1 files changed, 10 insertions, 1 deletions
diff --git a/src/expr.c b/src/expr.c
index 776706105..986b4f9aa 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -941,7 +941,12 @@ Expr *sqlite3ExprAnd(sqlite3 *db, Expr *pLeft, Expr *pRight){
 ** Construct a new expression node for a function with multiple
 ** arguments.
 */
-Expr *sqlite3ExprFunction(Parse *pParse, ExprList *pList, Token *pToken){
+Expr *sqlite3ExprFunction(
+  Parse *pParse,        /* Parsing context */
+  ExprList *pList,      /* Argument list */
+  Token *pToken,        /* Name of the function */
+  int eDistinct         /* SF_Distinct or SF_ALL or 0 */
+){
   Expr *pNew;
   sqlite3 *db = pParse->db;
   assert( pToken );
@@ -950,10 +955,14 @@ Expr *sqlite3ExprFunction(Parse *pParse, ExprList *pList, Token *pToken){
     sqlite3ExprListDelete(db, pList); /* Avoid memory leak when malloc fails */
     return 0;
   }
+  if( pList && pList->nExpr > pParse->db->aLimit[SQLITE_LIMIT_FUNCTION_ARG] ){
+    sqlite3ErrorMsg(pParse, "too many arguments on function %T", pToken);
+  }
   pNew->x.pList = pList;
   ExprSetProperty(pNew, EP_HasFunc);
   assert( !ExprHasProperty(pNew, EP_xIsSelect) );
   sqlite3ExprSetHeightAndFlags(pParse, pNew);
+  if( eDistinct==SF_Distinct ) ExprSetProperty(pNew, EP_Distinct);
   return pNew;
 }