Release v0.3.0

This is a feature release with enhancements and breaking changes. It's NOT recommended to upgrade if you feel comfortable with 0.2.x. If your work relies on non-JDBC APIs, you may want to wait until we're done with the refactoring in 0.4.0.

• BREAKING CHANGES

  • dropped JDK 7 support
  • removed Guava dependency - please use long/BigInteger to deal with UInt64 instead of UnsignedLong

• NEW FEATURES

  • JDBC 4.2 support

  • add connection setting client_name for load-balancing and troubleshooting

  • add writeBytes & writeUUIDArray and remove UnsignedLong related methods in ClickHouseRowBinaryStream

  • support more data types: IPv4, IPv6, Int128, UInt128, Int256, UInt256, Decimal256, DateTime*, and Map

  • support ORC/Parquet streaming

  • support read/write Bitmap from/into AggregateFunction(groupBitmap, UInt[8-64]) column

    Examples...

    // use JDBC interface - NOT recommended before 0.3.1
    try (PreparedStatement statement = connection.prepareStatement("insert into my_bitmap_table values(..., ?, ...)")) {
        ...
        // RoaringBitmap bitmap = RoaringBitmap.bitmapOf(1,2,3,...);
        s.setObject(index++, ClickHouseBitmap.wrap(bitmap, ClickHouseDataType.UInt32));
        ...
        // the actual SQL in 0.3.0 will be something like, which is also why batch insertion does not work...
        // insert into my_bitmap_table values(..., bitmapBuild([toUInt32(1),toUInt32(3),toUInt32(3),...]) ...)
        s.execute();
    }
    
    // use extended API - recommended in 0.3.0
    try (ClickHouseStatement statement = connection.createStatement()) {
        statement.sendRowBinaryStream("insert into my_bitmap_table", new ClickHouseStreamCallback() {
            public void writeTo(ClickHouseRowBinaryStream stream) throws IOException {
                ...
                // RoaringBitmap bitmap = RoaringBitmap.bitmapOf(1,2,3,...);
                // In addition to RoaringBitmap, you can pass:
                // ImmutableRoaringBitmap, MutableRoaringBitmap and even Roaring64NavigableMap
                stream.writeBitmap(ClickHouseBitmap.wrap(bitmap, ClickHouseDataType.UInt32));
                ...
            }
        });
    }

• BUG FIXES

  • fix error when using ClickHouseCompression.none against 19.16
  • fix NegativeArraySizeException when dealing with large array
  • fix datetime/date display issue caused by timezone differences(between client and column/server)
  • throw SQLException instead of RuntimeException when instantiating ClickHouseConnectionImpl

• MISC

  • 19.14-lts and 20.3-lts are no longer supported so they're removed from regression list