Postgres

tap-postgres (meltanolabs variant)🥇

PostgreSQL database extractor

The tap-postgres extractor pulls data from Postgres that can then be sent to a destination using a loader.

Alternate Implementations

Getting Started

Prerequisites

If you haven't already, follow the initial steps of the Getting Started guide:

  1. Install Meltano
  2. Create your Meltano project

Installation and configuration

  1. Add the tap-postgres extractor to your project using 
    meltano add
     : 
    2. meltano add extractor tap-postgres
  2. Configure the tap-postgres settings using 
    meltano config
     : 
    3. meltano config tap-postgres set --interactive
  3. Test that extractor settings are valid using 
    meltano config
     : 
    4. meltano config tap-postgres test

Next steps

If you run into any issues, learn how to get help.

Capabilities

The current capabilities for tap-postgres may have been automatically set when originally added to the Hub. Please review the capabilities when using this extractor. If you find they are out of date, please consider updating them by making a pull request to the YAML file that defines the capabilities for this extractor.

This plugin has the following capabilities:

  • about
  • batch
  • catalog
  • discover
  • schema-flattening
  • state
  • stream-maps

You can override these capabilities or specify additional ones in your meltano.yml by adding the capabilities key.

Settings

The tap-postgres settings that are known to Meltano are documented below. To quickly find the setting you're looking for, click on any setting name from the list:

You can also list these settings using 

meltano config
with the list subcommand: 

meltano config tap-postgres list

You can override these settings or specify additional ones in your meltano.yml by adding the settings key.

Please consider adding any settings you have defined locally to this definition on MeltanoHub by making a pull request to the YAML file that defines the settings for this plugin.

Database (database)

  • Environment variable: TAP_POSTGRES_DATABASE

Database name. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set database [value]

Dates As String (dates_as_string)

  • Environment variable: TAP_POSTGRES_DATES_AS_STRING
  • Default Value: false

Defaults to false, if true, date, and timestamp fields will be Strings. If you see ValueError: Year is out of range, try setting this to True.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set dates_as_string [value]

Default Replication Method (default_replication_method)

  • Environment variable: TAP_POSTGRES_DEFAULT_REPLICATION_METHOD
  • Default Value: FULL_TABLE

Replication method to use if there is not a catalog entry to override this choice. One of FULL_TABLE, INCREMENTAL, or LOG_BASED.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set default_replication_method [value]

Filter Schemas (filter_schemas)

  • Environment variable: TAP_POSTGRES_FILTER_SCHEMAS

If an array of schema names is provided, the tap will only process the specified Postgres schemas and ignore others. If left blank, the tap automatically determines ALL available Postgres schemas.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set filter_schemas [value]

Host (host)

  • Environment variable: TAP_POSTGRES_HOST

Hostname for postgres instance. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set host [value]

Json As Object (json_as_object)

  • Environment variable: TAP_POSTGRES_JSON_AS_OBJECT
  • Default Value: false

Defaults to false, if true, json and jsonb fields will be Objects.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set json_as_object [value]

Max Record Count (max_record_count)

  • Environment variable: TAP_POSTGRES_MAX_RECORD_COUNT

Optional. The maximum number of records to return in a single stream.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set max_record_count [value]

Password (password)

  • Environment variable: TAP_POSTGRES_PASSWORD

Password used to authenticate. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set password [value]

Port (port)

  • Environment variable: TAP_POSTGRES_PORT
  • Default Value: 5432

The port on which postgres is awaiting connection. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set port [value]

SQLAlchemy URL (sqlalchemy_url)

  • Environment variable: TAP_POSTGRES_SQLALCHEMY_URL

Example postgresql://[username]:[password]@localhost:5432/[db_name]


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set sqlalchemy_url [value]

SSH Tunnel Enable (ssh_tunnel.enable)

  • Environment variable: TAP_POSTGRES_SSH_TUNNEL_ENABLE
  • Default Value: false

Enable an ssh tunnel (also known as bastion server), see the other ssh_tunnel.* properties for more details


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssh_tunnel enable [value]

SSH Tunnel Host (ssh_tunnel.host)

  • Environment variable: TAP_POSTGRES_SSH_TUNNEL_HOST

Host of the bastion server, this is the host we'll connect to via ssh


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssh_tunnel host [value]

SSH Tunnel Port (ssh_tunnel.port)

  • Environment variable: TAP_POSTGRES_SSH_TUNNEL_PORT
  • Default Value: 22

Port to connect to bastion server


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssh_tunnel port [value]

SSH Tunnel Private Key (ssh_tunnel.private_key)

  • Environment variable: TAP_POSTGRES_SSH_TUNNEL_PRIVATE_KEY

Private Key for authentication to the bastion server


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssh_tunnel private_key [value]

SSH Tunnel Private Key Password (ssh_tunnel.private_key_password)

  • Environment variable: TAP_POSTGRES_SSH_TUNNEL_PRIVATE_KEY_PASSWORD

Private Key Password, leave None if no password is set


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssh_tunnel private_key_password [value]

SSH Tunnel Username (ssh_tunnel.username)

  • Environment variable: TAP_POSTGRES_SSH_TUNNEL_USERNAME

Username to connect to bastion server


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssh_tunnel username [value]

SSL Certificate Authority (ssl_certificate_authority)

  • Environment variable: TAP_POSTGRES_SSL_CERTIFICATE_AUTHORITY
  • Default Value: ~/.postgresql/root.crl

The certificate authority that should be used to verify the server's identity. Can be provided either as the certificate itself (in .env) or as a filepath to the certificate. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssl_certificate_authority [value]

