如何使用UCanAccess在两列上创建具有唯一约束的表？

Question

How to write sql query to create table with unique constraint on 2 columns using jdbc: I try this code and give me "SQLException: Invalid create statement!":

 Connection conn = ConnectDB.getConnection();
    Statement stmt = null;
    try {
            String sql = "CREATE TABLE TBL_fonts" +
                    + "(char_id int not NULL, "
                    + "FW VARCHAR(255), "
                    + "code VARCHAR(255), "
                    + "character VARCHAR(255), "
                    + "CONSTRAINT fontConst UNIQUE(FW,code), "
                    + "PRIMARY KEY (char_id))";
            stmt = conn.createStatement();
            stmt.executeUpdate(sql);
        conn.commit();
    } catch (SQLException ex) {
        ex.printStackTrace();
    }

Answer 1

This issue has been fixed in UCanAccess 2.0.6.2. The code

String sql = 
        "CREATE TABLE TBL_fonts ("
        + "char_id int not NULL, "
        + "FW VARCHAR(255), "
        + "code VARCHAR(255), "
        + "character VARCHAR(255), "
        + "CONSTRAINT fontConst UNIQUE(FW,code), "
        + "PRIMARY KEY (char_id)"
        + ")";
Statement stmt = conn.createStatement();
stmt.executeUpdate(sql);

now works as expected.