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https://issues.apache.org/jira/browse/HIVE-23031?focusedWorklogId=429104&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-429104
]
ASF GitHub Bot logged work on HIVE-23031:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Apr/20 15:48
Start Date: 30/Apr/20 15:48
Worklog Time Spent: 10m
Work Description: jcamachor commented on a change in pull request #988:
URL: https://github.com/apache/hive/pull/988#discussion_r418110338
##########
File path: common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
##########
@@ -2465,6 +2465,19 @@ private static void
populateLlapDaemonVarsSet(Set<String> llapDaemonVarsSetLocal
"If the number of references to a CTE clause exceeds this threshold,
Hive will materialize it\n" +
"before executing the main query block. -1 will disable this
feature."),
+ HIVE_OPTIMIZE_BI_ENABLED("hive.optimize.bi.enabled", false,
+ "Enables query rewrites based on approximate functions(sketches)."),
+
+
HIVE_OPTIMIZE_BI_REWRITE_COUNTDISTINCT_ENABLED("hive.optimize.bi.rewrite.countdistinct.enabled",
+ true,
+ "Enables to rewrite COUNT(DISTINCT(X)) queries to be rewritten to use
sketch functions."),
+
+ HIVE_OPTIMIZE_BI_REWRITE_COUNT_DISTINCT_SKETCH(
+ "hive.optimize.bi.rewrite.countdistinct.sketch", "hll",
+ new StringSet("hll", "cpc", "theta"),
Review comment:
You are right, failure can still happen when the sketch is stored and
the mode changes.
Thanks for making the changes in any case. Let's check in this patch and
give priority to the overlay issue, it should not be too difficult to address
and will fix all these issues.
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Issue Time Tracking
-------------------
Worklog Id: (was: 429104)
Time Spent: 3.5h (was: 3h 20m)
> Add option to enable transparent rewrite of count(distinct) into sketch
> functions
> ---------------------------------------------------------------------------------
>
> Key: HIVE-23031
> URL: https://issues.apache.org/jira/browse/HIVE-23031
> Project: Hive
> Issue Type: Sub-task
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-23031.01.patch, HIVE-23031.02.patch,
> HIVE-23031.03.patch, HIVE-23031.03.patch, HIVE-23031.03.patch,
> HIVE-23031.04.patch, HIVE-23031.04.patch
>
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
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