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#!/bin/sh
#
# pg_upgrade: update a database without needing a full dump/reload cycle
# CAUTION: read the manual page before trying to use this!
trap "rm -f /tmp/$$" 0 1 2 3 15
if [ "$#" -eq 0 ]
then echo "Usage: $0 [-f inputfile] old_data_dir" 1>&2
exit 1
fi
if [ "X$1" = "X-f" ]
then INPUT="$2"
shift 2
if [ ! -f "$INPUT" ]
then echo "$INPUT does not exist" 1>&2
exit 1
fi
else INPUT=""
fi
if [ "$#" -ne 1 ]
then echo "Usage: $0 [-f inputfile] old_data_dir" 1>&2
exit 1
fi
OLDDIR="$1"
# check things
if [ ! -f "./lib/global1.bki.source" ]
then echo "$0 must be run from the top of the postgres directory tree." 1>&2
exit 1
fi
if [ ! -d "./$OLDDIR" ]
then echo "You must rename your old /data directory to /$OLDDIR and run initdb." 1>&2
exit 1
fi
if [ ! -d "./$OLDDIR/base/template1" ]
then echo "There is not database template1 in ./$OLDDIR/base." 1>&2
exit 1
fi
if [ ! -d "./data" ]
then echo "You must run initdb to create the template1 database." 1>&2
exit 1
fi
if [ ! -d "./data/base/template1" ]
then echo "$0 must be run as the postgres superuser." 1>&2
exit 1
fi
# do I need to create a database?
# remove any COPY statements
# we don't even need pgdump_oid because we are moving pg_variable
# then shouldn't be in there anyway
cat $INPUT | awk ' {
if (toupper($1) == "COPY" && $2 != "pg_shadow")
while (getline $0 > 0 && $0 != "\\.")
;
else print $0;
}' >/tmp/$$
#create empty tables/indexes
psql "template1" <"/tmp/$$"
if [ $? -ne 0 ]
then echo "psql failed to execute $INPUT script." 1>&2
exit 1
fi
for DIR in data/base/*
do
BASEDIR="`basename $DIR`"
if [ -d "$DIR" -a \
-d "$OLDDIR/base/$BASEDIR" -a \( "$BASEDIR" != "template1" \) ]
then for FILE in $OLDDIR/base/$BASEDIR/*
do
BASEFILE="`basename $FILE`"
if [ `expr "$BASEFILE" : "pg_"` -ne 3 -a \
"$BASEFILE" != "PG_VERSION" ]
then mv $FILE $DIR
fi
done
fi
done
mv $OLDDIR/pg_log data
mv $OLDDIR/pg_variable data
echo "You may remove the $OLDDIR directory with 'rm -r $OLDDIR'."
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