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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. (Backported fix from version 3.14.0). |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | branch-3.8.9 |
| Files: | files | file ages | folders |
| SHA3-256: |
11368e673cc5a9a3ccf96d1c6fa37213 |
| User & Date: | drh 2018-12-14 20:28:12.680 |
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) | |
| 20:20 | Add the OP_ColumnsUsed opcode (when compiled with SQLITE_ENABLE_COLUMN_USED_MASK) as a hint to the b-tree layer as to which columns of a btree cursor will be used. (Backport from 3.8.11) (check-in: b29e02f877 user: drh tags: branch-3.8.9) | |
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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) | |
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);
}
}
}
| > > > > > | 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 |
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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