danielk1977 | 9afe684 | 2008-06-24 11:21:20 +0000 | [diff] [blame] | 1 | # 2008 June 24 |
| 2 | # |
| 3 | # The author disclaims copyright to this source code. In place of |
| 4 | # a legal notice, here is a blessing: |
| 5 | # |
| 6 | # May you do good and not evil. |
| 7 | # May you find forgiveness for yourself and forgive others. |
| 8 | # May you share freely, never taking more than you give. |
| 9 | # |
| 10 | #*********************************************************************** |
| 11 | # This file implements regression tests for SQLite library. |
| 12 | # |
danielk1977 | 4b86ef1 | 2008-07-01 14:39:35 +0000 | [diff] [blame] | 13 | # $Id: select9.test,v 1.4 2008/07/01 14:39:35 danielk1977 Exp $ |
danielk1977 | 9afe684 | 2008-06-24 11:21:20 +0000 | [diff] [blame] | 14 | |
| 15 | # The tests in this file are focused on test compound SELECT statements |
| 16 | # that have any or all of an ORDER BY, LIMIT or OFFSET clauses. As of |
| 17 | # version 3.6.0, SQLite contains code to use SQL indexes where possible |
| 18 | # to optimize such statements. |
| 19 | # |
| 20 | |
| 21 | # TODO Points: |
| 22 | # |
| 23 | # * Are there any "column affinity" issues to consider? |
| 24 | |
| 25 | set testdir [file dirname $argv0] |
| 26 | source $testdir/tester.tcl |
| 27 | |
| 28 | #------------------------------------------------------------------------- |
| 29 | # test_compound_select TESTNAME SELECT RESULT |
| 30 | # |
| 31 | # This command is used to run multiple LIMIT/OFFSET test cases based on |
| 32 | # the single SELECT statement passed as the second argument. The SELECT |
| 33 | # statement may not contain a LIMIT or OFFSET clause. This proc tests |
| 34 | # many statements of the form: |
| 35 | # |
| 36 | # "$SELECT limit $X offset $Y" |
| 37 | # |
| 38 | # for various values of $X and $Y. |
| 39 | # |
| 40 | # The third argument, $RESULT, should contain the expected result of |
| 41 | # the command [execsql $SELECT]. |
| 42 | # |
| 43 | # The first argument, $TESTNAME, is used as the base test case name to |
| 44 | # pass to [do_test] for each individual LIMIT OFFSET test case. |
| 45 | # |
| 46 | proc test_compound_select {testname sql result} { |
| 47 | |
| 48 | set nCol 1 |
| 49 | db eval $sql A { |
| 50 | set nCol [llength $A(*)] |
| 51 | break |
| 52 | } |
| 53 | set nRow [expr {[llength $result] / $nCol}] |
| 54 | |
| 55 | set ::compound_sql $sql |
| 56 | do_test $testname { |
| 57 | execsql $::compound_sql |
| 58 | } $result |
| 59 | #return |
| 60 | |
| 61 | set iLimitIncr 1 |
danielk1977 | 9afe684 | 2008-06-24 11:21:20 +0000 | [diff] [blame] | 62 | set iOffsetIncr 1 |
dan | 430e74c | 2010-06-07 17:47:26 +0000 | [diff] [blame] | 63 | if {[info exists ::G(isquick)] && $::G(isquick) && $nRow>=5} { |
danielk1977 | 6fb6444 | 2008-06-24 15:39:43 +0000 | [diff] [blame] | 64 | set iOffsetIncr [expr $nRow / 5] |
| 65 | set iLimitIncr [expr $nRow / 5] |
| 66 | } |
danielk1977 | 9afe684 | 2008-06-24 11:21:20 +0000 | [diff] [blame] | 67 | |
danielk1977 | 6fb6444 | 2008-06-24 15:39:43 +0000 | [diff] [blame] | 68 | set iLimitEnd [expr $nRow+$iLimitIncr] |
