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Overview
| Comment: | Add a missing OP_ColumnsUsed opcode to code for expressions like "? IN (SELECT ...)" in cases where expression can use an index that may contain NULL values. |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
0b1579caf06a2c42433b8bc9dc28c9ad |
| User & Date: | dan 2016-06-16 17:14:02.375 |
Context
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2018-12-14
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| 20:28 | Add a missing OP_ColumnsUsed opcode to code for expressions like "? IN (SELECT ...)" in cases where expression can use an index that may contain NULL values. (Backported fix from version 3.14.0). (Leaf check-in: 11368e673c user: drh tags: branch-3.8.9) | |
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2016-06-20
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| 17:25 | For a table on the rhs of a LEFT JOIN operator, do not include terms like "IS NULL" from the WHERE clause in the cursor-hint. These may be false for rows that the cursor would otherwise visit, but true for a row of all NULL values generated by the LEFT JOIN. (check-in: 913e595615 user: dan tags: trunk) | |
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2016-06-17
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| 14:33 | If a table is on the rhs of a LEFT JOIN, include only terms from the joins ON(...) clause in the cursor-hint passed via OP_CursorHint. (check-in: 2a2346b042 user: dan tags: cursor-hints) | |
| 13:01 | Add the json_quote() function to the JSON1 extension. (Closed-Leaf check-in: 2c3714aebf user: drh tags: json_quote) | |
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2016-06-16
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| 17:14 | Add a missing OP_ColumnsUsed opcode to code for expressions like "? IN (SELECT ...)" in cases where expression can use an index that may contain NULL values. (check-in: 0b1579caf0 user: dan tags: trunk) | |
| 11:16 | Fix a typo in a comment on the SrcList object. (check-in: 48b555c42d user: drh tags: trunk) | |
Changes
Changes to src/expr.c.
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sqlite3VdbeAddOp3(v, OP_OpenRead, iTab, pIdx->tnum, iDb);
sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
VdbeComment((v, "%s", pIdx->zName));
assert( IN_INDEX_INDEX_DESC == IN_INDEX_INDEX_ASC+1 );
eType = IN_INDEX_INDEX_ASC + pIdx->aSortOrder[0];
if( prRhsHasNull && !pTab->aCol[iCol].notNull ){
*prRhsHasNull = ++pParse->nMem;
sqlite3SetHasNullFlag(v, iTab, *prRhsHasNull);
}
sqlite3VdbeJumpHere(v, iAddr);
}
}
}
| > > > > > | 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 |
sqlite3VdbeAddOp3(v, OP_OpenRead, iTab, pIdx->tnum, iDb);
sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
VdbeComment((v, "%s", pIdx->zName));
assert( IN_INDEX_INDEX_DESC == IN_INDEX_INDEX_ASC+1 );
eType = IN_INDEX_INDEX_ASC + pIdx->aSortOrder[0];
if( prRhsHasNull && !pTab->aCol[iCol].notNull ){
#ifdef SQLITE_ENABLE_COLUMN_USED_MASK
const i64 sOne = 1;
sqlite3VdbeAddOp4Dup8(v, OP_ColumnsUsed,
iTab, 0, 0, (u8*)&sOne, P4_INT64);
#endif
*prRhsHasNull = ++pParse->nMem;
sqlite3SetHasNullFlag(v, iTab, *prRhsHasNull);
}
sqlite3VdbeJumpHere(v, iAddr);
}
}
}
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