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https://issues.apache.org/jira/browse/IMPALA-5308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17062041#comment-17062041
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ASF subversion and git services commented on IMPALA-5308:
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Commit 7dd13f72784514a59f82c9a7a5e2250503dbfaf0 in impala's branch
refs/heads/master from Tamas Mate
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=7dd13f7 ]
IMPALA-5308: Resolve confusing Kudu SHOW TABLE STATS output
This change modifies the output of the SHOW TABLE STATS and SHOW
PARTITIONS for Kudu tables.
- PARTITIONS: the #Row column has been removed
- TABLE STATS: instead of showing partition informations it returns a
resultset similar to HDFS table stats, #Rows, #Partitions, Size, Format
and Location
Example outputs can be seen in the doc changes.
Testing:
* kudu_stats.test is modified to verify the new result set
* kudu_partition_ddl.test is modified to verify the new partitions style
* Updated unit test with the new error message
Change-Id: Ice4b8df65f0a53fe14b8fbe35d82c9887ab9a041
Reviewed-on: http://gerrit.cloudera.org:8080/15199
Reviewed-by: Thomas Tauber-Marshall <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> SHOW TABLE STATS for Kudu tables is confusing
> ---------------------------------------------
>
> Key: IMPALA-5308
> URL: https://issues.apache.org/jira/browse/IMPALA-5308
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Affects Versions: Impala 2.8.0
> Reporter: Matthew Jacobs
> Assignee: Tamas Mate
> Priority: Major
> Labels: kudu
>
> SHOW TABLE STATS for Kudu tables shows all Kudu tablets and explicitly shows
> the #rows are -1, because we don't support per-partition or per-tablet stats
> (see IMPALA-2830).
> However, we do have table statistics (# rows) and that doesn't show up in the
> SHOW TABLE STATS output, which is confusing. The table stats does show up in
> the DESCRIBE EXTENDED output.
> {code}
> [localhost:21000] > show table stats tdata;
> Query: show table stats tdata
> +--------+-----------+----------+----------------------------------+------------+
> | # Rows | Start Key | Stop Key | Leader Replica | #
> Replicas |
> +--------+-----------+----------+----------------------------------+------------+
> | -1 | | 00000001 | mj-desktop.ca.cloudera.com:31201 | 3
> |
> | -1 | 00000001 | 00000002 | mj-desktop.ca.cloudera.com:31202 | 3
> |
> | -1 | 00000002 | | mj-desktop.ca.cloudera.com:31201 | 3
> |
> +--------+-----------+----------+----------------------------------+------------+
> Fetched 3 row(s) in 0.02s
> [localhost:21000] > describe extended tdata;
> Query: describe extended tdata
> +------------------------------+-------------------------------------------------+-------------------------------------------+
> | name | type
> | comment |
> +------------------------------+-------------------------------------------------+-------------------------------------------+
> | # col_name | data_type
> | comment |
> | | NULL
> | NULL |
> | id | int
> | NULL |
> ...
> |
> | | NULL
> | NULL |
> | # Detailed Table Information | NULL
> | NULL |
> | Database: | default
> | NULL |
> | Owner: | mj
> | NULL |
> | CreateTime: | Mon May 08 11:16:29 PDT 2017
> | NULL |
> | LastAccessTime: | UNKNOWN
> | NULL |
> | Protect Mode: | None
> | NULL |
> | Retention: | 0
> | NULL |
> | Location: | hdfs://localhost:20500/test-warehouse/tdata
> | NULL |
> | Table Type: | MANAGED_TABLE
> | NULL |
> | Table Parameters: | NULL
> | NULL |
> | | DO_NOT_UPDATE_STATS
> | true |
> | | STATS_GENERATED_VIA_STATS_TASK
> | true |
> | | kudu.master_addresses
> | 127.0.0.1 |
> | | kudu.table_name
> | impala::default.tdata |
> | ==========> | numRows | 1500
> |
> {code}
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