[jira] [Created] (CALCITE-5127) Error when executing query with subquery in select list that uses outer column of array type

[Dmitry Sysolyatin (Jira)]

Dmitry Sysolyatin created CALCITE-5127:
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             Summary: Error when executing query with subquery in select list 
that uses outer column of array type
                 Key: CALCITE-5127
                 URL: https://issues.apache.org/jira/browse/CALCITE-5127
             Project: Calcite
          Issue Type: Bug
            Reporter: Dmitry Sysolyatin


The following queries fail:
{code}
CalciteAssert.that()
        .query("SELECT ARRAY(SELECT s.x)\n" +
            "FROM (SELECT ARRAY[1,2,3] as x) s")
        .returnsCount(1);

    CalciteAssert.that()
        .query("SELECT ARRAY(SELECT * FROM UNNEST(s.x) y)\n" +
            "FROM (SELECT ARRAY[1,2,3] as x) s")
        .returnsCount(1);

    CalciteAssert.that()
        .query("SELECT (SELECT CARDINALITY(s.x) LIMIT 1)\n" +
            "FROM (SELECT ARRAY[1,2,3] as x) s")
        .returnsUnordered("EXPR$0=3");
{code}

With exception:
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to 
java.util.List

You can find test cases for this task in 
https://github.com/apache/calcite/commit/27e68ded2c3bea7d7af73dd1dc156e46fb3591a8



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