text: --
  -- Determine the Quantile classifications from a numeric array
  --
  -- @param in_array A numeric array of numbers to determine the best
  --            bins based on the Quantile method.
  --
  -- @param breaks The number of bins you want to find.
  --
  --
  CREATE OR REPLACE FUNCTION @extschema@.CDB_QuantileBins(in_array numeric[], breaks int)
  RETURNS numeric[]
  AS $$
    SELECT
      percentile_disc(Array(SELECT generate_series(1, breaks) / breaks::numeric))
      WITHIN GROUP (ORDER BY x ASC) AS p
    FROM
      unnest(in_array) AS x;
  $$ language SQL IMMUTABLE STRICT PARALLEL SAFE;
  