Increment show case.

this is just for anyone who is interested to check out mu tweak on UPSERT to support atomic INCREASE

A few usage show case :

        CREATE TABLE test_table 
	(row varchar not null, col_int integer, col_long bigint, col_long2 bigint
	CONSTRAINT pk PRIMARY KEY (row));

        // increase on existing row.
	UPSERT INTO test_table(row, col_int, col_long, col_long2) VALUES('row1', 1, 1, 1);
	UPSERT INTO test_table(row, col_long, col_long2) INCREASE VALUES('row1', -100, 1000);

        // increase on non existing row.
	UPSERT INTO test_table(row, col_long, col_long2) INCREASE VALUES('row2', 100, 1000);