Ruben Q L created CALCITE-4063:
----------------------------------
Summary: Correlate with 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
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 the 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}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
