You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@calcite.apache.org by "xiong duan (Jira)" <ji...@apache.org> on 2023/05/18 13:21:00 UTC
[jira] [Updated] (CALCITE-5711) Implement the SINGLE_VALUE aggregation in PostgreSQL Dialect
[ https://issues.apache.org/jira/browse/CALCITE-5711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
xiong duan updated CALCITE-5711:
--------------------------------
Description:
When we use the SQL include the scalar query for example:
{code:java}
select * from table where id = (select code from table){code}
Convert this SQL Rel to PostgreSQL will include the SINGLE_VALUE aggregation function(PostgreSQL can't handle it) in the dialect SQL.
Input SQL:
{code:java}
select "product_class_id" as c
from "product" where "brand_name" = (select "product_name" from "product") {code}
PostgreSQL Dialect will generate SQL:
{code:java}
SELECT "product"."product_class_id" AS "C"
FROM "foodmart"."product"
LEFT JOIN (SELECT CASE COUNT("product_name") WHEN 0 THEN NULL WHEN 1 THEN MIN("product_name") ELSE (SELECT CAST(NULL AS VARCHAR(60))
UNION ALL
SELECT CAST(NULL AS VARCHAR(60))) END AS "$f0"
FROM "foodmart"."product") AS "t0" ON TRUE
WHERE "product"."brand_name" = "t0"."$f0" {code}
was:
When we use the SQL include the scalar query for example:
{code:java}
select * from table where id = (select code from table){code}
Convert this SQL Rel to PostgreSQL will include the SINGLE_VALUE aggregation function(PostgreSQL can't handle it) in the dialect SQL.
> Implement the SINGLE_VALUE aggregation in PostgreSQL Dialect
> ------------------------------------------------------------
>
> Key: CALCITE-5711
> URL: https://issues.apache.org/jira/browse/CALCITE-5711
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.34.0
> Reporter: xiong duan
> Assignee: xiong duan
> Priority: Major
> Fix For: 1.35.0
>
>
> When we use the SQL include the scalar query for example:
> {code:java}
> select * from table where id = (select code from table){code}
> Convert this SQL Rel to PostgreSQL will include the SINGLE_VALUE aggregation function(PostgreSQL can't handle it) in the dialect SQL.
> Input SQL:
> {code:java}
> select "product_class_id" as c
> from "product" where "brand_name" = (select "product_name" from "product") {code}
> PostgreSQL Dialect will generate SQL:
> {code:java}
> SELECT "product"."product_class_id" AS "C"
> FROM "foodmart"."product"
> LEFT JOIN (SELECT CASE COUNT("product_name") WHEN 0 THEN NULL WHEN 1 THEN MIN("product_name") ELSE (SELECT CAST(NULL AS VARCHAR(60))
> UNION ALL
> SELECT CAST(NULL AS VARCHAR(60))) END AS "$f0"
> FROM "foodmart"."product") AS "t0" ON TRUE
> WHERE "product"."brand_name" = "t0"."$f0" {code}
--
This message was sent by Atlassian Jira
(v8.20.10#820010)