Oracle9i SQL Reference Release 2 (9.2) Part Number A96540-01 |
|
Functions, 34 of 177
decompose::=
DECOMPOSE
is valid only for Unicode characters. DECOMPOSE
takes as its argument a string in any datatype and returns a Unicode string after decomposition in the same character set as the input. For example, an o-umlaut codepoint will be returned as the "o" codepoint followed by an umlaut codepoint.
string
can be any of the datatypes CHAR
, VARCHAR2
, NCHAR
, NVARCHAR2
, CLOB
, or NCLOB
.CANONICAL
causes canonical decomposition, which allows recomposition (for example, with the COMPOSE
function) to the original string. This is the default.COMPATIBILITY
causes decomposition in compatibility mode. In this mode, recomposition is not possible. This mode is useful, for example, when decomposing half-width and full-width katakana characters, where recomposition might not be desirable without external formatting or style information.
See Also:
Oracle9i Database Concepts for information on Unicode character sets and character semantics |
The following example decomposes the string "Châteaux" into its component codepoints:
SELECT DECOMPOSE ('Châteaux') FROM DUAL; DECOMPOSE --------- Cha^teaux
|
![]() Copyright © 1996, 2002 Oracle Corporation. All Rights Reserved. |
|