Validating() validates the XMLType contents against an XML schema. ExistsNode() checks whether a certain node exists in the XMLType. Here are some of the important SQL/XML operators: Extract() extracts a subset of the nodes contained in the XMLType. Using the well-known XPath notation, the SQL/XML operators traverse XML structures to find the node or nodes on which they should use the SQL operations. These operators follow the emerging SQL/XML standard. The methods also support several operators that enable you to access and manipulate XML data as part of a regular SQL statement. You can use these methods to perform common database operations, such as checking for the existence of a node and extracting a node. SQL> DESC sales_catalog_table Name Null Type -SALES_NUM NUMBER(18) SALES_ORDER XMLTYPE SQL> The XMLType data type comes with a set of XML-specific methods, which you use to work with XMLType objects.
Here s an example of using the XMLType data type: SQL> CREATE TABLE sales_catalog_table 2 (sales_num number(18), 3 sales_order xmltype) Table created. You can now store a well-formed XML document in the database as an XML test using the CLOB base data type. You can use the XMLType data type just as you would the usual data types in an Oracle database. XMLType and XDBURIType, which is another built-in type for XML data, enable you to leave the XML parsing, storage, and retrieval to the Oracle database.
Oracle uses a special native data type called XMLType to store and manage XML data in a relational table. This minimizes the impact on your existing code, and can significantly reduce the overhead that comes with managed code, especially the overhead for metadata and JIT compilation. To avoid unnecessary overhead, you should retain the native compilation model for all existing source files and add new files that are compiled to managed code. I do not recommend setting /clr or /clr:pure at the project level. To turn on the /Zi switch, open the project properties dialog, select the property Configuration Properties C/C++ General Debug Information Format, and set it to Program Database (/Zi). Neither in managed nor native debug sessions.
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