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Raise an error if a term of the form "TABLE.*" appears in the RETURNING clause,

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as SQLite does not (yet) know how to handle that.
Ticket [132994c8b1063bfb].

FossilOrigin-Name: 3039bcaff95bb5d096c80b5eefdaeda6abd1d1337e829f32fd28a968f663f481
This commit is contained in:
drh
2021-03-30 01:52:21 +00:00
parent 28a314e74d
commit 0d23f678b1
4 changed files with 44 additions and 10 deletions
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22
src/trigger.c
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@@ -823,6 +823,25 @@ SrcList *sqlite3TriggerStepSrc(
return pSrc;
}
/*
** Return true if the pExpr term from the RETURNING clause argument
** list is of the form "*". Raise an error if the terms if of the
** form "table.*".
*/
static int isAsteriskTerm(
Parse *pParse, /* Parsing context */
Expr *pTerm /* A term in the RETURNING clause */
){
assert( pTerm!=0 );
if( pTerm->op==TK_ASTERISK ) return 1;
if( pTerm->op!=TK_DOT ) return 0;
assert( pTerm->pRight!=0 );
assert( pTerm->pLeft!=0 );
if( pTerm->pRight->op!=TK_ASTERISK ) return 0;
sqlite3ErrorMsg(pParse, "RETURNING may not use \"TABLE.*\" wildcards");
return 1;
}
/* The input list pList is the list of result set terms from a RETURNING
** clause. The table that we are returning from is pTab.
**
@@ -840,7 +859,8 @@ static ExprList *sqlite3ExpandReturning(
for(i=0; i<pList->nExpr; i++){
Expr *pOldExpr = pList->a[i].pExpr;
if( ALWAYS(pOldExpr!=0) && pOldExpr->op==TK_ASTERISK ){
if( NEVER(pOldExpr==0) ) continue;
if( isAsteriskTerm(pParse, pOldExpr) ){
int jj;
for(jj=0; jj<pTab->nCol; jj++){
Expr *pNewExpr;