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Provide the BTREE_SEEK_EQ hint to the b-tree layer.

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FossilOrigin-Name: e750830f1e61160c0c67e35b13e50b35a95b50e1
This commit is contained in:
drh
2015-03-20 14:57:50 +00:00
parent 80103fc614
commit e0997b341b
7 changed files with 74 additions and 25 deletions
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15
src/btree.h
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@@ -152,8 +152,18 @@ int sqlite3BtreeNewDb(Btree *p);
/*
** Values that may be OR'd together to form the second argument of an
** sqlite3BtreeCursorHints() call.
**
** The BTREE_BULKLOAD flag is set on index cursors when the index is going
** to be filled with content that is already in sorted order.
**
** The BTREE_SEEK_EQ flag is set on cursors that will get OP_SeekGE or
** OP_SeekLE opcodes for a range search, but where the range of entries
** selected will all have the same key. In other words, the cursor will
** be used only for equality key searches.
**
*/
#define BTREE_BULKLOAD 0x00000001
#define BTREE_BULKLOAD 0x00000001 /* Used to full index in sorted order */
#define BTREE_SEEK_EQ 0x00000002 /* EQ seeks only - no range seeks */
int sqlite3BtreeCursor(
Btree*, /* BTree containing table to open */
@@ -199,6 +209,9 @@ void sqlite3BtreeIncrblobCursor(BtCursor *);
void sqlite3BtreeClearCursor(BtCursor *);
int sqlite3BtreeSetVersion(Btree *pBt, int iVersion);
void sqlite3BtreeCursorHints(BtCursor *, unsigned int mask);
#ifdef SQLITE_DEBUG
int sqlite3BtreeCursorHasHint(BtCursor*, unsigned int mask);
#endif
int sqlite3BtreeIsReadonly(Btree *pBt);
int sqlite3HeaderSizeBtree(void);