[
https://issues.apache.org/jira/browse/CALCITE-600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326680#comment-14326680
]
Vladimir Sitnikov edited comment on CALCITE-600 at 2/18/15 10:56 PM:
---------------------------------------------------------------------
[~jcamachorodriguez], can you please clarify who creates HiveUnion in the first
place?
Can't you perform basic optimizations in {{Logical*}} relations?
{quote}HiveUnion operator that extends Union. I would like to use the
UnionMerge rule in Hive. Without this extension, the only solution is to extend
the rule and rewrite the match (and possibly transform{quote}
I do not follow you. UnionMergeRule operates on LogicalUnions. Eventually (I
guess) those LogicalUnions lower to HiveUnion.
UnionMergeRule will not fire for HiveUnion unless your HiveUnion extends
LogicalUnion (however I see little sense in it).
was (Author: vladimirsitnikov):
[~jcamachorodriguez], can you please clarify who creates HiveUnion?
Can't you perform basic optimizations in {{Logical*}} relations?
{quote}HiveUnion operator that extends Union. I would like to use the
UnionMerge rule in Hive. Without this extension, the only solution is to extend
the rule and rewrite the match (and possibly transform{quote}
I do not follow you. UnionMergeRule operates on LogicalUnions. Eventually those
LogicalUnions lower to HiveUnion.
It will not fire for HiveUnion unless your HiveUnion extends LogicalUnion
(however I see little sense in it).
> Create UnionFactory and use in rules containing Union operator
> --------------------------------------------------------------
>
> Key: CALCITE-600
> URL: https://issues.apache.org/jira/browse/CALCITE-600
> Project: Calcite
> Issue Type: Bug
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
>
> Union related rules match on {{LogicalUnion}} and use this implementation to
> create the new Union operators. As it is done for other rules, a Union
> factory can be created and used by them, so subclasses that extend Union can
> use the rules.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
