Adaptive Server 15.0 supports the vaiable-length unitext datatype.
The variable-length unitext datatype can hold up to 1,073,741,823 Unicode characters (2,147,483,646 bytes). You can use unitext anywhere you use the text datatype, with the same semantics. unitext columns are stored in UTF-16 encoding, regardless of the Adaptive Server default character set.
Large Unicode character data. Together with unichar and univarchar datatypes, Adaptive Server provides complete Unicode datatype support, which is best for incremental multilingual applications.
unitext stores data in UTF-16, which is the native encoding datatype for Windows and Java environments.
See the System Administration Guide.