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https://issues.apache.org/jira/browse/SPARK-39043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-39043:
------------------------------------
Assignee: Apache Spark
> Hive client should not gather statistic by default.
> ---------------------------------------------------
>
> Key: SPARK-39043
> URL: https://issues.apache.org/jira/browse/SPARK-39043
> Project: Spark
> Issue Type: Task
> Components: SQL
> Affects Versions: 3.1.2, 3.2.0, 3.3.0
> Reporter: angerszhu
> Assignee: Apache Spark
> Priority: Major
>
> When use `InsertIntoHiveTable`, when insert overwrite partition, it will call
> Hive.loadPartition(), in this method, when `hive.stats.autogather` is
> true(default is true)
>
> {code:java}
> // Some comments here
> public String getFoo()
> if (oldPart == null) {
> newTPart.getTPartition().setParameters(new HashMap<String,String>());
> if (this.getConf().getBoolVar(HiveConf.ConfVars.HIVESTATSAUTOGATHER))
> {
>
> StatsSetupConst.setBasicStatsStateForCreateTable(newTPart.getParameters(),
> StatsSetupConst.TRUE);
> }
> public static void setBasicStatsStateForCreateTable(Map<String, String>
> params, String setting) {
> if (TRUE.equals(setting)) {
> for (String stat : StatsSetupConst.supportedStats) {
> params.put(stat, "0");
> }
> }
> setBasicStatsState(params, setting);
> }
> public static final String[] supportedStats =
> {NUM_FILES,ROW_COUNT,TOTAL_SIZE,RAW_DATA_SIZE};
> {code}
> Then it set default rowNum as 0, but since spark will update numFiles and
> rawSize, so rowNum remain 0.
> This impact other system like presto's CBO.
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