Sergey Nuyanzin created CALCITE-7471:
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Summary: Alias is not auto generated for MATCH_RECOGNIZE
Key: CALCITE-7471
URL: https://issues.apache.org/jira/browse/CALCITE-7471
Project: Calcite
Issue Type: Bug
Components: core
Reporter: Sergey Nuyanzin
Assignee: Sergey Nuyanzin
In case of enabled {{identifierExpansion}} the query
{code:sql}
SELECT *
FROM emp
MATCH_RECOGNIZE (
MEASURES
FINAL COUNT(A.deptno) AS deptno
PATTERN (A B)
DEFINE
A AS A.empno = 123
)
{code}
is unparsed as
{code:sql}
SELECT `EXPR$0`.`DEPTNO`
FROM `CATALOG`.`SALES`.`EMP` AS `EMP` MATCH_RECOGNIZE(
MEASURES FINAL COUNT(`A`.`DEPTNO`) AS `DEPTNO`
PATTERN (`A` `B`)
DEFINE `A` AS PREV(`A`.`EMPNO`, 0) = 123)
{code}
so the result SQL is invalid since {{`EXPR$0`}} is not defined anywhere
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