Alex Behm has posted comments on this change. ( http://gerrit.cloudera.org:8080/8975 )
Change subject: IMPALA-5310: [DOCS] Document TABLESAMPLE clause for COMPUTE STATS ...................................................................... Patch Set 3: (3 comments) http://gerrit.cloudera.org:8080/#/c/8975/3/docs/topics/impala_compute_stats.xml File docs/topics/impala_compute_stats.xml: http://gerrit.cloudera.org:8080/#/c/8975/3/docs/topics/impala_compute_stats.xml@52 PS3, Line 52: <codeblock rev="2.1.0"><ph rev="2.11.0 IMPALA-5310">COMPUTE STATS [<varname>db_name</varname>.]<varname>table_name</varname> [TABLESAMPLE SYSTEM(<varname>percentage</varname>) [REPEATABLE(<varname>seed</varname>)]]</ph> 2.12.0 http://gerrit.cloudera.org:8080/#/c/8975/3/docs/topics/impala_compute_stats.xml@82 PS3, Line 82: sample of the table data. </p> Add a reference to "Table and Column Statistics" page for more details about this command. For example, to run TABLESAMPLE you need to change the table or server configuration, and this feature is experimental. The sampling has a bunch of caveats that will be mentioned in that other page etc. http://gerrit.cloudera.org:8080/#/c/8975/3/docs/topics/impala_tablesample.xml File docs/topics/impala_tablesample.xml: http://gerrit.cloudera.org:8080/#/c/8975/3/docs/topics/impala_tablesample.xml@84 PS3, Line 84: <p rev="2.11.0 IMPALA-5310"> Version should be 2.12.0 -- To view, visit http://gerrit.cloudera.org:8080/8975 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I214b63db391bd35562f5ea9091508005f83b2fcc Gerrit-Change-Number: 8975 Gerrit-PatchSet: 3 Gerrit-Owner: John Russell <jruss...@cloudera.com> Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com> Gerrit-Reviewer: Alex Rodoni <arod...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Comment-Date: Wed, 18 Apr 2018 22:11:18 +0000 Gerrit-HasComments: Yes
