mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-27 08:39:28 +08:00
Handle int4-int8 sequence migration without full data dump.
This commit is contained in:
parent
f43b5de649
commit
6bd45e5264
@ -1,5 +1,5 @@
|
||||
<!--
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/ref/Attic/pg_upgrade.sgml,v 1.15 2002/01/10 04:58:19 momjian Exp $
|
||||
$Header: /cvsroot/pgsql/doc/src/sgml/ref/Attic/pg_upgrade.sgml,v 1.16 2002/01/11 04:39:19 momjian Exp $
|
||||
PostgreSQL documentation
|
||||
-->
|
||||
|
||||
@ -24,7 +24,7 @@ PostgreSQL documentation
|
||||
<date>1999-07-31</date>
|
||||
</refsynopsisdivinfo>
|
||||
<synopsis>
|
||||
pg_upgrade -s <replaceable class="parameter">filename</replaceable> [ -d <replaceable class="parameter">filename</replaceable> ] <replaceable class="parameter">old_data_dir</replaceable>
|
||||
pg_upgrade -s <replaceable class="parameter">filename</replaceable> <replaceable class="parameter">old_data_dir</replaceable>
|
||||
</synopsis>
|
||||
</refsynopsisdiv>
|
||||
|
||||
@ -50,10 +50,14 @@ pg_upgrade -s <replaceable class="parameter">filename</replaceable> [ -d <replac
|
||||
<step performance="required">
|
||||
<para>
|
||||
Back up your existing data directory, preferably by making a
|
||||
complete dump with pg_dumpall. Those upgrading from 7.1 are
|
||||
required to supply this dump filename to pg_upgrade with the
|
||||
<option>-d</option> option. Other releases should not use the
|
||||
<option>-d</option> option.
|
||||
complete dump with pg_dumpall.
|
||||
</para>
|
||||
</step>
|
||||
|
||||
<step performance="required">
|
||||
<para>
|
||||
<command>VACUUM</command> your entire database using
|
||||
<command>vacuumdb -a</command.>
|
||||
</para>
|
||||
</step>
|
||||
|
||||
@ -111,7 +115,7 @@ $ make install
|
||||
Change your working directory to the
|
||||
pgsql main directory, and type:
|
||||
<programlisting>
|
||||
$ pg_upgrade -s schema.out -d data.out data.old
|
||||
$ pg_upgrade -s schema.out data.old
|
||||
</programlisting>
|
||||
The program will do some checking to make sure everything is properly
|
||||
configured, and will run your db.out script to recreate all the databases
|
||||
@ -130,12 +134,6 @@ $ pg_upgrade -s schema.out -d data.out data.old
|
||||
</para>
|
||||
</step>
|
||||
|
||||
<step performance="required">
|
||||
<para>
|
||||
Stop and restart the postmaster.
|
||||
</para>
|
||||
</step>
|
||||
|
||||
<step performance="required">
|
||||
<para>
|
||||
<emphasis>Carefully</emphasis> examine the contents of the upgraded
|
||||
@ -154,6 +152,11 @@ $ pg_upgrade -s schema.out -d data.out data.old
|
||||
</para>
|
||||
</step>
|
||||
|
||||
<note>
|
||||
<para>
|
||||
pg_upgrade does not migrate large objects.
