[jira] [Created] (CALCITE-2787) Json aggregate calls with different null clause get incorrectly merged during converting from sql to rel

[Hongze Zhang (JIRA)]

Hongze Zhang created CALCITE-2787:
-------------------------------------

             Summary: Json aggregate calls with different  null clause get 
incorrectly merged during converting from sql to rel
                 Key: CALCITE-2787
                 URL: https://issues.apache.org/jira/browse/CALCITE-2787
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.18.0
            Reporter: Hongze Zhang
            Assignee: Julian Hyde


SQL:
 
{code:sql}
WITH tab(x) AS (VALUES 1, 2, 1, CAST(NULL AS INTEGER))
SELECT JSON_ARRAYAGG(x), JSON_ARRAYAGG(x NULL ON NULl) FROM tab
{code}

Produces:

{code}
EXPR$0  |EXPR$1  |
--------|--------|
[1,2,1] |[1,2,1] |
{code}

Should be:

{code}
EXPR$0  |EXPR$1  |
--------|--------|
[1,2,1] |[1,2,1,null] |
{code}




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