrOpenVirt[0] and [1] contains collating sequences |
| 1112 | ** for the result set. The KeyInfo for addrOpenVirt[2] contains collating |
| 1113 | ** sequences for the ORDER BY clause. |
drh | 9bb61fe | 2000-06-05 16:01:39 +0000 | [diff] [blame] | 1114 | */ |
| 1115 | struct Select { |
drh | 9bb61fe | 2000-06-05 16:01:39 +0000 | [diff] [blame] | 1116 | ExprList *pEList; /* The fields of the result */ |
drh | 7b58dae | 2003-07-20 01:16:46 +0000 | [diff] [blame] | 1117 | u8 op; /* One of: TK_UNION TK_ALL TK_INTERSECT TK_EXCEPT */ |
| 1118 | u8 isDistinct; /* True if the DISTINCT keyword is present */ |
drh | 0342b1f | 2005-09-01 03:07:44 +0000 | [diff] [blame] | 1119 | u8 isResolved; /* True once sqlite3SelectResolve() has run. */ |
| 1120 | u8 isAgg; /* True if this is an aggregate query */ |
| 1121 | u8 usesVirt; /* True if uses an OpenVirtual opcode */ |
drh | 4b14b4d | 2005-09-19 17:35:53 +0000 | [diff] [blame] | 1122 | u8 disallowOrderBy; /* Do not allow an ORDER BY to be attached if TRUE */ |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 1123 | SrcList *pSrc; /* The FROM clause */ |
drh | 9bb61fe | 2000-06-05 16:01:39 +0000 | [diff] [blame] | 1124 | Expr *pWhere; /* The WHERE clause */ |
| 1125 | ExprList *pGroupBy; /* The GROUP BY clause */ |
| 1126 | Expr *pHaving; /* The HAVING clause */ |
| 1127 | ExprList *pOrderBy; /* The ORDER BY clause */ |
drh | 967e8b7 | 2000-06-21 13:59:10 +0000 | [diff] [blame] | 1128 | Select *pPrior; /* Prior select in a compound select statement */ |
drh | 0342b1f | 2005-09-01 03:07:44 +0000 | [diff] [blame] | 1129 | Select *pRightmost; /* Right-most select in a compound select statement */ |
danielk1977 | a2dc3b1 | 2005-02-05 12:48:48 +0000 | [diff] [blame] | 1130 | Expr *pLimit; /* LIMIT expression. NULL means not used. */ |
| 1131 | Expr *pOffset; /* OFFSET expression. NULL means not used. */ |
drh | 7b58dae | 2003-07-20 01:16:46 +0000 | [diff] [blame] | 1132 | int iLimit, iOffset; /* Memory registers holding LIMIT & OFFSET counters */ |
drh | 0342b1f | 2005-09-01 03:07:44 +0000 | [diff] [blame] | 1133 | int addrOpenVirt[3]; /* OP_OpenVirtual opcodes related to this select */ |
drh | 9bb61fe | 2000-06-05 16:01:39 +0000 | [diff] [blame] | 1134 | }; |
| 1135 | |
| 1136 | /* |
drh | fef5208 | 2000-06-06 01:50:43 +0000 | [diff] [blame] | 1137 | ** The results of a select can be distributed in several ways. |
| 1138 | */ |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 1139 | #define SRT_Union 1 /* Store result as keys in an index */ |
| 1140 | #define SRT_Except 2 /* Remove result from a UNION index */ |
| 1141 | #define SRT_Discard 3 /* Do not save the results anywhere */ |
drh | fef5208 | 2000-06-06 01:50:43 +0000 | [diff] [blame] | 1142 | |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 1143 | /* The ORDER BY clause is ignored for all of the above */ |
| 1144 | #define IgnorableOrderby(X) (X<=SRT_Discard) |
| 1145 | |
| 1146 | #define SRT_Callback 4 /* Invoke a callback with each row of result */ |
| 1147 | #define SRT_Mem 5 /* Store result in a memory cell */ |
| 1148 | #define SRT_Set 6 /* Store non-null results as keys in an index */ |
drh | d49c16e | 2005-09-08 02:00:25 +0000 | [diff] [blame] | 1149 | #define SRT_Table 7 /* Store result as data with an automatic rowid */ |
| 1150 | #define SRT_VirtualTab 8 /* Create virtual table and store like SRT_Table */ |
drh | 9d2985c | 2005-09-08 01:58:42 +0000 | [diff] [blame] | 1151 | #define SRT_Subroutine 9 /* Call a subroutine to handle results */ |
| 1152 | #define SRT_Exists 10 /* Put 0 or 1 in a memory cell */ |
drh | 2282792 | 2000-06-06 17:27:05 +0000 | [diff] [blame] | 1153 | |
| 1154 | /* |
drh | f57b339 | 2001-10-08 13:22:32 +0000 | [diff] [blame] | 1155 | ** An SQL parser context. A copy of this structure is passed through |
| 1156 | ** the parser and down into all the parser action routine in order to |
| 1157 | ** carry around information that is global to the entire parse. |
drh | f197484 | 2004-11-05 03:56:00 +0000 | [diff] [blame] | 1158 | ** |
| 1159 | ** The structure is divided into two parts. When the parser and code |
| 1160 | ** generate call themselves recursively, the first part of the structure |
| 1161 | ** is constant but the second part is reset at the beginning and end of |
| 1162 | ** each recursion. |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1163 | */ |
| 1164 | struct Parse { |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1165 | sqlite3 *db; /* The main database structure */ |
drh | 4c50439 | 2000-10-16 22:06:40 +0000 | [diff] [blame] | 1166 | int rc; /* Return code from execution */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1167 | char *zErrMsg; /* An error message */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1168 | Vdbe *pVdbe; /* An engine for executing database bytecode */ |
drh | 836faa4 | 2003-01-11 13:30:57 +0000 | [diff] [blame] | 1169 | u8 colNamesSet; /* TRUE after OP_ColumnName has been issued to pVdbe */ |
drh | e0bc404 | 2002-06-25 01:09:11 +0000 | [diff] [blame] | 1170 | u8 nameClash; /* A permanent table name clashes with temp table name */ |
drh | a6ecd33 | 2004-06-10 00:29:09 +0000 | [diff] [blame] | 1171 | u8 checkSchema; /* Causes schema cookie check after an error */ |
drh | 205f48e | 2004-11-05 00:43:11 +0000 | [diff] [blame] | 1172 | u8 nested; /* Number of nested calls to the parser/code generator */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1173 | int nErr; /* Number of errors seen */ |
