tableFind() function
The tableFind() function extracts the first table in a stream of tables whose
group key values match a predicate. If no table is found, the function errors.
Function type: Stream and table
tableFind(fn: (key) => key._field == "fieldName")
Parameters
Make sure fn parameter names match each specified parameter.
To learn why, see Match parameter names.
fn
A predicate function for matching keys in a table’s group key.
tableFind returns the first table that resolves as true.
Expects a key argument that represents a group key in the input stream.
Data type: Function
Example fn function
(key) => key._field == "fieldName"
Example
t = from(bucket:"example-bucket")
|> range(start: -5m)
|> filter(fn:(r) => r._measurement == "cpu")
|> tableFind(fn: (key) => key._field == "usage_idle")
// t represents the first table in a stream whose group key
// contains "_field" with a value of "usage_idle".
You can use t from the example above as input for getColumn()
and getRecord().
Support and feedback
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