Howto get UNICODE_FSS data from Table.

Dear all,

Situation:

Firebird 1.5.1 Database with
1. default character set : ISO8859-1

JCA-JDBC 1.5.3 Driver

CREATE DOMAIN "CHN_NAME" AS VARCHAR(50) CHARACTER SET UNICODE_FSS DEFAULT '' NOT NULL;
CREATE DOMAIN "ENG_NAME" AS VARCHAR(100) DEFAULT '' NOT NULL;

CREATE TABLE "SYSUSER" (
"ENG_NAME" ENG_NAME,
"CHN_NAME" CHN_NAME
);

Question:

When i use the following query to get the details from the table though the jdbc drive then an error is occured.

Query:
SELECT * FROM SYSUER where CHN_NAME like '%我%'
Error:
GDS Exception. 335544321. arithmetic exception, numeric overflow, or string truncation
Cannot transliterate character between character sets

Any one can help me??
Thank you very much.

Jeff
2004-10-11