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Overview
| Comment: | Add a testcase() macro to help verfity the row estimation logic. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | stat4-experimental |
| Files: | files | file ages | folders |
| SHA1: | 6ba609522ea7325341fad93bdb5f869c |
| User & Date: | drh 2014-08-28 17:20:37 |
Context
|
2014-08-28
| ||
| 17:30 | Fix a problem causing an inaccurate stat4-based estimate for the number of rows visited by a range scan. check-in: a9daf3ac user: drh tags: trunk | |
| 17:20 | Add a testcase() macro to help verfity the row estimation logic. Closed-Leaf check-in: 6ba60952 user: drh tags: stat4-experimental | |
| 16:01 | Fix a problem causing an inaccurate stat4-based estimate for the number of rows visited by a range scan. check-in: 052d89b5 user: dan tags: stat4-experimental | |
Changes
Changes to src/where.c.
2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 |
** less than the upper bound of the range query. Where the upper bound
** is either ($P) or ($P:$U). Again, even if $U is available, both values
** of iUpper are requested of whereKeyStats() and the smaller used.
*/
tRowcnt iLower;
tRowcnt iUpper;
if( pRec ) pRec->nField = pBuilder->nRecValid;
if( nEq==p->nKeyCol ){
aff = SQLITE_AFF_INTEGER;
}else{
aff = p->pTable->aCol[p->aiColumn[nEq]].affinity;
}
/* Determine iLower and iUpper using ($P) only. */
if( nEq==0 ){
|
> > | > |
2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 |
** less than the upper bound of the range query. Where the upper bound
** is either ($P) or ($P:$U). Again, even if $U is available, both values
** of iUpper are requested of whereKeyStats() and the smaller used.
*/
tRowcnt iLower;
tRowcnt iUpper;
if( pRec ){
testcase( pRec->nField!=pBuilder->nRecValid );
pRec->nField = pBuilder->nRecValid;
}
if( nEq==p->nKeyCol ){
aff = SQLITE_AFF_INTEGER;
}else{
aff = p->pTable->aCol[p->aiColumn[nEq]].affinity;
}
/* Determine iLower and iUpper using ($P) only. */
if( nEq==0 ){
|