[jira] [Commented] (HAWQ-403) Nested decode fails when inner decode return null

["Karthikeyan Jambu Rajaraman (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HAWQ-403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15143655#comment-15143655 ] 

Karthikeyan Jambu Rajaraman commented on HAWQ-403:
--------------------------------------------------

Issue is fixed and pushed to Hawq master and 1.3

> Nested decode fails when inner decode return null
> -------------------------------------------------
>
>                 Key: HAWQ-403
>                 URL: https://issues.apache.org/jira/browse/HAWQ-403
>             Project: Apache HAWQ
>          Issue Type: Bug
>          Components: Query Execution
>            Reporter: Karthikeyan Jambu Rajaraman
>            Assignee: George Caragea
>
> Nested decode fails when inner decode return null. 
> E.g.
> ---
> --- Drop existing table
> ---
> DROP TABLE IF EXISTS t;
> ---
> --- Create new table t
> ---
> CREATE TABLE t(pid INT, wid INT, state CHARACTER VARYING(30));
> ---
> --- Insert a row and keep state as empty
> ---
> INSERT INTO t VALUES(1, 1);
> ---
> --- use nested decode
> ---
> SELECT DECODE(DECODE(state, '', NULL, state), '-', NULL, state) AS state FROM t;



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