
   			      findoidjoins

This program scans a database, and prints oid fields (also regproc fields)
and the tables they join to.  CAUTION: it is ver-r-r-y slow on a large
database, or even a not-so-large one.  We don't really recommend running
it on anything but an empty database, such as template1.

Uses pgeasy library.

Run on an empty database, it returns the system join relationships (shown
below for 7.1).  Note that unexpected matches may indicate bogus entries
in system tables --- don't accept a peculiar match without question.
In particular, a field shown as joining to more than one target table is
probably messed up.  In 7.1, the *only* field that should join to more
than one target is pg_description.objoid.  (Running make_oidjoins_check
is an easy way to spot fields joining to more than one table, BTW.)

The shell script make_oidjoins_check converts findoidjoins' output
into an SQL script that checks for dangling links (entries in an
OID or REGPROC column that don't match any row in the expected table).
Note that fields joining to more than one table are NOT processed.

The result of make_oidjoins_check should be installed as the "oidjoins"
regression test.  The oidjoins test should be updated after any
revision in the patterns of cross-links between system tables.
(Ideally we'd just regenerate the script as part of the regression
tests themselves, but that seems too slow...)

NOTE: in 7.1, make_oidjoins_check produces two bogus join checks, one for
pg_database.datlastsysoid => pg_description.oid and one for
pg_class.relfilenode => pg_class.oid.  These are artifacts and should not
be added to the oidjoins regress test.

---------------------------------------------------------------------------

Join pg_aggregate.aggtransfn => pg_proc.oid
Join pg_aggregate.aggfinalfn => pg_proc.oid
Join pg_aggregate.aggbasetype => pg_type.oid
Join pg_aggregate.aggtranstype => pg_type.oid
Join pg_aggregate.aggfinaltype => pg_type.oid
Join pg_am.amgettuple => pg_proc.oid
Join pg_am.aminsert => pg_proc.oid
Join pg_am.amdelete => pg_proc.oid
Join pg_am.ambeginscan => pg_proc.oid
Join pg_am.amrescan => pg_proc.oid
Join pg_am.amendscan => pg_proc.oid
Join pg_am.ammarkpos => pg_proc.oid
Join pg_am.amrestrpos => pg_proc.oid
Join pg_am.ambuild => pg_proc.oid
Join pg_am.amcostestimate => pg_proc.oid
Join pg_amop.amopid => pg_am.oid
Join pg_amop.amopclaid => pg_opclass.oid
Join pg_amop.amopopr => pg_operator.oid
Join pg_amproc.amid => pg_am.oid
Join pg_amproc.amopclaid => pg_opclass.oid
Join pg_amproc.amproc => pg_proc.oid
Join pg_attribute.attrelid => pg_class.oid
Join pg_attribute.atttypid => pg_type.oid
Join pg_class.reltype => pg_type.oid
Join pg_class.relam => pg_am.oid
Join pg_class.reltoastrelid => pg_class.oid
Join pg_class.reltoastidxid => pg_class.oid
Join pg_index.indexrelid => pg_class.oid
Join pg_index.indrelid => pg_class.oid
Join pg_opclass.opcdeftype => pg_type.oid
Join pg_operator.oprleft => pg_type.oid
Join pg_operator.oprright => pg_type.oid
Join pg_operator.oprresult => pg_type.oid
Join pg_operator.oprcom => pg_operator.oid
Join pg_operator.oprnegate => pg_operator.oid
Join pg_operator.oprlsortop => pg_operator.oid
Join pg_operator.oprrsortop => pg_operator.oid
Join pg_operator.oprcode => pg_proc.oid
Join pg_operator.oprrest => pg_proc.oid
Join pg_operator.oprjoin => pg_proc.oid
Join pg_proc.prolang => pg_language.oid
Join pg_proc.prorettype => pg_type.oid
Join pg_rewrite.ev_class => pg_class.oid
Join pg_statistic.starelid => pg_class.oid
Join pg_statistic.staop => pg_operator.oid
Join pg_trigger.tgrelid => pg_class.oid
Join pg_trigger.tgfoid => pg_proc.oid
Join pg_type.typrelid => pg_class.oid
Join pg_type.typelem => pg_type.oid
Join pg_type.typinput => pg_proc.oid
Join pg_type.typoutput => pg_proc.oid
Join pg_type.typreceive => pg_proc.oid
Join pg_type.typsend => pg_proc.oid

---------------------------------------------------------------------------

Bruce Momjian (root@candle.pha.pa.us)
