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Correct handling of outer joins in the FROM clause of an UPDATE statement

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that occurs inside of a trigger.  Follow-on to [98b3816bbaf539ea].

FossilOrigin-Name: 664a49fa813144b6fa5a7ae3f65af5412f150dd5def261c4d581d706b39f7846
This commit is contained in:
drh
2022-05-26 17:33:42 +00:00
parent e91bde4655
commit 26c4df0fb0
4 changed files with 92 additions and 9 deletions
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10
src/trigger.c
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@@ -514,7 +514,7 @@ TriggerStep *sqlite3TriggerInsertStep(
TriggerStep *sqlite3TriggerUpdateStep(
Parse *pParse, /* Parser */
Token *pTableName, /* Name of the table to be updated */
SrcList *pFrom,
SrcList *pFrom, /* FROM clause for an UPDATE-FROM, or NULL */
ExprList *pEList, /* The SET clause: list of column and new values */
Expr *pWhere, /* The WHERE clause */
u8 orconf, /* The conflict algorithm. (OE_Abort, OE_Ignore, etc) */
@@ -850,6 +850,14 @@ SrcList *sqlite3TriggerStepSrc(
}
if( pStep->pFrom ){
SrcList *pDup = sqlite3SrcListDup(db, pStep->pFrom, 0);
if( pDup && pDup->nSrc>1 ){
Select *pSubquery;
Token as;
pSubquery = sqlite3SelectNew(pParse,0,pDup,0,0,0,0,SF_NestedFrom,0);
as.n = 0;
as.z = 0;
pDup = sqlite3SrcListAppendFromTerm(pParse,0,0,0,&as,pSubquery,0);
}
pSrc = sqlite3SrcListAppendList(pParse, pSrc, pDup);
}
}else{