16.20 - Expected Mode - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples

Teradata Database
Teradata Vantage NewSQL Engine
Release Number
March 2019
Content Type
Programming Reference
Publication ID
English (United States)
Last Update

Provide reasonable default widths for a character data type and client form-of-use. The expected export width multiplier for this case is 3 with an adjustment of 2.

In Expected mode, Teradata Database multiplies Unicode characters by 2 to calculate the number of bytes required to export Unicode strings to KanjiSJIS_0S because n Unicode characters translate to 2*n bytes in KanjiSJIS_0S.

For another example, suppose you want to export Unicode characters to KanjiEBCDIC5035_0I in Expected mode. In this case, Teradata Database multiplies the Unicode strings by 2 to determine the number of bytes to export, and, if the client is a mainframe, adds an additional 2 bytes to account for the Shift Out and Shift In characters needed for KanjiEBCDIC5035_0I to express any double byte characters if the client is a mainframe. This is because n Unicode characters are expected to take 2*n +2 bytes in KanjiEBCDIC5035_0I.