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104 lines
2.8 KiB
ReStructuredText
104 lines
2.8 KiB
ReStructuredText
.. meta::
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:description: Hasura PG dump API reference
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:keywords: hasura, docs, PG dump API, API reference
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.. _pg_dump_api_reference:
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PG Dump API Reference
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=====================
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.. contents:: Table of contents
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:backlinks: none
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:depth: 1
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:local:
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Introduction
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------------
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The PG Dump API is an admin-only endpoint that can be used to execute ``pg_dump`` on the
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Postgres instance that Hasura is configured with.
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The primary motive of this API is to provide convenience methods to initialise migrations from an
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existing Hasura instance. But the functionality can be later expanded to do other things
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such as taking a data dump etc.
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Endpoint
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--------
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All requests are ``POST`` requests to the ``/v1alpha1/pg_dump`` endpoint.
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API Spec
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--------
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Request
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^^^^^^^
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.. code-block:: http
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POST /v1alpha1/pg_dump HTTP/1.1
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Content-Type: application/json
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X-Hasura-Role: admin
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{
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"opts": ["-O", "-x", "--schema-only", "--schema", "public"],
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"clean_output": true
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}
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- ``opts``: Arguments to be passed to the ``pg_dump`` tool. Represented as array
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of strings. The underlying command that is executed is:
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.. code-block:: bash
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pg_dump $DATABASE_URL $OPTS -f $FILENAME
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- ``clean_output``: When this optional argument is set to ``true``, the output SQL from
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the command is cleaned to remove the following:
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- SQL front matter, like SET statements.
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- ``CREATE SCHEMA public``.
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- ``COMMENT ON SCHEMA public is 'standard public schema'``;
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- Comments (``--``) and empty newlines.
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- Postgres triggers created by Hasura for event triggers.
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Sample response
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^^^^^^^^^^^^^^^
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.. code-block:: http
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HTTP/1.1 200 OK
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Content-Type: application/sql
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SET check_function_bodies = false;
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CREATE TABLE public.author (
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id integer NOT NULL,
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name text NOT NULL
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);
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CREATE SEQUENCE public.author_id_seq
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AS integer
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START WITH 1
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INCREMENT BY 1
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NO MINVALUE
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NO MAXVALUE
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CACHE 1;
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ALTER SEQUENCE public.author_id_seq OWNED BY public.author.id;
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ALTER TABLE ONLY public.author ALTER COLUMN id SET DEFAULT nextval('public.author_id_seq'::regclass);
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Disabling PG Dump API
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---------------------
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Since this API can be used to dump all the Postgres data and schema, it can be
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disabled, especially in production deployments.
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The ``enabled-apis`` flag or the ``HASURA_GRAPHQL_ENABLED_APIS`` env var can be used to
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enable/disable this API. By default, The PG DumpAPI is enabled. To disable it, you need to explicitly
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state that this API is not enabled. i.e. remove it from the list of enabled APIs.
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.. code-block:: bash
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# enable only graphql & metadata apis, disable pgdump
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--enabled-apis="graphql,metadata"
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HASURA_GRAPHQL_ENABLED_APIS="graphql,metadata"
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See :ref:`server_flag_reference` for info on setting the above flag/env var.
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