java - DB2 jdbc SQL Error: SQLCODE=-302, SQLSTATE=22001 on Select -

there select query executing db2 jdbc. using prepared statement pass in value parameter. column length of parameter in database 12 works fine until length of value 12 , fails. throws exception error message in title. did searching , found explanation in following link http://www-01.ibm.com/support/docview.wss?uid=swg21319477 , resolution mentioned in there below

resolving problem add additional client side validation code prevents queries, values larger allowed maximum length ran.

i don't want this. why wouldn't query return no results. idea how go this?

edit

string sql = "select student_id, student_name student student_id = ?";  try (connection connection = dbutils.getconnection) {     try (preparedstatement statement = connection.preparestatement(sql))     {         statement.setstring(1, student_id);          resultset result = statement.executequery();          while (result.next())         {             //...         }     } } 

i going answer question:

why wouldn't query return no results. idea how go this?

computer programs including database management systems use errors , warnings indicate went wrong, used in wrong way or situations possible conflicts or "danger" encountered. in case trying call defined api value not fit. program refuses accept value , points out wrong call returning error code.

if return no results, how know api call, usage, wrong? know , can fix it. or using exception handling ignore , move on...