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https://issues.apache.org/jira/browse/CALCITE-4999?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Sysolyatin updated CALCITE-4999:
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Description:
At the moment query `array` function returns [RecordType ARRAY] if subquery is
passed like an argument.
{code:java}
SELECT array(select 'toast.' || x from unnest(ARRAY['1','2']) x){code}
But Sql standard says:
was:
I faced with a issue that the following query:
{code:java}
SELECT ARRAY_CONCAT(ARRAY['1', '2'], array(select 'toast.' || x from
unnest(ARRAY['1','2']) x)) {code}
didn't work, because of:
{code:java}
java.lang.IllegalArgumentException: Cannot infer return type for ARRAY_CONCAT;
operand types: [CHAR(1) ARRAY, RecordType(CHAR(7) EXPR$0) ARRAY]{code}
`least restrictive` type inference does not work when one operand is scalar and
another is row with one field
> ARRAY function should return an array of scalars if subquery returns 1 column
> -----------------------------------------------------------------------------
>
> Key: CALCITE-4999
> URL: https://issues.apache.org/jira/browse/CALCITE-4999
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Dmitry Sysolyatin
> Assignee: Dmitry Sysolyatin
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2022-02-17-11-02-50-703.png
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> At the moment query `array` function returns [RecordType ARRAY] if subquery
> is passed like an argument.
> {code:java}
> SELECT array(select 'toast.' || x from unnest(ARRAY['1','2']) x){code}
> But Sql standard says:
>
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