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Make a hard copy of the results of a subquery lest the result of the

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subquery be referenced after a change to the table that generated the subquery
result.

FossilOrigin-Name: 9c0d80907b4dee8ee8f205c2ebdb759f5ba1d771
This commit is contained in:
drh
2015-05-18 04:24:27 +00:00
parent e655a0e34e
commit df553659ad
4 changed files with 25 additions and 10 deletions
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9
src/select.c
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@@ -713,8 +713,13 @@ static void selectInnerLoop(
/* If the destination is an EXISTS(...) expression, the actual
** values returned by the SELECT are not required.
*/
sqlite3ExprCodeExprList(pParse, pEList, regResult,
(eDest==SRT_Output||eDest==SRT_Coroutine)?SQLITE_ECEL_DUP:0);
u8 ecelFlags;
if( eDest==SRT_Mem || eDest==SRT_Output || eDest==SRT_Coroutine ){
ecelFlags = SQLITE_ECEL_DUP;
}else{
ecelFlags = 0;
}
sqlite3ExprCodeExprList(pParse, pEList, regResult, ecelFlags);
}
/* If the DISTINCT keyword was present on the SELECT statement