Details
Major Description
Derby incorrectly throws an Exception when streaming to a BLOB in case the used InputStream actually could provide more data than I want to write to the BLOB field.
PreparedStatement statement = connection.prepareStatement( "insert into FOO(ID,DATA) values(?, ?)" );
statement.setLong( 1, someValue );
statement.setBinaryStream( 2, someInputStream, amountOfData ); // amountOfData < amount of data readable from someInputStream
statement.executeUpdate();
executeUpdate() throws an SQLException with detail message: "Input stream held less data than requested length.: java.io.IOException"
In my case this was first caused by writing an internal buffer (byte[]) to the data base through a ByteArrayInputStream while not limiting the ByteArrayInputStream to the useful data within the buffer but setting amountOfData to the number of useful bytes. So the 2 problems are:
1. the error text is definitly incorrect since I provide more data than neccessary, not less
2. in my opinion this shouldn't throw an exception at all (I checked against 4 other DBMS, all of them worked as intended)