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Oracle® Database SQL Language Reference
12c Release 1 (12.1)

E17209-15
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DECOMPOSE

Syntax

Description of decompose.gif follows
Description of the illustration decompose.gif

Purpose

DECOMPOSE is valid only for Unicode characters. DECOMPOSE takes as its argument a string in any data type and returns a Unicode string after decomposition in the same character set as the input. For example, an o-umlaut code point will be returned as the "o" code point followed by an umlaut code point.

CLOB and NCLOB values are supported through implicit conversion. If char is a character LOB value, then it is converted to a VARCHAR value before the COMPOSE operation. The operation will fail if the size of the LOB value exceeds the supported length of the VARCHAR in the particular development environment.

See Also:

Examples

The following example decomposes the string "Châteaux" into its component code points:

SELECT DECOMPOSE ('Châteaux')
  FROM DUAL; 

DECOMPOSE
---------
Cha^teaux

Note:

The results of this example can vary depending on the character set of your operating system.