findRecord() function
findRecord()
returns a row at a specified index as a record from the first
table in a stream of tables that matches the specified predicate function.
The function returns an empty record if no table is found or if the index is out of bounds.
Function type signature
(<-tables: stream[B], fn: (key: A) => bool, idx: int) => B where A: Record, B: Record
Parameters
idx
(Required) Index of the record to extract.
fn
(Required) Predicate function to evaluate input table group keys.
findColumn()
uses the first table that resolves as true
.
The predicate function requires a key
argument that represents each input
table’s group key as a record.
tables
Input data. Default is piped-forward data (<-
).
Examples
Extract a row as a record
import "sampledata"
sampledata.int()
|> findRecord(
fn: (key) => key.tag == "t1",
idx: 0,
)// Returns {_time: 2021-01-01T00:00:00.000000000Z, _value: -2, tag: t1}
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