syscat.source
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上传日期:2007-01-07
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- ---------------------------------------------------------------------------
- --
- -- syscat.sql-
- -- sample queries to the system catalogs
- --
- --
- -- Copyright (c) 1994, Regents of the University of California
- --
- -- $Id: syscat.source,v 1.3 1998/03/20 04:12:25 momjian Exp $
- --
- ---------------------------------------------------------------------------
- --
- -- lists the name of all database adminstrators and the name of their
- -- database(s)
- --
- SELECT usename, datname
- FROM pg_user, pg_database
- WHERE usesysid = int2in(int4out(datdba))
- ORDER BY usename, datname;
- --
- -- lists all user-defined classes
- --
- SELECT relname
- FROM pg_class
- WHERE relkind = 'r' -- not indices
- and relname !~ '^pg_' -- not catalogs
- and relname !~ '^Inv' -- not large objects
- ORDER BY relname;
- --
- -- lists all simple indicies (ie. those that are not defined over a function
- -- of several attributes)
- --
- SELECT bc.relname AS class_name,
- ic.relname AS index_name,
- a.attname
- FROM pg_class bc, -- base class
- pg_class ic, -- index class
- pg_index i,
- pg_attribute a -- att in base
- WHERE i.indrelid = bc.oid
- and i.indexrelid = ic.oid
- and i.indkey[0] = a.attnum
- and a.attrelid = bc.oid
- and i.indproc = '0'::oid -- no functional indices
- ORDER BY class_name, index_name, attname;
- --
- -- lists the user-defined attributes and their types for all user-defined
- -- classes
- --
- SELECT c.relname, a.attname, t.typname
- FROM pg_class c, pg_attribute a, pg_type t
- WHERE c.relkind = 'r' -- no indices
- and c.relname !~ '^pg_' -- no catalogs
- and c.relname !~ '^Inv' -- no large objects
- and a.attnum > 0 -- no system att's
- and a.attrelid = c.oid
- and a.atttypid = t.oid
- ORDER BY relname, attname;
- --
- -- lists all user-defined base types (not including array types)
- --
- SELECT u.usename, t.typname
- FROM pg_type t, pg_user u
- WHERE u.usesysid = int2in(int4out(t.typowner))
- and t.typrelid = '0'::oid -- no complex types
- and t.typelem = '0'::oid -- no arrays
- and u.usename <> 'postgres'
- ORDER BY usename, typname;
- --
- -- lists all left unary operators
- --
- SELECT o.oprname AS left_unary,
- right_type.typname AS operand,
- result.typname AS return_type
- FROM pg_operator o, pg_type right_type, pg_type result
- WHERE o.oprkind = 'l' -- left unary
- and o.oprright = right_type.oid
- and o.oprresult = result.oid
- ORDER BY operand;
- --
- -- lists all right unary operators
- --
- SELECT o.oprname AS right_unary,
- left_type.typname AS operand,
- result.typname AS return_type
- FROM pg_operator o, pg_type left_type, pg_type result
- WHERE o.oprkind = 'r' -- right unary
- and o.oprleft = left_type.oid
- and o.oprresult = result.oid
- ORDER BY operand;
- --
- -- lists all binary operators
- --
- SELECT o.oprname AS binary_op,
- left_type.typname AS left_opr,
- right_type.typname AS right_opr,
- result.typname AS return_type
- FROM pg_operator o, pg_type left_type, pg_type right_type, pg_type result
- WHERE o.oprkind = 'b' -- binary
- and o.oprleft = left_type.oid
- and o.oprright = right_type.oid
- and o.oprresult = result.oid
- ORDER BY left_opr, right_opr;
- --
- -- lists the name, number of arguments and the return type of all user-defined
- -- C functions
- --
- SELECT p.proname, p.pronargs, t.typname
- FROM pg_proc p, pg_language l, pg_type t
- WHERE p.prolang = l.oid
- and p.prorettype = t.oid
- and l.lanname = 'c'
- ORDER BY proname;
- --
- -- lists all aggregate functions and the types to which they can be applied
- --
- SELECT a.aggname, t.typname
- FROM pg_aggregate a, pg_type t
- WHERE a.aggbasetype = t.oid
- ORDER BY aggname, typname;
- --
- -- lists all the operator classes that can be used with each access method
- -- as well as the operators that cn be used with the respective operator
- -- classes
- --
- SELECT am.amname, opc.opcname, opr.oprname
- FROM pg_am am, pg_amop amop, pg_opclass opc, pg_operator opr
- WHERE amop.amopid = am.oid
- and amop.amopclaid = opc.oid
- and amop.amopopr = opr.oid
- ORDER BY amname, opcname, oprname;