Documentation

Query CockroachDB

To query CockroachDB 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:26257/cluster_name.defaultdb?sslmode=verify-full&sslrootcert=certs_dir/cc-ca.crt",
    query: "SELECT * FROM example_table",
)

CockroachDB data source name

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

postgres://username:password@localhost:26257/cluster_name.defaultdb?sslmode=verify-full&sslrootcert=certs_dir/cc-ca.crt

The postgres driver use the Go pq implementation to interact with CockroachDB.

CockroachDB to Flux data type conversion

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

CockroachDB data typeFlux data type
INT, BIGINT, SMALLINT, TINYINT, INT2, INT4, INT8, SERIAL2, SERIAL4, SERIAL8int
FLOAT4, FLOAT8float
DATE, TIME, TIMESTAMPtime
BOOLbool
TEXTstring

All other CockroachDB data types are converted to strings.


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