| 69 | set iOffsetEnd [expr $nRow+$iOffsetIncr] |
| 70 | |
| 71 | for {set iOffset 0} {$iOffset < $iOffsetEnd} {incr iOffset $iOffsetIncr} { |
| 72 | for {set iLimit 0} {$iLimit < $iLimitEnd} {incr iLimit} { |
danielk1977 | 9afe684 | 2008-06-24 11:21:20 +0000 | [diff] [blame] | 73 | |
| 74 | set ::compound_sql "$sql LIMIT $iLimit" |
| 75 | if {$iOffset != 0} { |
| 76 | append ::compound_sql " OFFSET $iOffset" |
| 77 | } |
| 78 | |
| 79 | set iStart [expr {$iOffset*$nCol}] |
| 80 | set iEnd [expr {($iOffset*$nCol) + ($iLimit*$nCol) -1}] |
| 81 | |
| 82 | do_test $testname.limit=$iLimit.offset=$iOffset { |
| 83 | execsql $::compound_sql |
| 84 | } [lrange $result $iStart $iEnd] |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | #------------------------------------------------------------------------- |
| 90 | # test_compound_select_flippable TESTNAME SELECT RESULT |
| 91 | # |
| 92 | # This command is for testing statements of the form: |
| 93 | # |
| 94 | # <simple select 1> <compound op> <simple select 2> ORDER BY <order by> |
| 95 | # |
| 96 | # where each <simple select> is a simple (non-compound) select statement |
| 97 | # and <compound op> is one of "INTERSECT", "UNION ALL" or "UNION". |
| 98 | # |
| 99 | # This proc calls [test_compound_select] twice, once with the select |
| 100 | # statement as it is passed to this command, and once with the positions |
| 101 | # of <select statement 1> and <select statement 2> exchanged. |
| 102 | # |
| 103 | proc test_compound_select_flippable {testname sql result} { |
| 104 | test_compound_select $testname $sql $result |
| 105 | |
| 106 | set select [string trim $sql] |
| 107 | set RE {(.*)(UNION ALL|INTERSECT|UNION)(.*)(ORDER BY.*)} |
| 108 | set rc [regexp $RE $select -> s1 op s2 order_by] |
| 109 | if {!$rc} {error "Statement is unflippable: $select"} |
| 110 | |
| 111 | set flipsql "$s2 $op $s1 $order_by" |
| 112 | test_compound_select $testname.flipped $flipsql $result |
| 113 | } |
| 114 | |
| 115 | ############################################################################# |
| 116 | # Begin tests. |
| 117 | # |
| 118 | |
| 119 | # Create and populate a sample database. |
| 120 | # |
| 121 | do_test select9-1.0 { |
| 122 | execsql { |
| 123 | CREATE TABLE t1(a, b, c); |
| 124 | CREATE TABLE t2(d, e, f); |
| 125 | BEGIN; |
| 126 | INSERT INTO t1 VALUES(1, 'one', 'I'); |
| 127 | INSERT INTO t1 VALUES(3, NULL, NULL); |
| 128 | INSERT INTO t1 VALUES(5, 'five', 'V'); |
| 129 | INSERT INTO t1 VALUES(7, 'seven', 'VII'); |
| 130 | INSERT INTO t1 VALUES(9, NULL, NULL); |
| 131 | INSERT INTO t1 VALUES(2, 'two', 'II'); |
| 132 | INSERT INTO t1 VALUES(4, 'four', 'IV'); |
| 133 | INSERT INTO t1 VALUES(6, NULL, NULL); |
| 134 | INSERT INTO t1 VALUES(8, 'eight', 'VIII'); |
| 135 | INSERT INTO t1 VALUES(10, 'ten', 'X'); |
| 136 | |
| 137 | INSERT INTO t2 VALUES(1, 'two', 'IV'); |
| 138 | INSERT INTO t2 VALUES(2, 'four', 'VIII'); |
| 139 | INSERT INTO t2 VALUES(3, NULL, NULL); |
| 140 | INSERT INTO t2 VALUES(4, 'eight', 'XVI'); |
