[jira] [Created] (CALCITE-5137) EnumerableUncollect throws NPE if input has ((List) null)

[Dmitry Sysolyatin (Jira)]

Dmitry Sysolyatin created CALCITE-5137:
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             Summary: EnumerableUncollect throws NPE if input has ((List) null)
                 Key: CALCITE-5137
                 URL: https://issues.apache.org/jira/browse/CALCITE-5137
             Project: Calcite
          Issue Type: Bug
          Components: core, linq4j
            Reporter: Dmitry Sysolyatin
            Assignee: Dmitry Sysolyatin


EnumerableUncollect throws NPE when an input has element = ((List) null)

Example:
{code}
SELECT * FROM UNNEST(CAST(null AS INTEGER ARRAY))
{code}

In a real situation, it can appear if to use left join. For example:
{code}
SELECT ARRAY(SELECT * FROM UNNEST(t.x)) FROM (VALUES(1)) LEFT JOIN (SELECT 
ARRAY[1] as x, 2 as y) t ON t.y = 1
{code}



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