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Posted to issues@calcite.apache.org by "Ruben Q L (Jira)" <ji...@apache.org> on 2020/06/20 17:32:00 UTC
[jira] [Resolved] (CALCITE-4063) Unnest an array of single-item
structs causes ClassCastException
[ https://issues.apache.org/jira/browse/CALCITE-4063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ruben Q L resolved CALCITE-4063.
--------------------------------
Fix Version/s: 1.24.0
Resolution: Fixed
Fixed by https://github.com/apache/calcite/commit/797b48754d074d53e853a67bf249c155f51b71dc
Thanks [~mmior] for your help!
> Unnest an array of single-item structs causes ClassCastException
> ----------------------------------------------------------------
>
> Key: CALCITE-4063
> URL: https://issues.apache.org/jira/browse/CALCITE-4063
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.23.0
> Reporter: Ruben Q L
> Assignee: Ruben Q L
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.24.0
>
> Attachments: DynamicCode.java
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> If we run the following queries with UNNEST operator, we get the expected results:
> {code:sql}
> select * from UNNEST(array[3, 4]) as T2(y);
> -- y=3
> -- y=4
> select * from UNNEST(array[array[3], array[4]]) as T2(y)
> -- y=[3]
> -- y=[4]
> select * from UNNEST(array[ROW(3), ROW(4)]) as T2(y)
> -- y=[3]
> -- y=[4]
> -- Is this result ok? (see first comment of the current ticket)
> {code}
> However, if we try to combine them with a correlation with some other values, as we could do in more realistic examples:
> {{select * from dept_nested as d, UNNEST(d.employees) e2}}
> The first two return the expected results, but the last one throws an exception:
> {code:sql}
> select * from (values (1), (2)) T1(x), UNNEST(array[3, 4]) as T2(y);
> -- x=1; y=3
> -- x=1; y=4
> -- x=2; y=3
> -- x=2; y=4
> select * from (values (1), (2)) T1(x), UNNEST(array[array[3], array[4]]) as T2(y);
> -- x=1; y=[3]
> -- x=1; y=[4]
> -- x=2; y=[3]
> -- x=2; y=[4]
> select * from (values (1), (2)) T1(x), UNNEST(array[ROW(3), ROW(4)]) as T2(y);
> -- ERROR!!!
> -- java.lang.ClassCastException: org.apache.calcite.runtime.FlatLists$Flat1List cannot be cast to java.lang.Integer
> {code}
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