| 141 | INSERT INTO t2 VALUES(5, 'ten', 'XX'); |
| 142 | INSERT INTO t2 VALUES(6, NULL, NULL); |
| 143 | INSERT INTO t2 VALUES(7, 'fourteen', 'XXVIII'); |
| 144 | INSERT INTO t2 VALUES(8, 'sixteen', 'XXXII'); |
| 145 | INSERT INTO t2 VALUES(9, NULL, NULL); |
| 146 | INSERT INTO t2 VALUES(10, 'twenty', 'XL'); |
| 147 | |
| 148 | COMMIT; |
| 149 | } |
| 150 | } {} |
| 151 | |
| 152 | # Each iteration of this loop runs the same tests with a different set |
| 153 | # of indexes present within the database schema. The data returned by |
| 154 | # the compound SELECT statements in the test cases should be the same |
| 155 | # in each case. |
| 156 | # |
| 157 | set iOuterLoop 1 |
| 158 | foreach indexes [list { |
| 159 | /* Do not create any indexes. */ |
| 160 | } { |
| 161 | CREATE INDEX i1 ON t1(a) |
| 162 | } { |
| 163 | CREATE INDEX i2 ON t1(b) |
| 164 | } { |
| 165 | CREATE INDEX i3 ON t2(d) |
| 166 | } { |
| 167 | CREATE INDEX i4 ON t2(e) |
| 168 | }] { |
| 169 | |
| 170 | do_test select9-1.$iOuterLoop.1 { |
| 171 | execsql $indexes |
| 172 | } {} |
| 173 | |
| 174 | # Test some 2-way UNION ALL queries. No WHERE clauses. |
| 175 | # |
| 176 | test_compound_select select9-1.$iOuterLoop.2 { |
| 177 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 |
| 178 | } {1 one 3 {} 5 five 7 seven 9 {} 2 two 4 four 6 {} 8 eight 10 ten 1 two 2 four 3 {} 4 eight 5 ten 6 {} 7 fourteen 8 sixteen 9 {} 10 twenty} |
| 179 | test_compound_select select9-1.$iOuterLoop.3 { |
| 180 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 1 |
| 181 | } {1 one 1 two 2 two 2 four 3 {} 3 {} 4 four 4 eight 5 five 5 ten 6 {} 6 {} 7 seven 7 fourteen 8 eight 8 sixteen 9 {} 9 {} 10 ten 10 twenty} |
| 182 | test_compound_select select9-1.$iOuterLoop.4 { |
| 183 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 2 |
| 184 | } {3 {} 9 {} 6 {} 3 {} 6 {} 9 {} 8 eight 4 eight 5 five 4 four 2 four 7 fourteen 1 one 7 seven 8 sixteen 10 ten 5 ten 10 twenty 2 two 1 two} |
| 185 | test_compound_select_flippable select9-1.$iOuterLoop.5 { |
| 186 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 1, 2 |
| 187 | } {1 one 1 two 2 four 2 two 3 {} 3 {} 4 eight 4 four 5 five 5 ten 6 {} 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 9 {} 10 ten 10 twenty} |
| 188 | test_compound_select_flippable select9-1.$iOuterLoop.6 { |
| 189 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 2, 1 |
| 190 | } {3 {} 3 {} 6 {} 6 {} 9 {} 9 {} 4 eight 8 eight 5 five 2 four 4 four 7 fourteen 1 one 7 seven 8 sixteen 5 ten 10 ten 10 twenty 1 two 2 two} |
| 191 | |
| 192 | # Test some 2-way UNION queries. |
| 193 | # |
| 194 | test_compound_select select9-1.$iOuterLoop.7 { |
| 195 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 |
| 196 | } {1 one 1 two 2 four 2 two 3 {} 4 eight 4 four 5 five 5 ten 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 10 ten 10 twenty} |
| 197 | |
| 198 | test_compound_select select9-1.$iOuterLoop.8 { |
| 199 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 1 |
