community.postgresql.postgresql_query module – Run PostgreSQL queries

Note

This module is part of the community.postgresql collection (version 1.7.4).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.postgresql.

To use it in a playbook, specify: community.postgresql.postgresql_query.

Synopsis

  • Runs arbitrary PostgreSQL queries.

  • Can run queries from SQL script files.

  • Does not run against backup files. Use community.postgresql.postgresql_db with state=restore to run queries on files made by pg_dump/pg_dumpall utilities.

Requirements

The below requirements are needed on the host that executes this module.

  • psycopg2

Parameters

Parameter

Comments

as_single_query

boolean

added in 1.1.0 of community.postgresql

If yes, when reading from the path_to_script file, executes its whole content in a single query.

When yes, the query_all_results return value contains only the result of the last statement.

Whether the state is reported as changed or not is determined by the last statement of the file.

Used only when path_to_script is specified, otherwise ignored.

If set to no, the script can contain only semicolon-separated queries. (see the path_to_script option documentation).

The default value is no.

Choices:

  • no

  • yes

autocommit

boolean

Execute in autocommit mode when the query can’t be run inside a transaction block (e.g., VACUUM).

Mutually exclusive with check_mode.

Choices:

  • no ← (default)

  • yes

ca_cert

aliases: ssl_rootcert

string

Specifies the name of a file containing SSL certificate authority (CA) certificate(s).

If the file exists, the server’s certificate will be verified to be signed by one of these authorities.

db

aliases: login_db

string

Name of database to connect to and run queries against.

encoding

string

added in 0.2.0 of community.postgresql

Set the client encoding for the current session (e.g. UTF-8).

The default is the encoding defined by the database.

login_host

string

Host running the database.

If you have connection issues when using localhost, try to use 127.0.0.1 instead.

login_password

string

The password this module should use to establish its PostgreSQL session.

login_unix_socket

string

Path to a Unix domain socket for local connections.

login_user

string

The username this module should use to establish its PostgreSQL session.

Default: “postgres”

named_args

dictionary

Dictionary of key-value arguments to pass to the query. When the value is a list, it will be converted to PostgreSQL array.

Mutually exclusive with positional_args.

path_to_script

path

Path to a SQL script on the target machine.

If the script contains several queries, they must be semicolon-separated.

To run scripts containing objects with semicolons (for example, function and procedure definitions), use as_single_query=yes.

To upload dumps or to execute other complex scripts, the preferable way is to use the community.postgresql.postgresql_db module with state=restore.

Mutually exclusive with query.

port

aliases: login_port

integer

Database port to connect to.

Default: 5432

positional_args

list / elements=raw

List of values to be passed as positional arguments to the query. When the value is a list, it will be converted to PostgreSQL array.

Mutually exclusive with named_args.

query

string

SQL query to run. Variables can be escaped with psycopg2 syntax http://initd.org/psycopg/docs/usage.html.

search_path

list / elements=string

added in 1.0.0 of community.postgresql

List of schema names to look in.

session_role

string

Switch to session_role after connecting. The specified session_role must be a role that the current login_user is a member of.

Permissions checking for SQL commands is carried out as though the session_role were the one that had logged in originally.

ssl_mode

string

Determines whether or with what priority a secure SSL TCP/IP connection will be negotiated with the server.

See https://www.postgresql.org/docs/current/static/libpq-ssl.html for more information on the modes.

Default of prefer matches libpq default.

Choices:

  • allow

  • disable

  • prefer ← (default)

  • require

  • verify-ca

  • verify-full

trust_input

boolean

added in 0.2.0 of community.postgresql

If no, check whether a value of session_role is potentially dangerous.

It makes sense to use no only when SQL injections via session_role are possible.

Choices:

  • no

  • yes ← (default)

Notes

Note

  • Supports check_mode.

  • The default authentication assumes that you are either logging in as or sudo’ing to the postgres account on the host.

  • To avoid “Peer authentication failed for user postgres” error, use postgres user as a become_user.

  • This module uses psycopg2, a Python PostgreSQL database adapter. You must ensure that psycopg2 is installed on the host before using this module.

  • If the remote host is the PostgreSQL server (which is the default case), then PostgreSQL must also be installed on the remote host.

  • For Ubuntu-based systems, install the postgresql, libpq-dev, and python-psycopg2 packages on the remote host before using this module.

  • The ca_cert parameter requires at least Postgres version 8.4 and psycopg2 version 2.4.3.

See Also

See also

community.postgresql.postgresql_db

The official documentation on the community.postgresql.postgresql_db module.

