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Overview
| Comment: | Fix the cost estimation in the BestIndex method of the eponymous pragma virtual table implementation. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | pragma-as-vtab |
| Files: | files | file ages | folders |
| SHA1: |
7126807a186746a8663fbaa267d63214 |
| User & Date: | drh 2016-12-15 21:33:55 |
Context
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2016-12-16
| ||
| 01:09 | Merge enhancements from trunk, and especially the ability to use temp.sqlite_master as an alias for sqlite_temp_master. (check-in: 994a4401 user: drh tags: pragma-as-vtab) | |
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2016-12-15
| ||
| 21:33 | Fix the cost estimation in the BestIndex method of the eponymous pragma virtual table implementation. (check-in: 7126807a user: drh tags: pragma-as-vtab) | |
| 21:11 | The pragma as eponymous virtual table mechanism now appears to work. (check-in: 2c274a1a user: drh tags: pragma-as-vtab) | |
Changes
Changes to src/pragma.c.
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*/
static int pragmaVtabBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
PragmaVtab *pTab = (PragmaVtab*)tab;
const struct sqlite3_index_constraint *pConstraint;
int i, j;
int seen[2];
if( pTab->nHidden==0 ){ return SQLITE_OK; }
pConstraint = pIdxInfo->aConstraint;
seen[0] = 0;
seen[1] = 0;
for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
if( pConstraint->usable==0 ) continue;
if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
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> |
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*/
static int pragmaVtabBestIndex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo){
PragmaVtab *pTab = (PragmaVtab*)tab;
const struct sqlite3_index_constraint *pConstraint;
int i, j;
int seen[2];
pIdxInfo->estimatedCost = (double)1;
if( pTab->nHidden==0 ){ return SQLITE_OK; }
pConstraint = pIdxInfo->aConstraint;
seen[0] = 0;
seen[1] = 0;
for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
if( pConstraint->usable==0 ) continue;
if( pConstraint->op!=SQLITE_INDEX_CONSTRAINT_EQ ) continue;
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