questdb · amunra · Nov 28, 2025 · Nov 27, 2025 · Nov 27, 2025 · Nov 27, 2025
diff --git a/.bumpversion.toml b/.bumpversion.toml
@@ -1,5 +1,5 @@
 [tool.bumpversion]
-current_version = "4.0.0"
+current_version = "4.1.0"
 commit = false
 tag = false
 

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
@@ -5,6 +5,136 @@ Changelog
 
 =========
 
+4.1.0 (2025-11-28)
+------------------
+
+Features
+~~~~~~~~
+
+Decimal Data Type Support
+*************************
+
+This release adds support for ingesting data into QuestDB's native
+``DECIMAL(precision, scale)`` column type introduced in QuestDB 9.2.0.
+Use decimals when you need exact-precision values (e.g. prices, balances)
+without floating-point rounding issues.
+
+Decimal values can be sent using Python ``decimal.Decimal`` objects in both
+``row()`` and ``dataframe()`` methods. When sending dataframes, you can also use
+PyArrow decimal types for better performance.
+
+Sending decimals requires protocol version 3. When using HTTP, this protocol
+version is auto-negotiated. For TCP connections, you must explicitly specify
+``protocol_version=3`` in the configuration string:
+
+.. code-block:: python
+
+    # HTTP - protocol version 3 is auto-negotiated
+    conf = 'http::addr=localhost:9000;'
+
+    # TCP - must specify protocol_version=3 explicitly
+    conf = 'tcp::addr=localhost:9009;protocol_version=3;'
+
+.. important::
+    **Server Requirement**: This feature requires QuestDB server version 9.2.0 or higher.
+
+    Unlike other column types, DECIMAL columns **must be created in advance** via SQL
+    before ingesting data. Auto-creation is not supported for DECIMAL columns.
+
+    For details on creating DECIMAL columns and working with this data type, see the
+    `QuestDB Decimal documentation <https://questdb.com/docs/concept/decimal/>`_.
+
+**Usage with Python Decimal objects:**
+
+.. code-block:: python
+
+    from decimal import Decimal
+    from questdb.ingress import Sender, TimestampNanos
+
+    # First, create the table with DECIMAL column via SQL:
+    # CREATE TABLE trades (
+    #     symbol SYMBOL,
+    #     price DECIMAL(18,4),
+    #     amount DECIMAL(18,8),
+    #     timestamp TIMESTAMP
+    # ) TIMESTAMP(timestamp);
+
+    conf = 'http::addr=localhost:9000;'
+    with Sender.from_conf(conf) as sender:
+        sender.row(
+            'trades',
+            symbols={'symbol': 'ETH-USD'},
+            columns={
+                'price': Decimal('2615.5400'),
+                'amount': Decimal('0.00044000')},
+            at=TimestampNanos.now())
+
+**Usage with Python Decimal objects in Pandas dataframes:**
+
+.. code-block:: python
+
+    import pandas as pd
+    from decimal import Decimal
+
+    # Create DataFrame with Python Decimal objects
+    df = pd.DataFrame({
+        'symbol': ['ETH-USD', 'BTC-USD'],
+        'price': [Decimal('2615.5400'), Decimal('43210.1234')],
+        'volume': [Decimal('1234.56789012'), Decimal('98.76543210')]
+    })
+
+    with Sender.from_conf(conf) as sender:
+        sender.dataframe(
+            df, 
+            table_name='trades',
+            symbols='symbol',
+            at=TimestampNanos.now())
+
+**Usage with PyArrow Decimal types in Pandas dataframes:**
+
+.. code-block:: python
+
+    import pandas as pd
+    import pyarrow as pa
+    from decimal import Decimal
+
+    # Create DataFrame with Arrow decimal types
+    df = pd.DataFrame({
+        'prices': pd.array(
+            [Decimal('-99999.99'), Decimal('-678.00')],
+            dtype=pd.ArrowDtype(pa.decimal128(18, 2))
+        )
+    })
+
+    with Sender.from_conf(conf) as sender:
+        sender.dataframe(df, table_name='prices', at=TimestampNanos.now())
+
+Additional Arrow Data Type Support
+**********************************
+
+Added support for additional PyArrow column types commonly encountered when
+deserializing from Parquet files or converting Polars dataframes to Pandas:
+
+* ``int16``, ``int32``, ``float32`` (float), ``bool``
+* ``string``, ``large_string`` (including as symbol types)
+* ``timestamp[us]`` with timezone support for microsecond-precision timestamps
+
+Microsecond Timestamp Precision
+*******************************
+
+Microsecond-precision timestamp columns (``datetime64[us]`` in NumPy and
+``timestamp[us]`` in PyArrow) are now fully supported. When using
+``protocol_version`` 2 or higher, microsecond timestamps are sent with full
+precision, including for the designated timestamp column.
+
+Bug fixes
+~~~~~~~~~
+
+* Updated type hints to allow ``None`` as a valid column value in
+  ``Sender.row()``. This brings the type annotations in line with the actual
+  behavior, where ``None`` values have always been supported to represent NULL
+  values.
+
 4.0.0 (2025-10-17)
 ------------------
 

