An alternate way of executing long running DDL is to disable DDL replication and then to execute the DDL statement separately on each node. That can still be done using a single SQL statement, as shown in the example below. Note that global locking rules still apply, so be careful not to...
SQL> select owner, table_name, constraint_name, constraint_type from user_constraints where table_name='EMP'; 查看创建主键的SQL SELECT DBMS_METADATA.GET_DDL('CONSTRAINT','EMP_PK') FROM DUAL; 查看创建外键的SQL SQL> SELECT DBMS_METADATA.GET_DDL('REF_CONSTRAINT','EMP_FK_DEPT') FROM DUAL; ...
This is largely in part because MySQL is open source, meaning that anyone can access it for free, it is easy to use, and is widely compatible. The primary languages that are used by MySQL are C and C++. Prior to the release of MySQL, most companies just used plain SQL. Within SQL ...
exec DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'CONSTRAINTS',false); PL/SQL procedure successfully completed. SQL> exec DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'STORAGE',false); PL/SQL procedure successfully completed. SQL> SQL> select dbms_metadata.ge...
Techopedia Explains Data Definition Language The present database industry incorporates DDL into any formal language describing data. However, it is considered to be a subset of SQL (Structured Query Language). SQL often uses imperative verbs with normal English such as sentences to implement database...
SQL Server SQL Server Database Engine Index , Registry information is corrupt or missing. Make sure the provider installed and registered correctly. [SQLSTATE 08001] .MDF file is growing daily by 1-2 GB, How to fix it 'Could not allocate space for object 'dbo.SORT temporary run storage' ...
AUTHIDproperty values are exposed in the static data dictionary view*_PROCEDURES. For units for whichAUTHIDhas meaning, the view shows the valueCURRENT_USERorDEFINER; for other units, the view showsNULL. For stored PL/SQL units that you create or alter with the following statements, you can ...
Transaction Control: DDL commands often implicitly commit the transactions in most DBMS, meaning changes are auto-saved. DML operations can be rolled back or committed explicitly, giving more control over transaction management. 11 Usage in Database Operations: DDL is primarily used during the setup...
Todeploy(meaning activate) DDL replication for a given replication set, run: --Deploy any set_configs with given set_name:SELECTpgl_ddl_deploy.deploy(set_name);--Deploy only a single set_config_id:SELECTpgl_ddl_deploy.deploy(set_config_id); ...
| [`tidb_enable_fast_create_table`](/system-variables.md#tidb_enable_fast_create_table-new-in-v800) | Modified | Changes the default value from `OFF` to `ON` after further tests, meaning that the [accelerated table creation](/accelerated-table-creation.md) feature is enabled by default....