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Alternative fix to ticket [c8d3b9f0a750a529]: Prior to deleting or modifying

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an Expr not that is referenced by an AggInfo, modify the AggInfo to get its
own copy of the original Expr.

FossilOrigin-Name: 7682d8a768fbccfe0cc956e9f6481637146e1ab9763b248ff11052761ce32e32
This commit is contained in:
drh
2020-06-07 17:33:18 +00:00
parent a0365c487c
commit 896366282d
9 changed files with 276 additions and 23 deletions
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5
src/window.c
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@@ -956,12 +956,16 @@ int sqlite3WindowRewrite(Parse *pParse, Select *p){
Window *pMWin = p->pWin; /* Master window object */
Window *pWin; /* Window object iterator */
Table *pTab;
Walker w;
u32 selFlags = p->selFlags;
pTab = sqlite3DbMallocZero(db, sizeof(Table));
if( pTab==0 ){
return sqlite3ErrorToParser(db, SQLITE_NOMEM);
}
sqlite3AggInfoPersistWalkerInit(&w, pParse);
sqlite3WalkSelect(&w, p);
p->pSrc = 0;
p->pWhere = 0;
@@ -1042,7 +1046,6 @@ int sqlite3WindowRewrite(Parse *pParse, Select *p){
p->pSrc = sqlite3SrcListAppend(pParse, 0, 0, 0);
if( p->pSrc ){
Table *pTab2;
Walker w;
p->pSrc->a[0].pSelect = pSub;
sqlite3SrcListAssignCursors(pParse, p->pSrc);
pSub->selFlags |= SF_Expanded;