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);
When evaluating the following query, each element value in the shot1 array is added together. The resulting value is divided by 2.
SELECT ARRAY_SUM(shot1) / 2 FROM seismic_data;
In the following query, ARRAY_SUM adds each element within the specified scope reference of the shot1 array. The query returns a value representing the total sum of adding the affected element values of the shot1 array.
SELECT ARRAY_SUM(shot1, NEW arrayVec(5,5), NEW arrayVec(10,10)) FROM seismic_data;