| 200 | } {1 one 1 two 2 four 2 two 3 {} 4 eight 4 four 5 five 5 ten 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 10 ten 10 twenty} |
| 201 | |
| 202 | test_compound_select select9-1.$iOuterLoop.9 { |
| 203 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 2 |
| 204 | } {3 {} 6 {} 9 {} 4 eight 8 eight 5 five 2 four 4 four 7 fourteen 1 one 7 seven 8 sixteen 5 ten 10 ten 10 twenty 1 two 2 two} |
| 205 | |
| 206 | test_compound_select_flippable select9-1.$iOuterLoop.10 { |
| 207 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 1, 2 |
| 208 | } {1 one 1 two 2 four 2 two 3 {} 4 eight 4 four 5 five 5 ten 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 10 ten 10 twenty} |
| 209 | |
| 210 | test_compound_select_flippable select9-1.$iOuterLoop.11 { |
| 211 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 2, 1 |
| 212 | } {3 {} 6 {} 9 {} 4 eight 8 eight 5 five 2 four 4 four 7 fourteen 1 one 7 seven 8 sixteen 5 ten 10 ten 10 twenty 1 two 2 two} |
| 213 | |
| 214 | # Test some 2-way INTERSECT queries. |
| 215 | # |
| 216 | test_compound_select select9-1.$iOuterLoop.11 { |
| 217 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 |
| 218 | } {3 {} 6 {} 9 {}} |
| 219 | test_compound_select_flippable select9-1.$iOuterLoop.12 { |
| 220 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 1 |
| 221 | } {3 {} 6 {} 9 {}} |
| 222 | test_compound_select select9-1.$iOuterLoop.13 { |
| 223 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 2 |
| 224 | } {3 {} 6 {} 9 {}} |
| 225 | test_compound_select_flippable select9-1.$iOuterLoop.14 { |
| 226 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 2, 1 |
| 227 | } {3 {} 6 {} 9 {}} |
| 228 | test_compound_select_flippable select9-1.$iOuterLoop.15 { |
| 229 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 1, 2 |
| 230 | } {3 {} 6 {} 9 {}} |
| 231 | |
| 232 | # Test some 2-way EXCEPT queries. |
| 233 | # |
| 234 | test_compound_select select9-1.$iOuterLoop.16 { |
| 235 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 |
| 236 | } {1 one 2 two 4 four 5 five 7 seven 8 eight 10 ten} |
| 237 | |
| 238 | test_compound_select select9-1.$iOuterLoop.17 { |
| 239 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 1 |
| 240 | } {1 one 2 two 4 four 5 five 7 seven 8 eight 10 ten} |
| 241 | |
| 242 | test_compound_select select9-1.$iOuterLoop.18 { |
| 243 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 2 |
| 244 | } {8 eight 5 five 4 four 1 one 7 seven 10 ten 2 two} |
| 245 | |
| 246 | test_compound_select select9-1.$iOuterLoop.19 { |
| 247 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 1, 2 |
| 248 | } {1 one 2 two 4 four 5 five 7 seven 8 eight 10 ten} |
| 249 | |
| 250 | test_compound_select select9-1.$iOuterLoop.20 { |
| 251 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 2, 1 |
| 252 | } {8 eight 5 five 4 four 1 one 7 seven 10 ten 2 two} |
| 253 | |
| 254 | incr iOuterLoop |
| 255 | } |
| 256 | |
danielk1977 | 6fb6444 | 2008-06-24 15:39:43 +0000 | [diff] [blame] | 257 | do_test select9-2.0 { |
| 258 | execsql { |
| 259 | DROP INDEX i1; |
