The attached patch integrates dbsize functions into the backend, as per discussion on -hackers. The following functions are included:
pg_relation_size(text) - Get relation size by name/schema.name pg_relation_size(oid) - Get relation size by OID pg_tablespace_size(name) - Get tablespace size by name pg_tablespace_size(oid) - Get tablespace size by OID pg_database_size(name) - Get database size by name pg_database_size(oid) - Get database size by OID pg_table_size(text) - Get table size (including all indexes and toast tables) by name/schema.name pg_table_size(oid) - Get table size (including all indexes and toast tables) by OID pg_size_pretty(int8) - Pretty print (and round) the byte size specified (eg, 123456 = 121KB) This is based on the dbsize contrib module, and previous patches from Andreas Pflug and Ed L. The dbsize module should be removed once this is applied, and the catalog version incremented as I haven't included that in the patch. Regards, Dave.
dbsize.c
Description: dbsize.c
dbsize.patch
Description: dbsize.patch
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
