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From "hsj (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (HIVE-17634) Estimate the column stats even not retrieve columns from metastore(hive.stats.fetch.column.stats as false)
Date Fri, 29 Sep 2017 21:33:01 GMT

     [ https://issues.apache.org/jira/browse/HIVE-17634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

hsj updated HIVE-17634:
-----------------------
    Comment: was deleted

(was: [~vgarg]: thanks for review. Now trigger the test.)

> Estimate the column stats even not retrieve columns from metastore(hive.stats.fetch.column.stats
as false)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-17634
>                 URL: https://issues.apache.org/jira/browse/HIVE-17634
>             Project: Hive
>          Issue Type: Bug
>            Reporter: liyunzhang_intel
>            Assignee: liyunzhang_intel
>         Attachments: HIVE-17634.1.patch, HIVE-17634.patch
>
>
> in [RelOptHiveTable#updateColStats|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/RelOptHiveTable.java#L309],
we set {{fetchColStats}},{{fetchPartStats}} as true when call {{StatsUtils.collectStatistics}}
> {code}
>    if (!hiveTblMetadata.isPartitioned()) {
>         // 2.1 Handle the case for unpartitioned table.
>         try {
>           Statistics stats = StatsUtils.collectStatistics(hiveConf, null,
>               hiveTblMetadata, hiveNonPartitionCols, nonPartColNamesThatRqrStats,
>               colStatsCached, nonPartColNamesThatRqrStats, true, true);
>       ...
> {code}
> This will cause querying columns statistic from metastore even we set  {{hive.stats.fetch.column.stats}}
and {{hive.stats.fetch.partition.stats}} as false in HiveConf.  If we these two properties
as false, we can not any column statistics from metastore.  Suggest to set the properties
from HiveConf. 



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