Fw: how to resolve org.postgresql.util.PSQLException: ERROR:operator does not exist: text = integer?

Hi,

This is a continuation of my last problem - not sure if I should write from there cos the first part was solved with the help from this group.

I was trying to get the matching tutor_id with the parameter values which is in this case subject_names from a table which contains both the tutor_id and the subject_names.

Here's the error message:

org.postgresql.util.PSQLException: ERROR: operator does not exist: text = integer

  Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts.

  Position: 69

    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2433)

    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2178)

    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:306)

    at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:441)

    at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:365)

    at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:155)

    at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:118)

    at Controller.searchController.doPost(searchController.java:108)

Here's the code snippet which I do not know where I had gone wrong:

            String sql1 = "select tutor_id, subject_name from tutor_subject where subject_name in ("

                    + builder.deleteCharAt(builder.length() - 1).toString() + ")";

            PreparedStatement ps2 = connection.prepareStatement(sql1);

HashMap<Integer, ArrayList<String>> tutorSubject = new HashMap<Integer, ArrayList<String>>();           

for(String item : subjs) {

            int tutor_id = tutor.getTutor_id();

            ps2.setInt(1, tutor_id);           

            if (item != null) {

                subjs.add(item);

            ps2.setString(2, item);   

            }                         

            ps2.executeQuery();

        while (rs.next()) {

                    tutor_id = rs.getInt("tutor_id"); 

                    subjs.add(rs.getString("subject_name"));

                                           

                        tutorSubject.put(tutor_id, subjs);   

                        System.out.println(tutorSubject);

                        }

           

            System.out.println("tutor ID=" + rs.getInt("tutor_id") + ", subjectName=" + rs.getString("subject_name"));

Hope someone could point out my mistake.

Thanks.