Thread: [SQL] Get relation name form relids in postgresql
Hi all,
I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?
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Thanks,
Gourav Kumar
Gourav Kumar
Hi. Try pg_catalog.pg_stat_user_tables, there you have the relid (oid) identifier
2017-10-05 13:17 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:
Hi all,I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?--Thanks,
Gourav Kumar
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Hi,
Thanks for the reply.
I want to be able to do that from inside the postgres code, while I am in middle of executing a Query.
On 06-Oct-2017 7:12 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:
Hi. Try pg_catalog.pg_stat_user_tables, there you have the relid (oid) identifier 2017-10-05 13:17 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi all,I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?--Thanks,
Gourav Kumar
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Sure, you can cast the relid to regclass, or join the mentioned table.
2017-10-05 21:48 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:
Hi,
Thanks for the reply.
I want to be able to do that from inside the postgres code, while I am in middle of executing a Query.
On 06-Oct-2017 7:12 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Hi. Try pg_catalog.pg_stat_user_tables, there you have the relid (oid) identifier 2017-10-05 13:17 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi all,I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?--Thanks,
Gourav Kumar
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I did not get this part. Can you elaborate please.
On 06-Oct-2017 8:24 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:
Sure, you can cast the relid to regclass, or join the mentioned table.2017-10-05 21:48 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi,
Thanks for the reply.
I want to be able to do that from inside the postgres code, while I am in middle of executing a Query.
On 06-Oct-2017 7:12 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Hi. Try pg_catalog.pg_stat_user_tables, there you have the relid (oid) identifier 2017-10-05 13:17 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi all,I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?--Thanks,
Gourav Kumar
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Sure, if you cast a field that contains a relid to the reglass type, you get the name of the relation.
Example:
select relid, relid::regclass from pg_stat_user_tables where relname = 'theNameOfYourTable';
Example:
select relid, relid::regclass from pg_stat_user_tables where relname = 'theNameOfYourTable';
2017-10-05 21:55 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:
I did not get this part. Can you elaborate please.
On 06-Oct-2017 8:24 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Sure, you can cast the relid to regclass, or join the mentioned table.2017-10-05 21:48 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi,
Thanks for the reply.
I want to be able to do that from inside the postgres code, while I am in middle of executing a Query.
On 06-Oct-2017 7:12 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Hi. Try pg_catalog.pg_stat_user_tables, there you have the relid (oid) identifier 2017-10-05 13:17 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi all,I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?--Thanks,
Gourav Kumar
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But I can't fire a query when I am inside postgres code, while executing another query.
On 06-Oct-2017 8:31 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:
Sure, if you cast a field that contains a relid to the reglass type, you get the name of the relation.
Example:
select relid, relid::regclass from pg_stat_user_tables where relname = 'theNameOfYourTable';2017-10-05 21:55 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:I did not get this part. Can you elaborate please.
On 06-Oct-2017 8:24 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Sure, you can cast the relid to regclass, or join the mentioned table.2017-10-05 21:48 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi,
Thanks for the reply.
I want to be able to do that from inside the postgres code, while I am in middle of executing a Query.
On 06-Oct-2017 7:12 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Hi. Try pg_catalog.pg_stat_user_tables, there you have the relid (oid) identifier 2017-10-05 13:17 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi all,I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?--Thanks,
Gourav Kumar
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Mmm, what do you mean by postgres code ? Are we talking here about the postgres source code or SQL ? If it's the source code, that's beyond my knowledge, sorry. The pgsql-hackers list may be a better fit for what you're looking for, or perhaps pgsql-general
Best..
2017-10-05 22:04 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:
But I can't fire a query when I am inside postgres code, while executing another query.
On 06-Oct-2017 8:31 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Sure, if you cast a field that contains a relid to the reglass type, you get the name of the relation.
Example:
select relid, relid::regclass from pg_stat_user_tables where relname = 'theNameOfYourTable';2017-10-05 21:55 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:I did not get this part. Can you elaborate please.
On 06-Oct-2017 8:24 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Sure, you can cast the relid to regclass, or join the mentioned table.2017-10-05 21:48 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi,
Thanks for the reply.
I want to be able to do that from inside the postgres code, while I am in middle of executing a Query.
On 06-Oct-2017 7:12 AM, "Rene Romero Benavides" <rene.romero.b@gmail.com> wrote:Hi. Try pg_catalog.pg_stat_user_tables, there you have the relid (oid) identifier 2017-10-05 13:17 GMT-05:00 Gourav Kumar <gourav1905@gmail.com>:Hi all,I am looking for a way to get the relation name from the relid or RelOptInfo data structure. Can anyone help me with this ? How can I use these to get to relation name ?--Thanks,
Gourav Kumar
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