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Optimize queries of the form "SELECT count(*) FROM <tbl>" by adding a sqlite3BtreeCount() interface to the btree layer. (CVS 6316)

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FossilOrigin-Name: d4aa6593183224b6868a322511511c0bbf63b598
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danielk1977
2009-02-24 10:01:51 +00:00
parent e2d7b24d08
commit a55331620e
9 changed files with 259 additions and 104 deletions
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src/func.c
+3 -2
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@@ -16,7 +16,7 @@
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: func.c,v 1.223 2009/02/19 14:39:25 danielk1977 Exp $
** $Id: func.c,v 1.224 2009/02/24 10:01:52 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <stdlib.h>
@@ -1413,7 +1413,8 @@ void sqlite3RegisterGlobalFunctions(void){
AGGREGATE(sum, 1, 0, 0, sumStep, sumFinalize ),
AGGREGATE(total, 1, 0, 0, sumStep, totalFinalize ),
AGGREGATE(avg, 1, 0, 0, sumStep, avgFinalize ),
AGGREGATE(count, 0, 0, 0, countStep, countFinalize ),
/* AGGREGATE(count, 0, 0, 0, countStep, countFinalize ), */
{0,SQLITE_UTF8,SQLITE_FUNC_COUNT,0,0,0,countStep,countFinalize,"count",0},
AGGREGATE(count, 1, 0, 0, countStep, countFinalize ),
AGGREGATE(group_concat, 1, 0, 0, groupConcatStep, groupConcatFinalize),
AGGREGATE(group_concat, 2, 0, 0, groupConcatStep, groupConcatFinalize),