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Clean up the ExprList that holds the names of columns in a CTE before checking

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for unused references in the ALTER TABLE implementation.

FossilOrigin-Name: 8223e79f987feda5c8e51ec52cec6798cca16d070b10558939e2888ca1a25b8e
This commit is contained in:
drh
2019-12-17 12:03:30 +00:00
parent 4dad7ed532
commit 646975c521
3 changed files with 12 additions and 10 deletions
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8
src/alter.c
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@@ -740,15 +740,17 @@ static int renameUnmapExprCb(Walker *pWalker, Expr *pExpr){
** to select statement pSelect.
*/
static void renameWalkWith(Walker *pWalker, Select *pSelect){
if( pSelect->pWith ){
With *pWith = pSelect->pWith;
if( pWith ){
int i;
for(i=0; i<pSelect->pWith->nCte; i++){
Select *p = pSelect->pWith->a[i].pSelect;
for(i=0; i<pWith->nCte; i++){
Select *p = pWith->a[i].pSelect;
NameContext sNC;
memset(&sNC, 0, sizeof(sNC));
sNC.pParse = pWalker->pParse;
sqlite3SelectPrep(sNC.pParse, p, &sNC);
sqlite3WalkSelect(pWalker, p);
sqlite3RenameExprlistUnmap(pWalker->pParse, pWith->a[i].pCols);
}
}
}