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https://issues.apache.org/jira/browse/CALCITE-6819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17928413#comment-17928413
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xiong duan commented on CALCITE-6819:
-------------------------------------

Fixed in 
[dd49d9f|https://github.com/apache/calcite/commit/dd49d9f7357c6f1ce34fdcdb765637a970d80eef].
 Thanks for the contribution [~sreeharsha_r]. Thanks for the review 
[~suibianwanwan33] .

> MSSQL doesn't support TRUE/FALSE keywords in its Join predicate
> ---------------------------------------------------------------
>
>                 Key: CALCITE-6819
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6819
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Sree Harsha Ramanavarapu
>            Priority: Major
>              Labels: pull-request-available
>
> CREATE TABLE t1 (c11 int, c12 int);
> INSERT INTO t1 VALUES (1,10), (2,20), (3,30);
> CREATE TABLE t2 (c21 int, c22 int);
> SELECT * FROM t1 LEFT OUTER JOIN t2 ON TRUE;
> Msg 4145, Level 15, State 1, Server a08c6f7cfc77, Line 9
> An expression of non-boolean type specified in a context where a condition is 
> expected, near ';'.
> TRUE/FALSE are not supported in MSSQL (but it is supported in most DBs). 
> The MSSQL way would be to write the query as :
> SELECT * FROM t1 LEFT OUTER JOIN t2 ON 1=1;
> MSSQL dialect should support this syntax.



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