| 260 | DROP INDEX i2; |
| 261 | DROP INDEX i3; |
| 262 | DROP INDEX i4; |
| 263 | } |
| 264 | } {} |
danielk1977 | 9afe684 | 2008-06-24 11:21:20 +0000 | [diff] [blame] | 265 | |
danielk1977 | 6fb6444 | 2008-06-24 15:39:43 +0000 | [diff] [blame] | 266 | proc reverse {lhs rhs} { |
| 267 | return [string compare $rhs $lhs] |
| 268 | } |
| 269 | db collate reverse reverse |
| 270 | |
| 271 | # This loop is similar to the previous one (test cases select9-1.*) |
| 272 | # except that the simple select statements have WHERE clauses attached |
| 273 | # to them. Sometimes the WHERE clause may be satisfied using the same |
| 274 | # index used for ORDER BY, sometimes not. |
| 275 | # |
| 276 | set iOuterLoop 1 |
| 277 | foreach indexes [list { |
| 278 | /* Do not create any indexes. */ |
| 279 | } { |
| 280 | CREATE INDEX i1 ON t1(a) |
| 281 | } { |
| 282 | DROP INDEX i1; |
| 283 | CREATE INDEX i1 ON t1(b, a) |
| 284 | } { |
| 285 | CREATE INDEX i2 ON t2(d DESC, e COLLATE REVERSE ASC); |
| 286 | } { |
| 287 | CREATE INDEX i3 ON t1(a DESC); |
| 288 | }] { |
| 289 | do_test select9-2.$iOuterLoop.1 { |
| 290 | execsql $indexes |
| 291 | } {} |
| 292 | |
| 293 | test_compound_select_flippable select9-2.$iOuterLoop.2 { |
| 294 | SELECT * FROM t1 WHERE a<5 UNION SELECT * FROM t2 WHERE d>=5 ORDER BY 1 |
| 295 | } {1 one I 2 two II 3 {} {} 4 four IV 5 ten XX 6 {} {} 7 fourteen XXVIII 8 sixteen XXXII 9 {} {} 10 twenty XL} |
| 296 | |
| 297 | test_compound_select_flippable select9-2.$iOuterLoop.2 { |
| 298 | SELECT * FROM t1 WHERE a<5 UNION SELECT * FROM t2 WHERE d>=5 ORDER BY 2, 1 |
| 299 | } {3 {} {} 6 {} {} 9 {} {} 4 four IV 7 fourteen XXVIII 1 one I 8 sixteen XXXII 5 ten XX 10 twenty XL 2 two II} |
| 300 | |
| 301 | test_compound_select_flippable select9-2.$iOuterLoop.3 { |
| 302 | SELECT * FROM t1 WHERE a<5 UNION SELECT * FROM t2 WHERE d>=5 |
| 303 | ORDER BY 2 COLLATE reverse, 1 |
| 304 | } {3 {} {} 6 {} {} 9 {} {} 2 two II 10 twenty XL 5 ten XX 8 sixteen XXXII 1 one I 7 fourteen XXVIII 4 four IV} |
| 305 | |
| 306 | test_compound_select_flippable select9-2.$iOuterLoop.4 { |
| 307 | SELECT * FROM t1 WHERE a<5 UNION ALL SELECT * FROM t2 WHERE d>=5 ORDER BY 1 |
| 308 | } {1 one I 2 two II 3 {} {} 4 four IV 5 ten XX 6 {} {} 7 fourteen XXVIII 8 sixteen XXXII 9 {} {} 10 twenty XL} |
| 309 | |
| 310 | test_compound_select_flippable select9-2.$iOuterLoop.5 { |
| 311 | SELECT * FROM t1 WHERE a<5 UNION ALL SELECT * FROM t2 WHERE d>=5 ORDER BY 2, 1 |
| 312 | } {3 {} {} 6 {} {} 9 {} {} 4 four IV 7 fourteen XXVIII 1 one I 8 sixteen XXXII 5 ten XX 10 twenty XL 2 two II} |
| 313 | |
| 314 | test_compound_select_flippable select9-2.$iOuterLoop.6 { |
| 315 | SELECT * FROM t1 WHERE a<5 UNION ALL SELECT * FROM t2 WHERE d>=5 |
| 316 | ORDER BY 2 COLLATE reverse, 1 |
| 317 | } {3 {} {} 6 {} {} 9 {} {} 2 two II 10 twenty XL 5 ten XX 8 sixteen XXXII 1 one I 7 fourteen XXVIII 4 four IV} |
| 318 | |
| 319 | test_compound_select select9-2.$iOuterLoop.4 { |
| 320 | SELECT a FROM t1 WHERE a<8 EXCEPT SELECT d FROM t2 WHERE d<=3 ORDER BY 1 |
