Disable the unused EU4_EXPR mode for the IdList object.

FossilOrigin-Name: 5bcf4aa3bf6b1b9f47142bc37683bb3bf0adeffd052d07449af7c9b415add052

2 files changed, 3 insertions, 5 deletions

diff --git a/src/build.c b/src/build.c
index 126897c85..1c632c94e 100644
--- a/src/build.c
+++ b/src/build.c
@@ -4695,12 +4695,10 @@ IdList *sqlite3IdListAppend(Parse *pParse, IdList *pList, Token *pToken){
 */
 void sqlite3IdListDelete(sqlite3 *db, IdList *pList){
   int i;
-  int delExpr;
   if( pList==0 ) return;
-  delExpr = pList->eU4==EU4_EXPR;
+  assert( pList->eU4!=EU4_EXPR ); /* EU4_EXPR mode is not currently used */
   for(i=0; i<pList->nId; i++){
     sqlite3DbFree(db, pList->a[i].zName);
-    if( delExpr ) sqlite3ExprDelete(db, pList->a[i].u4.pExpr);
   }
   sqlite3DbFreeNN(db, pList);
 }
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index bc618df7d..9363adbb9 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3044,7 +3044,7 @@ struct IdList {
     char *zName;      /* Name of the identifier */
     union {
       int idx;          /* Index in some Table.aCol[] of a column named zName */
-      Expr *pExpr;      /* Expr to implement a USING variable */
+      Expr *pExpr;      /* Expr to implement a USING variable -- NOT USED */
     } u4;
   } a[1];
 };
@@ -3055,7 +3055,7 @@ struct IdList {
 */
 #define EU4_NONE   0   /* Does not use IdList.a.u4 */
 #define EU4_IDX    1   /* Uses IdList.a.u4.idx */
-#define EU4_EXPR   2   /* Uses IdList.a.u4.pExpr */
+#define EU4_EXPR   2   /* Uses IdList.a.u4.pExpr -- NOT CURRENTLY USED */
 
 /*
 ** The SrcItem object represents a single term in the FROM clause of a query.