B19306_01 閱讀筆記(character set)
Caution: AL32UTF8
is the Oracle Database character set that is appropriate for XMLType data. It is equivalent to the IANA registered standard UTF-8
encoding, which supports all valid XML characters.
Do not confuse Oracle Database database character set UTF8
(no hyphen) with database character set AL32UTF8
or with character encoding UTF-8
. Database character set UTF8
has been superseded by AL32UTF8
. Do not use UTF8
for XML data. UTF8
supports only Unicode version 3.1 and earlier; it does not support all valid XML characters. AL32UTF8
has no such limitation.
Using database character set UTF8
for XML data could potentially cause a fatal error or affect security negatively. If a character that is not supported by the database character set appears in an input-document element name, a replacement character (usually "?") is substituted for it. This will terminate parsing and raise an exception.
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