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https://issues.apache.org/jira/browse/TRAFODION-2127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15609962#comment-15609962
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ASF GitHub Bot commented on TRAFODION-2127:
-------------------------------------------
Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/772#discussion_r85231158
--- Diff: core/sql/generator/GenRelScan.cpp ---
@@ -1119,7 +1124,8 @@ short FileScan::codeGenForHive(Generator * generator)
if (expirationTimestamp > 0)
expirationTimestamp += 1000000 *
(Int64) CmpCommon::getDefaultLong(HIVE_METADATA_REFRESH_INTERVAL);
- generator->setPlanExpirationTimestamp(expirationTimestamp);
+ if (!getCommonSubExpr())
+ generator->setPlanExpirationTimestamp(expirationTimestamp);
--- End diff --
Could you explain what a plan expiration timestamp is? (not in the code
necessarily... but in a reply comment maybe?)
> enhance Trafodion implementation of WITH clause
> -----------------------------------------------
>
> Key: TRAFODION-2127
> URL: https://issues.apache.org/jira/browse/TRAFODION-2127
> Project: Apache Trafodion
> Issue Type: Improvement
> Reporter: liu ming
> Assignee: Hans Zeller
>
> TRAFODION-1673 described some details about how to support WITH clause in
> Trafodion.
> As initial implementation, we use a simple pure-parser method.
> That way, Trafodion can support WITH clause functionally, but not good from
> performance point of view,
> also need to enhance the parser to be more strict in syntax.
> This JIRA is a follow up JIRA, to track following effort to support Trafodion
> WITH clause.
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