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https://issues.apache.org/jira/browse/HIVE-4964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13749696#comment-13749696
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Edward Capriolo commented on HIVE-4964:
---------------------------------------
Also when possible avoid stack
{quote}
Stack<PartitionedTableFunctionDef> fnDefs = new
Stack<PartitionedTableFunctionDef>();
{quote}
instead use
{quote}
Deque d = new ArrayDeque()
{quote}
Stack is synchronized and has overhead. (i know some things in hive use stack
already so this is sometimes unavoidable.
> Cleanup PTF code: remove code dealing with non standard sql behavior we had
> original introduced
> -----------------------------------------------------------------------------------------------
>
> Key: HIVE-4964
> URL: https://issues.apache.org/jira/browse/HIVE-4964
> Project: Hive
> Issue Type: Bug
> Reporter: Harish Butani
> Priority: Minor
> Attachments: HIVE-4964.D11985.1.patch, HIVE-4964.D11985.2.patch
>
>
> There are still pieces of code that deal with:
> - supporting select expressions with Windowing
> - supporting a filter with windowing
> Need to do this before introducing Perf. improvements.
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