New XML Type Instances | XML Data Type | Teradata Vantage - 17.10 - New XML Type Instances - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - XML Data Type

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1140-171K
Language
English (United States)
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.