Fix tests

Author: msiomkin

test/select_tests.cpp

@@ -1259,7 +1259,7 @@ TEST(FunctionSchema) {
   TEST_PARSE_SQL_QUERY(
       "SELECT sys.uuid();"
       "SELECT json.isarray('[1, 2, 3]');"
-      result, 1);
+      result, 2);
 
   auto stmt = (SelectStatement*)result.getStatement(0);
   ASSERT_TRUE(stmt->selectList);
@@ -1268,7 +1268,7 @@ TEST(FunctionSchema) {
   ASSERT_STREQ(stmt->selectList->at(0)->name, "uuid");
   ASSERT_EQ(stmt->selectList->at(0)->exprList->size, 0);
 
-  auto stmt = (SelectStatement*)result.getStatement(1);
+  stmt = (SelectStatement*)result.getStatement(1);
   ASSERT_TRUE(stmt->selectList);
   ASSERT_EQ(stmt->selectList->size(), 1);
   ASSERT_STREQ(stmt->selectList->at(0)->schema, "json");