"Invalid data conversion" in DB2 with prepared statements and batch - database

Question

I am using JDBC to create a temporary table, add records to it (with prepared statement and batch) and then transfer everything to another table:
String createTemporaryTable = "declare global temporary table temp_table (RECORD smallint,RANDOM_INTEGER integer,RANDOM_FLOAT float,RANDOM_STRING varchar(600)) ON COMMIT PRESERVE ROWS in TEMP";
statement.execute(createTemporaryTable);
String sql = "INSERT INTO session.temp_table (RECORD,RANDOM_INTEGER,RANDOM_FLOAT,RANDOM_STRING) VALUES (?,?,?,?)";
PreparedStatement preparedStatement = connection.prepareStatement(sql);
float f = 0.7401298f;
Integer integer = 123456789;
String string = "This is a string that will be inserted into the table over and over again.";
// add however many random records you want to the temporary table
int numberOfRecordsToInsert = 35000;
for (int i = 0; i < numberOfRecordsToInsert; i++) {
preparedStatement.setInt(1, i);
preparedStatement.setInt(2, integer);
preparedStatement.setFloat(3, (float) f);
preparedStatement.setString(4, string);
preparedStatement.addBatch();
}
preparedStatement.executeBatch();
// transfer everything from the temporary table just created to the main table
String transferFromTempTableToMain = "insert into main_table select * from session.temp_table";
statement.execute(transferFromTempTableToMain);
This works fine up to about 30000 records in this example. However, if I were to insert say 35000 records I get the following error:
Invalid data conversion: Requested conversion would result in a loss
of precision of 32768. ERRORCODE=-4461, SQLSTATE=42815

Answer 1

The problem is that field RECORD is a smallint. A smallint is a signed 16 bit integer with a range of -32768 to 32767.
So inserting an int value of 32768 is not allowed as it won't fit. You need to declare record as INTEGER instead.