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https://issues.apache.org/jira/browse/DERBY-2247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12480521
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Suresh Thalamati commented on DERBY-2247:
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While doing some testing I ran into the LOBStreamControl.java in
the stack. Couple of minor questions.
1) LOBStreamControl.java : isValidPostion()
if (pos > tmpFile.length())
throw Util.generateCsSQLException(
SQLState.BLOB_POSITION_TOO_LARGE, new Long(pos + 1));
isValidPosition() is called on most of the read/write. I think calling
a file length call can be expensive for each read/write call.
2) Are blobs written to temp files for some special cases ?
I was just using BaseJdbcTestCase.java: assertEquals(Blob b1, Blob b2)
method in my test. It was triggering the writes to temp
file through LOBStreamControl.java , is this expected ?
> provide set methods for blob in embeded driver
> ----------------------------------------------
>
> Key: DERBY-2247
> URL: https://issues.apache.org/jira/browse/DERBY-2247
> Project: Derby
> Issue Type: Sub-task
> Components: JDBC
> Environment: all
> Reporter: Anurag Shekhar
> Assigned To: Anurag Shekhar
> Priority: Minor
> Attachments: derby-2247-followup.diff,
> derby-2247-v3-usingStoreFactory.diff, derby-2247-v4-usingStoreFactory.diff,
> derby-2247.diff, derby-2247v2-using_StoreFactory.diff
>
>
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