例外情况是：java.sql.SQLSyntaxErrorException：ORA-00936：缺少表达式

Question

通过Java代码从sql数据库中选择数据。

String sql="SELECT [IRB#] AS IRB_NUMBER, [RefNum] AS STUDY_PK FROM CyberProtocol1 WHERE   VelosRequestID = '"+currentRequest+"' AND TranscationStatus = 1";
    ResultSet resultSet=executeQuery(sql);

   public ResultSet executeQuery(String SQLString) {
    logDebugInfo("In executeQuery() function",LOG_TYPE_INFORMATIVE);
    ResultSet sqlResultSet = null;
    try {
        logDebugInfo("SQLString:: " + SQLString,LOG_TYPE_CRITICAL);
        executeStatement=gConn.prepareStatement(SQLString);
        sqlResultSet=executeStatement.executeQuery();
        return sqlResultSet;
    } catch (Exception errorException) {
        processException(errorException, false);
    }
    return sqlResultSet;
}

得到异常是：java.sql.SQLSyntaxErrorException：ORA-00936：缺少表达式