[jira] [Commented] (IGNITE-1142) Use temporary tables instead of table function.

["Sergi Vladykin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-1142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14652180#comment-14652180 ] 

Sergi Vladykin commented on IGNITE-1142:
----------------------------------------

Decided not to use temporary tables (it will not be fast to create/drop them) instead implemented ThreadLocal based Table wrapper for MergeTables . We will have an on demand growing list of these thread local table wrappers each of them will hold actual MergeTable for reduce query. It will allow to create and drop them really fast.

Also implemented some optimizations related to expression result type calculation in queries (calculate types only for expressions in SELECT clause) and got rid of additional face of query parsing.

> Use temporary tables instead of table function.
> -----------------------------------------------
>
>                 Key: IGNITE-1142
>                 URL: https://issues.apache.org/jira/browse/IGNITE-1142
>             Project: Ignite
>          Issue Type: Wish
>            Reporter: Sergi Vladykin
>            Assignee: Sergi Vladykin
>
> See TODOs in Splitter



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