drh | 832508b | 2002-03-02 17:04:07 +0000 | [diff] [blame] | 1174 | int nTab; /* Number of previously allocated VDBE cursors */ |
drh | 19a775c | 2000-06-05 18:54:46 +0000 | [diff] [blame] | 1175 | int nMem; /* Number of memory cells used so far */ |
drh | fef5208 | 2000-06-06 01:50:43 +0000 | [diff] [blame] | 1176 | int nSet; /* Number of sets used so far */ |
drh | 8024205 | 2004-06-09 00:48:12 +0000 | [diff] [blame] | 1177 | u32 writeMask; /* Start a write transaction on these databases */ |
drh | fcd35c7 | 2005-05-21 02:48:08 +0000 | [diff] [blame] | 1178 | u32 cookieMask; /* Bitmask of schema verified databases */ |
| 1179 | int cookieGoto; /* Address of OP_Goto to cookie verifier subroutine */ |
| 1180 | int cookieValue[MAX_ATTACHED+2]; /* Values of cookies to verify */ |
drh | f197484 | 2004-11-05 03:56:00 +0000 | [diff] [blame] | 1181 | |
| 1182 | /* Above is constant between recursions. Below is reset before and after |
| 1183 | ** each recursion */ |
| 1184 | |
| 1185 | int nVar; /* Number of '?' variables seen in the SQL so far */ |
| 1186 | int nVarExpr; /* Number of used slots in apVarExpr[] */ |
| 1187 | int nVarExprAlloc; /* Number of allocated slots in apVarExpr[] */ |
| 1188 | Expr **apVarExpr; /* Pointers to :aaa and $aaaa wildcard expressions */ |
| 1189 | u8 explain; /* True if the EXPLAIN flag is found on the query */ |
drh | f197484 | 2004-11-05 03:56:00 +0000 | [diff] [blame] | 1190 | Token sErrToken; /* The token at which the error occurred */ |
| 1191 | Token sNameToken; /* Token with unqualified schema object name */ |
| 1192 | Token sLastToken; /* The last token parsed */ |
| 1193 | const char *zSql; /* All SQL text */ |
| 1194 | const char *zTail; /* All SQL text past the last semicolon parsed */ |
| 1195 | Table *pNewTable; /* A table being constructed by CREATE TABLE */ |
| 1196 | Trigger *pNewTrigger; /* Trigger under construct by a CREATE TRIGGER */ |
| 1197 | TriggerStack *trigStack; /* Trigger actions being coded */ |
| 1198 | const char *zAuthContext; /* The 6th parameter to db->xAuth callbacks */ |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1199 | }; |
| 1200 | |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1201 | /* |
drh | 85e2096 | 2003-04-25 17:52:11 +0000 | [diff] [blame] | 1202 | ** An instance of the following structure can be declared on a stack and used |
| 1203 | ** to save the Parse.zAuthContext value so that it can be restored later. |
| 1204 | */ |
| 1205 | struct AuthContext { |
| 1206 | const char *zAuthContext; /* Put saved Parse.zAuthContext here */ |
| 1207 | Parse *pParse; /* The Parse structure */ |
| 1208 | }; |
| 1209 | |
| 1210 | /* |
drh | f0863fe | 2005-06-12 21:35:51 +0000 | [diff] [blame] | 1211 | ** Bitfield flags for P2 value in OP_Insert and OP_Delete |
rdc | b0c374f | 2004-02-20 22:53:38 +0000 | [diff] [blame] | 1212 | */ |
| 1213 | #define OPFLAG_NCHANGE 1 /* Set to update db->nChange */ |
| 1214 | #define OPFLAG_LASTROWID 2 /* Set to update db->lastRowid */ |
rdc | b0c374f | 2004-02-20 22:53:38 +0000 | [diff] [blame] | 1215 | |
| 1216 | /* |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1217 | * Each trigger present in the database schema is stored as an instance of |
| 1218 | * struct Trigger. |
| 1219 | * |
| 1220 | * Pointers to instances of struct Trigger are stored in two ways. |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1221 | * 1. In the "trigHash" hash table (part of the sqlite3* that represents the |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1222 | * database). This allows Trigger structures to be retrieved by name. |
| 1223 | * 2. All triggers associated with a single table form a linked list, using the |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 1224 | * pNext member of struct Trigger. A pointer to the first element of the |
| 1225 | * linked list is stored as the "pTrigger" member of the associated |
| 1226 | * struct Table. |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1227 | * |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 1228 | * The "step_list" member points to the first element of a linked list |
| 1229 | * containing the SQL statements specified as the trigger program. |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1230 | */ |
danielk1977 | c3f9bad | 2002-05-15 08:30:12 +0000 | [diff] [blame] | 1231 | struct Trigger { |
drh | dc37945 | 2002-05-15 12:45:43 +0000 | [diff] [blame] | 1232 | char *name; /* The name of the trigger */ |
| 1233 | char *table; /* The table or view to which the trigger applies */ |
drh | f0f258b | 2003-04-21 18:48:45 +0000 | [diff] [blame] | 1234 | u8 iDb; /* Database containing this trigger */ |
drh | 79a519c | 2003-05-17 19:04:03 +0000 | [diff] [blame] | 1235 | u8 iTabDb; /* Database containing Trigger.table */ |
drh | f0f258b | 2003-04-21 18:48:45 +0000 | [diff] [blame] | 1236 | u8 op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT */ |
drh | dca7684 | 2004-12-07 14:06:13 +0000 | [diff] [blame] | 1237 | u8 tr_tm; /* One of TRIGGER_BEFORE, TRIGGER_AFTER */ |
drh | dc37945 | 2002-05-15 12:45:43 +0000 | [diff] [blame] | 1238 | Expr *pWhen; /* The WHEN clause of the expresion (may be NULL) */ |
| 1239 | IdList *pColumns; /* If this is an UPDATE OF <column-list> trigger, |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1240 | the <column-list> is stored here */ |
drh | dc37945 | 2002-05-15 12:45:43 +0000 | [diff] [blame] | 1241 | int foreach; /* One of TK_ROW or TK_STATEMENT */ |
drh | 4312db5 | 2003-06-03 01:47:11 +0000 | [diff] [blame] | 1242 | Token nameToken; /* Token containing zName. Use during parsing only */ |
