Sergey Nuyanzin created CALCITE-7466:
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Summary: Unparse of MATCH_RECOGNIZE produces duplicate aliases
Key: CALCITE-7466
URL: https://issues.apache.org/jira/browse/CALCITE-7466
Project: Calcite
Issue Type: Bug
Components: core
Reporter: Sergey Nuyanzin
Assignee: Sergey Nuyanzin
Could be reproduced with any {{MATCH_RECOGNIZE}} query
for instance
{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}
is being rewritten to
{code:sql}
SELECT *
FROM `EMP` MATCH_RECOGNIZE(
MEASURES FINAL COUNT(`A`.`DEPTNO`) AS `DEPTNO` AS `DEPTNO`
PATTERN (`A` `B`)
DEFINE `A` AS (PREV(`A`.`EMPNO`, 0) = 123 AS `A`)) AS `T`
{code}
where {{AS `DEPTNO` AS `DEPTNO`}} is duplicated
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