Reference count the KeyInfo object. Cache a copy of an appropriate KeyInfo
for each index in the Index object, and reuse that one copy as much as possible.
FossilOrigin-Name: defd5205a7cc3543cdd18f906f568e943b8b3a2c
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index b0b9761..ea0cde7 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -1532,10 +1532,11 @@
** for the rowid at the end.
*/
struct KeyInfo {
- sqlite3 *db; /* The database connection */
+ u32 nRef; /* Number of references to this KeyInfo object */
u8 enc; /* Text encoding - one of the SQLITE_UTF* values */
u16 nField; /* Number of key columns in the index */
u16 nXField; /* Number of columns beyond the key columns */
+ sqlite3 *db; /* The database connection */
u8 *aSortOrder; /* Sort order for each column. */
CollSeq *aColl[1]; /* Collating sequence for each term of the key */
};
@@ -1604,6 +1605,7 @@
u8 *aSortOrder; /* for each column: True==DESC, False==ASC */
char **azColl; /* Array of collation sequence names for index */
Expr *pPartIdxWhere; /* WHERE clause for partial indices */
+ KeyInfo *pKeyInfo; /* A KeyInfo object suitable for this index */
int tnum; /* DB Page containing root of this index */
LogEst szIdxRow; /* Estimated average row size in bytes */
u16 nKeyCol; /* Number of columns forming the key */
@@ -3159,7 +3161,12 @@
Schema *sqlite3SchemaGet(sqlite3 *, Btree *);
int sqlite3SchemaToIndex(sqlite3 *db, Schema *);
KeyInfo *sqlite3KeyInfoAlloc(sqlite3*,int,int);
-KeyInfo *sqlite3IndexKeyinfo(Parse *, Index *);
+void sqlite3KeyInfoUnref(KeyInfo*);
+KeyInfo *sqlite3KeyInfoRef(KeyInfo*);
+KeyInfo *sqlite3KeyInfoOfIndex(Parse*, Index*);
+#ifdef SQLITE_DEBUG
+int sqlite3KeyInfoIsWriteable(KeyInfo*);
+#endif
int sqlite3CreateFunc(sqlite3 *, const char *, int, int, void *,
void (*)(sqlite3_context*,int,sqlite3_value **),
void (*)(sqlite3_context*,int,sqlite3_value **), void (*)(sqlite3_context*),