danielk1977 | c3f9bad | 2002-05-15 08:30:12 +0000 | [diff] [blame] | 1243 | |
drh | dc37945 | 2002-05-15 12:45:43 +0000 | [diff] [blame] | 1244 | TriggerStep *step_list; /* Link list of trigger program steps */ |
drh | dc37945 | 2002-05-15 12:45:43 +0000 | [diff] [blame] | 1245 | Trigger *pNext; /* Next trigger associated with the table */ |
danielk1977 | c3f9bad | 2002-05-15 08:30:12 +0000 | [diff] [blame] | 1246 | }; |
| 1247 | |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1248 | /* |
drh | dca7684 | 2004-12-07 14:06:13 +0000 | [diff] [blame] | 1249 | ** A trigger is either a BEFORE or an AFTER trigger. The following constants |
| 1250 | ** determine which. |
| 1251 | ** |
| 1252 | ** If there are multiple triggers, you might of some BEFORE and some AFTER. |
| 1253 | ** In that cases, the constants below can be ORed together. |
| 1254 | */ |
| 1255 | #define TRIGGER_BEFORE 1 |
| 1256 | #define TRIGGER_AFTER 2 |
| 1257 | |
| 1258 | /* |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1259 | * An instance of struct TriggerStep is used to store a single SQL statement |
| 1260 | * that is a part of a trigger-program. |
| 1261 | * |
| 1262 | * Instances of struct TriggerStep are stored in a singly linked list (linked |
| 1263 | * using the "pNext" member) referenced by the "step_list" member of the |
| 1264 | * associated struct Trigger instance. The first element of the linked list is |
| 1265 | * the first step of the trigger-program. |
| 1266 | * |
| 1267 | * The "op" member indicates whether this is a "DELETE", "INSERT", "UPDATE" or |
| 1268 | * "SELECT" statement. The meanings of the other members is determined by the |
| 1269 | * value of "op" as follows: |
| 1270 | * |
| 1271 | * (op == TK_INSERT) |
| 1272 | * orconf -> stores the ON CONFLICT algorithm |
| 1273 | * pSelect -> If this is an INSERT INTO ... SELECT ... statement, then |
| 1274 | * this stores a pointer to the SELECT statement. Otherwise NULL. |
| 1275 | * target -> A token holding the name of the table to insert into. |
| 1276 | * pExprList -> If this is an INSERT INTO ... VALUES ... statement, then |
| 1277 | * this stores values to be inserted. Otherwise NULL. |
| 1278 | * pIdList -> If this is an INSERT INTO ... (<column-names>) VALUES ... |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 1279 | * statement, then this stores the column-names to be |
| 1280 | * inserted into. |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1281 | * |
| 1282 | * (op == TK_DELETE) |
| 1283 | * target -> A token holding the name of the table to delete from. |
| 1284 | * pWhere -> The WHERE clause of the DELETE statement if one is specified. |
| 1285 | * Otherwise NULL. |
| 1286 | * |
| 1287 | * (op == TK_UPDATE) |
| 1288 | * target -> A token holding the name of the table to update rows of. |
| 1289 | * pWhere -> The WHERE clause of the UPDATE statement if one is specified. |
| 1290 | * Otherwise NULL. |
| 1291 | * pExprList -> A list of the columns to update and the expressions to update |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1292 | * them to. See sqlite3Update() documentation of "pChanges" |
drh | ad3cab5 | 2002-05-24 02:04:32 +0000 | [diff] [blame] | 1293 | * argument. |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1294 | * |
| 1295 | */ |
| 1296 | struct TriggerStep { |
| 1297 | int op; /* One of TK_DELETE, TK_UPDATE, TK_INSERT, TK_SELECT */ |
| 1298 | int orconf; /* OE_Rollback etc. */ |
drh | a69d916 | 2003-04-17 22:57:53 +0000 | [diff] [blame] | 1299 | Trigger *pTrig; /* The trigger that this step is a part of */ |
danielk1977 | c3f9bad | 2002-05-15 08:30:12 +0000 | [diff] [blame] | 1300 | |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1301 | Select *pSelect; /* Valid for SELECT and sometimes |
| 1302 | INSERT steps (when pExprList == 0) */ |
| 1303 | Token target; /* Valid for DELETE, UPDATE, INSERT steps */ |
| 1304 | Expr *pWhere; /* Valid for DELETE, UPDATE steps */ |
| 1305 | ExprList *pExprList; /* Valid for UPDATE statements and sometimes |
| 1306 | INSERT steps (when pSelect == 0) */ |
| 1307 | IdList *pIdList; /* Valid for INSERT statements only */ |
| 1308 | |
| 1309 | TriggerStep * pNext; /* Next in the link-list */ |
| 1310 | }; |
| 1311 | |
| 1312 | /* |
| 1313 | * An instance of struct TriggerStack stores information required during code |
| 1314 | * generation of a single trigger program. While the trigger program is being |
| 1315 | * coded, its associated TriggerStack instance is pointed to by the |
| 1316 | * "pTriggerStack" member of the Parse structure. |
| 1317 | * |
| 1318 | * The pTab member points to the table that triggers are being coded on. The |
| 1319 | * newIdx member contains the index of the vdbe cursor that points at the temp |
| 1320 | * table that stores the new.* references. If new.* references are not valid |
| 1321 | * for the trigger being coded (for example an ON DELETE trigger), then newIdx |
| 1322 | * is set to -1. The oldIdx member is analogous to newIdx, for old.* references. |
| 1323 | * |
| 1324 | * The ON CONFLICT policy to be used for the trigger program steps is stored |
| 1325 | * as the orconf member. If this is OE_Default, then the ON CONFLICT clause |
| 1326 | * specified for individual triggers steps is used. |
| 1327 | * |
| 1328 | * struct TriggerStack has a "pNext" member, to allow linked lists to be |
| 1329 | * constructed. When coding nested triggers (triggers fired by other triggers) |
| 1330 | * each nested trigger stores its parent trigger's TriggerStack as the "pNext" |
