ApsaraDB for OceanBase:Overview

Syntax

CREATE [table_prefix_options] 
TABLE
[schema_name. ] table_name
[ SHARING = {sharing_options} ]
{table_definition_options}
[ MEMOPTIMIZE FOR READ ][ MEMOPTIMIZE FOR WRITE ][ PARENT [ schema_name. ] table_name ];

• table_definition_options

  { relational_table | object_table | XMLType_table }

  • Creating relational tables is supported. For more information, see Create a relational table.

  • Creating object tables and XML tables (option: object_table or XMLType_table) is not supported. The conversion generates an empty statement.

  Example 1:

  CREATE TYPE 
  	employees_typ AS OBJECT 
  (e_no NUMBER, e_address CHAR(30));
  
  CREATE TABLE 
  	employees_obj_t OF employees_typ 
  (e_no PRIMARY KEY) OBJECT IDENTIFIER IS PRIMARY KEY;
  
  CREATE TABLE 
  	TABLE_TYPE_2 
  (d_no NUMBER, 
   mgr_ref REF employees_typ SCOPE IS employees_obj_t);

  Example 2:

  CREATE TABLE TABLE_TYPE_3 OF XMLTYPE;
  
  CREATE TABLE 
  	TABLE_TYPE_4 OF XMLTYPE 
  XMLSCHEMA "http://www.example.com/xwarehouses.xsd" ELEMENT "Warehouse";
  
  CREATE TABLE 
  	TABLE_TYPE_5 
  (C1 NUMBER,C2 XMLTYPE) 
  XMLTYPE SPEC STORE AS CLOB 
  (TABLESPACE EXAMPLE STORAGE (INITIAL 6144) CHUNK 4000 NOCACHE LOGGING);

• The table_prefix_options option is not supported. This option will be ignored. Sample code:

   [ { GLOBAL | PRIVATE } TEMPORARY | SHARDED | DUPLICATED | [ IMMUTABLE ] BLOCKCHAIN 
   | IMMUTABLE  ] 

• The sharing_options option is not supported. This option will be ignored. Sample code:

  { METADATA | DATA | EXTENDED DATA | NONE }

• The MEMOPTIMIZE FOR READ option is not supported. This option will be ignored. Sample code:

  CREATE TABLE MEMO_1 (C NUMBER) MEMOPTIMIZE FOR READ;

• The MEMOPTIMIZE FOR WRITE option is not supported. This option will be ignored. Sample code:

  CREATE TABLE MEMO_2 (C NUMBER) MEMOPTIMIZE FOR WRITE;

• The PARENT [ schema_name. ] table option is not supported. This option will be ignored. Sample code:

  CREATE SHARDED TABLE PARENT_1 (C NUMBER) PARENT PARENT_F;