KEY-RANGE

语法

创建一个或多个KEY-RANGE分区表，其中每个分区可能有一个或一个以上的子分区。

CREATE TABLE [ schema. ]table_name
 table_definition
   PARTITION BY [LINEAR] KEY (column_list)
   SUBPARTITION BY RANGE {(expr) | COLUMNS(column_list)}
   (partition_definition [, partition_definition] ...);

其中，partition_definition为：

PARTITION partition_name
    (subpartition_definition [, subpartition_definition] ...)

subpartition_definition为：

SUBPARTITION subpartition_name
   VALUES LESS THAN {value | value_list | MAXVALUE}

使用示例

KEY-RANGE类型的使用示例

CREATE TABLE tbl_key_range
(
    col1 INT,
    col2 INT,
    col3 varchar(20),
    col4 DATE
)
PARTITION BY KEY(col1)
    SUBPARTITION BY RANGE COLUMNS(col4)
(
  PARTITION  p0(
    SUBPARTITION p0_q1_2023 VALUES LESS THAN('2023-04-01'),
    SUBPARTITION p0_q2_2023 VALUES LESS THAN('2023-07-01'),
    SUBPARTITION p0_q3_2023 VALUES LESS THAN('2023-10-01'),
    SUBPARTITION p0_q4_2023 VALUES LESS THAN('2024-01-01')
  ),
  PARTITION  p1(
    SUBPARTITION p1_q1_2023 VALUES LESS THAN('2023-04-01'),
    SUBPARTITION p1_q2_2023 VALUES LESS THAN('2023-07-01'),
    SUBPARTITION p1_q3_2023 VALUES LESS THAN('2023-10-01'),
    SUBPARTITION p1_q4_2023 VALUES LESS THAN('2024-01-01')
    ),
  PARTITION  p2(
    SUBPARTITION p2_q1_2023 VALUES LESS THAN('2023-04-01'),
    SUBPARTITION p2_q2_2023 VALUES LESS THAN('2023-07-01'),
    SUBPARTITION p2_q3_2023 VALUES LESS THAN('2023-10-01'),
    SUBPARTITION p2_q4_2023 VALUES LESS THAN('2024-01-01')
  )
);