March 6, 2022

PostgreSQL pg_dump utility

pg_dump utility in PostgreSQL

pg_dump # to take backup of single postgres database
pg_dump --help
pg_dump -V

pg_dump proddb > /opt/backups/prod_backup 
pg_dump -U postgres -d devdb > /home/pgsql/backups/devdb_bkp
pg_dump -U postgres testdb -Fc > testdb.dump

pg_dump -p 5301 testdb
pg_dump -p 5313 -f export.sql testdb
pg_dump -p 5435 -v testdb > export.sql

pg_dump -p 5333 testdb -F p -h localhost
pg_dump -p 5348 testdb -F c > export.dmp
pg_dump -Fc
pg_dump -U username -W -F t database_name > c:\backup_file.tar
pg_dump -Fc mydb > db.dump
pg_dump -Ft mydb > backup.tar
pg_dump -Fd mydb > db_backup

pg_dump devdb | gzip /opt/backups/devdb.gz
pg_dump | split -b 1m - /usr/backups/database_backup

pg_dump -p 5303 testdb -f export.sql -s                              # schema only
pg_dump -t products testdb --schema-only > test.sql         # get DDL statements
pg_dump -h postgres-aurora-demo.cluster-czjdkvo2yd1y.us-west-2.rds.amazonaws.com -p1526 -U dbadmin -d scott -f apg_west_export.sql --schema-only

pg_dump -p 5432 testdb -f export.sql -a                      # data only
pg_dump -p 5436 testdb -f user_export.sql -n scott
pg_dump -p 5432 testdb -f emp_export.sql -t emp -v
pg_dump -h localhost -p 5454 U edb -f inserts_store.sql --inserts estore
pg_dump -Fc --no-acl -h localhost -U USER_NAME DB_NAME > backup.dump

pg_dump --schema-only --section=pre-data > pre-schema-ddl.sql
pg_dump --schema-only --section=post-data > post-schema-ddl.sql # with indexes and FKs etc.
pg_dump -h aurora-demo-db.cluster-czjdkvo2yd1y.us-west-2.rds.amazonaws.com -p1526 -U dbadmin -d scott -f scott.employee_old_export.sql --table scott.employee_old
pg_dump -a -t my_table my_db | psql target_db # copy table data from one db to another
pg_dump -a -t employee -h aurora-demo-db.cluster-czjdkvo2yd1y.us-west-2.rds.amazonaws.com -p1526 -U dbadmin -d scott | psql -h aurora-demo-db.cluster-czjdkvo2yd1y.us-west-2.rds.amazonaws.com -p1526 -U dbadmin -d scott
nohup pg_dump -a -t employee_part1 -h aurora-demo-db.cluster-czjdkvo2yd1y.us-west-2.rds.amazonaws.com -p1526 -U dbadmin -d scott | psql -h aurora-demo-db.cluster-czjdkvo2yd1y.us-west-2.rds.amazonaws.com -p1526 -U dbadmin -d scott &
pg_dump -h publisher_server_ip -p 5432 -d percona -Fc -s -U postgres | pg_restore -d percona -h subscriber_node_ip -p 5432 -U postgres

pg_dump --help
Usage:
  pg_dump [OPTION]... [DBNAME]

General options:
  -f, --file=FILENAME          output file or directory name
  -F, --format=c|d|t|p         output file format (custom, directory, tar, plain text (default))
  -j, --jobs=NUM               use this many parallel jobs to dump
  -v, --verbose                verbose mode
  -V, --version                output version information, then exit
  -Z, --compress=0-9           compression level for compressed formats
  --lock-wait-timeout=TIMEOUT  fail after waiting TIMEOUT for a table lock
  --no-sync                    do not wait for changes to be written safely to disk
  -?, --help                   show this help, then exit

Options controlling the output content:
  -a, --data-only              dump only the data, not the schema
  -b, --blobs                  include large objects in dump
  -B, --no-blobs               exclude large objects in dump
  -c, --clean                  clean (drop) database objects before recreating
  -C, --create                 include commands to create database in dump
  -e, --extension=PATTERN      dump the specified extension(s) only
  -E, --encoding=ENCODING      dump the data in encoding ENCODING
  -n, --schema=PATTERN         dump the specified schema(s) only
  -N, --exclude-schema=PATTERN do NOT dump the specified schema(s)
  -O, --no-owner               skip restoration of object ownership in plain-text format
  -s, --schema-only            dump only the schema, no data
  -S, --superuser=NAME         superuser user name to use in plain-text format
  -t, --table=PATTERN          dump the specified table(s) only
  -T, --exclude-table=PATTERN  do NOT dump the specified table(s)
  -x, --no-privileges          do not dump privileges (grant/revoke)
  --binary-upgrade             for use by upgrade utilities only
  --column-inserts             dump data as INSERT commands with column names
  --disable-dollar-quoting     disable dollar quoting, use SQL standard quoting
  --disable-triggers           disable triggers during data-only restore
  --enable-row-security        enable row security (dump only content user has access to)
  --exclude-table-data=PATTERN do NOT dump data for the specified table(s)
  --extra-float-digits=NUM     override default setting for extra_float_digits
  --if-exists                  use IF EXISTS when dropping objects
  --include-foreign-data=PATTERN include data of foreign tables on foreign servers matching PATTERN
  --inserts                    dump data as INSERT commands, rather than COPY
  --load-via-partition-root    load partitions via the root table
  --no-comments                do not dump comments
  --no-publications            do not dump publications
  --no-security-labels         do not dump security label assignments
  --no-subscriptions           do not dump subscriptions
  --no-synchronized-snapshots  do not use synchronized snapshots in parallel jobs
  --no-tablespaces             do not dump tablespace assignments
  --no-toast-compression       do not dump TOAST compression methods
  --no-unlogged-table-data     do not dump unlogged table data
  --on-conflict-do-nothing     add ON CONFLICT DO NOTHING to INSERT commands
  --quote-all-identifiers      quote all identifiers, even if not key words
  --rows-per-insert=NROWS      number of rows per INSERT; implies --inserts
  --section=SECTION            dump named section (pre-data, data, or post-data)
  --serializable-deferrable    wait until the dump can run without anomalies
  --snapshot=SNAPSHOT          use given snapshot for the dump
  --strict-names               require table and/or schema include patterns to match at least one entity each
  --use-set-session-authorization  use SET SESSION AUTHORIZATION commands instead of ALTER OWNER commands to set ownership

Connection options:
  -d, --dbname=DBNAME      database to dump
  -h, --host=HOSTNAME      database server host or socket directory
  -p, --port=PORT          database server port number
  -U, --username=NAME      connect as specified database user
  -w, --no-password        never prompt for password
  -W, --password           force password prompt (should happen automatically)
  --role=ROLENAME          do SET ROLE before dump

Related PostgreSQL Articles: psql utility   PostgreSQL/Aurora Postgres DBA Interview Questions Part2

No comments:

Post a Comment