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https://issues.apache.org/jira/browse/DERBY-4507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12838402#action_12838402
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Rick Hillegas commented on DERBY-4507:
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Thanks for this documentation, Kim. I have a couple comments:
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cdevspecialtfbasic.html:
I would reword the changes slightly so that they apply to general table
functions and not just to table functions which select from a table in a
foreign database:
"With a normal table function, you must select its entire contents. You can,
however, write a restricted table function that lets you limit the rows and
columns you select. A restricted table function can improve performance
greatly."
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cdevspecialtfrestr.html:
I would reword the following sentence so that it doesn't refer to the newness
of this feature. I don't think we'll remember to update this manual when the
feature no longer seems new:
"You must write a class which implements both java.sql.ResultSet and the
Derby-specific interface org.apache.derby.vti.RestrictedVTI."
Also, the signature of the ColumnQualifier constructor changed. I apologize for
not updating the functional spec. The example should be changed to:
new Restriction.ColumnQualifier(
"LASTNAME", ORDER_OP_EQUALS, "Stone" ) )
--------------
cdevspecialtfgetxxx.html:
This page looks ok. Just a heads-up that we need to update this table as part
of the UDT documentation because UDTs are now allowed as the types of columns
returned by table functions.
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cdevspecialtfopttune.html:
This pages looks ok, too. However, it made me realize that it would be useful
to have a brief section in the Tuning Guide on how to optimize the performance
of table functions by implementing the interface for restricted table
functions. This section could just point to the extensive write-up in the
Developer Guide.
> Write user documentation for restricted table functions.
> --------------------------------------------------------
>
> Key: DERBY-4507
> URL: https://issues.apache.org/jira/browse/DERBY-4507
> Project: Derby
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 10.6.0.0
> Reporter: Rick Hillegas
> Assignee: Kim Haase
> Attachments: DERBY-4507.diff, DERBY-4507.stat, DERBY-4507.zip
>
>
> We need to document this 10.6 feature: DERBY-4357.
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