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Ensure that the same subquery does not go through the window-function rewrite

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more than once, even when that subquery is part of a virtual table constraint
that lacks the omit flag.

FossilOrigin-Name: d0bc7db6b0a53edc04815622c46250d26f526f56e59f14875f4e18c75b49000d
This commit is contained in:
drh
2019-11-14 13:24:04 +00:00
parent b88eaf1619
commit ba01634cd3
4 changed files with 32 additions and 30 deletions
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3
src/window.c
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@@ -903,7 +903,7 @@ static ExprList *exprListAppendList(
*/
int sqlite3WindowRewrite(Parse *pParse, Select *p){
int rc = SQLITE_OK;
if( p->pWin && p->pPrior==0 ){
if( p->pWin && p->pPrior==0 && (p->selFlags & SF_WinRewrite)==0 ){
Vdbe *v = sqlite3GetVdbe(pParse);
sqlite3 *db = pParse->db;
Select *pSub = 0; /* The subquery */
@@ -928,6 +928,7 @@ int sqlite3WindowRewrite(Parse *pParse, Select *p){
p->pGroupBy = 0;
p->pHaving = 0;
p->selFlags &= ~SF_Aggregate;
p->selFlags |= SF_WinRewrite;
/* Create the ORDER BY clause for the sub-select. This is the concatenation
** of the window PARTITION and ORDER BY clauses. Then, if this makes it