15.00 - EMPTY_CLOB - Teradata Database

Teradata Database SQL Functions, Operators, Expressions, and Predicates

Product
Teradata Database
Release Number
15.00
Content Type
Programming Reference
Publication ID
B035-1145-015K
Language
English (United States)

EMPTY_CLOB

Purpose  

Returns an empty CLOB (Character Large Object), that is, one that contains 0 bytes.

Syntax  

where:

 

Syntax element …

Specifies …

TD_SYSFNLIB

the name of the database where the function is located.

ANSI Compliance

This is a Teradata extension to the ANSI SQL:2011 standard.

Invocation

EMPTY_CLOB is an embedded services system function. For information on activating and invoking embedded services functions, see “Embedded Services System Functions” on page 24.

Argument Types

EMPTY_CLOB takes zero input arguments.

Result Type

EMPTY_CLOB is a scalar function whose return value data type is CLOB AS LOCATOR in the LATIN character set.

Example  

The following query:

UPDATE student SET essay = EMPTY_CLOB();

updates the essay column with an empty CLOB.