toBool() function

The toBool() function converts all values in the _value column to booleans.

*Function type: Type conversion*

toBool()

*Supported data types: Float | Integer | String | Uinteger*

To convert values in a column other than _value, define a custom function patterned after the function definition, but replace _value with your desired column.

Examples

from(bucket: "telegraf")
  |> filter(fn:(r) =>
    r._measurement == "mem" and
    r._field == "used"
  )
  |> toBool()

Function definition

toBool = (tables=<-) =>
  tables
    |> map(fn:(r) => ({ r with _value: bool(v: r._value) }))

*Used functions: map(), bool()*