pg_dumpall v6.27.4

Extracts all databases in a WarehousePG cluster to a single script file or other archive file.

Synopsis

pg_dumpall [<connection-option> ...] [<dump_option> ...]

pg_dumpall -? | --help

pg_dumpall -V | --version

Description

pg_dumpall is a standard PostgreSQL utility for backing up all databases in a WarehousePG (or PostgreSQL) instance, and is also supported in WarehousePG. It creates a single (non-parallel) dump file. For routine backups of WarehousePG it is better to use the WarehousePG backup utility, gpbackup, for the best performance.

pg_dumpall creates a single script file that contains SQL commands that can be used as input to psql to restore the databases. It does this by calling pg_dump for each database. pg_dumpall also dumps global objects that are common to all databases. (pg_dump does not save these objects.) This currently includes information about database users and groups, and access permissions that apply to databases as a whole.

Since pg_dumpall reads tables from all databases you will most likely have to connect as a database superuser in order to produce a complete dump. Also you will need superuser privileges to run the saved script in order to be allowed to add users and groups, and to create databases.

The SQL script will be written to the standard output. Use the [-f | --file] option or shell operators to redirect it into a file.

pg_dumpall needs to connect several times to the WarehousePG coordinator server (once per database). If you use password authentication it is likely to ask for a password each time. It is convenient to have a ~/.pgpass file in such cases.

Options

Dump Options

• -a | --data-only

  Dump only the data, not the schema (data definitions). This option is only meaningful for the plain-text format. For the archive formats, you may specify the option when you call pg_restore.

• -c | --clean

  Output commands to clean (drop) database objects prior to (the commands for) creating them. This option is only meaningful for the plain-text format. For the archive formats, you may specify the option when you call pg_restore.

• -f filename | --file=filename

  Send output to the specified file.

• -g | --globals-only

  Dump only global objects (roles and tablespaces), no databases.

• -o | --oids

  Dump object identifiers (OIDs) as part of the data for every table. Use of this option is not recommended for files that are intended to be restored into WarehousePG.

• -O | --no-owner

  Do not output commands to set ownership of objects to match the original database. By default, pg_dump issues ALTER OWNER or SET SESSION AUTHORIZATION statements to set ownership of created database objects. These statements will fail when the script is run unless it is started by a superuser (or the same user that owns all of the objects in the script). To make a script that can be restored by any user, but will give that user ownership of all the objects, specify -O. This option is only meaningful for the plain-text format. For the archive formats, you may specify the option when you call pg_restore.

• -r | --roles-only

  Dump only roles, not databases or tablespaces.

• -s | --schema-only

  Dump only the object definitions (schema), not data.

• -S username | --superuser=username

  Specify the superuser user name to use when deactivating triggers. This is relevant only if --disable-triggers is used. It is better to leave this out, and instead start the resulting script as a superuser.

  Note WarehousePG does not support user-defined triggers.

• -t | --tablespaces-only

  Dump only tablespaces, not databases or roles.

• -v | --verbose

  Specifies verbose mode. This will cause [pg\_dump](pg_dump.html) to output detailed object comments and start/stop times to the dump file, and progress messages to standard error.

• -V | --version

  Print the pg_dumpall version and exit.

• -x | --no-privileges | --no-acl

  Prevent dumping of access privileges (GRANT/REVOKE commands).

• --binary-upgrade

  This option is for use by in-place upgrade utilities. Its use for other purposes is not recommended or supported. The behavior of the option may change in future releases without notice.

• --column-inserts | --attribute-inserts

  Dump data as INSERT commands with explicit column names (INSERT INTO <table> (<column>, ...) VALUES ...). This will make restoration very slow; it is mainly useful for making dumps that can be loaded into non-PostgreSQL-based databases. Also, since this option generates a separate command for each row, an error in reloading a row causes only that row to be lost rather than the entire table contents.

• --disable-dollar-quoting

  This option deactivates the use of dollar quoting for function bodies, and forces them to be quoted using SQL standard string syntax.

• --disable-triggers

  This option is relevant only when creating a data-only dump. It instructs pg_dumpall to include commands to temporarily deactivate triggers on the target tables while the data is reloaded. Use this if you have triggers on the tables that you do not want to invoke during data reload. The commands emitted for --disable-triggers must be done as superuser. So, you should also specify a superuser name with -S, or preferably be careful to start the resulting script as a superuser.

  Note WarehousePG does not support user-defined triggers.

