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postgresql/src/tools/findoidjoins
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Tom Lane 65c5fcd353 Restructure index access method API to hide most of it at the C level. 
This patch reduces pg_am to just two columns, a name and a handler
function.  All the data formerly obtained from pg_am is now provided
in a C struct returned by the handler function.  This is similar to
the designs we've adopted for FDWs and tablesample methods.  There
are multiple advantages.  For one, the index AM's support functions
are now simple C functions, making them faster to call and much less
error-prone, since the C compiler can now check function signatures.
For another, this will make it far more practical to define index access
methods in installable extensions.

A disadvantage is that SQL-level code can no longer see attributes
of index AMs; in particular, some of the crosschecks in the opr_sanity
regression test are no longer possible from SQL.  We've addressed that
by adding a facility for the index AM to perform such checks instead.
(Much more could be done in that line, but for now we're content if the
amvalidate functions more or less replace what opr_sanity used to do.)
We might also want to expose some sort of reporting functionality, but
this patch doesn't do that.

Alexander Korotkov, reviewed by Petr Jelínek, and rather heavily
editorialized on by me.
 		2016-01-17 19:36:59 -05:00
..
.gitignore Update oidjoins regression test for 9.4. 2014-04-16 14:28:59 -04:00
Makefile Update copyright for 2016 2016-01-02 13:33:40 -05:00
README Restructure index access method API to hide most of it at the C level. 2016-01-17 19:36:59 -05:00
findoidjoins.c Update copyright for 2016 2016-01-02 13:33:40 -05:00
make_oidjoins_check Improve findoidjoins to cover more cases. 2011-04-23 19:33:17 -04:00

README 

src/tools/findoidjoins/README

findoidjoins
============

This program scans a database and prints oid fields (also reg* fields)
and the tables they join to.  It is normally used to check the system
catalog join relationships (shown below for 9.6devel as of 2016-01-16).

Historically this has been run against an empty database such as template1,
but there's a problem with that approach: some of the catalogs are empty
and so their joining columns won't show up in the output.  Current practice
is to run it against the regression-test database, which populates the
catalogs in interesting ways.

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 9.6devel, the *only* fields that should join to more than one target
table are pg_description.objoid, pg_depend.objid, pg_depend.refobjid,
pg_shdescription.objoid, pg_shdepend.objid, and pg_shdepend.refobjid.
(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 REG* column that don't match any row in the expected table).
Note that fields joining to more than one table are NOT processed,
just reported as linking to more than one table.

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.
(Typically we update it at the end of each development cycle.)

NOTE: as of 9.6devel, make_oidjoins_check produces two bogus join checks:
Join pg_catalog.pg_class.relfilenode => pg_catalog.pg_class.oid
Join pg_catalog.pg_database.datlastsysoid => pg_catalog.pg_database.oid
These are artifacts and should not be added to the oidjoins regression test.
You might also get output for pg_shdepend.refobjid and pg_shdescription.objoid,
neither of which should be added to the regression test.

