phoenix-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-4232) Hide shadow cell and commit table access in TAL
Date Mon, 25 Sep 2017 20:01:00 GMT
James Taylor created PHOENIX-4232:
-------------------------------------

             Summary: Hide shadow cell and commit table access in TAL
                 Key: PHOENIX-4232
                 URL: https://issues.apache.org/jira/browse/PHOENIX-4232
             Project: Phoenix
          Issue Type: Bug
            Reporter: James Taylor


Omid needs to project the shadow cell column qualifier and then based on the value, filter
the row. If the shadow cell is not found, it needs to perform a lookup in the commit table
(the source of truth) to get the information instead. For the Phoenix integration, there are
likely two TAL methods that can be added to handle this:
# Add method call to new TAL method in preScannerOpen call on coprocessor that projects the
shadow cell qualifiers and sets the time range. This is equivalent to the TransactionProcessor.preScannerOpen
that Tephra does. It's possible this work could be done on the client side as well, but it's
more likely that the stuff that Phoenix does may override this (but we could get it to work
if need be).
# Add TAL method that returns a RegionScanner to abstract out the filtering of the row (potentially
querying commit table). This RegionScanner would be added as the first in the chain in the
NonAggregateRegionScannerFactory.getRegionScanner() API.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Mime
View raw message