MySQL 8.4 Release Notes
12.9.4 The ucs2 Character Set (UCS-2 Unicode Encoding)
Note
The ucs2
character set is deprecated; expect it to be removed in a future MySQL release. You should use utf8mb4
instead.
In UCS-2, every character is represented by a 2-byte Unicode code with the most significant byte first. For example: LATIN CAPITAL LETTER A
has the code 0x0041
and it is stored as a 2-byte sequence: 0x00 0x41
. CYRILLIC SMALL LETTER YERU
(Unicode 0x044B
) is stored as a 2-byte sequence: 0x04 0x4B
. For Unicode characters and their codes, please refer to the Unicode Consortium website.
The ucs2
character set has these characteristics:
-
Supports BMP characters only (no support for supplementary characters)
-
Uses a fixed-length 16-bit encoding and requires two bytes per character.