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.
