[jira] [Resolved] (CALCITE-4719) Add variants of RexSubQuery that collect sub-queries into MULTISET, ARRAY and MAP collections

["Julian Hyde (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-4719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde resolved CALCITE-4719.
----------------------------------
    Resolution: Fixed

Fixed in [9c741e44|https://github.com/apache/calcite/commit/9c741e4415362c3358acea09e223d64d9b36b1ae].

> Add variants of RexSubQuery that collect sub-queries into MULTISET, ARRAY and MAP collections
> ---------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-4719
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4719
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Julian Hyde
>            Priority: Major
>             Fix For: 1.28.0
>
>
> Add variants of {{RexSubQuery}} that collect sub-queries into {{MULTISET}}, {{ARRAY}} and {{MAP}} collections. We currently use {{RexSubQuery}} for scalar sub-query, {{EXISTS}}, {{IN}} and some others; this allows us to defer conversion: convert via rewrites ({{RelOptRule}}) rather than in {{SqlToRelConverter}}. The same benefits would apply to {{MULTISET}}, {{ARRAY}} and {{MAP}} sub-queries.
> Examples:
> {code}
> SELECT deptno, MULTISET(SELECT * FROM Emp WHERE deptno = d.deptno)
> FROM Dept AS d
> SELECT deptno, ARRAY(SELECT * FROM Emp WHERE deptno = d.deptno)
> FROM Dept AS d
> SELECT deptno, MAP(SELECT empno, job FROM Emp WHERE deptno = d.deptno)
> FROM Dept AS d
> {code}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)