LEAVE 语句停止包含 Label 标识 WHILE、REPEAT、LOOP 或 BEGIN 语句的当前迭代。
忽略对包含语句的循环条件(如果有)的求值,循环停止。
DECLARE i INTEGER; SET i = 1; X : REPEAT ... IF i >= 4 THEN LEAVE X; END IF; SET i = i + 1; UNTIL FALSE END REPEAT;
DECLARE i INTEGER; SET i = 0; X : REPEAT -- Outer loop ... DECLARE j INTEGER; SET j = 0; REPEAT -- Inner loop ... IF i >= 2 AND j = 1 THEN LEAVE X; -- Outer loop left from within inner loop END IF; ... SET j = j + 1; UNTIL j >= 3 END REPEAT; SET i = i + 1; UNTIL i >= 3 END REPEAT X; -- Execution resumes here after the leave