| 1331 | * pointer. Once the nested trigger has been coded, the pNext value is restored |
| 1332 | * to the pTriggerStack member of the Parse stucture and coding of the parent |
| 1333 | * trigger continues. |
| 1334 | * |
| 1335 | * Before a nested trigger is coded, the linked list pointed to by the |
| 1336 | * pTriggerStack is scanned to ensure that the trigger is not about to be coded |
| 1337 | * recursively. If this condition is detected, the nested trigger is not coded. |
| 1338 | */ |
| 1339 | struct TriggerStack { |
| 1340 | Table *pTab; /* Table that triggers are currently being coded on */ |
| 1341 | int newIdx; /* Index of vdbe cursor to "new" temp table */ |
| 1342 | int oldIdx; /* Index of vdbe cursor to "old" temp table */ |
| 1343 | int orconf; /* Current orconf policy */ |
danielk1977 | 6f34903 | 2002-06-11 02:25:40 +0000 | [diff] [blame] | 1344 | int ignoreJump; /* where to jump to for a RAISE(IGNORE) */ |
drh | e22a334 | 2003-04-22 20:30:37 +0000 | [diff] [blame] | 1345 | Trigger *pTrigger; /* The trigger currently being coded */ |
| 1346 | TriggerStack *pNext; /* Next trigger down on the trigger stack */ |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1347 | }; |
| 1348 | |
| 1349 | /* |
drh | f26e09c | 2003-05-31 16:21:12 +0000 | [diff] [blame] | 1350 | ** The following structure contains information used by the sqliteFix... |
| 1351 | ** routines as they walk the parse tree to make database references |
| 1352 | ** explicit. |
| 1353 | */ |
| 1354 | typedef struct DbFixer DbFixer; |
| 1355 | struct DbFixer { |
| 1356 | Parse *pParse; /* The parsing context. Error messages written here */ |
| 1357 | const char *zDb; /* Make sure all objects are contained in this database */ |
| 1358 | const char *zType; /* Type of the container - used for error messages */ |
| 1359 | const Token *pName; /* Name of the container - used for error messages */ |
| 1360 | }; |
| 1361 | |
| 1362 | /* |
drh | 234c39d | 2004-07-24 03:30:47 +0000 | [diff] [blame] | 1363 | ** A pointer to this structure is used to communicate information |
| 1364 | ** from sqlite3Init and OP_ParseSchema into the sqlite3InitCallback. |
| 1365 | */ |
| 1366 | typedef struct { |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1367 | sqlite3 *db; /* The database being initialized */ |
drh | 234c39d | 2004-07-24 03:30:47 +0000 | [diff] [blame] | 1368 | char **pzErrMsg; /* Error message stored here */ |
| 1369 | } InitData; |
| 1370 | |
drh | b6c2989 | 2004-11-22 19:12:19 +0000 | [diff] [blame] | 1371 | /* |
danielk1977 | d99bc93 | 2002-05-16 00:13:12 +0000 | [diff] [blame] | 1372 | * This global flag is set for performance testing of triggers. When it is set |
| 1373 | * SQLite will perform the overhead of building new and old trigger references |
| 1374 | * even when no triggers exist |
| 1375 | */ |
drh | 38f8271 | 2004-06-18 17:10:16 +0000 | [diff] [blame] | 1376 | extern int sqlite3_always_code_trigger_setup; |
danielk1977 | c3f9bad | 2002-05-15 08:30:12 +0000 | [diff] [blame] | 1377 | |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1378 | /* |
drh | 4928570 | 2005-09-17 15:20:26 +0000 | [diff] [blame] | 1379 | ** The SQLITE_CORRUPT_BKPT macro can be either a constant (for production |
| 1380 | ** builds) or a function call (for debugging). If it is a function call, |
| 1381 | ** it allows the operator to set a breakpoint at the spot where database |
| 1382 | ** corruption is first detected. |
| 1383 | */ |
| 1384 | #ifdef SQLITE_DEBUG |
| 1385 | extern int sqlite3Corrupt(void); |
| 1386 | # define SQLITE_CORRUPT_BKPT sqlite3Corrupt() |
| 1387 | #else |
| 1388 | # define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT |
| 1389 | #endif |
| 1390 | |
| 1391 | /* |
drh | 7589723 | 2000-05-29 14:26:00 +0000 | [diff] [blame] | 1392 | ** Internal function prototypes |
| 1393 | */ |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1394 | int sqlite3StrICmp(const char *, const char *); |
| 1395 | int sqlite3StrNICmp(const char *, const char *, int); |
| 1396 | int sqlite3HashNoCase(const char *, int); |
danielk1977 | 8a6b541 | 2004-05-24 07:04:25 +0000 | [diff] [blame] | 1397 | int sqlite3IsNumber(const char*, int*, u8); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1398 | int sqlite3Compare(const char *, const char *); |
| 1399 | int sqlite3SortCompare(const char *, const char *); |
| 1400 | void sqlite3RealToSortable(double r, char *); |
danielk1977 | 2c33654 | 2005-01-13 02:14:23 +0000 | [diff] [blame] | 1401 | #ifdef SQLITE_MEMDEBUG |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1402 | void *sqlite3Malloc_(int,int,char*,int); |
| 1403 | void sqlite3Free_(void*,char*,int); |
| 1404 | void *sqlite3Realloc_(void*,int,char*,int); |
| 1405 | char *sqlite3StrDup_(const char*,char*,int); |
| 1406 | char *sqlite3StrNDup_(const char*, int,char*,int); |
| 1407 | void sqlite3CheckMemory(void*,int); |
drh | dcc581c | 2000-05-30 13:44:19 +0000 | [diff] [blame] | 1408 | #else |
drh | bdb4383 | 2004-06-18 17:45:11 +0000 | [diff] [blame] | 1409 | void *sqlite3Malloc(int); |
| 1410 | void *sqlite3MallocRaw(int); |
| 1411 | void sqlite3Free(void*); |
| 1412 | void *sqlite3Realloc(void*,int); |
| 1413 | char *sqlite3StrDup(const char*); |
| 1414 | char *sqlite3StrNDup(const char*, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1415 | # define sqlite3CheckMemory(a,b) |
drh | 132d8d6 | 2005-05-22 20:12:37 +0000 | [diff] [blame] | 1416 | # define sqlite3MallocX sqlite3Malloc |
drh | dcc581c | 2000-05-30 13:44:19 +0000 | [diff] [blame] | 1417 | #endif |
