findoidjoins
-This program scans a database, and prints oid fields (also regproc, regclass
-and regtype 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.
+This program scans a database and prints oid fields (also reg* fields)
+and the tables they join to. We don't really recommend running it on
+anything but an empty database, such as template1; else it's likely to
+be very slow.
Run on an empty database, it returns the system join relationships (shown
-below for 7.2). Note that unexpected matches may indicate bogus entries
+below for 7.3). 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 7.2, 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.)
+probably messed up. In 7.3, the *only* fields that should join to more
+than one target are pg_description.objoid, pg_depend.objid, and
+pg_depend.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 REGPROC column that don't match any row in the expected table).
+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.
The result of make_oidjoins_check should be installed as the "oidjoins"
(Ideally we'd just regenerate the script as part of the regression
tests themselves, but that seems too slow...)
-NOTE: in 7.2, make_oidjoins_check produces one bogus join check, for
-pg_class.relfilenode => pg_class.oid. This is an artifact and should not
-be added to the oidjoins regress test.
+NOTE: in 7.3, 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_conversion.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.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.ambulkdelete => pg_proc.oid
-Join pg_am.amcostestimate => pg_proc.oid
-Join pg_amop.amopclaid => pg_opclass.oid
-Join pg_amop.amopopr => pg_operator.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_description.classoid => pg_class.oid
-Join pg_index.indexrelid => pg_class.oid
-Join pg_index.indrelid => pg_class.oid
-Join pg_opclass.opcamid => pg_am.oid
-Join pg_opclass.opcintype => 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.staop1 => pg_operator.oid
-Join pg_statistic.staop2 => pg_operator.oid
-Join pg_statistic.staop3 => 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
+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.aggtranstype => pg_catalog.pg_type.oid
+Join pg_catalog.pg_am.amgettuple => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.aminsert => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.ambeginscan => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.amrescan => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.amendscan => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.ammarkpos => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.amrestrpos => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.ambuild => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.ambulkdelete => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_am.amcostestimate => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_amop.amopclaid => pg_catalog.pg_opclass.oid
+Join pg_catalog.pg_amop.amopopr => pg_catalog.pg_operator.oid
+Join pg_catalog.pg_amproc.amopclaid => pg_catalog.pg_opclass.oid
+Join pg_catalog.pg_amproc.amproc => pg_catalog.pg_proc.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_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.relam => pg_catalog.pg_am.oid
+Join pg_catalog.pg_class.reltoastrelid => pg_catalog.pg_class.oid
+Join pg_catalog.pg_class.reltoastidxid => pg_catalog.pg_class.oid
+Join pg_catalog.pg_conversion.connamespace => pg_catalog.pg_namespace.oid
+Join pg_catalog.pg_conversion.conproc => pg_catalog.pg_proc.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_index.indexrelid => pg_catalog.pg_class.oid
