amaliujia commented on a change in pull request #1606: [CALCITE-3466] Do not drop the "group by" clause of subquery in a select statement with "group by" clause in JDBC adapter. URL: https://github.com/apache/calcite/pull/1606#discussion_r350991581
########## File path: core/src/test/java/org/apache/calcite/rel/rel2sql/RelToSqlConverterTest.java ########## @@ -321,6 +321,20 @@ private static String toSql(RelNode root, SqlDialect dialect) { .ok(expectedMySql); } + @Test public void testSelectQueryWithGroupBySubQuery() { + String query = "select \"product_class_id\", count(\"product_id\")\n" + + "from (select \"product_class_id\", \"product_id\"\n" + + "from \"product\"\n" + + "group by \"product_class_id\", \"product_id\") as t\n" + + "group by \"product_class_id\""; + final String expected = "SELECT \"product_class_id\", COUNT(*)\n" Review comment: Surprisingly this test passes. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services