odbtools/odbctest/mql/basic/27concat2/10calss.mql

create class if not exists /test/concat2 (
		
		v_varchar		varchar,
		v_timestamp 	timestamp,
		v_date			date,
		
		indexes(v_varchar, v_timestamp, v_date),
		keys(v_varchar)

	) with ckeys=v_date asc
;