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Allow UNION ALL compounds to be promoted up to replace a simple wrapper

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SELECT even if the compounds are joins.

FossilOrigin-Name: 3d4b4f4fb7c1d9f1c742fef884383e9f50f8630e
This commit is contained in:
drh
2011-12-10 17:17:17 +00:00
parent 678a9aa7bd
commit 1acc6cbe00
3 changed files with 8 additions and 8 deletions
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2
src/select.c
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@@ -2812,7 +2812,7 @@ static int flattenSubquery(
testcase( (pSub1->selFlags & (SF_Distinct|SF_Aggregate))==SF_Aggregate );
if( (pSub1->selFlags & (SF_Distinct|SF_Aggregate))!=0
|| (pSub1->pPrior && pSub1->op!=TK_ALL)
|| NEVER(pSub1->pSrc==0) || pSub1->pSrc->nSrc!=1
|| NEVER(pSub1->pSrc==0) || pSub1->pSrc->nSrc<1
){
return 0;
}