Re: [PATCHES] DatabaseMetaData.getIndexInfo() added

Here is my version of your patch. I have gotten the hash test to work.
Can someone test this? It compiles OK, but I am unsure how to test this
feature.

I read about Cardinality in the comments and I think you got it fine.

> Hi all!
>
> Attached is a patch that implements DatabaseMetaData.getIndexInfo()
> for the JDBC2 driver. It also fixes a compile error under jikes by
> casting characters in case statements of a byte-compared switch to
> bytes.
>
> A few notes on getIndexInfo():
>
> 1.) getArray() is not implemented for the postgresql JDBC driver yet,
> so getIndexInfo() parses the pg_index.indkey field into separate
> integers by hand.
>
> 2.) I have guessed that if pg_index.indisclustered is "false", then
> the index is "hashed"; if not, line 2561 of the resultant class
> should have "tableIndexOther" rather than "tableIndexHashed".
>
> 3.) I didn't know what sort sequence (if any) was used in indexes, so
> I have set it to "null" (unknown) on line 2566.
>
> 4.) For "CARDINALITY" (number of unique index items, the 11th field of
> the ResultSet returned by getIndexInfo()) I have used
> pg_classes.reltuples.
>
> I have tested this method, but hardly extensively. Is there a proper
> regression test suite for the JDBC driver that tests can be added to?
>
> William
> --
> William Webber william(at)peopleweb(dot)net(dot)au
> Senior Programmer
> PeopleWeb Australia http://www.peopleweb.com

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