Syntax extension: do not require PARTITION keyword in partition definition

  create or replace table t1 (x int)

  partition by range(x) (

    partition p1 values less than (10),

    partition p2 values less than (20),

    partition p3 values less than (30),

    partition p4 values less than (40),

    partition p5 values less than (50),

    partition pn values less than maxvalue);

  create or replace table t1 (x int)

  partition by range(x) (

    p1 values less than (10),

    p2 values less than (20),

    p3 values less than (30),

    p4 values less than (40),

    p5 values less than (50),

    pn values less than maxvalue);