diff --git a/README.rst b/README.rst
@@ -2,10 +2,10 @@
 QuestDB Client Library for Python
 =================================
 
-This is the official Python client library for `QuestDB <https://questdb.io>`_.
+This is the official Python client library for `QuestDB <https://questdb.com>`_.
 
 This client library implements QuestDB's variant of the
-`InfluxDB Line Protocol <https://questdb.io/docs/reference/api/ilp/overview/>`_
+`InfluxDB Line Protocol <https://questdb.com/docs/reference/api/ilp/overview/>`_
 (ILP) over HTTP and TCP.
 
 ILP provides the fastest way to insert data into QuestDB.
@@ -18,7 +18,7 @@ and full-connection encryption with
 Install
 =======
 
-The latest version of the library is 4.0.0 (`changelog <https://py-questdb-client.readthedocs.io/en/latest/changelog.html>`_).
+The latest version of the library is 4.1.0 (`changelog <https://py-questdb-client.readthedocs.io/en/latest/changelog.html>`_).
 
 ::
 
@@ -27,7 +27,7 @@ The latest version of the library is 4.0.0 (`changelog <https://py-questdb-clien
 Quickstart
 ==========
 
-Start by `setting up QuestDB <https://questdb.io/docs/quick-start/>`_ .
+Start by `setting up QuestDB <https://questdb.com/docs/quick-start/>`_ .
 Once set up, you can use this library to insert data.
 
 The most common way to insert data is from a Pandas dataframe.
@@ -98,7 +98,7 @@ guide.
 Links
 =====
 
-* `Core database documentation <https://questdb.io/docs/>`_
+* `Core database documentation <https://questdb.com/docs/>`_
 
 * `Python library documentation <https://py-questdb-client.readthedocs.io/>`_
 
@@ -109,10 +109,10 @@ Links
 Community
 =========
 
-Stop by our `Community Forum <https://community.questdb.io>`_ to 
+Stop by our `Community Forum <https://community.questdb.com>`_ to 
 chat with the QuestDB team.
 
-You can also `sign up to our mailing list <https://questdb.io/contributors/>`_
+You can also `sign up to our mailing list <https://questdb.com/contributors/>`_
 to get notified of new releases.
 
 

diff --git a/docs/changelog.rst b/docs/changelog.rst
@@ -1 +1,12 @@
+.. _changelog:
+
+=========
+Changelog
+=========
+
+.. contents::
+   :local:
+   :depth: 1
+
 .. include:: ../CHANGELOG.rst
+   :start-line: 7
diff --git a/docs/community.rst b/docs/community.rst
@@ -33,7 +33,7 @@ Chat to us
 ==========
 
 If you want to engage with us to discuss your changes or if you need help,
-there's a `#contributors` channel on our `slack <http://slack.questdb.io>`_ server
+there's a `#contributors` channel on our `slack <http://slack.questdb.com>`_ server
 just for that.
 
 Asking for help
@@ -46,4 +46,4 @@ We monitor the `questdb` tag and will get back to you.
 Stack overflow helps us to keep track of the questions and answers, and it helps
 other users who might have the same question.
 
-Alternatively, you can ask on our `slack <http://slack.questdb.io>`_ server.
+Alternatively, you can ask on our `slack <http://slack.questdb.com>`_ server.
diff --git a/docs/conf.py b/docs/conf.py
@@ -28,7 +28,7 @@
 year = '2024'
 author = 'QuestDB'
 copyright = '{0}, {1}'.format(year, author)
-version = release = '4.0.0'
+version = release = '4.1.0'
 
 github_repo_url = 'https://github.com/questdb/py-questdb-client'
 

diff --git a/docs/conf.rst b/docs/conf.rst
@@ -72,8 +72,8 @@ Authentication
 ==============
 
 If you're using QuestDB enterprise you can read up on creating and permissioning
-users in the `Enterprise quickstart <https://questdb.io/docs/guides/enterprise-quick-start/#4-ingest-data-influxdb-line-protocol>`_
-and the `role-based access control <https://questdb.io/docs/operations/rbac/>`_ guides.
+users in the `Enterprise quickstart <https://questdb.com/docs/guides/enterprise-quick-start/#4-ingest-data-influxdb-line-protocol>`_
+and the `role-based access control <https://questdb.com/docs/operations/rbac/>`_ guides.
 
