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Overview
| Comment: | Add a testcase macro to ensure testing a boundary case in DISTINCT processing. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ff9fc722dc481df1ce6a9733db1f033b |
| User & Date: | drh 2011-07-02 19:12:05 |
Context
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2011-07-04
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| 06:52 | Adjust a couple of test scripts so that they work with OMIT_UTF16 builds. (check-in: 6c51bad0 user: dan tags: trunk) | |
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2011-07-02
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| 19:12 | Add a testcase macro to ensure testing a boundary case in DISTINCT processing. (check-in: ff9fc722 user: drh tags: trunk) | |
| 15:32 | Ensure that automatic indexes are only created in scenarios where they may be used more than once. (check-in: 27c65d4d user: dan tags: trunk) | |
Changes
Changes to src/where.c.
1451 1451 ExprList *pDistinct, /* The DISTINCT expressions */ 1452 1452 int nEqCol /* Number of index columns with == */ 1453 1453 ){ 1454 1454 Bitmask mask = 0; /* Mask of unaccounted for pDistinct exprs */ 1455 1455 int i; /* Iterator variable */ 1456 1456 1457 1457 if( pIdx->zName==0 || pDistinct==0 || pDistinct->nExpr>=BMS ) return 0; 1458 + testcase( pDistinct->nExpr==BMS-1 ); 1458 1459 1459 1460 /* Loop through all the expressions in the distinct list. If any of them 1460 1461 ** are not simple column references, return early. Otherwise, test if the 1461 1462 ** WHERE clause contains a "col=X" clause. If it does, the expression 1462 1463 ** can be ignored. If it does not, and the column does not belong to the 1463 1464 ** same table as index pIdx, return early. Finally, if there is no 1464 1465 ** matching "col=X" expression and the column is on the same table as pIdx,