• --inserts

  Dump data as INSERT commands (rather than COPY). This will make restoration very slow; it is mainly useful for making dumps that can be loaded into non-PostgreSQL-based databases. Also, since this option generates a separate command for each row, an error in reloading a row causes only that row to be lost rather than the entire table contents. Note that the restore may fail altogether if you have rearranged column order. The --column-inserts option is safe against column order changes, though even slower.

• --lock-wait-timeout=timeout

  Do not wait forever to acquire shared table locks at the beginning of the dump. Instead, fail if unable to lock a table within the specified timeout. The timeout may be specified in any of the formats accepted by SET statement_timeout. Allowed values vary depending on the server version you are dumping from, but an integer number of milliseconds is accepted by all WarehousePG versions.

• --no-security-labels

  Do not dump security labels.

• --no-tablespaces

  Do not output commands to select tablespaces. With this option, all objects will be created in whichever tablespace is the default during restore.

• --no-unlogged-table-data

  Do not dump the contents of unlogged tables. This option has no effect on whether or not the table definitions (schema) are dumped; it only suppresses dumping the table data.

• --quote-all-identifiers

  Force quoting of all identifiers. This option is recommended when dumping a database from a server whose WarehousePG major version is different from pg_dumpall's, or when the output is intended to be loaded into a server of a different major version. By default, pg_dumpall quotes only identifiers that are reserved words in its own major version. This sometimes results in compatibility issues when dealing with servers of other versions that may have slightly different sets of reserved words. Using --quote-all-identifiers prevents such issues, at the price of a harder-to-read dump script.

• --resource-queues

  Dump resource queue definitions.

• --resource-groups

  Dump resource group definitions.

• --use-set-session-authorization

  Output SQL-standard SET SESSION AUTHORIZATION commands instead of ALTER OWNER commands to determine object ownership. This makes the dump more standards compatible, but depending on the history of the objects in the dump, may not restore properly. A dump using SET SESSION AUTHORIZATION will require superuser privileges to restore correctly, whereas ALTER OWNER requires lesser privileges.

• --gp-syntax

  Output WarehousePG syntax in the CREATE TABLE statements. This allows the distribution policy (DISTRIBUTED BY or DISTRIBUTED RANDOMLY clauses) of a WarehousePG table to be dumped, which is useful for restoring into other WarehousePG clusters.

• --no-gp-syntax

  Do not output the table distribution clauses in the CREATE TABLE statements.

• -? | --help

  Show help about pg_dumpall command line arguments, and exit.

Connection Options

• -d connstr | --dbname=connstr

  Specifies parameters used to connect to the server, as a connection string. See Connection Strings in the PostgreSQL documentation for more information.

  The option is called --dbname for consistency with other client applications, but because pg_dumpall needs to connect to many databases, the database name in the connection string will be ignored. Use the -l option to specify the name of the database used to dump global objects and to discover what other databases should be dumped.

• -h host | --host=host

  The host name of the machine on which the WarehousePG coordinator database server is running. If not specified, reads from the environment variable PGHOST or defaults to localhost.

• -l dbname | --database=dbname

  Specifies the name of the database in which to connect to dump global objects. If not specified, the postgres database is used. If the postgres database does not exist, the template1 database is used.

• -p port | --port=port

  The TCP port on which the WarehousePG coordinator database server is listening for connections. If not specified, reads from the environment variable PGPORT or defaults to 5432.

• -U username | --username= username

  The database role name to connect as. If not specified, reads from the environment variable PGUSER or defaults to the current system role name.

• -w | --no-password

  Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a .pgpass file the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a password.

• -W | --password

  Force a password prompt.

• --role=rolename

  Specifies a role name to be used to create the dump. This option causes pg_dumpall to issue a SET ROLE <rolename> command after connecting to the database. It is useful when the authenticated user (specified by -U) lacks privileges needed by pg_dumpall, but can switch to a role with the required rights. Some installations have a policy against logging in directly as a superuser, and use of this option allows dumps to be made without violating the policy.

Notes

Since pg_dumpall calls pg_dump internally, some diagnostic messages will refer to pg_dump.

Once restored, it is wise to run ANALYZE on each database so the query planner has useful statistics. You can also run vacuumdb -a -z to vacuum and analyze all databases.

pg_dumpall requires all needed tablespace directories to exist before the restore; otherwise, database creation will fail for databases in non-default locations.

Examples

To dump all databases:

pg_dumpall > db.out

To reload database(s) from this file, you can use:

psql template1 -f db.out

To dump only global objects (including resource queues):

pg_dumpall -g --resource-queues

See Also

pg_dump