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https://issues.apache.org/jira/browse/HIVE-26320?focusedWorklogId=813192&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-813192
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ASF GitHub Bot logged work on HIVE-26320:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Sep/22 04:49
Start Date: 29/Sep/22 04:49
Worklog Time Spent: 10m
Work Description: amansinha100 commented on code in PR #3628:
URL: https://github.com/apache/hive/pull/3628#discussion_r983060737
##########
ql/src/java/org/apache/hadoop/hive/ql/io/parquet/serde/ParquetHiveSerDe.java:
##########
@@ -91,11 +93,61 @@ public class ParquetHiveSerDe extends AbstractSerDe
implements SchemaInference {
private ObjectInspector objInspector;
private ParquetHiveRecord parquetRow;
+ private ObjectInspectorConverters.Converter converter;
public ParquetHiveSerDe() {
parquetRow = new ParquetHiveRecord();
}
+ // Recursively check if CHAR or VARCHAR types are used
+ private boolean needsConversion(TypeInfo type) {
Review Comment:
Thinking about the number of times needsConversion() and the subsequent
convert() would be called for a table scan that is reading say N parquet files
each with m row groups. Such operations on a per file or per row group would
be ok but if done on per row basis, it would be a perf hit.
Issue Time Tracking
-------------------
Worklog Id: (was: 813192)
Time Spent: 1h 50m (was: 1h 40m)
> Incorrect case evaluation for Parquet based table
> -------------------------------------------------
>
> Key: HIVE-26320
> URL: https://issues.apache.org/jira/browse/HIVE-26320
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2, Query Planning
> Affects Versions: 4.0.0-alpha-1
> Reporter: Chiran Ravani
> Assignee: John Sherman
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Query involving case statement with two or more conditions leads to incorrect
> result for tables with parquet format, The problem is not observed with ORC
> or TextFile.
> *Steps to reproduce*:
> {code:java}
> create external table case_test_parquet(kob varchar(2),enhanced_type_code
> int) stored as parquet;
> insert into case_test_parquet values('BB',18),('BC',18),('AB',18);
> select case when (
> (kob='BB' and enhanced_type_code='18')
> or (kob='BC' and enhanced_type_code='18')
> )
> then 1
> else 0
> end as logic_check
> from case_test_parquet;
> {code}
> Result:
> {code}
> 0
> 0
> 0
> {code}
> Expected result:
> {code}
> 1
> 1
> 0
> {code}
> The problem does not appear when setting hive.optimize.point.lookup=false.
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