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https://issues.apache.org/jira/browse/CALCITE-7470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18072955#comment-18072955
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Sergey Nuyanzin commented on CALCITE-7470:
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Merged as
[27a9d05fd79dd3114a70f27d42c0a6ee4590249e|https://github.com/apache/calcite/commit/27a9d05fd79dd3114a70f27d42c0a6ee4590249e]
> Unparse of DEFINE in MATCH_RECOGNIZE leads to incorrect SQL
> -----------------------------------------------------------
>
> Key: CALCITE-7470
> URL: https://issues.apache.org/jira/browse/CALCITE-7470
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Sergey Nuyanzin
> Assignee: Sergey Nuyanzin
> Priority: Major
> Labels: pull-request-available
>
> Example of query
> {code:sql}
> SELECT *
> FROM emp
> MATCH_RECOGNIZE (
> MEASURES
> FINAL COUNT(A.deptno) AS deptno
> PATTERN (A B)
> DEFINE
> A AS A.empno = 123
> ) AS T
> {code}
> rewrites to
> {code:sql}
> SELECT *
> FROM `EMP` MATCH_RECOGNIZE(
> MEASURES FINAL COUNT(`A`.`DEPTNO`) AS `DEPTNO`
> PATTERN (`A` `B`)
> DEFINE `A` AS (PREV(`A`.`EMPNO`, 0) = 123 AS `A`)) AS `T`
> {code}
> where {{DEFINE `A` AS (PREV(`A`.`EMPNO`, 0) = 123 AS `A`)}} contains 2 {{AS}}
> operators and fails after parsing again
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