New XML Type Instances - Teradata Vantage NewSQL Engine - 16.20

Teradata Vantageā„¢ XML Data Type

prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1140-162K
You can construct XML type instances using the following:
  • The NEW operator
  • The CREATEXML function
  • The XMLPARSE function

The following example uses the NEW operator to construct an XML type instance from the text representation of the XML document in the customerText.customerXMLText column.

If the XML is loaded in its text representation into a VARCHAR or CLOB column named customerXMLText in the customerText table, it can be used to construct XML type instances:

SELECT customerID, (NEW XML(customerXMLText)).XMLEXTRACT('/Customer/Address', NULL)
FROM customerText;

Query result:

customerID  NEW XML(customerXMLText).XMLEXTRACT('/Customer/Address', Null)
--------------------------------------------------------------------------
         1  <Address>100 1st Street, San Francisco, CA 94118</Address>

The following example uses the CREATEXML function to construct an XML type instance from the text representation of the XML document in the customerText.customerXMLText column:

SELECT customerID, (CREATEXML(customerXMLText)).XMLEXTRACT('/Customer/Address', NULL)
FROM customerText;

Query result:

customerID  CREATEXML(customerXMLText).XMLEXTRACT('/Customer/Address', Null)
----------------------------------------------------------------------------
         1  <Address>100 1st Street, San Francisco, CA 94118</Address>

The customerText.customerXMLText column can be of VARCHAR, CLOB, or BLOB type.

XML type instances are also generated by other operations such as casts and invocation of methods and functions that return results as XML type values.