fix EOF on proc

Author: elianddb

sql/procedures/interpreter_logic.go

@@ -965,6 +965,11 @@ func Call(ctx *sql.Context, iNode InterpreterNode) (sql.RowIter, *InterpreterSta
 		rowIters = append(rowIters, sql.RowsToRowIter(sql.Row{types.NewOkResult(0)}))
 	} else if retSch != nil {
 		iNode.SetSchema(retSch)
+	} else {
+		// If we have rowIters but no meaningful schema, return OkResult
+		// This ensures CALL statements always return proper result sets for MySQL protocol compatibility
+		iNode.SetSchema(types.OkResultSchema)
+		rowIters = []sql.RowIter{sql.RowsToRowIter(sql.Row{types.NewOkResult(0)})}
 	}
 
 	return rowIters[len(rowIters)-1], stack, nil

sql/rowexec/proc_iters.go

@@ -121,14 +121,20 @@ var _ sql.MutableRowIter = (*callIter)(nil)
 
 // Next implements the sql.RowIter interface.
 func (ci *callIter) Next(ctx *sql.Context) (sql.Row, error) {
+	if ci.innerIter == nil {
+		return nil, io.EOF
+	}
 	return ci.innerIter.Next(ctx)
 }
 
 // Close implements the sql.RowIter interface.
 func (ci *callIter) Close(ctx *sql.Context) error {
-	err := ci.innerIter.Close(ctx)
-	if err != nil {
-		return err
+	var err error
+	if ci.innerIter != nil {
+		err = ci.innerIter.Close(ctx)
+		if err != nil {
+			return err
+		}
 	}
 	err = ci.call.Pref.CloseAllCursors(ctx)
 	if err != nil {