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Make a deep copy of the result of a subquery in case the subquery is

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reused.  Fix for the problem reported by
[forum:/forumpost/28216b36ac|forum post 28216b36ac] and introduced by
check-in [f30fb19ff763a7cb].  Further changes to try to optimize the new
OP_Copy opcode back into either OP_SCopy or OP_Move will be attempted
separately.  A test case will be in TH3.

FossilOrigin-Name: c9f0b9cb0aef107265435e22c164dd3c974eadfd00abf7cfd4fc7ec95c0dd7d0
This commit is contained in:
drh
2021-05-28 12:48:31 +00:00
parent d2f55773f1
commit e9de65201c
3 changed files with 8 additions and 8 deletions
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2
src/wherecode.c
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@@ -756,7 +756,7 @@ static int codeAllEqualityTerms(
sqlite3ReleaseTempReg(pParse, regBase);
regBase = r1;
}else{
sqlite3VdbeAddOp2(v, OP_SCopy, r1, regBase+j);
sqlite3VdbeAddOp2(v, OP_Copy, r1, regBase+j);
}
}
if( pTerm->eOperator & WO_IN ){