 HTTP Bearer Token
 -----------------
@@ -106,7 +106,7 @@ TLS
 
 TLS in enabled by selecting the ``tcps`` or ``https`` protocol.
 
-See the `QuestDB enterprise TLS documentation <https://questdb.io/docs/operations/tls/>`_
+See the `QuestDB enterprise TLS documentation <https://questdb.com/docs/operations/tls/>`_
 on how to enable this feature in the server.
 
 Open source QuestDB does not offer TLS support out of the box, but you can
@@ -154,7 +154,7 @@ For more details on using self-signed test certificates, see:
 
 * For Open Source QuestDB: https://github.com/questdb/c-questdb-client/blob/main/tls_certs/README.md#self-signed-certificates
 
-* For QuestDB Enterprise: https://questdb.io/docs/operations/tls/#demo-certificates
+* For QuestDB Enterprise: https://questdb.com/docs/operations/tls/#demo-certificates
 
 .. _sender_conf_auto_flush:
 
@@ -239,6 +239,8 @@ Valid options are:
 
 * ``2`` - Array support and binary format serialization for 64-bit floats (version specific to QuestDB).
 
+* ``3`` - Decimal type support (requires QuestDB 9.2.0+). Also includes all features from version 2.
+
 * ``auto`` (default) - Automatic version selection based on protocol type.
 
   HTTP/HTTPS: Auto-detects server capability during handshake (supports version negotiation)
@@ -247,6 +249,9 @@ Valid options are:
 
 .. note::
     Protocol version ``2`` requires QuestDB server version 9.0.0 or higher.
+
+    Protocol version ``3`` requires QuestDB server version 9.2.0 or higher and
+    is needed for ingesting data into ``DECIMAL`` columns.
 
 .. _sender_conf_buffer:
 

diff --git a/docs/examples.rst b/docs/examples.rst
@@ -109,3 +109,44 @@ name.
 
 For details on all options, see the
 :func:`Buffer.dataframe <questdb.ingress.Buffer.dataframe>` method.
+
+
+Decimal Types (QuestDB 9.2.0+)
+------------------------------
+
+The following example shows how to insert data with decimal precision using
+Python's :class:`decimal.Decimal` type.
+
+Requires QuestDB server 9.2.0+ and :ref:`protocol version 3 <sender_conf_protocol_version>`
+(must be :ref:`configured explicitly for TCP/TCPS <sender_conf_protocol_version>`).
+``DECIMAL`` columns must be :ref:`pre-created <sender_auto_creation>` (auto-creation not supported).
+See the :ref:`troubleshooting guide <troubleshooting-flushing>` for common errors.
+
+First, create the table with ``DECIMAL`` columns:
+
+.. code-block:: sql
+
+    CREATE TABLE financial_data (
+        symbol SYMBOL,
+        price DECIMAL(18, 6),
+        quantity DECIMAL(12, 4),
+        timestamp TIMESTAMP_NS
+    ) TIMESTAMP(timestamp) PARTITION BY DAY;
+
+Then insert data using Python decimals:
+
+.. literalinclude:: ../examples/decimal.py
+   :language: python
+
+For better performance with DataFrames, use PyArrow decimal types:
+
+.. literalinclude:: ../examples/decimal_arrow.py
+   :language: python
+
+.. note::
+
+    For HTTP/HTTPS, protocol version 3 is auto-negotiated.
+    For TCP/TCPS, explicitly configure: ``tcp::addr=localhost:9009;protocol_version=3;``
+
+For more details, see the
+`QuestDB DECIMAL documentation <https://questdb.com/docs/reference/sql/datatypes/#decimal>`_.
diff --git a/docs/index.rst b/docs/index.rst
@@ -1,5 +1,5 @@
 .. image:: logo.svg
-    :target: https://questdb.io/
+    :target: https://questdb.com/
     :alt: QuestDB
     :width: 400px
 
@@ -9,7 +9,7 @@ Contents
 ========
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 1
 
    installation
    sender