drh | 53f733c | 2005-09-16 02:38:09 +0000 | [diff] [blame] | 1418 | void sqlite3ReallocOrFree(void**,int); |
drh | 998da3a | 2004-06-19 15:22:56 +0000 | [diff] [blame] | 1419 | void sqlite3FreeX(void*); |
drh | 132d8d6 | 2005-05-22 20:12:37 +0000 | [diff] [blame] | 1420 | void *sqlite3MallocX(int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1421 | char *sqlite3MPrintf(const char*, ...); |
| 1422 | char *sqlite3VMPrintf(const char*, va_list); |
drh | e54ca3f | 2004-06-07 01:52:14 +0000 | [diff] [blame] | 1423 | void sqlite3DebugPrintf(const char*, ...); |
drh | fe63d1c | 2004-09-08 20:13:04 +0000 | [diff] [blame] | 1424 | void *sqlite3TextToPtr(const char*); |
drh | 41f5852 | 2005-06-06 15:06:39 +0000 | [diff] [blame] | 1425 | void sqlite3SetString(char **, ...); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1426 | void sqlite3ErrorMsg(Parse*, const char*, ...); |
| 1427 | void sqlite3Dequote(char*); |
drh | d2687b7 | 2005-08-12 22:56:09 +0000 | [diff] [blame] | 1428 | void sqlite3DequoteExpr(Expr*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1429 | int sqlite3KeywordCode(const char*, int); |
| 1430 | int sqlite3RunParser(Parse*, const char*, char **); |
drh | 8024205 | 2004-06-09 00:48:12 +0000 | [diff] [blame] | 1431 | void sqlite3FinishCoding(Parse*); |
drh | e4e7207 | 2004-11-23 01:47:30 +0000 | [diff] [blame] | 1432 | Expr *sqlite3Expr(int, Expr*, Expr*, const Token*); |
drh | 4e0cff6 | 2004-11-05 05:10:28 +0000 | [diff] [blame] | 1433 | Expr *sqlite3RegisterExpr(Parse*,Token*); |
drh | 91bb0ee | 2004-09-01 03:06:34 +0000 | [diff] [blame] | 1434 | Expr *sqlite3ExprAnd(Expr*, Expr*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1435 | void sqlite3ExprSpan(Expr*,Token*,Token*); |
| 1436 | Expr *sqlite3ExprFunction(ExprList*, Token*); |
drh | fa6bc00 | 2004-09-07 16:19:52 +0000 | [diff] [blame] | 1437 | void sqlite3ExprAssignVarNumber(Parse*, Expr*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1438 | void sqlite3ExprDelete(Expr*); |
| 1439 | ExprList *sqlite3ExprListAppend(ExprList*,Expr*,Token*); |
| 1440 | void sqlite3ExprListDelete(ExprList*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1441 | int sqlite3Init(sqlite3*, char**); |
drh | 234c39d | 2004-07-24 03:30:47 +0000 | [diff] [blame] | 1442 | int sqlite3InitCallback(void*, int, char**, char**); |
danielk1977 | 91cf71b | 2004-06-26 06:37:06 +0000 | [diff] [blame] | 1443 | void sqlite3Pragma(Parse*,Token*,Token*,Token*,int); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1444 | void sqlite3ResetInternalSchema(sqlite3*, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1445 | void sqlite3BeginParse(Parse*,int); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1446 | void sqlite3RollbackInternalChanges(sqlite3*); |
| 1447 | void sqlite3CommitInternalChanges(sqlite3*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1448 | Table *sqlite3ResultSetOfSelect(Parse*,char*,Select*); |
| 1449 | void sqlite3OpenMasterTable(Vdbe *v, int); |
danielk1977 | cbb18d2 | 2004-05-28 11:37:27 +0000 | [diff] [blame] | 1450 | void sqlite3StartTable(Parse*,Token*,Token*,Token*,int,int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1451 | void sqlite3AddColumn(Parse*,Token*); |
| 1452 | void sqlite3AddNotNull(Parse*, int); |
drh | 205f48e | 2004-11-05 00:43:11 +0000 | [diff] [blame] | 1453 | void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int); |
drh | 487e262 | 2005-06-25 18:42:14 +0000 | [diff] [blame] | 1454 | void sqlite3AddColumnType(Parse*,Token*); |
danielk1977 | 7977a17 | 2004-11-09 12:44:37 +0000 | [diff] [blame] | 1455 | void sqlite3AddDefaultValue(Parse*,Expr*); |
drh | d3d39e9 | 2004-05-20 22:16:29 +0000 | [diff] [blame] | 1456 | void sqlite3AddCollateType(Parse*, const char*, int); |
danielk1977 | 19a8e7e | 2005-03-17 05:03:38 +0000 | [diff] [blame] | 1457 | void sqlite3EndTable(Parse*,Token*,Token*,Select*); |
drh | b7f9164 | 2004-10-31 02:22:47 +0000 | [diff] [blame] | 1458 | |
| 1459 | #ifndef SQLITE_OMIT_VIEW |
| 1460 | void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int); |
| 1461 | int sqlite3ViewGetColumnNames(Parse*,Table*); |
| 1462 | #else |
| 1463 | # define sqlite3ViewGetColumnNames(A,B) 0 |
| 1464 | #endif |
| 1465 | |
danielk1977 | a885810 | 2004-05-28 12:11:21 +0000 | [diff] [blame] | 1466 | void sqlite3DropTable(Parse*, SrcList*, int); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1467 | void sqlite3DeleteTable(sqlite3*, Table*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1468 | void sqlite3Insert(Parse*, SrcList*, ExprList*, Select*, IdList*, int); |
drh | 1344989 | 2005-09-07 21:22:45 +0000 | [diff] [blame] | 1469 | int sqlite3ArrayAllocate(void**,int,int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1470 | IdList *sqlite3IdListAppend(IdList*, Token*); |
| 1471 | int sqlite3IdListIndex(IdList*,const char*); |
| 1472 | SrcList *sqlite3SrcListAppend(SrcList*, Token*, Token*); |
| 1473 | void sqlite3SrcListAddAlias(SrcList*, Token*); |
| 1474 | void sqlite3SrcListAssignCursors(Parse*, SrcList*); |
| 1475 | void sqlite3IdListDelete(IdList*); |
| 1476 | void sqlite3SrcListDelete(SrcList*); |
danielk1977 | 0202b29 | 2004-06-09 09:55:16 +0000 | [diff] [blame] | 1477 | void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*, |
danielk1977 | ef2cb63 | 2004-05-29 02:37:19 +0000 | [diff] [blame] | 1478 | Token*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1479 | void sqlite3DropIndex(Parse*, SrcList*); |
| 1480 | void sqlite3AddKeyType(Vdbe*, ExprList*); |
