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https://issues.apache.org/jira/browse/CALCITE-6063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17777750#comment-17777750
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Ran Tao edited comment on CALCITE-6063 at 10/20/23 1:00 PM:
------------------------------------------------------------
FYI, before calcite-1.35, array/multiset/map sub-query all only support limited
query such as {*}select ... from ...{*}, or with optional {*}where{*}.
the array allows *OrderBy* was intrdoced by this
[https://github.com/apache/calcite/pull/3141] PR by mistake (The processing
here is just to receive all args to support this 'array()' function form rather
than support *OrderBy* or {*}LIMIT{*}). It accept all exprs.
and there is no test case to cover it. we need this ticket to refine this if we
decide to support it.
btw, the sql-standard-2003, 6.36 allows array query with {*}OrderBy{*}:
{code:java}
<array value constructor by query> ::=
ARRAY <left paren> <query expression> [ <order by clause> ] <right paren>
{code}
was (Author: lemonjing):
FYI, before calcite-1.35, array/multiset/map sub-query all only supports
limited query such as *select ... from ...*, or with optional *where*.
the array allows *OrderBy* was intrdoced by this
[https://github.com/apache/calcite/pull/3141] PR by mistake (The processing
here is just to receive all args to support this 'array()' function form rather
than support *OrderBy* or {*}LIMIT{*}). It accept all exprs.
and there is no test case to cover it. we need this ticket to refine this if we
decide to support it.
btw, the sql-standard-2003, 6.36 allows array query with {*}OrderBy{*}:
{code}
<array value constructor by query> ::=
ARRAY <left paren> <query expression> [ <order by clause> ] <right paren>
{code}
> ARRAY sub-query with OrderBy return unexpected results
> ------------------------------------------------------
>
> Key: CALCITE-6063
> URL: https://issues.apache.org/jira/browse/CALCITE-6063
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.35.0
> Reporter: Ran Tao
> Priority: Major
>
> calcite support array query constructor.
> but If we run sub-query with orderby:
> {code:java}
> select array(select x from unnest(array[1,2,3]) as t(x) order by x desc);
> select array(select x from unnest(array[1,2,3]) as t(x) order by x asc);
> {code}
> they both return
> {code:java}
> +-----------+
> | EXPR$0 |
> +-----------+
> | [1, 2, 3] |
> +-----------+
> {code}
> however, we expect return *[3, 2, 1]* when use {*}order by x desc{*}.
> It seems that the *order by* not works properly in array sub-query.
>
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