SSL Client Certificate (ssl_client_certificate)

  • Environment variable: TAP_POSTGRES_SSL_CLIENT_CERTIFICATE
  • Default Value: ~/.postgresql/postgresql.crt

The certificate that should be used to verify your identity to the server. Can be provided either as the certificate itself (in .env) or as a filepath to the certificate. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssl_client_certificate [value]

SSL Client Certificate Enable (ssl_client_certificate_enable)

  • Environment variable: TAP_POSTGRES_SSL_CLIENT_CERTIFICATE_ENABLE
  • Default Value: false

Whether or not to provide client-side certificates as a method of authentication to the server. Use ssl_client_certificate and ssl_client_private_key for further customization. To use SSL to verify the server's identity, use ssl_enable instead. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssl_client_certificate_enable [value]

SSL Client Private Key (ssl_client_private_key)

  • Environment variable: TAP_POSTGRES_SSL_CLIENT_PRIVATE_KEY
  • Default Value: ~/.postgresql/postgresql.key

The private key for the certificate you provided. Can be provided either as the certificate itself (in .env) or as a filepath to the certificate. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssl_client_private_key [value]

SSL Enable (ssl_enable)

  • Environment variable: TAP_POSTGRES_SSL_ENABLE
  • Default Value: false

Whether or not to use ssl to verify the server's identity. Use ssl_certificate_authority and ssl_mode for further customization. To use a client certificate to authenticate yourself to the server, use ssl_client_certificate_enable instead. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssl_enable [value]

SSL Mode (ssl_mode)

  • Environment variable: TAP_POSTGRES_SSL_MODE
  • Default Value: verify-full

SSL Protection method, see postgres documentation for more information. Must be one of disable, allow, prefer, require, verify-ca, or verify-full. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssl_mode [value]

SSL Storage Directory (ssl_storage_directory)

  • Environment variable: TAP_POSTGRES_SSL_STORAGE_DIRECTORY
  • Default Value: .secrets

The folder in which to store SSL certificates provided as raw values. When a certificate/key is provided as a raw value instead of as a filepath, it must be written to a file before it can be used. This configuration option determines where that file is created.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set ssl_storage_directory [value]

User (user)

  • Environment variable: TAP_POSTGRES_USER

User name used to authenticate. Note if sqlalchemy_url is set this will be ignored.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set user [value]
Expand To Show SDK Settings

Batch Compression Format (batch_config.encoding.compression)

  • Environment variable: TAP_POSTGRES_BATCH_CONFIG_ENCODING_COMPRESSION

Compression format to use for batch files.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set batch_config encoding.compression [value]

Batch Encoding Format (batch_config.encoding.format)

  • Environment variable: TAP_POSTGRES_BATCH_CONFIG_ENCODING_FORMAT

Format to use for batch files.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set batch_config encoding.format [value]

Batch Storage Prefix (batch_config.storage.prefix)

  • Environment variable: TAP_POSTGRES_BATCH_CONFIG_STORAGE_PREFIX

Prefix to use when writing batch files.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set batch_config storage.prefix [value]

Batch Storage Root (batch_config.storage.root)

  • Environment variable: TAP_POSTGRES_BATCH_CONFIG_STORAGE_ROOT

Root path to use when writing batch files.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set batch_config storage.root [value]

Faker Locale (faker_config.locale)

  • Environment variable: TAP_POSTGRES_FAKER_CONFIG_LOCALE

One or more LCID locale strings to produce localized output for: https://faker.readthedocs.io/en/master/#localization


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set faker_config locale [value]

Faker Seed (faker_config.seed)

  • Environment variable: TAP_POSTGRES_FAKER_CONFIG_SEED

Value to seed the Faker generator for deterministic output: https://faker.readthedocs.io/en/master/#seeding-the-generator


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set faker_config seed [value]

Enable Schema Flattening (flattening_enabled)

  • Environment variable: TAP_POSTGRES_FLATTENING_ENABLED

'True' to enable schema flattening and automatically expand nested properties.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set flattening_enabled [value]

Max Flattening Depth (flattening_max_depth)

  • Environment variable: TAP_POSTGRES_FLATTENING_MAX_DEPTH

The max depth to flatten schemas.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set flattening_max_depth [value]

User Stream Map Configuration (stream_map_config)

  • Environment variable: TAP_POSTGRES_STREAM_MAP_CONFIG

User-defined config values to be used within map expressions.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set stream_map_config [value]

Stream Maps (stream_maps)

  • Environment variable: TAP_POSTGRES_STREAM_MAPS

Config object for stream maps capability. For more information check out Stream Maps.


Configure this setting directly using the following Meltano command:

meltano config tap-postgres set stream_maps [value]

Incremental Replication

- name: tap-postgres
  variant: meltanolabs
  pip_url: git+https://github.com/MeltanoLabs/tap-postgres.git
  config:
    sqlalchemy_url: postgresql://meltano_user:password@localhost:5432/my_postgres_db
  select:
  - <my_schema>-<my_table>.*
  metadata:
    <my_schema>-<my_table>:
      replication-method: INCREMENTAL
      replication_key: key
      key_properties:
      - key

See the replication docs for more details.

Something missing?

This page is generated from a YAML file that you can contribute changes to.

Edit it on GitHub!

Looking for help?

If you're having trouble getting the tap-postgres extractor to work, look for an existing issue in its repository, file a new issue, or join the Meltano Slack community and ask for help in the 
#plugins-general
channel.

Install

meltano add extractor tap-postgres

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Repo

https://github.com/MeltanoLabs/tap-postgres
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