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

Join pg_catalog.pg_aggregate.aggfnoid => pg_catalog.pg_proc.oid
Join pg_catalog.pg_aggregate.aggtransfn => pg_catalog.pg_proc.oid
Join pg_catalog.pg_aggregate.aggfinalfn => pg_catalog.pg_proc.oid
Join pg_catalog.pg_aggregate.aggmtransfn => pg_catalog.pg_proc.oid
Join pg_catalog.pg_aggregate.aggminvtransfn => pg_catalog.pg_proc.oid
Join pg_catalog.pg_aggregate.aggmfinalfn => pg_catalog.pg_proc.oid
Join pg_catalog.pg_aggregate.aggsortop => pg_catalog.pg_operator.oid
Join pg_catalog.pg_aggregate.aggtranstype => pg_catalog.pg_type.oid
Join pg_catalog.pg_aggregate.aggmtranstype => pg_catalog.pg_type.oid
Join pg_catalog.pg_am.amhandler => pg_catalog.pg_proc.oid
Join pg_catalog.pg_amop.amopfamily => pg_catalog.pg_opfamily.oid
Join pg_catalog.pg_amop.amoplefttype => pg_catalog.pg_type.oid
Join pg_catalog.pg_amop.amoprighttype => pg_catalog.pg_type.oid
Join pg_catalog.pg_amop.amopopr => pg_catalog.pg_operator.oid
Join pg_catalog.pg_amop.amopmethod => pg_catalog.pg_am.oid
Join pg_catalog.pg_amop.amopsortfamily => pg_catalog.pg_opfamily.oid
Join pg_catalog.pg_amproc.amprocfamily => pg_catalog.pg_opfamily.oid
Join pg_catalog.pg_amproc.amproclefttype => pg_catalog.pg_type.oid
Join pg_catalog.pg_amproc.amprocrighttype => pg_catalog.pg_type.oid
Join pg_catalog.pg_amproc.amproc => pg_catalog.pg_proc.oid
Join pg_catalog.pg_attrdef.adrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_attribute.attrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_attribute.atttypid => pg_catalog.pg_type.oid
Join pg_catalog.pg_attribute.attcollation => pg_catalog.pg_collation.oid
Join pg_catalog.pg_cast.castsource => pg_catalog.pg_type.oid
Join pg_catalog.pg_cast.casttarget => pg_catalog.pg_type.oid
Join pg_catalog.pg_cast.castfunc => pg_catalog.pg_proc.oid
Join pg_catalog.pg_class.relnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_class.reltype => pg_catalog.pg_type.oid
Join pg_catalog.pg_class.reloftype => pg_catalog.pg_type.oid
Join pg_catalog.pg_class.relowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_class.relam => pg_catalog.pg_am.oid
Join pg_catalog.pg_class.reltablespace => pg_catalog.pg_tablespace.oid
Join pg_catalog.pg_class.reltoastrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_collation.collnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_collation.collowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_constraint.connamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_constraint.conrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_constraint.contypid => pg_catalog.pg_type.oid
Join pg_catalog.pg_constraint.conindid => pg_catalog.pg_class.oid
Join pg_catalog.pg_constraint.confrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_conversion.connamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_conversion.conowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_conversion.conproc => pg_catalog.pg_proc.oid
Join pg_catalog.pg_database.datdba => pg_catalog.pg_authid.oid
Join pg_catalog.pg_database.dattablespace => pg_catalog.pg_tablespace.oid
Join pg_catalog.pg_db_role_setting.setdatabase => pg_catalog.pg_database.oid
Join pg_catalog.pg_depend.classid => pg_catalog.pg_class.oid
Join pg_catalog.pg_depend.refclassid => pg_catalog.pg_class.oid
Join pg_catalog.pg_description.classoid => pg_catalog.pg_class.oid
Join pg_catalog.pg_enum.enumtypid => pg_catalog.pg_type.oid
Join pg_catalog.pg_extension.extowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_extension.extnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_foreign_data_wrapper.fdwowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_foreign_server.srvowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_foreign_server.srvfdw => pg_catalog.pg_foreign_data_wrapper.oid
Join pg_catalog.pg_index.indexrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_index.indrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_inherits.inhrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_inherits.inhparent => pg_catalog.pg_class.oid
Join pg_catalog.pg_language.lanowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_language.lanplcallfoid => pg_catalog.pg_proc.oid
Join pg_catalog.pg_language.laninline => pg_catalog.pg_proc.oid
Join pg_catalog.pg_language.lanvalidator => pg_catalog.pg_proc.oid
Join pg_catalog.pg_largeobject.loid => pg_catalog.pg_largeobject_metadata.oid
Join pg_catalog.pg_largeobject_metadata.lomowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_namespace.nspowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_opclass.opcmethod => pg_catalog.pg_am.oid
Join pg_catalog.pg_opclass.opcnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_opclass.opcowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_opclass.opcfamily => pg_catalog.pg_opfamily.oid
Join pg_catalog.pg_opclass.opcintype => pg_catalog.pg_type.oid
Join pg_catalog.pg_opclass.opckeytype => pg_catalog.pg_type.oid
Join pg_catalog.pg_operator.oprnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_operator.oprowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_operator.oprleft => pg_catalog.pg_type.oid
Join pg_catalog.pg_operator.oprright => pg_catalog.pg_type.oid
