[
https://issues.apache.org/jira/browse/HIVE-16022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15888524#comment-15888524
]
Deepak Jaiswal commented on HIVE-16022:
---------------------------------------
As Jason mentioned, the check was added because semijoin reduction does not
work properly with partition column, the reason being, it is not a real column
but a logical one.
The logic expects a real column to compute min and max.
Aslo, there can never be parallel DPP and semijoin branches by design as they
are created in if ...else if... block.
> BloomFilter check not showing up in MERGE statement queries
> -----------------------------------------------------------
>
> Key: HIVE-16022
> URL: https://issues.apache.org/jira/browse/HIVE-16022
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Reporter: Jason Dere
> Assignee: Jason Dere
> Fix For: 2.2.0
>
> Attachments: HIVE-16022.1.patch, HIVE-16022.2.patch,
> HIVE-16022.3.patch, HIVE-16022.4.patch
>
>
> Running explain on a MERGE statement with runtime filtering enabled, I see
> the min/max being applied on the large table, but not the bloom filter check:
> {noformat}
> explain merge into acidTbl as t using nonAcidOrcTbl s ON t.a = s.a
> WHEN MATCHED AND s.a > 8 THEN DELETE
> WHEN MATCHED THEN UPDATE SET b = 7
> WHEN NOT MATCHED THEN INSERT VALUES(s.a, s.b)
> ...
> Map 1
> Map Operator Tree:
> TableScan
> alias: t
> Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL
> Column stats: NONE
> Filter Operator
> predicate: a BETWEEN DynamicValue(RS_3_s_a_min) AND
> DynamicValue(RS_3_s_a_max) (type: boolean)
> Statistics: Num rows: 1 Data size: 0 Basic stats: PARTIAL
> Column stats: NONE
> {noformat}
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
