mirror of
https://github.com/timescale/timescaledb.git
synced 2025-05-17 19:13:16 +08:00
997556af40
Using pg_dump/pg_restore for a database with hypertables will back up all internal tables too, which is sometimes not desired. These scripts allow one to backup regular PostgreSQL tables separately and then pick and choose which hypertables to backup and restore. This also provides a forward-compatible way of backing up and restoring hypertables, since data is dumped to CSV and restored by re-creating and re-inserting the data.
40 lines
1.6 KiB
Bash
Executable File
40 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
|
|
# This script is used for backing up a single hypertable into an easy-to-restore
|
|
# tarball. The tarball contains two files: (1) a .sql file for recreating the
|
|
# hypertable and its indices and (2) a .csv file containing the data as CSV.
|
|
#
|
|
# Because pg_dump/pg_restore dump all of TimescaleDB's internal tables when
|
|
# used, this script is useful if you want a backup that can be restored
|
|
# regardless of TimescaleDB version running, or as part of a process where you
|
|
# do not want to always backup all your hypertables at once.
|
|
|
|
|
|
if [[ -z "$1" || -z "$2" ]]; then
|
|
echo "Usage: $0 hypertable output_name [pg_dump CONNECTION OPTIONS]"
|
|
echo " hypertable - Hypertable to backup"
|
|
echo " output_name - Output files will be stored in an archive named [output_name].tar.gz"
|
|
echo " "
|
|
echo "Any connection options for pg_dump/psql (e.g. -d database, -U username) should be listed at the end"
|
|
exit 1
|
|
fi
|
|
|
|
HYPERTABLE=$1
|
|
PREFIX=$2
|
|
|
|
shift 2
|
|
set -e
|
|
echo "Backing up schema as $PREFIX-schema.sql..."
|
|
pg_dump $@ --schema-only -t $HYPERTABLE -f $PREFIX-schema.sql
|
|
echo "--" >> $PREFIX-schema.sql
|
|
echo "-- Restore to hypertable" >> $PREFIX-schema.sql
|
|
echo "--" >> $PREFIX-schema.sql
|
|
psql $@ -qAtX -c "SELECT _timescaledb_internal.get_create_command('$HYPERTABLE');" >> $PREFIX-schema.sql
|
|
|
|
echo "Backing up data as $PREFIX-data.csv..."
|
|
psql $@ -c "\COPY (SELECT * FROM $HYPERTABLE) TO $PREFIX-data.csv DELIMITER ',' CSV"
|
|
|
|
echo "Archiving and removing previous files..."
|
|
tar -czvf $PREFIX.tar.gz $PREFIX-data.csv $PREFIX-schema.sql
|
|
rm $PREFIX-data.csv
|
|
rm $PREFIX-schema.sql
|