[ 
https://issues.apache.org/jira/browse/CALCITE-6007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Julian Hyde resolved CALCITE-6007.
----------------------------------
    Fix Version/s: 1.36.0
       Resolution: Fixed

Fixed in 
[1245db6|https://github.com/apache/calcite/commit/1245db620114ee5174641ad540af6b27dcd772e3];
 thanks for the PR, [~wenruimeng]!

> CTE as subquery without alias doesn't have correct alias setup
> --------------------------------------------------------------
>
>                 Key: CALCITE-6007
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6007
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.34.0, 1.35.0
>            Reporter: Wenrui Meng
>            Assignee: Wenrui Meng
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.36.0
>
>
> {code:java}
> SELECT
>   a,
>   b
> FROM (
>   WITH
>     sub AS (
>     SELECT
>       1 AS a,
>       2 AS b)
>   SELECT
>     *
>   FROM
>     sub)
> WHERE
>   a IS NOT null
> {code}
> It will generate the following SQL statement after validation
> {code:java}
> SELECT
>   EXPR$0.a,
>   EXPR$0.b
> FROM (
>   WITH
>     sub AS (
>     SELECT
>       1 AS a,
>       2 AS b)
>   SELECT
>     sub.a AS a, sub.b AS b
>   FROM
>     sub)
> WHERE
>   EXPR$0.a IS NOT null
> {code}
> The validated SQL become invalid since there is no EXPR$0 alias append for 
> the SqlWith sub query but used in the expression outside. 



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