[
https://issues.apache.org/jira/browse/CALCITE-4063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ruben Q L updated CALCITE-4063:
-------------------------------
Description:
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 below)
{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$Flat1List
cannot be cast to java.lang.Integer
{code}
was:
If we run the following queries with UNNEST operator, we get the expected
results:
{code:sql}
select * from UNNEST(array[3, 4]) as T2(y);
-- y=3
-- y=4
select * from UNNEST(array[array[3], array[4]]) as T2(y)
-- y=[3]
-- y=[4]
select * from UNNEST(array[ROW(3), ROW(4)]) as T2(y)
-- y=[3]
-- y=[4]
{code}
However, if we try to combine them with a correlation with some other values,
as we could do in more realistic examples:
{{select * from dept_nested as d, UNNEST(d.employees) e2}}
The first two return the expected results, but the last one throws an exception:
{code:sql}
select * from (values (1), (2)) T1(x), UNNEST(array[3, 4]) as T2(y);
-- x=1; y=3
-- x=1; y=4
-- x=2; y=3
-- x=2; y=4
select * from (values (1), (2)) T1(x), UNNEST(array[array[3], array[4]]) as
T2(y);
-- x=1; y=[3]
-- x=1; y=[4]
-- x=2; y=[3]
-- x=2; y=[4]
select * from (values (1), (2)) T1(x), UNNEST(array[ROW(3), ROW(4)]) as T2(y);
-- ERROR!!!
-- java.lang.ClassCastException: org.apache.calcite.runtime.FlatLists$Flat1List
cannot be cast to java.lang.Integer
{code}
> Unnest an array of 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
> Priority: Major
>
> 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 below)
> {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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