Connector Postgres

PostgreSQL often referred to as Postgres, is an object-relational database management system.

Postgres uses and extends the SQL language combined with many features that safely store and scales the most complicated data workloads.

The native data types that are supported include:

Primitives	Integer, Numeric, String, Boolean
Structured	Date/Time, Array, Range, UUID
Document	JSON/JSONB, XML, Key-value (Hstore)
Geometry	Point, Line, Circle, Polygon
Customizations	Composite, Custom Types

Learn more: about Postgres from PostgreSQL tutorials.

The Postgres connector is used to connect and load data from the PostgreSQL database.

Requirements

Credentials of the database you would like to connect to:

Host
Port
Name of the database
Username
Password
SSH key details (optional, described in more detail below)

If you wish to connect to a database outside of the Meiro environment, you may need a front-end tool like PgAdmin4, Postico, DBeaver or any other front-end (GUI) tool available online. To learn more about these tools, please refer to their respective documentation online. Connecting via a GUI tool is not mandatory, but it may be useful if you want to access the database outside the Meiro environment.

Postgres components work only with CSV tables. Other data formats need to be converted to CSV format by processors.

Learn more: about PostgreSQL documentation

Data In/Data Out

Data In	N/A
Data Out	Results will be saved as a CSV table in `out/tables`.

Learn more: about the folder structure here.

Parameters

DB

The following credentials are mandatory:

Host (required)	Name of the server that hosts the database.
Port (required)	The port number you want to access.
Username	Name of database.
Password	Account name.
Database	Account password.

You should be able to get all the credentials from the database administrator.

SSH

To connect to certain databases (e.g. databases in the internal networks or databases behind firewalls), you may need an additional security layer and an SSH Key. After generating the Public and Private keys and sending the Public key to your database administrator, you can connect the database to Meiro.

Enabled (optional)	Checked if SSH required to connect to the database.
Private (optional)	Private key.
Public (optional)	Public key.
SSH Host (optional)	Name of SSH Host.

Table

Name (required)	Name of the table.
Query (required)	A query is a request to access data from a database to manipulate it or retrieve it.
Output Table (required)	The name of the output table you want to load the query.
Enabled (true/false)	Enabled for this table to be pulled from the database.