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https://issues.apache.org/jira/browse/DERBY-4192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703386#action_12703386
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Dag H. Wanvik commented on DERBY-4192:
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Thanks for this improvement, Tiago. +1
This sentence could be misconstrued though;
-- It will fetch rows 11 through 20 (inclusive) from the table T, sorted by I
The sorting happen *before* the row count filtering, so I think it would be
better to say:
-- The statement will order T by I, and then fetch rows 11 through 20
(inclusive) of the sorted rows.
In general, just returning a subset of the rows *without* ordering is not
portable, unless the app
does not care which rows go into the subset.
> OFFSET and FETCH FIRST documentation improvement
> ------------------------------------------------
>
> Key: DERBY-4192
> URL: https://issues.apache.org/jira/browse/DERBY-4192
> Project: Derby
> Issue Type: Improvement
> Affects Versions: 10.5.1.1
> Reporter: Tiago R. Espinha
> Priority: Minor
>
> I have a suggestion regarding the documentation for the OFFSET and FETCH
> FIRST documentation. On these documents, we have three SQL examples on the
> usage of these clauses. I suggest that we add a brief description of what
> each clause does.
> This might help the users to have a better understanding at first of how the
> said clauses work.
> Here are the examples with a possible description:
> -- This query fetches the first row from T
> SELECT * FROM T FETCH FIRST ROW ONLY;
> -- This query skips the first 10 rows and fetches the following 10.
> -- It will fetch rows 11 through 20 (inclusive) from the table T, sorted by I
> SELECT * FROM T ORDER BY I OFFSET 10 ROWS FETCH NEXT 10 ROWS ONLY;
> -- This query skips the first 100 rows from T.
> -- If the table has less than 101 records, then an empty result set is
> returned.
> SELECT * FROM T OFFSET 100 ROWS;
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