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Merge the BTREE_FORDELETE enhancement with this branch.

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FossilOrigin-Name: 20da0849ce910ceb445954dfc5f985acf9a02695
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dan
2015-10-26 20:11:24 +00:00
parent 0691191d26 ad61c46409
commit c5dc3dcd6e
13 changed files with 244 additions and 36 deletions
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16
src/btree.h
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@@ -201,6 +201,22 @@ int sqlite3BtreeNewDb(Btree *p);
#define BTREE_BULKLOAD 0x00000001 /* Used to full index in sorted order */
#define BTREE_SEEK_EQ 0x00000002 /* EQ seeks only - no range seeks */
/*
** Flags passed as the third argument to sqlite3BtreeCursor().
**
** For read-only cursors the wrFlag argument is always zero. For read-write
** cursors it may be set to either (BTREE_WRCSR|BTREE_FORDELETE) or
** (BTREE_WRCSR). If the BTREE_FORDELETE flag is set, then the cursor will
** only be used by SQLite for the following:
**
** * to seek to and delete specific entries, and/or
**
** * to read values that will be used to create keys that other
** BTREE_FORDELETE cursors will seek to and delete.
*/
#define BTREE_WRCSR 0x00000004 /* read-write cursor */
#define BTREE_FORDELETE 0x00000008 /* Cursor is for seek/delete only */
int sqlite3BtreeCursor(
Btree*, /* BTree containing table to open */
int iTable, /* Index of root page */