Documentation

Query PostgreSQL

To query PostgreSQL with Flux:

  1. Import the sql package.

  2. Use sql.from() and provide the following parameters:

    • driverName: postgres
    • dataSourceName: See data source name
    • query: PSQL query to execute
import "sql"

sql.from(
    driverName: "postgres",
    dataSourceName: "postgresql://username:password@localhost:5432",
    query: "SELECT * FROM example_table",
)

PostgreSQL data source name

The postgres driver uses the following DSN syntax (also known as a connection string):

postgres://username:password@localhost:5432/dbname?param=value

PostgreSQL to Flux data type conversion

sql.from() converts PostgreSQL data types to Flux data types.

PostgreSQL data type Flux data type
INT, BIGINT, SMALLINT, TINYINT, INT2, INT4, INT8, SERIAL2, SERIAL4, SERIAL8 int
FLOAT4, FLOAT8 float
DATE, TIME, TIMESTAMP time
BOOL bool
TEXT string

All other PostgreSQL data types are converted to strings.


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The future of Flux

Flux is going into maintenance mode. You can continue using it as you currently are without any changes to your code.

Flux is going into maintenance mode and will not be supported in InfluxDB 3.0. This was a decision based on the broad demand for SQL and the continued growth and adoption of InfluxQL. We are continuing to support Flux for users in 1.x and 2.x so you can continue using it with no changes to your code. If you are interested in transitioning to InfluxDB 3.0 and want to future-proof your code, we suggest using InfluxQL.

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