Consider the following 2-D ARRAY data type and table.
CREATE TYPE shot_ary AS INTEGER ARRAY[1:50][1:50]; CREATE TABLE seismic_data ( id INTEGER, shot1 shot_ary, shot2 shot_ary);
In the following query, ARRAY_COUNT_DISTINCT returns the number of elements whose value is equal to 100 within the specified scope of the shot1 array.
SELECT ARRAY_COUNT_DISTINCT(shot1, NEW arrayVec(5,5), NEW arrayVec(10,10), 100) FROM seismic_data;