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From "Hank Fanchiu (Jira)" <j...@apache.org>
Subject [jira] [Work started] (HIVE-21614) Derby does not support CLOB comparisons
Date Fri, 16 Jul 2021 04:56:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-21614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HIVE-21614 started by Hank Fanchiu.
-------------------------------------------
> Derby does not support CLOB comparisons
> ---------------------------------------
>
>                 Key: HIVE-21614
>                 URL: https://issues.apache.org/jira/browse/HIVE-21614
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 2.3.4, 3.0.0
>            Reporter: Vlad Rozov
>            Assignee: Hank Fanchiu
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> HiveMetaStoreClient.listTableNamesByFilter() with non empty filter causes exception with
Derby DB:
> {noformat}
> Caused by: ERROR 42818: Comparisons between 'CLOB (UCS_BASIC)' and 'CLOB (UCS_BASIC)'
are not supported. Types must be comparable. String types must also have matching collation.
If collation does not match, a possible solution is to cast operands to force them to the
default collation (e.g. SELECT tablename FROM sys.systables WHERE CAST(tablename AS VARCHAR(128))
= 'T1')
> 	at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
> 	at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.BinaryComparisonOperatorNode.bindComparisonOperator(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.BinaryComparisonOperatorNode.bindExpression(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.BinaryOperatorNode.bindExpression(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.BinaryLogicalOperatorNode.bindExpression(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.AndNode.bindExpression(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.SelectNode.bindExpressions(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.DMLStatementNode.bindExpressions(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.DMLStatementNode.bind(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.CursorNode.bindStatement(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
> 	at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown
Source)
> 	... 42 more
> {noformat}



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