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https://issues.apache.org/jira/browse/CALCITE-6847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17928624#comment-17928624
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xiong duan commented on CALCITE-6847:
-------------------------------------
Firstly, The two SQL examples above are identical. Please recheck and confirm.
Secondly, it is necessary to verify whether ClickHouse supports the query
`SELECT 1=1`. Please cover this test case in the test scenarios. In
CALCITE-6919, MSSQL does not support this query.
> Support ClickHouse Dialect with join on Boolean type
> ----------------------------------------------------
>
> Key: CALCITE-6847
> URL: https://issues.apache.org/jira/browse/CALCITE-6847
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.38.0
> Reporter: Yu Xu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.39.0
>
>
> Currently ClickHouseSQL Dialect not support join on boolean type in
> Calcite，but most system support with the syntax, so need to support it.
> syntax like:
> select A.id, B.name, B.address from A left join B on true;
> *query as on true:*
> default> select a.id
> from
> `default`.example_table2 as a
> left join mincho_test.example_table2 as b on true
> [2025-02-19 23:36:04] Code: 403, e.displayText() = DB::Exception: Cannot get
> JOIN keys from JOIN ON section: true (version 21.8.7.22 (official build))
>
> *query as on 1=1:*
> default> select a.id
> from
> `default`.example_table1 as a
> left join `default`.example_table2 as b on true
> [2025-02-19 23:45:50] 18 rows retrieved starting from 1 in 125 ms (execution:
> 105 ms, fetching: 20 ms)
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