into_values() - Tiger Data

Since 1.16.0 This returns the largest values seen by the aggregate and the corresponding values associated with them. Note that Postgres requires an input argument with type matching the associated value in order to determine the response type.

Samples

Find the top 5 values from i * 13 % 10007 for i = 1 to 10000:

SELECT into_values(
    max_n_by(sub.mod, sub.div, 5),
    NULL::INT)
FROM (
  SELECT (i * 13) % 10007 AS mod, (i * 13) / 10007 AS div
  FROM generate_series(1,10000) as i
) sub;

Output:

into_values
-------------
(10006,3)
(10005,7)
(10004,11)
(10003,2)
(10002,6)

Arguments

The syntax is:

into_values(
  agg MaxNBy,
  dummy ANYELEMENT
) TABLE (
  value BIGINT | DOUBLE PRECISION | TIMESTAMPTZ,
  data ANYELEMENT
)

Name	Type	Default	Required	Description
`agg`	MaxNBy	-	✔	The aggregate to return the results from. Note that the exact type here varies based on the type of data stored.
`dummy`	ANYELEMENT	-	✔	This is purely to inform Postgres of the response type. A NULL cast to the appropriate type is typical.

Returns

Column	Type	Description
into_values	SETOF BIGINT \| SETOF DOUBLE PRECISION \| SETOF TIMESTAMPTZ	The highest values seen while creating this aggregate.