+Join pg_catalog.pg_index.indrelid => pg_catalog.pg_class.oid
+Join pg_catalog.pg_language.lanvalidator => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_opclass.opcamid => pg_catalog.pg_am.oid
+Join pg_catalog.pg_opclass.opcnamespace => pg_catalog.pg_namespace.oid
+Join pg_catalog.pg_opclass.opcintype => pg_catalog.pg_type.oid
+Join pg_catalog.pg_operator.oprnamespace => pg_catalog.pg_namespace.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.oprlsortop => pg_catalog.pg_operator.oid
+Join pg_catalog.pg_operator.oprrsortop => pg_catalog.pg_operator.oid
+Join pg_catalog.pg_operator.oprltcmpop => pg_catalog.pg_operator.oid
+Join pg_catalog.pg_operator.oprgtcmpop => 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_proc.pronamespace => pg_catalog.pg_namespace.oid
+Join pg_catalog.pg_proc.prolang => pg_catalog.pg_language.oid
+Join pg_catalog.pg_proc.prorettype => pg_catalog.pg_type.oid
+Join pg_catalog.pg_rewrite.ev_class => 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_trigger.tgrelid => pg_catalog.pg_class.oid
+Join pg_catalog.pg_trigger.tgfoid => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_type.typnamespace => pg_catalog.pg_namespace.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.typinput => pg_catalog.pg_proc.oid
+Join pg_catalog.pg_type.typoutput => pg_catalog.pg_proc.oid
---------------------------------------------------------------------------
Bruce Momjian (root@candle.pha.pa.us)
+Updated for 7.3 by Joe Conway (mail@joeconway.com)
/*
- * findoidjoins.c, requires src/interfaces/libpgeasy
+ * findoidjoins.c
*
+ * Copyright 2002 by PostgreSQL Global Development Group
+ *
+ * $Header: /cvsroot/pgsql/contrib/findoidjoins/Attic/findoidjoins.c,v 1.18 2002/09/05 19:57:32 tgl Exp $
*/
#include "postgres_fe.h"
#include "libpq-fe.h"
-#include "halt.h"
-#include "libpgeasy.h"
+#include "pqexpbuffer.h"
-PGresult *attres,
- *relres;
int
main(int argc, char **argv)
{
- char query[4000];
- char relname[256];
- char relname2[256];
- char attname[256];
- char typname[256];
- int count;
- char optstr[256];
+ PGconn *conn;
+ PQExpBufferData sql;
+ PGresult *res;
+ PGresult *pkrel_res;
+ PGresult *fkrel_res;
+ char *fk_relname;
+ char *fk_nspname;
+ char *fk_attname;
+ char *pk_relname;
+ char *pk_nspname;
+ int fk, pk; /* loop counters */
if (argc != 2)
- halt("Usage: %s database\n", argv[0]);
-
- snprintf(optstr, 256, "dbname=%s", argv[1]);
- connectdb(optstr);
-
- on_error_continue();
- on_error_stop();
-
- doquery("BEGIN WORK");
- doquery("\
- DECLARE c_attributes BINARY CURSOR FOR \
- SELECT typname, relname, a.attname \
- FROM pg_class c, pg_attribute a, pg_type t \
- WHERE a.attnum > 0 AND \
- relkind = 'r' AND \
- (typname = 'oid' OR \
- typname = 'regproc' OR \
- typname = 'regclass' OR \
- typname = 'regtype') AND \
- a.attrelid = c.oid AND \
- a.atttypid = t.oid \
- ORDER BY 2, a.attnum ; \
- ");
- doquery("FETCH ALL IN c_attributes");
- attres = get_result();
-
- doquery("\
- DECLARE c_relations BINARY CURSOR FOR \
- SELECT relname \
- FROM pg_class c \
- WHERE relkind = 'r' AND relhasoids \
- ORDER BY 1; \
- ");
- doquery("FETCH ALL IN c_relations");
- relres = get_result();
-
- set_result(attres);
- while (fetch(typname, relname, attname) != END_OF_TUPLES)
{
- set_result(relres);
- reset_fetch();
- while (fetch(relname2) != END_OF_TUPLES)
+ fprintf(stderr, "Usage: %s database\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ initPQExpBuffer(&sql);
+
+ appendPQExpBuffer(&sql, "dbname=%s", argv[1]);
+
+ conn = PQconnectdb(sql.data);
+ if (PQstatus(conn) == CONNECTION_BAD)
+ {
+ fprintf(stderr, "connection error: %s\n", PQerrorMessage(conn));
