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Add the SQLITE_ENABLE_STAT2 macro. If this is not defined at build-time, the stat2 table is not created, populated, or used.

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FossilOrigin-Name: 362665e89c21fd603d9f8ad6c0ead590e885af7c
This commit is contained in:
dan
2009-08-19 08:18:32 +00:00
parent e275dc3fb8
commit 69188d9a66
9 changed files with 118 additions and 65 deletions
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8
src/where.c
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@@ -1904,6 +1904,7 @@ static void bestVirtualIndex(
** Or, if an OOM occurs while converting text values between encodings,
** SQLITE_NOMEM is returned.
*/
#ifdef SQLITE_ENABLE_STAT2
static int whereRangeRegion(
Parse *pParse, /* Database connection */
Index *pIdx, /* Index to consider domain of */
@@ -1970,6 +1971,7 @@ static int whereRangeRegion(
}
return SQLITE_OK;
}
#endif /* #ifdef SQLITE_ENABLE_STAT2 */
/*
** This function is used to estimate the number of rows that will be visited
@@ -2015,10 +2017,12 @@ static int whereRangeScanEst(
WhereTerm *pUpper,
int *piEst /* OUT: Return value */
){
int rc = SQLITE_OK;
#ifdef SQLITE_ENABLE_STAT2
sqlite3 *db = pParse->db;
sqlite3_value *pLowerVal = 0;
sqlite3_value *pUpperVal = 0;
int rc = SQLITE_OK;
if( nEq==0 && p->aSample ){
int iEst;
@@ -2053,8 +2057,8 @@ static int whereRangeScanEst(
*piEst = iEst;
return rc;
}
fallback:
#endif
assert( pLower || pUpper );
*piEst = (SQLITE_INDEX_SAMPLES-1) / ((pLower&&pUpper)?9:3);
return rc;