pggeodb.nancy.inra.fr/db_robot - db_robot on pggeodb.nancy.inra.fr

Function: st_range4ma

Schema

public

Owner

albenard

Descriptions

There is no description for function st_range4ma

Options

Definition

CREATE OR REPLACE FUNCTION public.st_range4ma (
 matrix double precision [],
 nodatamode text,
 variadic args text []
)
RETURNS double precision AS
$span$
   DECLARE
       _matrix float[][];
       min float;
       max float;
   BEGIN
       _matrix := matrix;
       min := 'Infinity'::float;
       max := '-Infinity'::float;
       FOR x in array_lower(matrix, 1)..array_upper(matrix, 1) LOOP
           FOR y in array_lower(matrix, 2)..array_upper(matrix, 2) LOOP
               IF _matrix[x][y] IS NULL THEN
                   IF NOT nodatamode = 'ignore' THEN
                       _matrix[x][y] := nodatamode::float;
                   END IF;
               END IF;
               IF min > _matrix[x][y] THEN
                   min = _matrix[x][y];
               END IF;
               IF max < _matrix[x][y] THEN
                   max = _matrix[x][y];
               END IF;
           END LOOP;
       END LOOP;
       IF max = '-Infinity'::float OR min = 'Infinity'::float THEN
           RETURN NULL;
       END IF;
       RETURN max - min;
   END;
$span$
LANGUAGE 'plpgsql'
IMMUTABLE
CALLED ON NULL INPUT
SECURITY INVOKER
COST 100;

This file was generated with SQL Manager for PostgreSQL (www.pgsqlmanager.com) at 26/02/2014 11:51