| 1481 | void sqlite3AddIdxKeyType(Vdbe*, Index*); |
danielk1977 | b3bce66 | 2005-01-29 08:32:43 +0000 | [diff] [blame] | 1482 | int sqlite3Select(Parse*, Select*, int, int, Select*, int, int*, char *aff); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1483 | Select *sqlite3SelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*, |
danielk1977 | a2dc3b1 | 2005-02-05 12:48:48 +0000 | [diff] [blame] | 1484 | int,Expr*,Expr*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1485 | void sqlite3SelectDelete(Select*); |
| 1486 | void sqlite3SelectUnbind(Select*); |
| 1487 | Table *sqlite3SrcListLookup(Parse*, SrcList*); |
| 1488 | int sqlite3IsReadOnly(Parse*, Table*, int); |
drh | ad6d946 | 2004-09-19 02:15:24 +0000 | [diff] [blame] | 1489 | void sqlite3OpenTableForReading(Vdbe*, int iCur, Table*); |
drh | b6c2989 | 2004-11-22 19:12:19 +0000 | [diff] [blame] | 1490 | void sqlite3OpenTable(Vdbe*, int iCur, Table*, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1491 | void sqlite3DeleteFrom(Parse*, SrcList*, Expr*); |
| 1492 | void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int); |
drh | f8db1bc | 2005-04-22 02:38:37 +0000 | [diff] [blame] | 1493 | WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1494 | void sqlite3WhereEnd(WhereInfo*); |
| 1495 | void sqlite3ExprCode(Parse*, Expr*); |
drh | 2530378 | 2004-12-07 15:41:48 +0000 | [diff] [blame] | 1496 | void sqlite3ExprCodeAndCache(Parse*, Expr*); |
drh | f9b596e | 2004-05-26 16:54:42 +0000 | [diff] [blame] | 1497 | int sqlite3ExprCodeExprList(Parse*, ExprList*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1498 | void sqlite3ExprIfTrue(Parse*, Expr*, int, int); |
| 1499 | void sqlite3ExprIfFalse(Parse*, Expr*, int, int); |
drh | 205f48e | 2004-11-05 00:43:11 +0000 | [diff] [blame] | 1500 | void sqlite3NextedParse(Parse*, const char*, ...); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1501 | Table *sqlite3FindTable(sqlite3*,const char*, const char*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1502 | Table *sqlite3LocateTable(Parse*,const char*, const char*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1503 | Index *sqlite3FindIndex(sqlite3*,const char*, const char*); |
| 1504 | void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*); |
| 1505 | void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1506 | void sqlite3Vacuum(Parse*, Token*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1507 | int sqlite3RunVacuum(char**, sqlite3*); |
drh | a99db3b | 2004-06-19 14:49:12 +0000 | [diff] [blame] | 1508 | char *sqlite3NameFromToken(Token*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1509 | int sqlite3ExprCheck(Parse*, Expr*, int, int*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1510 | int sqlite3ExprCompare(Expr*, Expr*); |
drh | cce7d17 | 2000-05-31 15:34:51 +0000 | [diff] [blame] | 1511 | int sqliteFuncId(Token*); |
danielk1977 | b3bce66 | 2005-01-29 08:32:43 +0000 | [diff] [blame] | 1512 | int sqlite3ExprResolveNames(NameContext *, Expr *); |
danielk1977 | a58fdfb | 2005-02-08 07:50:40 +0000 | [diff] [blame] | 1513 | int sqlite3ExprAnalyzeAggregates(NameContext*, Expr*); |
drh | 5d9a4af | 2005-08-30 00:54:01 +0000 | [diff] [blame] | 1514 | int sqlite3ExprAnalyzeAggList(NameContext*,ExprList*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1515 | Vdbe *sqlite3GetVdbe(Parse*); |
| 1516 | void sqlite3Randomness(int, void*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1517 | void sqlite3RollbackAll(sqlite3*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1518 | void sqlite3CodeVerifySchema(Parse*, int); |
drh | 684917c | 2004-10-05 02:41:42 +0000 | [diff] [blame] | 1519 | void sqlite3BeginTransaction(Parse*, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1520 | void sqlite3CommitTransaction(Parse*); |
| 1521 | void sqlite3RollbackTransaction(Parse*); |
| 1522 | int sqlite3ExprIsConstant(Expr*); |
drh | eb55bd2 | 2005-06-30 17:04:21 +0000 | [diff] [blame] | 1523 | int sqlite3ExprIsConstantOrFunction(Expr*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1524 | int sqlite3ExprIsInteger(Expr*, int*); |
| 1525 | int sqlite3IsRowid(const char*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1526 | void sqlite3GenerateRowDelete(sqlite3*, Vdbe*, Table*, int, int); |
| 1527 | void sqlite3GenerateRowIndexDelete(sqlite3*, Vdbe*, Table*, int, char*); |
drh | 51846b5 | 2004-05-28 16:00:21 +0000 | [diff] [blame] | 1528 | void sqlite3GenerateIndexKey(Vdbe*, Index*, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1529 | void sqlite3GenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int); |
| 1530 | void sqlite3CompleteInsertion(Parse*, Table*, int, char*, int, int, int); |
drh | 290c194 | 2004-08-21 17:54:45 +0000 | [diff] [blame] | 1531 | void sqlite3OpenTableAndIndices(Parse*, Table*, int, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1532 | void sqlite3BeginWriteOperation(Parse*, int, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1533 | Expr *sqlite3ExprDup(Expr*); |
| 1534 | void sqlite3TokenCopy(Token*, Token*); |
| 1535 | ExprList *sqlite3ExprListDup(ExprList*); |
| 1536 | SrcList *sqlite3SrcListDup(SrcList*); |
| 1537 | IdList *sqlite3IdListDup(IdList*); |
| 1538 | Select *sqlite3SelectDup(Select*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1539 | FuncDef *sqlite3FindFunction(sqlite3*,const char*,int,int,u8,int); |
| 1540 | void sqlite3RegisterBuiltinFunctions(sqlite3*); |
| 1541 | void sqlite3RegisterDateTimeFunctions(sqlite3*); |
| 1542 | int sqlite3SafetyOn(sqlite3*); |
| 1543 | int sqlite3SafetyOff(sqlite3*); |
