OceanBase CREATE TABLEGROUP

描述

该语句用来创建表组。

说明 
只有租户下的管理员权限才可以创建表组。

格式

CREATE TABLEGROUP [IF NOT EXISTS] tablegroupname [opt_tablegroup_option_list] [opt_tg_partition_option]

opt_tablegroup_option_list:
tablegroup_option [tablegroup_option]

tablegroup_option:
LOCALITY [=] locality_name
| PRIMARY_ZONE [=] primary_zone_name

opt_tg_partition_option:
PARTITION BY 
 KEY COLUMN_NUM [tg_subpartition_option] PARTITIONS INTNUM
| HASH [tg_subpartition_option] PARTITIONS INTNUM
| RANGE [tg_subpartition_option] {PARTITION partition_name VALUES LESS THAN range_partition_expr, ...}
| RANGE COLUMNS COLUMN_NUM [tg_subpartition_option] {PARTITION partition_name VALUES LESS THAN range_partition_expr, ...}
| LIST [tg_subpartition_option] {PARTITION partition_name VALUES in list_partition_expr, ...}
| LIST COLUMNS COLUMN_NUM [tg_subpartition_option] {PARTITION partition_name VALUES in list_partition_expr, ...}

tg_subpartition_option:
SUBPARTITION BY 
 RANGE SUBPARTITION TEMPLATE {SUBPARTITION partition_name VALUES LESS THAN range_partition_expr, ...}
| RANGE COLUMNS COLUMN_NUM SUBPARTITION TEMPLATE {SUBPARTITION partition_name VALUES LESS THAN range_partition_expr, ...}
| HASH [SUBPARTITIONS INTNUM]
| KEY COLUMN_NUM [SUBPARTITIONS INTNUM]
| LIST SUBPARTITION TEMPLATE {SUBPARTITION partition_name VALUES in list_partition_expr, ...}
| LIST COLUMNS COLUMN_NUM SUBPARTITION TEMPLATE {SUBPARTITION partition_name VALUES in list_partition_expr, ...}

参数解释

示例

• 创建名为 myTableGroup1 的表组。

obclient> CREATE TABLEGROUP myTableGroup1;
Query OK, 0 rows affected (0.07 sec)

obclient> create table myt1 (c1 int, c2 int ) tablegroup = myTableGroup1;
Query OK, 0 rows affected (0.28 sec)

obclient> create table myt2 (c1 int, c2 int ) tablegroup = myTableGroup1;
Query OK, 0 rows affected (0.26 sec)

• 创建 hash 分区的表组 tgh，同时创建 hash 分区的表 ttgh，且分区个数相同。

obclient> create tablegroup tgh partition by hash partitions 10;
Query OK, 0 rows affected (0.09 sec)

obclient> create table ttgh(c1 int, c2 int) partition by hash(c1) partitions 10;
Query OK, 0 rows affected (0.55 sec)

obclient> create table ttgh2(c1 int, c2 int) partition by hash(c2) partitions 10;
Query OK, 0 rows affected (0.39 sec)