docs-v2/content/v2.0/reference/flux/stdlib/influxdb-v1/fieldkeys.md

title	description	menu	weight	v2.0/tags	related
v1.fieldKeys() function	The `v1.fieldKeys()` function returns field keys in a bucket.	v2_0_ref name parent v1.fieldKeys InfluxDB v1	301	fields	/v2.0/query-data/flux/explore-schema/ https://docs.influxdata.com/influxdb/latest/query_language/schema_exploration#show-field-keys, SHOW FIELD KEYS in InfluxQL

The v1.fieldKeys() function returns field keys in a bucket. The return value is always a single table with a single column, _value.

import "influxdata/influxdb/v1"

v1.fieldKeys(
  bucket: "example-bucket",
  predicate: (r) => true,
  start: -30d
)

Parameters

bucket

The bucket to list field keys from.

Data type: String

predicate

The predicate function that filters field keys. Defaults to (r) => true.

Data type: Function

start

The oldest time to include in results. Defaults to -30d.

Relative start times are defined using negative durations. Negative durations are relative to now. Absolute start times are defined using timestamps.

Data type: Duration

Examples

import "influxdata/influxdb/v1"

v1.fieldKeys(bucket: "my-bucket")

Function definition

package v1

fieldKeys = (bucket, predicate=(r) => true, start=-30d) =>
  tagValues(bucket: bucket, tag: "_field", predicate: predicate, start: start)

Used functions: v1.tagValues