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Overview
| Comment: | Make indexes on CAST(...) expressions work. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | index-on-cast |
| Files: | files | file ages | folders |
| SHA3-256: |
3ef711d98fb239cf24472f124e7b36b0 |
| User & Date: | dan 2019-01-28 18:08:59 |
Context
|
2019-01-28
| ||
| 18:58 | Fix a performance regression caused by the previous commit. Closed-Leaf check-in: c4db0ad1 user: drh tags: index-on-cast | |
| 18:08 | Make indexes on CAST(...) expressions work. check-in: 3ef711d9 user: dan tags: index-on-cast | |
| 16:50 | Fix a buffer overread in fts3 that could occur when accessing a corrupt database. check-in: a9faf903 user: dan tags: trunk | |
Changes
Changes to src/where.c.
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pScan->zCollName = 0;
if( pIdx ){
int j = iColumn;
iColumn = pIdx->aiColumn[j];
if( iColumn==XN_EXPR ){
pScan->pIdxExpr = pIdx->aColExpr->a[j].pExpr;
pScan->zCollName = pIdx->azColl[j];
}else if( iColumn==pIdx->pTable->iPKey ){
iColumn = XN_ROWID;
}else if( iColumn>=0 ){
pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;
pScan->zCollName = pIdx->azColl[j];
}
}else if( iColumn==XN_EXPR ){
|
> |
344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 |
pScan->zCollName = 0;
if( pIdx ){
int j = iColumn;
iColumn = pIdx->aiColumn[j];
if( iColumn==XN_EXPR ){
pScan->pIdxExpr = pIdx->aColExpr->a[j].pExpr;
pScan->zCollName = pIdx->azColl[j];
pScan->idxaff = sqlite3ExprAffinity(pScan->pIdxExpr);
}else if( iColumn==pIdx->pTable->iPKey ){
iColumn = XN_ROWID;
}else if( iColumn>=0 ){
pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;
pScan->zCollName = pIdx->azColl[j];
}
}else if( iColumn==XN_EXPR ){
|
Changes to test/indexexpr2.test.
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CREATE INDEX t5a ON t5( abs(a) );
CREATE INDEX t5b ON t5( abs(b) );
}
do_execsql_test 5.4 {
SELECT * FROM t5 WHERE abs(a)=2 or abs(b)=9;
} {2 4 3 9}
finish_test
|
> > > > > | > > > > > > > > > > > > > > > > > > > > > > > |
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CREATE INDEX t5a ON t5( abs(a) );
CREATE INDEX t5b ON t5( abs(b) );
}
do_execsql_test 5.4 {
SELECT * FROM t5 WHERE abs(a)=2 or abs(b)=9;
} {2 4 3 9}
#-------------------------------------------------------------------------
do_execsql_test 6.0 {
CREATE TABLE x1(a INTEGER PRIMARY KEY, b);
INSERT INTO x1 VALUES
(1, 123), (2, '123'), (3, '123abc'), (4, 123.0), (5, 1234);
}
do_execsql_test 6.1.1 {
SELECT a, b FROM x1 WHERE CAST(b AS INTEGER) = 123;
} {1 123 2 123 3 123abc 4 123.0}
do_execsql_test 6.1.2 {
CREATE INDEX x1i ON x1( CAST(b AS INTEGER) );
SELECT a, b FROM x1 WHERE CAST(b AS INTEGER) = 123;
} {1 123 2 123 3 123abc 4 123.0}
do_eqp_test 6.1.3 {
SELECT a, b FROM x1 WHERE CAST(b AS INTEGER) = 123;
} {SEARCH TABLE x1 USING INDEX x1i (<expr>=?)}
do_execsql_test 6.2.1 {
SELECT a, b FROM x1 WHERE CAST(b AS TEXT) = 123;
} {1 123 2 123}
do_execsql_test 6.2.2 {
CREATE INDEX x1i2 ON x1( CAST(b AS TEXT) );
SELECT a, b FROM x1 WHERE CAST(b AS TEXT) = 123;
} {1 123 2 123}
do_eqp_test 6.2.3 {
SELECT a, b FROM x1 WHERE CAST(b AS TEXT) = 123;
} {SEARCH TABLE x1 USING INDEX x1i2 (<expr>=?)}
finish_test
|