You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@calcite.apache.org by "yanjing.wang (Jira)" <ji...@apache.org> on 2021/11/24 12:29:00 UTC
[jira] [Updated] (CALCITE-4901) RelToSqlConverter adds redundant order by output column for the result sql
[ https://issues.apache.org/jira/browse/CALCITE-4901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
yanjing.wang updated CALCITE-4901:
----------------------------------
Description:
In RelToSqlConverterTest, I add the following case
{code:java}
@Test void testOrderByNotInSelectList() {
String query = "select count(1)\n"
+ "from \"foodmart\".\"product\"\n"
+ "group by \"product_id\"\n"
+ "order by \"product_id\" desc\n";
final String expected = "SELECT COUNT(1)\n"
+ "FROM \"foodmart\".\"product\"\n"
+ "GROUP BY \"product_id\"\n"
+ "ORDER BY \"product_id\" desc\n";
sql(query).withBigQuery().ok(expected);
}{code}
But I get the actual sql is
{code:java}
SELECT COUNT(*), product_id
FROM foodmart.product
GROUP BY product_id
ORDER BY product_id IS NULL DESC, product_id DESC {code}
It has redundant product_id output column.
Wage Through code, I find that the sort operator contains product_id. When I put a project with product_id only on the sort operator, the result sql has redundant subquery.
{code:java}
SELECT `EXPR$0`
FROM (SELECT COUNT(*) AS `EXPR$0`, product_id
FROM foodmart.product
GROUP BY product_id
ORDER BY product_id IS NULL DESC, product_id DESC) AS t2 {code}
was:
In RelToSqlConverterTest, I add the following case
{code:java}
@Test void testOrderByNotInSelectList() {
String query = "select count(1)\n"
+ "from \"foodmart\".\"product\"\n"
+ "group by \"product_id\"\n"
+ "order by \"product_id\" desc\n";
final String expected = "SELECT COUNT(1)\n"
+ "FROM \"foodmart\".\"product\"\n"
+ "GROUP BY \"product_id\"\n"
+ "ORDER BY \"product_id\" desc\n";
sql(query).withBigQuery().ok(expected);
}{code}
But I get the actual sql is
{code:java}
SELECT COUNT(*), product_id
FROM foodmart.product
GROUP BY product_id
ORDER BY product_id IS NULL DESC, product_id DESC {code}
It has redundant product_id output column.
Wage Through code, I find that the sort operator contains product_id. When I put a project with product_id only on the sort operator, the result sql has redundant subquery.
{code:java}
SELECT `EXPR$0`
FROM (SELECT COUNT(*) AS `EXPR$0`, product_id
FROM foodmart.product
GROUP BY product_id
ORDER BY product_id IS NULL DESC, product_id DESC) AS t2 {code}
> RelToSqlConverter adds redundant order by output column for the result sql
> --------------------------------------------------------------------------
>
> Key: CALCITE-4901
> URL: https://issues.apache.org/jira/browse/CALCITE-4901
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.26.0
> Environment: jdk8
> Reporter: yanjing.wang
> Priority: Major
>
> In RelToSqlConverterTest, I add the following case
> {code:java}
> @Test void testOrderByNotInSelectList() {
> String query = "select count(1)\n"
> + "from \"foodmart\".\"product\"\n"
> + "group by \"product_id\"\n"
> + "order by \"product_id\" desc\n";
> final String expected = "SELECT COUNT(1)\n"
> + "FROM \"foodmart\".\"product\"\n"
> + "GROUP BY \"product_id\"\n"
> + "ORDER BY \"product_id\" desc\n";
> sql(query).withBigQuery().ok(expected);
> }{code}
> But I get the actual sql is
> {code:java}
> SELECT COUNT(*), product_id
> FROM foodmart.product
> GROUP BY product_id
> ORDER BY product_id IS NULL DESC, product_id DESC {code}
> It has redundant product_id output column.
>
> Wage Through code, I find that the sort operator contains product_id. When I put a project with product_id only on the sort operator, the result sql has redundant subquery.
> {code:java}
> SELECT `EXPR$0`
> FROM (SELECT COUNT(*) AS `EXPR$0`, product_id
> FROM foodmart.product
> GROUP BY product_id
> ORDER BY product_id IS NULL DESC, product_id DESC) AS t2 {code}
>
>
--
This message was sent by Atlassian Jira
(v8.20.1#820001)