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DROP TABLE IF EXISTS raster_pixelofvalue;
CREATE TABLE raster_pixelofvalue (
rast raster
);
CREATE OR REPLACE FUNCTION make_test_raster()
RETURNS void
AS $$
DECLARE
width int := 10;
height int := 10;
x int;
y int;
rast raster;
BEGIN
rast := ST_MakeEmptyRaster(width, height, 0, 0, 1, -1, 0, 0, 0);
rast := ST_AddBand(rast, 1, '32BUI', 0, 0);
FOR x IN 1..width LOOP
FOR y IN 1..height LOOP
IF (x + y) % 2 = 1 THEN
rast := ST_SetValue(rast, 1, x, y, x + y);
END IF;
END LOOP;
END LOOP;
INSERT INTO raster_pixelofvalue VALUES (rast);
RETURN;
END;
$$ LANGUAGE 'plpgsql';
SELECT make_test_raster();
DROP FUNCTION make_test_raster();
SELECT
(pixval).*
FROM (
SELECT
ST_PixelOfValue(
rast, 1,
ARRAY[3, 11]
) AS pixval
FROM raster_pixelofvalue
) foo;
SELECT
(pixval).*
FROM (
SELECT
ST_PixelOfValue(
rast, 1,
ARRAY[5]
) AS pixval
FROM raster_pixelofvalue
) foo;
SELECT
(pixval).*
FROM (
SELECT
ST_PixelOfValue(
rast,
ARRAY[0]
) AS pixval
FROM raster_pixelofvalue
) foo;
SELECT
(pixval).*
FROM (
SELECT
ST_PixelOfValue(
rast,
ARRAY[0],
FALSE
) AS pixval
FROM raster_pixelofvalue
) foo;
SELECT
(pixval).*
FROM (
SELECT
ST_PixelOfValue(
rast, 1,
7
) AS pixval
FROM raster_pixelofvalue
) foo;
SELECT
(pixval).*
FROM (
SELECT
ST_PixelOfValue(
rast,
2
) AS pixval
FROM raster_pixelofvalue
) foo;
SELECT
(pixval).*
FROM (
SELECT
ST_PixelOfValue(
rast,
0,
FALSE
) AS pixval
FROM raster_pixelofvalue
) foo;
DROP TABLE IF EXISTS raster_pixelofvalue;
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