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https://issues.apache.org/jira/browse/PHOENIX-1237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vaclav Loffelmann updated PHOENIX-1237:
---------------------------------------
    Attachment: PHOENIX-1237.fix2.patch

I've did some changes, but I'm not sure if is it right by your design. I've 
append some tests too.
Thanks

> COALESCE Function - type of second parameter
> --------------------------------------------
>
>                 Key: PHOENIX-1237
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1237
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 5.0.0, 3.1, 4.1
>            Reporter: Vaclav Loffelmann
>            Assignee: Vaclav Loffelmann
>         Attachments: PHOENIX-1237.fix.patch, PHOENIX-1237.fix2.patch, 
> PHOENIX_1237.patch
>
>
> There is an issue with automatic set data type of second parameter to 
> coalesce function.
> For instance table:
> {code:sql}
> CREATE TABLE IF NOT EXISTS TEST_COALESCE(
> ID BIGINT NOT NULL,
> COUNT UNSIGNED_INT
> CONSTRAINT pk PRIMARY KEY(ID));
> {code}
> and query:
> {code:sql}
> SELECT COALESCE(SUM(COUNT), 0) FROM TEST_SUM GROUP BY ID;
> {code}
> This will cause in:
> {quote}SQLException: ERROR 507 (42846): Cannot convert type. COALESCE 
> expected UNSIGNED_INT, but got INTEGER {quote}
> Hence second parameter is typed to its input value (eg. 0 is signed int not 
> long), and long is expected. That is cause for ArrayIndexOutOfBoundsException 
> described in PHOENIX-1229.



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