The following bug has been logged on the website:
Bug reference: 6682
Logged by: Philippe BEAUDOIN
Email address: phb.emaj@free.fr
PostgreSQL version: 9.1.4
Operating system: Linux
Description:=20=20=20=20=20=20=20=20
When a table is registered as an extension configuration table and contains
a serial column, the current value of the sequence associated to this serial
column is not dumped by pg_dump.
Here is a test case to easily reproduce this issue.
Just copy/paste and adjust initial parameters.
#!/bin/sh
export PGINST=3D/usr/local/pg913
export PGBIN=3D$PGINST/bin
export PGEXT=3D$PGINST/share/postgresql/extension
export PGHOST=3Dlocalhost
export PGPORT=3D5913
export PGUSER=3Dpostgres
export PGDATABASE=3Dphb
echo
"-----------------------------------------------------------------------"
echo " Issue: pg_dump doesn't record sequence values of serial columns for
"
echo " tables registered by pg_extension_config_dump()"
echo
"-----------------------------------------------------------------------"
echo Connection parameters: $PGHOST - $PGPORT - $PGUSER - $PGDATABASE
# Build the extension control file
cat >$PGINST/share/postgresql/extension/phb.control <<EOF=20
default_version =3D '1.0.0'
schema =3D phb
EOF
# Create a test database
$PGBIN/psql template1 -ac "drop database phb;"
$PGBIN/psql template1 -ac "create database phb;"
# create the create extension script
cat >$PGEXT/phb--1.0.0.sql <<EOF=20
create table tbl1 (col1 serial not null primary key, col2 int);
select pg_catalog.pg_extension_config_dump('tbl1','');
create sequence seq1;
EOF
echo "--> Create the extension"
$PGBIN/psql -ac "create extension phb;"
$PGBIN/psql -ac "\dx+ phb"
echo "--> Use the extension and look at the impact"
$PGBIN/psql -ac "insert into phb.tbl1 (col2) values (1),(2),(3);"
$PGBIN/psql -ac "select setval('phb.seq1',10);"
$PGBIN/psql -ac "select * from phb.tbl1;"
$PGBIN/psql -ac "select * from phb.tbl1_col1_seq;"
$PGBIN/psql -ac "select * from phb.seq1;"
echo "--> OK, now dump the phb database"
$PGBIN/pg_dump -Fp -f phb.dump
echo "--> Cleanup and recreate the database"
$PGBIN/psql template1 -ac "drop database phb;"
$PGBIN/psql template1 -ac "create database phb;"
echo "--> Restore the phb database"
$PGBIN/psql -f phb.dump
echo "--> Look at the result: the sequences start values equal 1 !!! "
$PGBIN/psql -ac "\dx+ phb"
$PGBIN/psql -ac "select * from phb.tbl1;"
$PGBIN/psql -ac "select * from phb.tbl1_col1_seq;"
$PGBIN/psql -ac "select * from phb.seq1;"
echo "--> Of course inserting a new row results in duplicate key errors"
$PGBIN/psql -ac "insert into phb.tbl1 (col2) values (4);"
echo "--> And sequences cannot be registered as 'content to be dumped'"
$PGBIN/psql -ac "select
pg_catalog.pg_extension_config_dump('tbl1_col1_seq','');"
$PGBIN/psql -ac "select pg_catalog.pg_extension_config_dump('seq1','');"
# cleanup the environment
$PGBIN/psql template1 -ac "drop database phb;"
rm $PGINST/share/postgresql/extension/phb*
rm phb.dump