云数据库 GAUSSDB-CREATE TABLE:语法格式

时间：2025-01-10 10:13:11

云数据库 GAUSSDB C

语法格式

创建表。

CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UN LOG GED ] TABLE [ IF NOT EXISTS ] table_name 
    { ( { column_name data_type [ CHARACTER SET | CHARSET charset ] [ compress_mode ] [ COLLATE collation ] [ column_constraint [ ... ] ]
        | table_constraint
        | LIKE source_table [ like_option [...] ] }
        [, ... ] )
    | LIKE source_table }
    [ table_option [ [ , ] ... ] ]
    [ htap_option ]
    [ WITH ( {storage_parameter = value} [, ... ] ) ]
    [ ON COMMIT { PRESERVE ROWS | DELETE ROWS | DROP } ]
    [ ILM ADD POLICY ROW STORE COMPRESS ADVANCED ROW AFTER n { day | month | year } OF NO MODIFICATION [ ON ( EXPR )]]
    [ TABLESPACE tablespace_name ];

其中table_option为：

{ COMMENT [ = ] 'string' |
  AUTO_INCREMENT [ = ] value |
  [ DEFAULT ] CHARACTER SET | CHARSET [ = ] default_charset |
  [ DEFAULT ] COLLATE [ = ] default_collation |
  ENGINE [ = ] { InnoDB | 'InnoDB' | "InnoDB" }}

其中htap_option为：

{ COLVIEW [ PRIORITY { HIGH | LOW | NONE } ] |
  NOCOLVIEW [ PRIORITY { HIGH | LOW | NONE } ]}

其中列约束column_constraint为：

[ CONSTRAINT constraint_name ]
{ NOT NULL |
  NULL |
  CHECK ( expression ) |
  DEFAULT default_expr |
  ON UPDATE update_expr |
  GENERATED ALWAYS AS ( generation_expr ) [STORED] |
  GENERATED [ ALWAYS | BY DEFAULT [ ON NULL ] ] AS IDENTITY [ ( identity_options ) ] |
  AUTO_INCREMENT |
  COMMENT 'string' |
  COLVIEW |
  NOCOLVIEW |
  UNIQUE [KEY] index_parameters |
  PRIMARY KEY index_parameters |
  ENCRYPTED WITH ( COLUMN_ENCRYPTION_KEY = column_encryption_key, ENCRYPTION_TYPE = encryption_type_value ) |
  REFEREN CES  reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ]
      [ ON DELETE action ] [ ON UPDATE action ] }
[ DEFERRABLE | NOT DEFERRABLE | INITIALLY DEFERRED | INITIALLY IMMEDIATE ]

其中列的压缩可选项compress_mode为：

{ DELTA | PREFIX | DICTIONARY | NUMSTR | NOCOMPRESS }

其中表约束table_constraint为：

[ CONSTRAINT [ constraint_name ] ]
{ CHECK ( expression ) |
  UNIQUE [ index_name ] [ USING method ] ( { { column_name [ ( length ) ] | ( expression ) } [ ASC | DESC ] } [, ... ] ) index_parameters |
  PRIMARY KEY [ USING method ] ( { column_name [ ASC | DESC ] } [, ... ] ) index_parameters 
  |
  FOREIGN KEY [ index_name ] ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ]
      [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE action ] [ ON UPDATE action ] }
[ DEFERRABLE | NOT DEFERRABLE | INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
{ [ COMMENT 'string' ] [ ... ] }

其中like选项like_option为：

{ INCLUDING | EXCLUDING } { DEFAULTS | GENERATED | CONSTRAINTS | INDEXES | STORAGE | COMMENTS | PARTITION | RELOPTIONS | UPDATE | IDENTITY | ILM | ALL }

其中索引参数index_parameters为：

[ WITH ( {storage_parameter = value} [, ... ] ) ]
[ USING INDEX TABLESPACE tablespace_name ]

其中update_expr为：

{ CURRENT_TIMESTAMP | LOCALTIMESTAMP | NOW() }

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语法格式

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