trafodion-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Anoop Sharma <anoop.sha...@esgyn.com>
Subject RE: is there a file or a documentation describing alignFormat
Date Tue, 29 Mar 2016 21:36:37 GMT
look at   sql/exp/ExpAlignedFormat.h  for details.

anoop

-----Original Message-----
From: Eric Owhadi [mailto:eric.owhadi@esgyn.com]
Sent: Tuesday, March 29, 2016 2:20 PM
To: dev@trafodion.incubator.apache.org
Subject: is there a file or a documentation describing alignFormat

Hi Trafodioneers,

I am looking at 2 potentially low hanguing fruit optimization with
alignFormat:

-          Provide some predicate pushdown support, when columns in
predicate are not nullable or not variable length or not added columns.

-          See if we can implement a customFilter to silence nullable
columns, variable length column, or added column that are not needed by the
scan node using the transformCell() step in customFilters…



For these, I need to understand the internal coding of alignFormat…

Would appreciate a pointer on documentation or source file that would
enlighten me on this…

Thanks,
Eric

Mime
View raw message