| 321 | } {4 5 6 7} |
| 322 | |
| 323 | test_compound_select select9-2.$iOuterLoop.4 { |
| 324 | SELECT a FROM t1 WHERE a<8 INTERSECT SELECT d FROM t2 WHERE d<=3 ORDER BY 1 |
| 325 | } {1 2 3} |
| 326 | |
| 327 | } |
| 328 | |
danielk1977 | 7a8097b | 2008-06-30 07:53:09 +0000 | [diff] [blame] | 329 | do_test select9-2.X { |
| 330 | execsql { |
| 331 | DROP INDEX i1; |
| 332 | DROP INDEX i2; |
| 333 | DROP INDEX i3; |
| 334 | } |
| 335 | } {} |
| 336 | |
| 337 | # This procedure executes the SQL. Then it checks the generated program |
| 338 | # for the SQL and appends a "nosort" to the result if the program contains the |
| 339 | # SortCallback opcode. If the program does not contain the SortCallback |
| 340 | # opcode it appends "sort" |
| 341 | # |
| 342 | proc cksort {sql} { |
| 343 | set ::sqlite_sort_count 0 |
| 344 | set data [execsql $sql] |
| 345 | if {$::sqlite_sort_count} {set x sort} {set x nosort} |
| 346 | lappend data $x |
| 347 | return $data |
| 348 | } |
| 349 | |
| 350 | # If the right indexes exist, the following query: |
| 351 | # |
| 352 | # SELECT t1.a FROM t1 UNION ALL SELECT t2.d FROM t2 ORDER BY 1 |
| 353 | # |
| 354 | # can use indexes to run without doing a in-memory sort operation. |
| 355 | # This block of tests (select9-3.*) is used to check if the same |
| 356 | # is possible with: |
| 357 | # |
| 358 | # CREATE VIEW v1 AS SELECT a FROM t1 UNION ALL SELECT d FROM t2 |
| 359 | # SELECT a FROM v1 ORDER BY 1 |
| 360 | # |
danielk1977 | 4b86ef1 | 2008-07-01 14:39:35 +0000 | [diff] [blame] | 361 | # It turns out that it is. |
danielk1977 | 7a8097b | 2008-06-30 07:53:09 +0000 | [diff] [blame] | 362 | # |
| 363 | do_test select9-3.1 { |
| 364 | cksort { SELECT a FROM t1 ORDER BY 1 } |
| 365 | } {1 2 3 4 5 6 7 8 9 10 sort} |
| 366 | do_test select9-3.2 { |
| 367 | execsql { CREATE INDEX i1 ON t1(a) } |
| 368 | cksort { SELECT a FROM t1 ORDER BY 1 } |
| 369 | } {1 2 3 4 5 6 7 8 9 10 nosort} |
| 370 | do_test select9-3.3 { |
| 371 | cksort { SELECT a FROM t1 UNION ALL SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
| 372 | } {1 1 2 2 3 sort} |
| 373 | do_test select9-3.4 { |
| 374 | execsql { CREATE INDEX i2 ON t2(d) } |
| 375 | cksort { SELECT a FROM t1 UNION ALL SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
| 376 | } {1 1 2 2 3 nosort} |
| 377 | do_test select9-3.5 { |
| 378 | execsql { CREATE VIEW v1 AS SELECT a FROM t1 UNION ALL SELECT d FROM t2 } |
| 379 | cksort { SELECT a FROM v1 ORDER BY 1 LIMIT 5 } |
danielk1977 | 4b86ef1 | 2008-07-01 14:39:35 +0000 | [diff] [blame] | 380 | } {1 1 2 2 3 nosort} |
danielk1977 | 7a8097b | 2008-06-30 07:53:09 +0000 | [diff] [blame] | 381 | do_test select9-3.X { |
| 382 | execsql { |
| 383 | DROP INDEX i1; |
| 384 | DROP INDEX i2; |
| 385 | DROP VIEW v1; |
| 386 | } |
| 387 | } {} |
| 388 | |
| 389 | # This block of tests is the same as the preceding one, except that |
| 390 | # "UNION" is tested instead of "UNION ALL". |
| 391 | # |
| 392 | do_test select9-4.1 { |
| 393 | cksort { SELECT a FROM t1 ORDER BY 1 } |
| 394 | } {1 2 3 4 5 6 7 8 9 10 sort} |
