INT_VALUE
:匹配整数类型常量,如 123
。DECIMAL_VALUE
:匹配定点类型常量,如123.456
。STR_VALUE
:匹配字符串常量,如 abc
。NULL
:匹配 NULL 常量。STORAGE_SIZE
:匹配存储长度常量,整数形式默认单位为字节,字符串形式可指定单位为M或G,如1024
或'500M'
。const_value:
INT_VALUE
| DECIMAL_VALUE
| STR_VALUE
| NULL
| STORAGE_SIZE
STORAGE_SIZE:
INT_VALUE
| 'INT_VALUE[M|G]'
charset:
default_charset
| column_charset
default_charset:
[DEFAULT] {CHARSET | CHARACTER SET} [=] {UTF8 | UTF8MB4 | BINARY}
column_charset:
{CHARSET | CHARACTER SET} {UTF8 | UTF8MB4 | BINARY}
collate:
default_collate
| column_collate
default_collate:
[DEFAULT] COLLATE [=] {UTF8MB4_GENERAL_CI | UTF8MB4_BIN | BINARY}
column_collate:
COLLATE {UTF8MB4_GENERAL_CI | UTF8MB4_BIN | BINARY}
data_type:
TINYINT[(precision)] [UNSIGNED] [ZEROFILL]
| SMALLINT[(precision)] [UNSIGNED] [ZEROFILL]
| MEDIUMINT[(precision)] [UNSIGNED] [ZEROFILL]
| INT[(precision)] [UNSIGNED] [ZEROFILL]
| INTEGER[(precision)] [UNSIGNED] [ZEROFILL]
| BIGINT[(precision)] [UNSIGNED] [ZEROFILL]
| FLOAT[(precision, scale)] [UNSIGNED] [ZEROFILL]
| DOUBLE[(precision, scale)] [UNSIGNED] [ZEROFILL]
| DECIMAL[(precision [, scale])] [UNSIGNED] [ZEROFILL]
| NUMERIC[(precision [, scale])] [UNSIGNED] [ZEROFILL]
| DATETIME[(scale)]
| TIMESTAMP[(scale)]
| DATE
| TIME[(scale)]
| YEAR
| VARCHAR(length) column_charset column_collate
| VARBINARY(length)
| CHAR[(length)] column_charset column_collate
| BINARY[(length)]
| TINYTEXT column_charset column_collate
| TINYLOB
| TEXT[(length)] column_charset column_collate
| BLOB[(length)]
| MEDIUMTEXT column_charset column_collate
| MEDIUMBLOB
| LONGTEXT column_charset column_collate
| LONGBLOB
precision | scale | length:
INT_VALUE
tenant_name | pool_name | unit_name | zone_name | region_name:
STR_VALUE
database_name | table_name | table_alias_name | column_name| column_alias_name | partition_name | subpartition_name:
STR_VALUE
index_name | view_name | object_name | constraint_name | tablegroup_name:
STR_VALUE
outline_name | user_name:
STR_VALUE
table_factor:
[[database_name].] table_name
column_factor:
[table_factor.] column_name
expression:
const_value
| column_factor
| operator_expression
| function_expression
comment:
COMMENT 'comment_text'
comment_text:
STR_VALUE
PRIMARY_ZONE
:指定数据的主副本分布策略。primary_zone:
PRIMARY_ZONE [=] zone_name
ZONE_LIST
:指定租户的资源分布策略。zone_list:
ZONE_LIST [=] (zone_name [, zone_name ...])
REPLICA_NUM
:指定数据的副本份数。replica_num:
REPLICA_NUM [=] INT_VALUE
TABLEGROUP
:指定多份数据的主副本分布策略。tablegroup:
default_tablegroup
| table_tablegroup
default_tablegroup:
DEFAULT TABLEGROUP [=] {tablegroup_name | NULL}
table_tablegroup:
TABLEGROUP [=] {tablegroup_name | NULL}
BLOCK_SIZE
:指定对象存储的微块长度。block_size:
BLOCK_SIZE [=] INT_VALUE
COMPRESSION
:指定对象存储的压缩算法。compression:
COMPRESSION [=] {NONE | LZ4_1.0 | LZ0_1.0 | SNAPPY_1.0 | ZLIB_1.0}
PCTFREE
:指定对象存储的宏块预留百分比。pctfree:
PCTFREE [=] INT_VALUE
TABLET_SIZE
:指定并行合并时单个任务的最小分片。tablet_size:
TABLET_SIZE [=] INT_VALUE
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