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https://issues.apache.org/jira/browse/IMPALA-13005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17843793#comment-17843793
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ASF subversion and git services commented on IMPALA-13005:
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Commit 91a9dd81ccd38e2e4b975e4ddf49f97c3e01b051 in impala's branch
refs/heads/branch-4.4.0 from Michael Smith
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=91a9dd81c ]
IMPALA-13005: Create Query Live table in HMS
Creates the 'sys.impala_query_live' table in HMS using a similar 'CREATE
TABLE' command to 'sys.impala_query_log'. Updates frontend to identify a
System Table based on the '__IMPALA_SYSTEM_TABLE' property. Tables
improperly marked with '__IMPALA_SYSTEM_TABLE' will error when
attempting to scan them because no relevant scanner will be available.
Creating the table in HMS simplifies supporting 'SHOW CREATE TABLE' and
'DESCRIBE EXTENDED', so allows them for parity with Query Log.
Explicitly disables 'COMPUTE STATS' on system tables as it doesn't work
correctly.
Makes System Tables work with local catalog mode, fixing
LocalCatalogException: Unknown table type for table sys.impala_query_live
Updates workload management implementation to rely more on
SystemTables.thrift definition, and adds DCHECKs to verify completeness
and ordering.
Testing:
- adds additional test cases for changes to introspection commands
- passes existing test_query_live and test_query_log suites
Change-Id: Idf302ee54a819fdee2db0ae582a5eeddffe4a5b4
Reviewed-on: http://gerrit.cloudera.org:8080/21302
Reviewed-by: Riza Suminto <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
(cherry picked from commit 73a9ef9c4c00419b5082f355d96961c5971634d6)
> Query Live table not visible via metastore
> ------------------------------------------
>
> Key: IMPALA-13005
> URL: https://issues.apache.org/jira/browse/IMPALA-13005
> Project: IMPALA
> Issue Type: Bug
> Affects Versions: Impala 4.4.0
> Reporter: Michael Smith
> Assignee: Michael Smith
> Priority: Major
> Fix For: Impala 4.4.0
>
>
> Tools that inspect Hive Metastore to view information about tables are unable
> to see {{sys.impala_query_live}} when {{enable_workload_mgmt}} is enabled.
> This presents an inconsistent view depending on whether inspecting tables via
> Impala or Hive MetaStore.
> Register {{sys.impala_query_live}} with Hive MetaStore, similar to what
> {{sys.impala_query_log}} does, to make table listing consistent.
> It also doesn't work with local catalog mode.
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