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Do not flatten sub-queries that contain window functions.

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FossilOrigin-Name: 236cb75bd1f0d5eb86aa5f52d8d548e7263c34633833dcea9dfc934f142113b8
This commit is contained in:
dan
2018-06-08 16:11:55 +00:00
parent 03854d2ecc
commit dacf1de95c
7 changed files with 63 additions and 50 deletions
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20
src/expr.c
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@@ -1182,24 +1182,6 @@ static int dupedExprSize(Expr *p, int flags){
return nByte;
}
static Window *winDup(sqlite3 *db, Window *p){
Window *pNew = 0;
if( p ){
pNew = sqlite3DbMallocZero(db, sizeof(Window));
if( pNew ){
pNew->pFilter = sqlite3ExprDup(db, p->pFilter, 0);
pNew->pPartition = sqlite3ExprListDup(db, p->pPartition, 0);
pNew->pOrderBy = sqlite3ExprListDup(db, p->pOrderBy, 0);
pNew->eType = p->eType;
pNew->eEnd = p->eEnd;
pNew->eStart = p->eStart;
pNew->pStart = sqlite3ExprDup(db, pNew->pStart, 0);
pNew->pEnd = sqlite3ExprDup(db, pNew->pEnd, 0);
}
}
return pNew;
}
/*
** This function is similar to sqlite3ExprDup(), except that if pzBuffer
** is not NULL then *pzBuffer is assumed to point to a buffer large enough
@@ -1289,7 +1271,7 @@ static Expr *exprDup(sqlite3 *db, Expr *p, int dupFlags, u8 **pzBuffer){
if( ExprHasProperty(p, EP_Reduced|EP_TokenOnly) ){
pNew->pWin = 0;
}else{
pNew->pWin = winDup(db, p->pWin);
pNew->pWin = sqlite3WindowDup(db, p->pWin);
}
if( !ExprHasProperty(p, EP_TokenOnly|EP_Leaf) ){
if( pNew->op==TK_SELECT_COLUMN ){