[jira] [Updated] (CALCITE-6306) FILTER clauses for aggregate functions are not supported in MySQL, MariaDB and StarRocks

["hongyu guo (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-6306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

hongyu guo updated CALCITE-6306:
--------------------------------
    Summary: FILTER clauses for aggregate functions are not supported in MySQL, MariaDB and StarRocks  (was: FILTER clauses for aggregate functions are not supported in MySQL, MariaDB and Starrocks)

> FILTER clauses for aggregate functions are not supported in MySQL, MariaDB and StarRocks
> ----------------------------------------------------------------------------------------
>
>                 Key: CALCITE-6306
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6306
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: hongyu guo
>            Priority: Minor
>              Labels: pull-request-available
>
> {code:sql}
> mysql> select sum(x) filter (where x = 1) from t;
> ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(where x = 1) from t' at line 1 {code}
> See details in [https://modern-sql.com/feature/filter]
> Calcite should not generate the agg() FILTER clause for the MySQL dialect. CALCITE-4321 introduced a way to convert the FILTER clause to an aggregation function with CASE.



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