Sergey Nuyanzin created CALCITE-7480:
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Summary: Unparse of MATCH_RECOGNIZE with PARTITION BY or ORDER BY
produces invalid SQL
Key: CALCITE-7480
URL: https://issues.apache.org/jira/browse/CALCITE-7480
Project: Calcite
Issue Type: Bug
Components: core
Reporter: Sergey Nuyanzin
Assignee: Sergey Nuyanzin
Example of SQL
{code:sql}
SELECT *
FROM (SELECT empno, deptno from sales.emp)
MATCH_RECOGNIZE (
PARTITION BY empno
ORDER BY deptno
MEASURES
FINAL COUNT(A.deptno) AS deptno
PATTERN (A B)
DEFINE
A AS A.empno = 123
)
{code}
currently it is being unparsed as
{code:sql}
SELECT `T`.`EMPNO`, `T`.`DEPTNO`
FROM `CATALOG`.`SALES`.`EMP` AS `EMP_ALIAS` MATCH_RECOGNIZE(
PARTITION BY `*`.`EMPNO`
ORDER BY `*`.`DEPTNO`
MEASURES FINAL COUNT(`A`.`DEPTNO`) AS `DEPTNO`
PATTERN (`A` `B`)
DEFINE `A` AS PREV(`A`.`EMPNO`, 0) = 123) AS `T`
{code}
The most problem part is
{code}
PARTITION BY `*`.`EMPNO`
ORDER BY `*`.`DEPTNO`
{code}
which is not parsable anymore
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