Join pg_catalog.pg_operator.oprresult => pg_catalog.pg_type.oid
Join pg_catalog.pg_operator.oprcom => pg_catalog.pg_operator.oid
Join pg_catalog.pg_operator.oprnegate => pg_catalog.pg_operator.oid
Join pg_catalog.pg_operator.oprcode => pg_catalog.pg_proc.oid
Join pg_catalog.pg_operator.oprrest => pg_catalog.pg_proc.oid
Join pg_catalog.pg_operator.oprjoin => pg_catalog.pg_proc.oid
Join pg_catalog.pg_opfamily.opfmethod => pg_catalog.pg_am.oid
Join pg_catalog.pg_opfamily.opfnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_opfamily.opfowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_policy.polrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_proc.pronamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_proc.proowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_proc.prolang => pg_catalog.pg_language.oid
Join pg_catalog.pg_proc.provariadic => pg_catalog.pg_type.oid
Join pg_catalog.pg_proc.protransform => pg_catalog.pg_proc.oid
Join pg_catalog.pg_proc.prorettype => pg_catalog.pg_type.oid
Join pg_catalog.pg_range.rngtypid => pg_catalog.pg_type.oid
Join pg_catalog.pg_range.rngsubtype => pg_catalog.pg_type.oid
Join pg_catalog.pg_range.rngcollation => pg_catalog.pg_collation.oid
Join pg_catalog.pg_range.rngsubopc => pg_catalog.pg_opclass.oid
Join pg_catalog.pg_range.rngcanonical => pg_catalog.pg_proc.oid
Join pg_catalog.pg_range.rngsubdiff => pg_catalog.pg_proc.oid
Join pg_catalog.pg_rewrite.ev_class => pg_catalog.pg_class.oid
Join pg_catalog.pg_shdepend.refclassid => pg_catalog.pg_class.oid
Join pg_catalog.pg_shdescription.classoid => pg_catalog.pg_class.oid
Join pg_catalog.pg_statistic.starelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_statistic.staop1 => pg_catalog.pg_operator.oid
Join pg_catalog.pg_statistic.staop2 => pg_catalog.pg_operator.oid
Join pg_catalog.pg_statistic.staop3 => pg_catalog.pg_operator.oid
Join pg_catalog.pg_statistic.staop4 => pg_catalog.pg_operator.oid
Join pg_catalog.pg_statistic.staop5 => pg_catalog.pg_operator.oid
Join pg_catalog.pg_tablespace.spcowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_transform.trftype => pg_catalog.pg_type.oid
Join pg_catalog.pg_transform.trflang => pg_catalog.pg_language.oid
Join pg_catalog.pg_transform.trffromsql => pg_catalog.pg_proc.oid
Join pg_catalog.pg_transform.trftosql => pg_catalog.pg_proc.oid
Join pg_catalog.pg_trigger.tgrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_trigger.tgfoid => pg_catalog.pg_proc.oid
Join pg_catalog.pg_trigger.tgconstrrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_trigger.tgconstrindid => pg_catalog.pg_class.oid
Join pg_catalog.pg_trigger.tgconstraint => pg_catalog.pg_constraint.oid
Join pg_catalog.pg_ts_config.cfgnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_ts_config.cfgowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_ts_config.cfgparser => pg_catalog.pg_ts_parser.oid
Join pg_catalog.pg_ts_config_map.mapcfg => pg_catalog.pg_ts_config.oid
Join pg_catalog.pg_ts_config_map.mapdict => pg_catalog.pg_ts_dict.oid
Join pg_catalog.pg_ts_dict.dictnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_ts_dict.dictowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_ts_dict.dicttemplate => pg_catalog.pg_ts_template.oid
Join pg_catalog.pg_ts_parser.prsnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_ts_parser.prsstart => pg_catalog.pg_proc.oid
Join pg_catalog.pg_ts_parser.prstoken => pg_catalog.pg_proc.oid
Join pg_catalog.pg_ts_parser.prsend => pg_catalog.pg_proc.oid
Join pg_catalog.pg_ts_parser.prsheadline => pg_catalog.pg_proc.oid
Join pg_catalog.pg_ts_parser.prslextype => pg_catalog.pg_proc.oid
Join pg_catalog.pg_ts_template.tmplnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_ts_template.tmplinit => pg_catalog.pg_proc.oid
Join pg_catalog.pg_ts_template.tmpllexize => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typnamespace => pg_catalog.pg_namespace.oid
Join pg_catalog.pg_type.typowner => pg_catalog.pg_authid.oid
Join pg_catalog.pg_type.typrelid => pg_catalog.pg_class.oid
Join pg_catalog.pg_type.typelem => pg_catalog.pg_type.oid
Join pg_catalog.pg_type.typarray => pg_catalog.pg_type.oid
Join pg_catalog.pg_type.typinput => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typoutput => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typreceive => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typsend => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typmodin => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typmodout => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typanalyze => pg_catalog.pg_proc.oid
Join pg_catalog.pg_type.typbasetype => pg_catalog.pg_type.oid
Join pg_catalog.pg_type.typcollation => pg_catalog.pg_collation.oid
Join pg_catalog.pg_constraint.conpfeqop []=> pg_catalog.pg_operator.oid
Join pg_catalog.pg_constraint.conppeqop []=> pg_catalog.pg_operator.oid
Join pg_catalog.pg_constraint.conffeqop []=> pg_catalog.pg_operator.oid
Join pg_catalog.pg_constraint.conexclop []=> pg_catalog.pg_operator.oid
Join pg_catalog.pg_proc.proallargtypes []=> pg_catalog.pg_type.oid

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

Bruce Momjian (bruce@momjian.us)
Updated for 7.3 by Joe Conway (mail@joeconway.com)