+ exit(EXIT_FAILURE);
+ }
+
+ /* Get a list of relations that have OIDs */
+
+ resetPQExpBuffer(&sql);
+
+ appendPQExpBuffer(&sql, "%s",
+ "SELECT c.relname, (SELECT nspname FROM "
+ "pg_catalog.pg_namespace n WHERE n.oid = c.relnamespace) AS nspname "
+ "FROM pg_catalog.pg_class c "
+ "WHERE c.relkind = 'r' "
+ "AND c.relhasoids "
+ "ORDER BY nspname, c.relname"
+ );
+
+ res = PQexec(conn, sql.data);
+ if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
+ {
+ fprintf(stderr, "sql error: %s\n", PQerrorMessage(conn));
+ exit(EXIT_FAILURE);
+ }
+ pkrel_res = res;
+
+ /* Get a list of columns of OID type (or any OID-alias type) */
+
+ resetPQExpBuffer(&sql);
+
+ appendPQExpBuffer(&sql, "%s",
+ "SELECT c.relname, "
+ "(SELECT nspname FROM pg_catalog.pg_namespace n WHERE n.oid = c.relnamespace) AS nspname, "
+ "a.attname "
+ "FROM pg_catalog.pg_class c, pg_catalog.pg_attribute a "
+ "WHERE a.attnum > 0 AND c.relkind = 'r' "
+ "AND a.attrelid = c.oid "
+ "AND a.atttypid IN ('pg_catalog.oid'::regtype, "
+ " 'pg_catalog.regclass'::regtype, "
+ " 'pg_catalog.regoper'::regtype, "
+ " 'pg_catalog.regoperator'::regtype, "
+ " 'pg_catalog.regproc'::regtype, "
+ " 'pg_catalog.regprocedure'::regtype, "
+ " 'pg_catalog.regtype'::regtype) "
+ "ORDER BY nspname, c.relname, a.attnum"
+ );
+
+ res = PQexec(conn, sql.data);
+ if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
+ {
+ fprintf(stderr, "sql error: %s\n", PQerrorMessage(conn));
+ exit(EXIT_FAILURE);
+ }
+ fkrel_res = res;
+
+ /*
+ * For each column and each relation-having-OIDs, look to see if
+ * the column contains any values matching entries in the relation.
+ */
+
+ for (fk = 0; fk < PQntuples(fkrel_res); fk++)
+ {
+ fk_relname = PQgetvalue(fkrel_res, fk, 0);
+ fk_nspname = PQgetvalue(fkrel_res, fk, 1);
+ fk_attname = PQgetvalue(fkrel_res, fk, 2);
+
+ for (pk = 0; pk < PQntuples(pkrel_res); pk++)
{
- unset_result(relres);
- if (strcmp(typname, "oid") == 0)
- snprintf(query, 4000, "\
- DECLARE c_matches BINARY CURSOR FOR \
- SELECT count(*)::int4 \
- FROM \"%s\" t1, \"%s\" t2 \
- WHERE t1.\"%s\" = t2.oid ",
- relname, relname2, attname);
- else
- sprintf(query, 4000, "\
- DECLARE c_matches BINARY CURSOR FOR \
- SELECT count(*)::int4 \
- FROM \"%s\" t1, \"%s\" t2 \
- WHERE t1.\"%s\"::oid = t2.oid ",
- relname, relname2, attname);
-
- doquery(query);
- doquery("FETCH ALL IN c_matches");
- fetch(&count);
- if (count != 0)
- printf("Join %s.%s => %s.oid\n", relname, attname, relname2);
- doquery("CLOSE c_matches");
- set_result(relres);
+ pk_relname = PQgetvalue(pkrel_res, pk, 0);
+ pk_nspname = PQgetvalue(pkrel_res, pk, 1);
+
+ resetPQExpBuffer(&sql);
+
+ appendPQExpBuffer(&sql,
+ "SELECT 1 "
+ "FROM \"%s\".\"%s\" t1, "
+ "\"%s\".\"%s\" t2 "
+ "WHERE t1.\"%s\"::pg_catalog.oid = t2.oid "
+ "LIMIT 1",
+ fk_nspname, fk_relname, pk_nspname, pk_relname, fk_attname);
+
+ res = PQexec(conn, sql.data);
+ if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
+ {
+ fprintf(stderr, "sql error: %s\n", PQerrorMessage(conn));
+ exit(EXIT_FAILURE);
+ }
+
+ if (PQntuples(res) != 0)
+ printf("Join %s.%s.%s => %s.%s.oid\n",
+ fk_nspname, fk_relname, fk_attname,
+ pk_nspname, pk_relname);
+
+ PQclear(res);
}
- set_result(attres);
}
- set_result(relres);
- doquery("CLOSE c_relations");
- PQclear(relres);
-
- set_result(attres);
- doquery("CLOSE c_attributes");
- PQclear(attres);
- unset_result(attres);
+ PQclear(pkrel_res);
+ PQclear(fkrel_res);
+ PQfinish(conn);
- doquery("COMMIT WORK");
+ termPQExpBuffer(&sql);
- disconnectdb();
- return 0;
+ exit(EXIT_SUCCESS);
}
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