PostgreSQL Data Connector

PostgreSQL Data Connector Documentation

PostgreSQL is an advanced open-source relational database management system known for its robustness, extensibility, and support for SQL compliance.

The PostgreSQL Server Data Connector enables federated/accelerated SQL queries on data stored in PostgreSQL databases.

datasets:
  - from: postgres:my_table
    name: my_dataset
    params:
      pg_host: localhost
      pg_port: 5432
      pg_db: my_database
      pg_user: my_user
      pg_pass: ${secrets:my_pg_pass}

Configuration

`from`

The from field takes the form postgres:my_table where my_table is the table identifier in the PostgreSQL server to read from.

The fully-qualified table name (database.schema.table) can also be used in the from field.

datasets:
  - from: postgres:my_database.my_schema.my_table
    name: my_dataset
    params: ...

`name`

The dataset name. This will be used as the table name within Spice.

Example:

datasets:
  - from: postgres:my_database.my_schema.my_table
    name: cool_dataset
    params: ...

SELECT COUNT(*) FROM cool_dataset;

+----------+
| count(*) |
+----------+
| 6001215  |
+----------+

`params`

The connection to PostgreSQL can be configured by providing the following params:

Parameter Name	Description
`pg_host`	The hostname of the PostgreSQL server.
`pg_port`	The port of the PostgreSQL server.
`pg_db`	The name of the database to connect to.
`pg_user`	The username to connect with.
`pg_pass`	The password to connect with. Use the secret replacement syntax to load the password from a secret store, e.g. `${secrets:my_pg_pass}`.
`pg_sslmode`	Optional. Specifies the SSL/TLS behavior for the connection, supported values: `verify-full` (default) - requires SSL, valid root certificate, and matching server host name; `verify-ca` - requires TLS and valid root certificate; `require` - requires TLS; `prefer` - tries TLS but connects insecurely if not supported; `disable` - does not use TLS.
`pg_sslrootcert`	Optional parameter specifying the path to a custom PEM certificate that the connector will trust.
`connection_pool_size`	Optional. The maximum number of connections to keep open in the connection pool. Default is 10.

Types

The table below shows the PostgreSQL data types supported, along with the type mapping to Apache Arrow types in Spice.

PostgreSQL Type	Arrow Type
`int2`	`Int16`
`int4`	`Int32`
`int8`	`Int64`
`money`	`Int64`
`float4`	`Float32`
`float8`	`Float64`
`numeric`	`Decimal128`
`text`	`Utf8`
`varchar`	`Utf8`
`bpchar`	`Utf8`
`uuid`	`Utf8`
`bytea`	`Binary`
`bool`	`Boolean`
`json`	`LargeUtf8`
`timestamp`	`Timestamp(Nanosecond, None)`
`timestampz`	`Timestamp(Nanosecond, TimeZone`
`date`	`Date32`
`time`	`Time64(Nanosecond)`
`interval`	`Interval(MonthDayNano)`
`point`	`FixedSizeList(Float64[2])`
`int2[]`	`List(Int16)`
`int4[]`	`List(Int32)`
`int8[]`	`List(Int64)`
`float4[]`	`List(Float32)`
`float8[]`	`List(Float64)`
`text[]`	`List(Utf8)`
`bool[]`	`List(Boolean)`
`bytea[]`	`List(Binary)`
`geometry`	`Binary`
`geography`	`Binary`
`enum`	`Dictionary(Int8, Utf8)`
Composite Types	`Struct`

Examples

Connecting using Username/Password

datasets:
  - from: postgres:my_database.my_schema.my_table
    name: my_dataset
    params:
      pg_host: localhost
      pg_port: 5432
      pg_db: my_database
      pg_user: my_user
      pg_pass: ${secrets:my_pg_pass}

Connect using SSL

datasets:
  - from: postgres:my_database.my_schema.my_table
    name: my_dataset
    params:
      pg_host: localhost
      pg_port: 5432
      pg_db: my_database
      pg_user: my_user
      pg_pass: ${secrets:my_pg_pass}
      pg_sslmode: verify-ca
      pg_sslrootcert: ./custom_cert.pem

Separate dataset/accelerator secrets

Specify different secrets for a PostgreSQL source and acceleration:

datasets:
  - from: postgres:my_schema.my_table
    name: my_dataset
    params:
      pg_host: localhost
      pg_port: 5432
      pg_db: my_database
      pg_user: my_user
      pg_pass: ${secrets:pg1_pass}
    acceleration:
      engine: postgres
      params:
        pg_host: localhost
        pg_port: 5433
        pg_db: acceleration
        pg_user: two_user_two_furious
        pg_pass: ${secrets:pg2_pass}