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Always provide the BTREE_BULKLOAD hint, even when SQLITE_ENABLE_CURSOR_HINTS

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is not defined, as that hint gives a 4% performance increase.

FossilOrigin-Name: 83a844357e132683ab3d88eee0fe32a8beeb6662
This commit is contained in:
drh
2015-08-14 23:57:04 +00:00
parent 1eb6eeb829
commit 0403cb3012
5 changed files with 28 additions and 42 deletions
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18
src/btree.h
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@@ -153,14 +153,6 @@ int sqlite3BtreeNewDb(Btree *p);
** Kinds of hints that can be passed into the sqlite3BtreeCursorHint()
** interface.
**
** Note that cursor hints are not used by the canonical SQLite b-tree
** ayer. Cursor hints are provided so that systems that substitute their
** on custom b-tree layer can have access to additional information that might
** boost performance. Hints are only provided if SQLite is compiled with
** SQLITE_ENABLE_CURSOR_HINTS. The hinting interface is undocumented
** (except for comments such as this) and is subject to change from one
** release of SQLite to the next.
**
** BTREE_HINT_FLAGS (arguments: unsigned int)
**
** Some combinatation of BTREE_BULKLOAD and BTREE_SEEK_EQ flags. The
@@ -184,6 +176,11 @@ int sqlite3BtreeNewDb(Btree *p);
** to prefetch content from remote machines - to provide those
** implementations with limits on what needs to be prefetched and thereby
** reduce network bandwidth.
**
** Note that BTREE_HINT_FLAGS with BTREE_BULKLOAD is the only hint used by
** standard SQLite. The other hints are provided for extentions that use
** the SQLite parser and code generator but substitute their own storage
** engine.
*/
#define BTREE_HINT_FLAGS 1 /* Set flags indicating cursor usage */
#define BTREE_HINT_RANGE 2 /* Range constraints on queries */
@@ -204,10 +201,6 @@ 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 */
#ifdef SQLITE_ENABLE_CURSOR_HINTS
void sqlite3BtreeCursorHint(BtCursor*, int, ...);
#endif
int sqlite3BtreeCursor(
Btree*, /* BTree containing table to open */
int iTable, /* Index of root page */
@@ -217,6 +210,7 @@ int sqlite3BtreeCursor(
);
int sqlite3BtreeCursorSize(void);
void sqlite3BtreeCursorZero(BtCursor*);
void sqlite3BtreeCursorHint(BtCursor*, int, ...);
int sqlite3BtreeCloseCursor(BtCursor*);
int sqlite3BtreeMovetoUnpacked(