ALTER XSROBJECT statement
This statement is used to either enable or disable the decomposition support for a specific XML schema. Annotated XML schemas can be used to decompose XML documents into relational tables, if decomposition has been enabled for those XML schemas.
The ALTER XSROBJECT statement can be embedded in an application program or issued through the use of dynamic SQL statements. It is an executable statement that can be dynamically prepared only if the DYNAMICRULES run behavior is in effect for the package (SQLSTATE 42509).
One of the following authorities is required:
- ALTERIN on the SQL schema
- Ownership of the XSR object to be altered
- Identifies the XSR object to be altered. The xsrobject-name, including the implicit or explicit schema qualifier, must uniquely identify an existing XSR object at the current server. If no XSR object with this identifier exists, an error is returned (SQLSTATE 42704).
- ENABLE DECOMPOSITION or DISABLE DECOMPOSITION
- Enables or disables the use of the XSR object for decomposition. The identified XSR object must be an XML schema (SQLSTATE 42809). In order to enable decomposition, the XML schema needs to be annotated with decomposition rules (SQLSTATE 225DE) and the objects referenced by the decomposition rules must exist at the current server (SQLSTATE 42704).
- When decomposition for an XSR object is disabled, all related catalog entries are removed.
- Decomposition support for an XSR object will be disabled if any objects the XSR object depends on (such as tables) are dropped or altered to become incompatible with the XSR object.
- In a partitioned database environment, you can issue this statement by connecting to any partition.