[jira] [Commented] (HAWQ-1111) Support for IN() operator in PXF

["Oleksandr Diachenko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HAWQ-1111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15589936#comment-15589936 ] 

Oleksandr Diachenko commented on HAWQ-1111:
-------------------------------------------

As for now HAWQ bridge supports only scalar constant in filter push-down. To support IN operator list constants also needs to be implemented.
Convention for
* scalar constant:
** c<constant data type>s<number of bytes for constant>d<bytes>
* list constant(multiple values):
** m<data type of list items>s<number of item1>d<bytes for item1>s<number of item2>d<bytes for item2>...s<number of itemN>d<bytes for itemN>

> Support for IN() operator in PXF
> --------------------------------
>
>                 Key: HAWQ-1111
>                 URL: https://issues.apache.org/jira/browse/HAWQ-1111
>             Project: Apache HAWQ
>          Issue Type: New Feature
>          Components: PXF
>            Reporter: Vineet Goel
>            Assignee: Lei Chang
>
> HAWQ PXF external tables should be optimized for IN() operator so that users get the benefit of predicate pushdown. In order to achieve this, HAWQ bridge must send serialized expression for IN() operator to PXF. 



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