| 1544 | int sqlite3SafetyCheck(sqlite3*); |
| 1545 | void sqlite3ChangeCookie(sqlite3*, Vdbe*, int); |
drh | b7f9164 | 2004-10-31 02:22:47 +0000 | [diff] [blame] | 1546 | |
| 1547 | #ifndef SQLITE_OMIT_TRIGGER |
| 1548 | void sqlite3BeginTrigger(Parse*, Token*,Token*,int,int,IdList*,SrcList*, |
| 1549 | int,Expr*,int); |
| 1550 | void sqlite3FinishTrigger(Parse*, TriggerStep*, Token*); |
| 1551 | void sqlite3DropTrigger(Parse*, SrcList*); |
| 1552 | void sqlite3DropTriggerPtr(Parse*, Trigger*, int); |
drh | dca7684 | 2004-12-07 14:06:13 +0000 | [diff] [blame] | 1553 | int sqlite3TriggersExist(Parse*, Table*, int, ExprList*); |
drh | b7f9164 | 2004-10-31 02:22:47 +0000 | [diff] [blame] | 1554 | int sqlite3CodeRowTrigger(Parse*, int, ExprList*, int, Table *, int, int, |
| 1555 | int, int); |
| 1556 | void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*); |
| 1557 | void sqlite3DeleteTriggerStep(TriggerStep*); |
| 1558 | TriggerStep *sqlite3TriggerSelectStep(Select*); |
| 1559 | TriggerStep *sqlite3TriggerInsertStep(Token*, IdList*, ExprList*,Select*,int); |
| 1560 | TriggerStep *sqlite3TriggerUpdateStep(Token*, ExprList*, Expr*, int); |
| 1561 | TriggerStep *sqlite3TriggerDeleteStep(Token*, Expr*); |
| 1562 | void sqlite3DeleteTrigger(Trigger*); |
| 1563 | void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*); |
| 1564 | #else |
| 1565 | # define sqlite3TriggersExist(A,B,C,D,E,F) 0 |
| 1566 | # define sqlite3DeleteTrigger(A) |
| 1567 | # define sqlite3DropTriggerPtr(A,B,C) |
| 1568 | # define sqlite3UnlinkAndDeleteTrigger(A,B,C) |
| 1569 | # define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I) 0 |
| 1570 | #endif |
| 1571 | |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1572 | int sqlite3JoinType(Parse*, Token*, Token*, Token*); |
danielk1977 | 0202b29 | 2004-06-09 09:55:16 +0000 | [diff] [blame] | 1573 | void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1574 | void sqlite3DeferForeignKey(Parse*, int); |
drh | ed6c867 | 2003-01-12 18:02:16 +0000 | [diff] [blame] | 1575 | #ifndef SQLITE_OMIT_AUTHORIZATION |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1576 | void sqlite3AuthRead(Parse*,Expr*,SrcList*); |
| 1577 | int sqlite3AuthCheck(Parse*,int, const char*, const char*, const char*); |
| 1578 | void sqlite3AuthContextPush(Parse*, AuthContext*, const char*); |
| 1579 | void sqlite3AuthContextPop(AuthContext*); |
drh | ed6c867 | 2003-01-12 18:02:16 +0000 | [diff] [blame] | 1580 | #else |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1581 | # define sqlite3AuthRead(a,b,c) |
| 1582 | # define sqlite3AuthCheck(a,b,c,d,e) SQLITE_OK |
| 1583 | # define sqlite3AuthContextPush(a,b,c) |
| 1584 | # define sqlite3AuthContextPop(a) ((void)(a)) |
drh | ed6c867 | 2003-01-12 18:02:16 +0000 | [diff] [blame] | 1585 | #endif |
drh | 25d6543 | 2004-07-22 15:02:25 +0000 | [diff] [blame] | 1586 | void sqlite3Attach(Parse*, Token*, Token*, int, Token*); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1587 | void sqlite3Detach(Parse*, Token*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1588 | int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename, |
drh | 90f5ecb | 2004-07-22 01:19:35 +0000 | [diff] [blame] | 1589 | int omitJournal, int nCache, Btree **ppBtree); |
danielk1977 | 4adee20 | 2004-05-08 08:23:19 +0000 | [diff] [blame] | 1590 | int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*); |
| 1591 | int sqlite3FixSrcList(DbFixer*, SrcList*); |
| 1592 | int sqlite3FixSelect(DbFixer*, Select*); |
| 1593 | int sqlite3FixExpr(DbFixer*, Expr*); |
| 1594 | int sqlite3FixExprList(DbFixer*, ExprList*); |
| 1595 | int sqlite3FixTriggerStep(DbFixer*, TriggerStep*); |
drh | 487e262 | 2005-06-25 18:42:14 +0000 | [diff] [blame] | 1596 | int sqlite3AtoF(const char *z, double*); |
danielk1977 | 6f8a503 | 2004-05-10 10:34:51 +0000 | [diff] [blame] | 1597 | char *sqlite3_snprintf(int,char*,const char*,...); |
drh | fec19aa | 2004-05-19 20:41:03 +0000 | [diff] [blame] | 1598 | int sqlite3GetInt32(const char *, int*); |
drh | fec19aa | 2004-05-19 20:41:03 +0000 | [diff] [blame] | 1599 | int sqlite3FitsIn64Bits(const char *); |
danielk1977 | 6622cce | 2004-05-20 11:00:52 +0000 | [diff] [blame] | 1600 | int sqlite3utf16ByteLen(const void *pData, int nChar); |
| 1601 | int sqlite3utf8CharLen(const char *pData, int nByte); |
drh | 4e5ffc5 | 2004-08-31 00:52:37 +0000 | [diff] [blame] | 1602 | int sqlite3ReadUtf8(const unsigned char *); |
danielk1977 | 192ac1d | 2004-05-10 07:17:30 +0000 | [diff] [blame] | 1603 | int sqlite3PutVarint(unsigned char *, u64); |
danielk1977 | 90e4d95 | 2004-05-10 10:05:53 +0000 | [diff] [blame] | 1604 | int sqlite3GetVarint(const unsigned char *, u64 *); |
drh | 6d2fb15 | 2004-05-14 16:50:06 +0000 | [diff] [blame] | 1605 | int sqlite3GetVarint32(const unsigned char *, u32 *); |
danielk1977 | 192ac1d | 2004-05-10 07:17:30 +0000 | [diff] [blame] | 1606 | int sqlite3VarintLen(u64 v); |
danielk1977 | a37cdde | 2004-05-16 11:15:36 +0000 | [diff] [blame] | 1607 | void sqlite3IndexAffinityStr(Vdbe *, Index *); |
| 1608 | void sqlite3TableAffinityStr(Vdbe *, Table *); |
danielk1977 | e014a83 | 2004-05-17 10:48:57 +0000 | [diff] [blame] | 1609 | char sqlite3CompareAffinity(Expr *pExpr, char aff2); |
danielk1977 | e014a83 | 2004-05-17 10:48:57 +0000 | [diff] [blame] | 1610 | int sqlite3IndexAffinityOk(Expr *pExpr, char idx_affinity); |
danielk1977 | bf3b721 | 2004-05-18 10:06:24 +0000 | [diff] [blame] | 1611 | char sqlite3ExprAffinity(Expr *pExpr); |
