From: "D'Arcy" "J.M." Cain <darcy@druid.net>
To: mdz@phalanx.phalanx.net
Cc: pgsql-interfaces@postgreSQL.org
Subject: Re: [INTERFACES] A few more JDBC meta-data questions...
Date: Tue, 17 Aug 1999 07:19:00 -0400 (EDT)
Message-ID: <m11GhGe-0000dbC@druid.net> (raw)
In-Reply-To: <37B8A5B4.A85541A0@phalanx.net>
Thus spake Mark Dzmura
> 1. Is it possible to programatically enumerate or discover the databases in a running database??
>
> 2. Is it possible to programmaticaly enumerate or discover the tables in a database??
-- get list of databases
SELECT datname FROM pg_database;
-- get list of tables including views but not system tables
SELECT relname FROM pg_class
WHERE relkind = 'r' AND
relname !~ '^Inv' AND
relname !~ '^pg_';
And for completeness;
-- get list of attributes and types for a specific table
SELECT pg_attribute.attname, pg_type.typname
FROM pg_class, pg_attribute, pg_type
WHERE pg_class.relname = 'tablename' AND
pg_attribute.attnum > 0 AND
pg_attribute.attrelid = pg_class.oid AND
pg_attribute.atttypid = pg_type.oid;
-- get list of tables and primary keys (assumes no complex keys)
-- only includes tables with primary keys so no views
SELECT pg_class.relname, pg_attribute.attname
FROM pg_class, pg_attribute, pg_index
WHERE pg_class.oid = pg_attribute.attrelid AND
pg_class.oid = pg_index.indrelid AND
pg_index.indkey[0] = pg_attribute.attnum AND
pg_index.indisprimary = 't';
--
D'Arcy J.M. Cain <darcy@{druid|vex}.net> | Democracy is three wolves
http://www.druid.net/darcy/ | and a sheep voting on
+1 416 424 2871 (DoD#0082) (eNTP) | what's for dinner.
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To: pgsql-interfaces@postgresql.org
Cc: darcy@druid.net, mdz@phalanx.phalanx.net
Subject: Re: [INTERFACES] A few more JDBC meta-data questions...
In-Reply-To: <m11GhGe-0000dbC@druid.net>
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