|
||||
</para>
|
||||
</note>
|
||||
</procedure>
|
||||
</refsect1>
|
||||
</refentry>
|
||||
|
@ -3,7 +3,7 @@
|
||||
# pg_upgrade: update a database without needing a full dump/reload cycle.
|
||||
# CAUTION: read the manual page before trying to use this!
|
||||
|
||||
# $Header: /cvsroot/pgsql/src/bin/pg_dump/Attic/pg_upgrade,v 1.23 2002/01/11 00:27:42 momjian Exp $
|
||||
# $Header: /cvsroot/pgsql/src/bin/pg_dump/Attic/pg_upgrade,v 1.24 2002/01/11 04:39:19 momjian Exp $
|
||||
#
|
||||
# NOTE: we must be sure to update the version-checking code a few dozen lines
|
||||
# below for each new PostgreSQL release.
|
||||
@ -13,7 +13,6 @@ TMPFILE="/tmp/pgupgrade.$$"
|
||||
trap "rm -f $TMPFILE" 0 1 2 3 15
|
||||
|
||||
SCHEMA=""
|
||||
DATA=""
|
||||
while [ "$#" -gt 1 ]
|
||||
do
|
||||
if [ "X$1" = "X-s" ]
|
||||
@ -23,20 +22,13 @@ do
|
||||
exit 1
|
||||
fi
|
||||
shift 2
|
||||
elif [ "X$1" = "X-d" ]
|
||||
then DATA="$2"
|
||||
if [ ! -s "$DATA" ]
|
||||
then echo "$DATA does not exist" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
shift 2
|
||||
else echo "Usage: $0 -s schema_dump [ -d data_dump ] old_data_dir" 1>&2
|
||||
else echo "Usage: $0 -s schema_dump old_data_dir" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
done
|
||||
|
||||
if [ "$#" -ne 1 -o ! "$SCHEMA" ]
|
||||
then echo "Usage: $0 -s schema_dump [ -d data_dump ] old_data_dir" 1>&2
|
||||
then echo "Usage: $0 -s schema_dump old_data_dir" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
@ -86,21 +78,6 @@ SRC_VERSION=`cat ./$OLDDIR/PG_VERSION`
|
||||
# UPGRADE_VERSION is the expected output database version
|
||||
UPGRADE_VERSION="7.1"
|
||||
|
||||
if [ "$SRC_VERSION" = "7.1" -a ! "$DATA" ]
|
||||
then echo "$0 requires a full data dump file to upgrade from version $SRC_VERSION." 1>&2
|
||||
echo "Use the '-d' parameter to specify the data dump file" 1>&2
|
||||
echo "If you don't have enough disk space to keep a dump file, grep out the '\\connect' and" 1>&2
|
||||
echo "'SELECT setval' lines from the dump file and pass that file to $0, e.g:" 1>&2
|
||||
echo 1>&2
|
||||
echo " pg_dumpall | egrep '^(\\connect)|SELECT setval \()[^ ]*$' > data.out" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ "$SRC_VERSION" != "7.1" -a "$DATA" ]
|
||||
then echo "$0 does not require the -d option for this version." 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ "$DEST_VERSION" != "$UPGRADE_VERSION" -a "$DEST_VERSION" != "$SRC_VERSION" ]
|
||||
then echo "`basename $0` is for PostgreSQL version $UPGRADE_VERSION, but ./data/PG_VERSION contains $DEST_VERSION." 1>&2
|
||||
echo "Did you run initdb for version $UPGRADE_VERSION?" 1>&2
|
||||
@ -134,8 +111,8 @@ Install a newer version from pgsql/contrib/pg_resetxlog and continue.; exiting"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# We need a high XID number so there is 1 gig gap in XID numbers so the
|
||||
# moved-over rows can be frozen on next VACUUM.
|
||||
# If the XID is > 2 billion, 7.1 database will have non-frozen XID's in
|
||||
# low numbers, and 7.2 will think they are in the future --- bad.
|
||||
|
||||
XID=`pg_resetxlog -n "$OLDDIR" | grep "NextXID" | awk -F' *' '{print $4}'`
|
||||
if [ "$SRC_VERSION" = "7.1" -a "$XID" -gt 2000000000 ]
|
||||
@ -171,26 +148,11 @@ $0 aborted." 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Set sequence values for 7.1-version sequences, which are int4.
|
||||
if [ "$SRC_VERSION" != "7.1" ]
|
||||
then echo "Input script $SCHEMA complete, fixing row commit statuses..."
|
||||
else echo "Input script $SCHEMA complete, setting int8 sequences..."
|
||||
echo "Input script $SCHEMA complete, fixing row commit statuses..."
|
||||
|
||||
# Set all the sequence counters because they are not brought over
|
||||
# in the schema dump.
|
||||
cat $DATA | egrep '^(\\connect)|SELECT setval \()[^ ]*$' |
|
||||
psql "template1"
|
||||
if [ $? -ne 0 ]
|
||||
then echo "There were errors in setting the sequence values.
