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https://issues.apache.org/jira/browse/DERBY-5130?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rick Hillegas updated DERBY-5130:
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Issue & fix info: [Workaround attached]
Labels: comparison derby_triage10_8 sql typesystem (was:
comparison sql typesystem)
> Allow for LONG VARCHAR to be compared to LONG VARCHAR
> -----------------------------------------------------
>
> Key: DERBY-5130
> URL: https://issues.apache.org/jira/browse/DERBY-5130
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.7.1.1
> Reporter: Lukas Eder
> Priority: Minor
> Labels: comparison, derby_triage10_8, sql, typesystem
>
> Interestingly, this is not possible:
> select 1 from SYSIBM.SYSDUMMY1 where cast('2' as long varchar) = cast('2'
> as long varchar)
> Whereas these statements are executable:
> select 1 from SYSIBM.SYSDUMMY1 where '2' = '2'
> select 1 from SYSIBM.SYSDUMMY1 where cast(cast('2' as long varchar) as
> varchar(1)) = cast(cast('2' as long varchar) as varchar(1))
> According to the documentation that is the correct behaviour:
> http://db.apache.org/derby/docs/10.7/ref/rrefsqlj58560.html
> Nevertheless, if casting is possible between LONG VARCHAR and VARCHAR, and
> assignment too, then I don't understand why LONG VARCHAR cannot even be
> compared to LONG VARCHAR
> Note: A similar issue has been open for a long time:
> https://issues.apache.org/jira/browse/DERBY-342
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