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Recompute the set of columns used for each table when the table is

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involved in query flattening.

FossilOrigin-Name: a9bb71ba708ba72255ba8d18c9856e38ddf53eae2d61c8435149354fb2b2459e
This commit is contained in:
drh
2020-03-21 00:05:53 +00:00
parent ec8e689a20
commit 2aee514b4c
5 changed files with 62 additions and 19 deletions
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19
src/walker.c
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@@ -156,15 +156,16 @@ int sqlite3WalkSelectFrom(Walker *pWalker, Select *p){
struct SrcList_item *pItem;
pSrc = p->pSrc;
assert( pSrc!=0 );
for(i=pSrc->nSrc, pItem=pSrc->a; i>0; i--, pItem++){
if( pItem->pSelect && sqlite3WalkSelect(pWalker, pItem->pSelect) ){
return WRC_Abort;
}
if( pItem->fg.isTabFunc
&& sqlite3WalkExprList(pWalker, pItem->u1.pFuncArg)
){
return WRC_Abort;
if( pSrc ){
for(i=pSrc->nSrc, pItem=pSrc->a; i>0; i--, pItem++){
if( pItem->pSelect && sqlite3WalkSelect(pWalker, pItem->pSelect) ){
return WRC_Abort;
}
if( pItem->fg.isTabFunc
&& sqlite3WalkExprList(pWalker, pItem->u1.pFuncArg)
){
return WRC_Abort;
}
}
}
return WRC_Continue;