-
findoidjoins
-This program scans the a database, and prints oid fields, and the tables
-they join to. PostgreSQL version 6.3.2 crashes with aggregates on
-views, so I have removed the view pg_user from the list of relations to
-examine.
+This program scans a database, and prints oid 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.
+
+It requires pgsql/contrib/pginterface to be compiled first.
-It requires /pgsql/contrib/pginterface to be compiled first.
+Run on an empty database, it returns the system join relationships
+(shown below for 6.5). 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.
-Run on am empty database, it returns the system join relationships:
+The shell script make_oidjoins_check converts findoidjoins' output
+into an SQL script that checks for dangling links (entries in an
+OID column that don't match any row in the expected table).
+The result of this script 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...)
---------------------------------------------------------------------------
Join pg_aggregate.aggtransfn1 => pg_proc.oid
Join pg_aggregate.aggtransfn2 => pg_proc.oid
Join pg_aggregate.aggfinalfn => pg_proc.oid
-Join pg_aggregate.aggbasetype => pg_proc.oid
Join pg_aggregate.aggbasetype => pg_type.oid
-Join pg_aggregate.aggtranstype1 => pg_proc.oid
Join pg_aggregate.aggtranstype1 => pg_type.oid
Join pg_aggregate.aggtranstype2 => pg_type.oid
-Join pg_aggregate.aggfinaltype => pg_proc.oid
Join pg_aggregate.aggfinaltype => pg_type.oid
Join pg_am.amgettuple => pg_proc.oid
Join pg_am.aminsert => 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_amop.amopopr => pg_proc.oid
Join pg_amop.amopselect => pg_proc.oid
Join pg_amop.amopnpages => pg_proc.oid
Join pg_amproc.amid => pg_am.oid
Join pg_amproc.amopclaid => pg_opclass.oid
-Join pg_amproc.amopclaid => pg_operator.oid
-Join pg_amproc.amopclaid => pg_proc.oid
-Join pg_amproc.amproc => pg_operator.oid
Join pg_amproc.amproc => pg_proc.oid
Join pg_attribute.attrelid => pg_class.oid
Join pg_attribute.atttypid => pg_type.oid
Join pg_proc.prorettype => pg_type.oid
Join pg_rewrite.ev_class => pg_class.oid
Join pg_type.typrelid => pg_class.oid
-Join pg_type.typelem => pg_operator.oid
-Join pg_type.typelem => pg_proc.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)
-:
+#! /bin/sh
+
# You first run findoidjoins on the template1 database, and send that
# output into this file to generate a list of SQL statements.
+
+# NOTE: any field that findoidjoins thinks joins to more than one table
+# will NOT be checked by the output of this script. You should be
+# suspicious of multiple entries in findoidjoins' output.
+
+# Caution: you may need to use GNU awk.
+AWK=${AWK:-awk}
+
trap "rm -f /tmp/$$ /tmp/$$a /tmp/$$b" 0 1 2 3 15
+# Read input
cat "$@" >/tmp/$$
+
+# Look for fields with multiple references.
cat /tmp/$$ | cut -d' ' -f2 | sort | uniq -d >/tmp/$$a
+if [ -s /tmp/$$a ] ; then
+ echo "Ignoring these fields that link to multiple tables:" 1>&2
+ cat /tmp/$$a 1>&2
+fi
+
+# Get the non-multiply-referenced fields.
cat /tmp/$$ | while read LINE
do
set -- $LINE
grep "$2" /tmp/$$a >/dev/null 2>&1 || echo $LINE
done >/tmp/$$b
+
+# Generate the output.
cat /tmp/$$b |
-awk -F'[ \.]' '\
+$AWK -F'[ \.]' '\
BEGIN \
{
printf "\
printf "\
SELECT oid, %s.%s \n\
FROM %s \n\
-WHERE %s%s.%s%s NOT IN (SELECT oid FROM %s) AND \n\
- %s%s.%s%s != 0;\n", $2, $3, $2,
- ($5 == "pg_proc") ? "RegprocToOid(" : "",
- $2, $3,
- ($5 == "pg_proc") ? ")" : "",
- $5,
- ($5 == "pg_proc") ? "RegprocToOid(" : "",
- $2, $3,
- ($5 == "pg_proc") ? ")" : "";
+WHERE %s.%s != 0 AND \n\
+ NOT EXISTS(SELECT * FROM %s AS t1 WHERE t1.oid = %s.%s);\n",
+ $2, $3, $2,
+ $2, $3,
+ $5, $2, $3;
}'
+
+exit 0
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