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https://issues.apache.org/jira/browse/CALCITE-7471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sergey Nuyanzin updated CALCITE-7471:
-------------------------------------
Description:
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
expected query is
{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) AS `EXPR$0`
{code}
was:
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
> 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
> Priority: Major
> Labels: pull-request-available
>
> 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
> expected query is
> {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) AS `EXPR$0`
> {code}
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