I have here an Oracle DataWarehouse and have to execute the following function:

function getUserSelection(
  p_userID in number,
  p_userDate in date,
  p_userCompany in string,
  p_mode in number default null)
return v_c

According to our DB admin v_c should be a cursor.

It does nor work from Java. What I tried:

String sqlQuery = "{ ? = call getUserSelection(?,?,?,?) }";
CallableStatement callStmt = con.prepareCall(sqlQuery);
callStmt.registerOutParameter("v_c", OracleTypes.CURSOR);
callStmt.setInt("p_userID", 123);
callStmt.setDate("p_userData", new java.sql.Date(System.currentTimeMilis()));
callStmt.setUserCompany("p_userCompany", "Kiwi");
callStmt.set("p_mode", 0);
callStmt.execute();

This leads to the error

not supported sql92 token at position 10

Then tried the following:

String sqlQuery = """
   begin ? := getUserSelection(?,?,?,?); end;
""";
    CallableStatement callStmt = con.prepareCall(sqlQuery);
    callStmt.registerOutParameter("v_c", OracleTypes.CURSOR);
    callStmt.setInt("p_userID", 123);
    callStmt.setDate("p_userData", new java.sql.Date(System.currentTimeMilis()));
    callStmt.setUserCompany("p_userCompany", "Kiwi");
    callStmt.set("p_mode", 0);
    callStmt.execute();

and am getting

java.sql.Exception ORA-06550 Row 1 Column 20 PLS-00103 Found symbol '>' while expecting :=.(@%;"

Oracle Function itself works fine, I can execute it from SQL Developer without issues.

Any ideas?