Re: ResultSetMetaData.getTableName() == null

Hi Markus,

I'am surprised that PostgreSQL doesn't pass the table informatie to the
client. Susprised, since for example the library PHP (pg_field_table) is
using, does pass on this information. I'am quite sure that this library
function is based on the same API as the JDBC implementation is.

I agree with you that PostgreSQL server should supply this information
and implementing a full-flegded SQL parser is no option. Specially,
because PostgreSQL already parses the statement and therefore knows the
tables and columns that are involved in the query.

It is a pitty that this (for me) vital information is not made
available.

Best regards,

Alex.

-----Original Message-----
From: pgsql-jdbc-owner@postgresql.org
[mailto:pgsql-jdbc-owner@postgresql.org] On Behalf Of Markus Schaber
Sent: vrijdag 22 september 2006 15:24
To: pgsql-jdbc@postgresql.org
Subject: Re: [JDBC] ResultSetMetaData.getTableName() == null


Hi, Alex,

Alex Stienstra wrote:
> MySQL returns the tablename if possible otherwise the alias. I find
> this an acceptable solution. Having at least a name one could query
> the meta system in other to determine whether it is a table name or
> not.

The problem is that PostgreSQL does not pass any information about
aliases down to the client.

So we have two possibilities to implement this feature: Hack up the
server to provide that additional info, or implement a fully-fledged SQL
parser in the client and get the alias names ourselves.

Both seems not worth it currently.

HTH,
Markus
--
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf.     | Software Development GIS

Fight against software patents in Europe! www.ffii.org
www.nosoftwarepatents.org

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