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https://issues.apache.org/jira/browse/SPARK-29634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961828#comment-16961828
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Zhaoyang Qin edited comment on SPARK-29634 at 10/29/19 9:42 AM:
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About Char datatype,Hive Docs sees:
[https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Types#LanguageManualTypes-CharcharChar]
But spark-sql CLI read this table by
*select * from foo where bar = 'something'* ，
There will be no results.You must add Spaces like this:
*select * from foo where bar = 'something '.*
This causes normal SQL fail to execute correctly.
And many TPCDS statements get no results，eg: sql7,sql71,sql 72 etc.
was (Author: kelvin.fe):
About Char datatype,Hive Docs sees:
[https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Types#LanguageManualTypes-CharcharChar]
But spark-sql CLI read this table by *select * from foo where bar =
'something'* ，There will be no results.You must add Spaces like this:
*select * from foo where bar = 'something '.*
This causes normal SQL fail to execute correctly.
And many TPCDS statements to get no results.eg: sql7,sql71,sql 72 etc.
> spark-sql can't query hive table values with schema Char by equality.
> ---------------------------------------------------------------------
>
> Key: SPARK-29634
> URL: https://issues.apache.org/jira/browse/SPARK-29634
> Project: Spark
> Issue Type: Bug
> Components: Spark Shell, SQL
> Affects Versions: 2.2.1, 2.3.1
> Environment: Spark 2.3.1
> Hive 3.0.0
> TPCDS Data & Tables
> Reporter: Zhaoyang Qin
> Priority: Major
> Labels: spark-sql, spark-sql-perf
>
> spark-sql can't query hive table values that with schema Char by equality.
> When i use spark-sql CLI to execute a query with hive tables,The expected
> results can not be obtained. The query result is empty. Some equality
> conditions did not work as expected.I checked and found that the table fields
> had one thing in common: they were created as char，sometimes as varchar.Then
> I execute the following statement and return an empty result: select * from
> foo where bar = 'something'.In fact, the data does exist. Using hive sql
> returns the correct results.
> Simulation steps:（use spark-sql）
> {code:java}
> //spark-sql
> {code}
> ./spark-sql
> > create table test1 (name char(10), age int);
> > insert into test1 values('erya',15);
> > select * from test1 where name = 'erya'; // no results
> > select * from test1 where name = 'erya '; // add 6 spaces
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