drh | eb2e176 | 2004-05-27 01:53:56 +0000 | [diff] [blame] | 1612 | int sqlite3atoi64(const char*, i64*); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1613 | void sqlite3Error(sqlite3*, int, const char*,...); |
danielk1977 | cbb18d2 | 2004-05-28 11:37:27 +0000 | [diff] [blame] | 1614 | void *sqlite3HexToBlob(const char *z); |
danielk1977 | ef2cb63 | 2004-05-29 02:37:19 +0000 | [diff] [blame] | 1615 | int sqlite3TwoPartName(Parse *, Token *, Token *, Token **); |
danielk1977 | f20b21c | 2004-05-31 23:56:42 +0000 | [diff] [blame] | 1616 | const char *sqlite3ErrStr(int); |
danielk1977 | d02eb1f | 2004-06-06 09:44:03 +0000 | [diff] [blame] | 1617 | int sqlite3ReadUniChar(const char *zStr, int *pOffset, u8 *pEnc, int fold); |
danielk1977 | 8a41449 | 2004-06-29 08:59:35 +0000 | [diff] [blame] | 1618 | int sqlite3ReadSchema(Parse *pParse); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1619 | CollSeq *sqlite3FindCollSeq(sqlite3*,u8 enc, const char *,int,int); |
danielk1977 | 0202b29 | 2004-06-09 09:55:16 +0000 | [diff] [blame] | 1620 | CollSeq *sqlite3LocateCollSeq(Parse *pParse, const char *zName, int nName); |
danielk1977 | 7cedc8d | 2004-06-10 10:50:08 +0000 | [diff] [blame] | 1621 | CollSeq *sqlite3ExprCollSeq(Parse *pParse, Expr *pExpr); |
| 1622 | int sqlite3CheckCollSeq(Parse *, CollSeq *); |
| 1623 | int sqlite3CheckIndexCollSeq(Parse *, Index *); |
danielk1977 | d812336 | 2004-06-12 09:25:12 +0000 | [diff] [blame] | 1624 | int sqlite3CheckObjectName(Parse *, const char *); |
danielk1977 | b28af71 | 2004-06-21 06:50:26 +0000 | [diff] [blame] | 1625 | void sqlite3VdbeSetChanges(sqlite3 *, int); |
danielk1977 | f461889 | 2004-06-28 13:09:11 +0000 | [diff] [blame] | 1626 | void sqlite3utf16Substr(sqlite3_context *,int,sqlite3_value **); |
danielk1977 | 4e6af13 | 2004-06-10 14:01:08 +0000 | [diff] [blame] | 1627 | |
| 1628 | const void *sqlite3ValueText(sqlite3_value*, u8); |
| 1629 | int sqlite3ValueBytes(sqlite3_value*, u8); |
danielk1977 | bfd6cce | 2004-06-18 04:24:54 +0000 | [diff] [blame] | 1630 | void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, void(*)(void*)); |
danielk1977 | 4e6af13 | 2004-06-10 14:01:08 +0000 | [diff] [blame] | 1631 | void sqlite3ValueFree(sqlite3_value*); |
drh | 4f26bb6 | 2005-09-08 14:17:20 +0000 | [diff] [blame] | 1632 | sqlite3_value *sqlite3ValueNew(void); |
drh | 9bb575f | 2004-09-06 17:24:11 +0000 | [diff] [blame] | 1633 | sqlite3_value *sqlite3GetTransientValue(sqlite3*db); |
danielk1977 | aee18ef | 2005-03-09 12:26:50 +0000 | [diff] [blame] | 1634 | int sqlite3ValueFromExpr(Expr *, u8, u8, sqlite3_value **); |
| 1635 | void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); |
drh | 4e5ffc5 | 2004-08-31 00:52:37 +0000 | [diff] [blame] | 1636 | extern const unsigned char sqlite3UpperToLower[]; |
danielk1977 | a0bf265 | 2004-11-04 14:30:04 +0000 | [diff] [blame] | 1637 | void sqlite3RootPageMoved(Db*, int, int); |
drh | 4343fea | 2004-11-05 23:46:15 +0000 | [diff] [blame] | 1638 | void sqlite3Reindex(Parse*, Token*, Token*); |
drh | 1f01ec1 | 2005-02-15 21:36:18 +0000 | [diff] [blame] | 1639 | void sqlite3AlterFunctions(sqlite3*); |
danielk1977 | 9fd2a9a | 2004-11-12 13:42:30 +0000 | [diff] [blame] | 1640 | void sqlite3AlterRenameTable(Parse*, SrcList*, Token*); |
| 1641 | int sqlite3GetToken(const unsigned char *, int *); |
drh | 2958a4e | 2004-11-12 03:56:15 +0000 | [diff] [blame] | 1642 | void sqlite3NestedParse(Parse*, const char*, ...); |
drh | d89bd00 | 2005-01-22 03:03:54 +0000 | [diff] [blame] | 1643 | void sqlite3ExpirePreparedStatements(sqlite3*); |
danielk1977 | b3bce66 | 2005-01-29 08:32:43 +0000 | [diff] [blame] | 1644 | void sqlite3CodeSubselect(Parse *, Expr *); |
| 1645 | int sqlite3SelectResolve(Parse *, Select *, NameContext *); |
danielk1977 | aee18ef | 2005-03-09 12:26:50 +0000 | [diff] [blame] | 1646 | void sqlite3ColumnDefault(Vdbe *, Table *, int); |
danielk1977 | 19a8e7e | 2005-03-17 05:03:38 +0000 | [diff] [blame] | 1647 | void sqlite3AlterFinishAddColumn(Parse *, Token *); |
| 1648 | void sqlite3AlterBeginAddColumn(Parse *, SrcList *); |
drh | 2e66f0b | 2005-04-28 17:18:48 +0000 | [diff] [blame] | 1649 | const char *sqlite3TestErrorName(int); |
danielk1977 | 4dade03 | 2005-05-25 10:45:10 +0000 | [diff] [blame] | 1650 | CollSeq *sqlite3GetCollSeq(sqlite3*, CollSeq *, const char *, int); |
drh | 487e262 | 2005-06-25 18:42:14 +0000 | [diff] [blame] | 1651 | char sqlite3AffinityType(const Token*); |
drh | 9f18e8a | 2005-07-08 12:13:04 +0000 | [diff] [blame] | 1652 | void sqlite3Analyze(Parse*, Token*, Token*); |
drh | a4afb65 | 2005-07-09 02:16:02 +0000 | [diff] [blame] | 1653 | int sqlite3InvokeBusyHandler(BusyHandler*); |
drh | ff2d5ea | 2005-07-23 00:41:48 +0000 | [diff] [blame] | 1654 | int sqlite3FindDb(sqlite3*, Token*); |
drh | 497e446 | 2005-07-23 03:18:40 +0000 | [diff] [blame] | 1655 | void sqlite3AnalysisLoad(sqlite3*,int iDB); |
drh | 51147ba | 2005-07-23 22:59:55 +0000 | [diff] [blame] | 1656 | void sqlite3DefaultRowEst(Index*); |
drh | 55ef4d9 | 2005-08-14 01:20:37 +0000 | [diff] [blame] | 1657 | void sqlite3RegisterLikeFunctions(sqlite3*, int); |
drh | d64fe2f | 2005-08-28 17:00:23 +0000 | [diff] [blame] | 1658 | int sqlite3IsLikeFunction(sqlite3*,Expr*,int*,char*); |
danielk1977 | e302663 | 2004-06-22 11:29:02 +0000 | [diff] [blame] | 1659 | |
danielk1977 | fd9a0a4 | 2005-05-24 12:01:00 +0000 | [diff] [blame] | 1660 | #ifdef SQLITE_SSE |
| 1661 | #include "sseInt.h" |
| 1662 | #endif |
| 1663 | |
danielk1977 | e302663 | 2004-06-22 11:29:02 +0000 | [diff] [blame] | 1664 | #endif |