| 395 | do_test select9-4.2 { |
| 396 | execsql { CREATE INDEX i1 ON t1(a) } |
| 397 | cksort { SELECT a FROM t1 ORDER BY 1 } |
| 398 | } {1 2 3 4 5 6 7 8 9 10 nosort} |
| 399 | do_test select9-4.3 { |
| 400 | cksort { SELECT a FROM t1 UNION SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
| 401 | } {1 2 3 4 5 sort} |
| 402 | do_test select9-4.4 { |
| 403 | execsql { CREATE INDEX i2 ON t2(d) } |
| 404 | cksort { SELECT a FROM t1 UNION SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
| 405 | } {1 2 3 4 5 nosort} |
| 406 | do_test select9-4.5 { |
| 407 | execsql { CREATE VIEW v1 AS SELECT a FROM t1 UNION SELECT d FROM t2 } |
| 408 | cksort { SELECT a FROM v1 ORDER BY 1 LIMIT 5 } |
| 409 | } {1 2 3 4 5 sort} |
| 410 | do_test select9-4.X { |
| 411 | execsql { |
| 412 | DROP INDEX i1; |
| 413 | DROP INDEX i2; |
| 414 | DROP VIEW v1; |
| 415 | } |
| 416 | } {} |
| 417 | |
drh | 70331cd | 2012-04-27 01:09:06 +0000 | [diff] [blame] | 418 | # Testing to make sure that queries involving a view of a compound select |
| 419 | # are planned efficiently. This detects a problem reported on the mailing |
| 420 | # list on 2012-04-26. See |
| 421 | # |
| 422 | # http://www.mail-archive.com/sqlite-users%40sqlite.org/msg69746.html |
| 423 | # |
| 424 | # For additional information. |
| 425 | # |
| 426 | do_test select9-5.1 { |
| 427 | db eval { |
| 428 | CREATE TABLE t51(x, y); |
| 429 | CREATE TABLE t52(x, y); |
| 430 | CREATE VIEW v5 as |
| 431 | SELECT x, y FROM t51 |
| 432 | UNION ALL |
| 433 | SELECT x, y FROM t52; |
| 434 | CREATE INDEX t51x ON t51(x); |
| 435 | CREATE INDEX t52x ON t52(x); |
| 436 | EXPLAIN QUERY PLAN |
| 437 | SELECT * FROM v5 WHERE x='12345' ORDER BY y; |
| 438 | } |
| 439 | } {~/SCAN TABLE/} ;# Uses indices with "*" |
| 440 | do_test select9-5.2 { |
| 441 | db eval { |
| 442 | EXPLAIN QUERY PLAN |
| 443 | SELECT x, y FROM v5 WHERE x='12345' ORDER BY y; |
| 444 | } |
| 445 | } {~/SCAN TABLE/} ;# Uses indices with "x, y" |
| 446 | do_test select9-5.3 { |
| 447 | db eval { |
| 448 | EXPLAIN QUERY PLAN |
| 449 | SELECT x, y FROM v5 WHERE +x='12345' ORDER BY y; |
| 450 | } |
| 451 | } {/SCAN TABLE/} ;# Full table scan if the "+x" prevents index usage. |
| 452 | |
drh | 5e128b2 | 2013-07-09 03:04:32 +0000 | [diff] [blame] | 453 | # 2013-07-09: Ticket [490a4b7235624298]: |
| 454 | # "WHERE 0" on the first element of a UNION causes an assertion fault |
| 455 | # |
| 456 | do_execsql_test select9-6.1 { |
| 457 | CREATE TABLE t61(a); |
| 458 | CREATE TABLE t62(b); |
| 459 | INSERT INTO t61 VALUES(111); |
| 460 | INSERT INTO t62 VALUES(222); |
| 461 | SELECT a FROM t61 WHERE 0 UNION SELECT b FROM t62; |
| 462 | } {222} |
| 463 | do_execsql_test select9-6.2 { |
| 464 | SELECT a FROM t61 WHERE 0 UNION ALL SELECT b FROM t62; |
| 465 | } {222} |
| 466 | do_execsql_test select9-6.3 { |
| 467 | SELECT a FROM t61 UNION SELECT b FROM t62 WHERE 0; |
| 468 | } {111} |
| 469 | |
| 470 | |
danielk1977 | 6fb6444 | 2008-06-24 15:39:43 +0000 | [diff] [blame] | 471 | |
| 472 | finish_test |