PostgreSQL Schema reference

Complete reference of the PostgreSQL schema documentation.

Examples

- name: Simple select query to acme db
  community.postgresql.postgresql_query:
    db: acme
    query: SELECT version()

- name: Select query to db acme with positional arguments and non-default credentials
  community.postgresql.postgresql_query:
    db: acme
    login_user: django
    login_password: mysecretpass
    query: SELECT * FROM acme WHERE id = %s AND story = %s
    positional_args:
    - 1
    - test

- name: Select query to test_db with named_args
  community.postgresql.postgresql_query:
    db: test_db
    query: SELECT * FROM test WHERE id = %(id_val)s AND story = %(story_val)s
    named_args:
      id_val: 1
      story_val: test

- name: Insert query to test_table in db test_db
  community.postgresql.postgresql_query:
    db: test_db
    query: INSERT INTO test_table (id, story) VALUES (2, 'my_long_story')

# If your script contains semicolons as parts of separate objects
# like functions, procedures, and so on, use "as_single_query: yes"
- name: Run queries from SQL script using UTF-8 client encoding for session
  community.postgresql.postgresql_query:
    db: test_db
    path_to_script: /var/lib/pgsql/test.sql
    positional_args:
    - 1
    encoding: UTF-8

- name: Example of using autocommit parameter
  community.postgresql.postgresql_query:
    db: test_db
    query: VACUUM
    autocommit: yes

- name: >
    Insert data to the column of array type using positional_args.
    Note that we use quotes here, the same as for passing JSON, etc.
  community.postgresql.postgresql_query:
    query: INSERT INTO test_table (array_column) VALUES (%s)
    positional_args:
    - '{1,2,3}'

# Pass list and string vars as positional_args
- name: Set vars
  ansible.builtin.set_fact:
    my_list:
    - 1
    - 2
    - 3
    my_arr: '{1, 2, 3}'

- name: Select from test table by passing positional_args as arrays
  community.postgresql.postgresql_query:
    query: SELECT * FROM test_array_table WHERE arr_col1 = %s AND arr_col2 = %s
    positional_args:
    - '{{ my_list }}'
    - '{{ my_arr|string }}'

# Select from test table looking into app1 schema first, then,
# if the schema doesn't exist or the table hasn't been found there,
# try to find it in the schema public
- name: Select from test using search_path
  community.postgresql.postgresql_query:
    query: SELECT * FROM test_array_table
    search_path:
    - app1
    - public

# If you use a variable in positional_args / named_args that can
# be undefined and you wish to set it as NULL, the constructions like
# "{{ my_var if (my_var is defined) else none | default(none) }}"
# will not work as expected substituting an empty string instead of NULL.
# If possible, we suggest to use Ansible's DEFAULT_JINJA2_NATIVE configuration
# (https://docs.ansible.com/ansible/latest/reference_appendices/config.html#default-jinja2-native).
# Enabling it fixes this problem. If you cannot enable it, the following workaround
# can be used.
# You should precheck such a value and define it as NULL when undefined.
# For example:
- name: When undefined, set to NULL
  set_fact:
    my_var: NULL
  when: my_var is undefined

# Then:
- name: Insert a value using positional arguments
  community.postgresql.postgresql_query:
    query: INSERT INTO test_table (col1) VALUES (%s)
    positional_args:
    - '{{ my_var }}'

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key

Description

query

string

Executed query.

When reading several queries from a file, it contains only the last one.

Returned: always

Sample: “SELECT * FROM bar”

query_all_results

list / elements=list

List containing results of all queries executed (one sublist for every query). Useful when reading several queries from a file.

Returned: always

Sample: [[{“Column”: “Value1”}, {“Column”: “Value2”}], [{“Column”: “Value1”}, {“Column”: “Value2”}]]

query_list

list / elements=string

List of executed queries. Useful when reading several queries from a file.

Returned: always

Sample: [“SELECT * FROM foo”, “SELECT * FROM bar”]

query_result

list / elements=dictionary

List of dictionaries in column:value form representing returned rows.

When running queries from a file, returns result of the last query.

Returned: always

Sample: [{“Column”: “Value1”}, {“Column”: “Value2”}]

rowcount

integer

Number of produced or affected rows.

When using a script with multiple queries, it contains a total number of produced or affected rows.

Returned: changed

Sample: 5

statusmessage

string

Attribute containing the message returned by the command.

When reading several queries from a file, it contains a message of the last one.

Returned: always

Sample: “INSERT 0 1”

Authors

  • Felix Archambault (@archf)

  • Andrew Klychkov (@Andersson007)

  • Will Rouesnel (@wrouesnel)