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https://issues.apache.org/jira/browse/DERBY-2646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497486
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Kristian Waagan commented on DERBY-2646:
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I'm planning to do a review and cleanup of the underlying structures of Clob in
the embedded driver. I foresee that ClobStreamControl and maybe EmbedClob will
be affected by this, but some other classes might have to be changed as well.
My current plans:
1) Write a new test for Clob.
Only methods defined by JDBC 3 or earlier will be tested. Currently these
tests reside in jdbcapi/ClobTest.java (in my sandbox), but there is already a
ClobTest in the jdbc4 package. I would prefer to rename the jdbc4 one to
something else. Any opinions on this?
2) Review and rewrite ClobStreamControl as appropriate.
I will focus especially on getting the byte and clob positions right, as it
has been suggested these have been mixed up on occasions. Changes might
propagate to EmbedClob, but I hope the changes there will be minimal.
Preliminary findings:
When executing the new tests, I quickly got tangled up in the current
difference of behavior between the embedded and the client driver for setBytes
etc. I do not plan to work on these, as I understand other work going on at the
moment will fix these issues when the switch to locators is made effective.
I also see differences in handling of the "ASCII" encoding, probably related to
the client using US-ASCII and embedded ISO-8859-1. I believe the latter is the
correct one, and that enabling locators might resolve the issues.
Last, I see an UTFDataFormat exception when inserting some Norwegian characters
with setAsciiStream.
If people have comments, questions or additions to my little plan, please let
me know.
I do plan to get this issue done for 10.3.
> Cleanup of Clob control/support structures
> ------------------------------------------
>
> Key: DERBY-2646
> URL: https://issues.apache.org/jira/browse/DERBY-2646
> Project: Derby
> Issue Type: Sub-task
> Components: JDBC
> Affects Versions: 10.3.0.0
> Reporter: Kristian Waagan
> Assigned To: Kristian Waagan
> Attachments: derby-2646-01a_trailing_space.diff,
> derby-2646-01a_trailing_space.stat
>
>
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