Can't insert UInt128 value

[fisher85]

Describe the bug
An error occurs when trying to insert a value of UInt128 type.

To Reproduce

from clickhouse_driver import connect

with connect(dsn='clickhouse://localhost') as connection:
    with connection.cursor() as cursor:
        cursor.execute('DROP TABLE IF EXISTS test')
        cursor.execute('CREATE TABLE IF NOT EXISTS test (`a` UInt128) ENGINE = MergeTree() ORDER BY (a)')
        data = [
            {'a': 2**127-1},
            {'a': 2**127},
        ]
        cursor.executemany('INSERT INTO test (a) VALUES', data)
        cursor.execute('SELECT * FROM test')
        print(cursor.fetchall())

Throws

Traceback (most recent call last):
  File "/home/xxx/clickhouse.py", line 11, in <module>
    cursor.executemany('INSERT INTO test (a) VALUES', data)
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/dbapi/cursor.py", line 138, in executemany
    response = execute(
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/client.py", line 261, in execute
    rv = self.process_insert_query(
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/client.py", line 478, in process_insert_query
    rv = self.send_data(sample_block, data,
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/client.py", line 531, in send_data
    self.connection.send_data(block)
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/connection.py", line 566, in send_data
    self.block_out.write(block)
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/streams/native.py", line 38, in write
    write_column(self.context, col_name, col_type, items,
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/columns/service.py", line 113, in write_column
    column.write_data(items, buf)
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/columns/base.py", line 77, in write_data
    self._write_data(items, buf)
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/columns/base.py", line 81, in _write_data
    self.write_items(prepared, buf)
  File "/usr/local/lib64/python3.9/site-packages/clickhouse_driver/columns/intcolumn.py", line 115, in write_items
    buf.write(s.pack(*uint_64_pairs))
struct.error: pack expected 4 items for packing (got 8)

Expected behavior
The UInt128 value is expected to be inserted successfully into the table.

If you change the UInt128 type to Int128

from clickhouse_driver import connect

with connect(dsn='clickhouse://localhost') as connection:
    with connection.cursor() as cursor:
        cursor.execute('DROP TABLE IF EXISTS test')
        cursor.execute('CREATE TABLE IF NOT EXISTS test (`a` Int128) ENGINE = MergeTree() ORDER BY (a)')
        data = [
            {'a': 2**127-1},
            {'a': 2**127},
        ]
        cursor.executemany('INSERT INTO test (a) VALUES', data)
        cursor.execute('SELECT * FROM test')
        print(cursor.fetchall())

Everything works well

[(-170141183460469231731687303715884105728,), (170141183460469231731687303715884105727,)]

Versions

• clickhouse-driver 0.2.1
• Python 3.9.6

[xzkostyan]

Fix was merged into master branch.