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https://issues.apache.org/jira/browse/DERBY-2731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Matrigali updated DERBY-2731:
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I believe that character string literals should take the collation of the
current compile schema, that seems to follow the spec closer and be consistent
with other settings. So I think current implmentation is ok and wiki spec
should be updated to reflect this behavior. And doc will need to change if
this has been incorporated anywhere into Derby docs already.
> String literal constants currently take the collation of the compilation
> schema but the wiki page
> http://wiki.apache.org/db-derby/BuiltInLanguageBasedOrderingDERBY-1478
> expects USER schema collation.
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-2731
> URL: https://issues.apache.org/jira/browse/DERBY-2731
> Project: Derby
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 10.3.0.0
> Reporter: Mamta A. Satoor
> Assignee: Mamta A. Satoor
>
> I checked in code some time back which sets the collation type of string
> literal to be same as the compilation schema. The advantage of this is that
> metadata queries will work without changes since those queries do character
> string literal comparisons.
> But the wiki page at
> http://wiki.apache.org/db-derby/BuiltInLanguageBasedOrderingDERBY-1478 in
> Section Collation Determination, Rule 1) says that character string literal
> should always take the collation of user schema. This decision was based on
> the discussion in the Collation feature discussion thread at
> http://www.nabble.com/Collation-feature-discussion-tf3418026.html#a9675967.
> SQL spec defines the behavior here to be implementation defined (it says that
> in a convoluted way which can be found in the Collation feature discussion).
> But considering the impact it will have on the metadata queries (they will
> have to be changed so that we CAST character string literals so that they
> will take the collation of system schema and hence the comparison will not
> fail), should we reconsider our decision made on the wiki page.
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