Documentation

Query SQLite

To query SQLite with Flux:

  1. Import the sql package.

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

    • driverName: sqlite3
    • dataSourceName: See data source name
    • query: SQL query to execute
import "sql"

sql.from(
  driverName: "sqlite3",
  dataSourceName: "file:/path/to/example.db?cache=shared&mode=ro",
  query: "SELECT * FROM example_table"
)

Requires file system access

To query SQLite, Flux must have access to the filesystem. If Flux does not have access to the file system, the query will return an error similar to one of the following:

  • Error: unable to open database file
  • failed to read file: filesystem service is uninitialized
  • An internal error has occurred

If using InfluxDB Cloud or InfluxDB OSS, the Flux process does not have access to the filesystem.


SQLite data source name

The sqlite3 driver uses the following DSN syntax (also known as a connection string):

file:/path/to/example.db?param=value

SQLite to Flux data type conversion

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

SQLite data type Flux data type
INT, INTEGER, BIGINT, SMALLINT, TINYINT int
FLOAT, DOUBLE float
DATETIME, TIMESTAMP, DATE time
BOOL int
TEXT string

All other SQLite data types are converted to strings.


Upgrade to InfluxDB Cloud or InfluxDB 2.0!

InfluxDB Cloud and InfluxDB OSS 2.0 ready for production.