try

Author: jennifersp

sql/expression/tablefunction/table_function.go

@@ -50,9 +50,9 @@ func (t *TableFunctionWrapper) NewInstance(ctx *sql.Context, db sql.Database, ar
 	if err != nil {
 		return nil, err
 	}
-	//if !f.Resolved() {
-	//	return nil, fmt.Errorf("table function is unresolved")
-	//}
+	if !f.Resolved() {
+		return nil, fmt.Errorf("table function is unresolved")
+	}
 	nt.funcExpr = f
 	return &nt, nil
 }
@@ -85,9 +85,10 @@ func (t *TableFunctionWrapper) RowIter(ctx *sql.Context, r sql.Row) (sql.RowIter
 	if err != nil {
 		return nil, err
 	}
-	if ri, ok := v.(sql.RowIter); ok {
+	switch ri := v.(type) {
+	case sql.RowIter:
 		return ri, nil
-	} else {
+	default:
 		return sql.RowsToRowIter(sql.Row{v}), nil
 	}
 }