|
||||
$0 aborted." 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
echo "Int8 sequences set, fixing row commit statuses..."
|
||||
fi
|
||||
|
||||
# Now vacuum each result database in case our transaction increase
|
||||
# causes all the XID's to be marked with the frozen XID.
|
||||
# XXX do we still need this?
|
||||
# Now vacuum each result database because our movement of transaction log
|
||||
# causes some committed transactions to appear as non-committed
|
||||
|
||||
psql -d template1 -At -c "SELECT datname FROM pg_database" | while read DB
|
||||
do
|
||||
@ -337,6 +299,82 @@ then echo "Unable to restart database server.; exiting" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Set sequence values for 7.1-version sequences, which were int4.
|
||||
if [ "$SRC_VERSION" = "7.1" ]
|
||||
else echo "Set int8 sequence values from 7.1..."
|
||||
|
||||
psql -d template1 -At -c "SELECT datname FROM pg_database" |
|
||||
while read DB
|
||||
do
|
||||
echo "$DB"
|
||||
# XXX is concurrency a problem here?
|
||||
psql -d "$DB" -At -c "SELECT relname FROM pg_class where relkind = 'S';" |
|
||||
while read SEQUENCE
|
||||
do
|
||||
psql -d "$DB" -At <<SQL_END
|
||||
|
||||
-- This table matches the 7.1 sequence schema
|
||||
CREATE TABLE temp_seq_int4 (
|
||||
sequence_name name
|
||||
last_value integer
|
||||
increment_by integer
|
||||
max_value integer
|
||||
min_value integer
|
||||
cache_value integer
|
||||
log_cnt integer
|
||||
is_cycled "char"
|
||||
is_called "char"
|
||||
);
|
||||
|
||||
-- Move int8 version of sequence out of the way
|
||||
UPDATE pg_attribute
|
||||
SET attrelid = 1 -- OID of template1, not used anywhere else XXX correct?
|
||||
WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = '$SEQUENCE');
|
||||
|
||||
-- Replace with int4 sequence schema
|
||||
UPDATE pg_attribute
|
||||
SET attrelid = (SELECT oid FROM pg_class WHERE relname = '$SEQUENCE')
|
||||
WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = 'temp_seq_int4');
|
||||
|
||||
-- Select sequence value into temp table
|
||||
CREATE TEMP TABLE hold_sequence AS
|
||||
SELECT last_value
|
||||
FROM "$SEQUENCE"
|
||||
|
||||
-- Prepare int4 sequence table for removal and remove it
|
||||
UPDATE pg_attribute
|
||||
SET attrelid = (SELECT oid FROM pg_class WHERE relname = 'temp_seq_int4')
|
||||
WHERE attrelid = (SELECT oid FROM pg_class WHERE relname = '$SEQUENCE');
|
||||
|
||||
DROP TABLE temp_seq_int4;
|
||||
|
||||
-- Restore int8 version of sequence
|
||||
UPDATE pg_attribute
|
||||
SET attrelid = (SELECT oid FROM pg_class WHERE relname = '$SEQUENCE')
|
||||
WHERE attrelid = 1;
|
||||
|
||||
-- Mark sequence as ordinary table and update it
|
||||
UPDATE pg_class
|
||||
SET relkind = 't'
|
||||
WHERE relname = '$SEQUENCE';
|
||||
|
||||
UPDATE "$SEQUENCE"
|
||||
SET last_value = (SELECT last_value FROM hold_sequence);
|
||||
|
||||
-- Restore sequence flag
|
||||
UPDATE pg_class
|
||||
SET relkind = 'S'
|
||||
WHERE relname = '$SEQUENCE';
|
||||
|
||||
SQL_END
|
||||
if [ $? -ne 0 ]
|
||||
then echo "There were errors during int4 sequence restore.
|
||||
$0 aborted." 1>&2
|
||||
exit 1
|
||||
done
|
||||
done
|
||||
fi
|
||||
|
||||
echo "You may remove the $OLDDIR directory with 'rm -r $OLDDIR'."
|
||||
|
||||
exit 0
|
||||
|
Loading…
Reference in New Issue
Block a user