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https://issues.apache.org/jira/browse/HIVE-23951?focusedWorklogId=465952&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-465952
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ASF GitHub Bot logged work on HIVE-23951:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 03/Aug/20 23:30
Start Date: 03/Aug/20 23:30
Worklog Time Spent: 10m
Work Description: vineetgarg02 commented on a change in pull request
#1315:
URL: https://github.com/apache/hive/pull/1315#discussion_r464714632
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/stats/StatsUtils.java
##########
@@ -1619,6 +1620,9 @@ public static ColStatistics
getColStatisticsFromExpression(HiveConf conf, Statis
colName = enfd.getFieldName();
colType = enfd.getTypeString();
countDistincts = numRows;
+ } else if (end instanceof ExprDynamicParamDesc) {
+ //skip colecting stats for parameters
Review comment:
This method tries to figure out column statistics involved in the given
expression. I guess the stats are used by parent callers to do various
estimation like map join, aggregate min/max. For dynamic expression stats are
returned as null. I think it makes more sense to do what
`buildColStatForConstant` is doing and return an estimation instead of null. I
will update the code.
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Issue Time Tracking
-------------------
Worklog Id: (was: 465952)
Time Spent: 1h 50m (was: 1h 40m)
> Support parameterized queries in WHERE/HAVING clause
> ----------------------------------------------------
>
> Key: HIVE-23951
> URL: https://issues.apache.org/jira/browse/HIVE-23951
> Project: Hive
> Issue Type: Sub-task
> Components: Query Planning
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
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