Removed all sqlalchemy related stuff

Author: jprakash-db

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Release History
 
+# 4.0.0 
+
+- Split the connector into two separate packages: `databricks-sql-connector` and `databricks-sqlalchemy`. The `databricks-sql-connector` package contains the core functionality of the connector, while the `databricks-sqlalchemy` package contains the SQLAlchemy dialect for the connector. 
+- Pyarrow dependency is now optional in `databricks-sql-connector`. Users needing arrow are supposed to explicitly install pyarrow 
+
 # 3.6.0 (2024-10-25)
 
 - Support encryption headers in the cloud fetch request (https://github.com/databricks/databricks-sql-python/pull/460 by @jackyhu-db)

README.md

@@ -22,7 +22,12 @@ For the latest documentation, see
 
 ## Quickstart
 
-Install the library with `pip install databricks-sql-connector[pyarrow]`
+### Installing the core library
+Install using `pip install databricks-sql-connector`
+
+### Installing the core library with PyArrow
+Install using `pip install databricks-sql-connector[pyarrow]`
+
 
 ```bash
 export DATABRICKS_HOST=********.databricks.com
@@ -60,6 +65,18 @@ or to a Databricks Runtime interactive cluster (e.g. /sql/protocolv1/o/123456789
 > to authenticate the target Databricks user account and needs to open the browser for authentication. So it 
 > can only run on the user's machine.
 
+## SQLAlchemy
+Starting from `databricks-sql-connector` version 4.0.0 SQLAlchemy support has been extracted to a new library `databricks-sqlalchemy`.
+
+- Github repository [databricks-sqlalchemy github](https://github.com/databricks/databricks-sqlalchemy)
+- PyPI [databricks-sqlalchemy pypi](https://pypi.org/project/databricks-sqlalchemy/)
+
+### Quick SQLAlchemy guide
+Users can now choose between using the SQLAlchemy v1 or SQLAlchemy v2 dialects with the connector core
+
+- Install the latest SQLAlchemy v1 using `pip install databricks-sqlalchemy~=1.0`
+- Install SQLAlchemy v2 using `pip install databricks-sqlalchemy`
+
 
 ## Contributing
 

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "databricks-sql-connector"
-version = "4.0.0.b3"
+version = "4.0.0.b4"
 description = "Databricks SQL Connector for Python"
 authors = ["Databricks <[email protected]>"]
 license = "Apache-2.0"
@@ -23,7 +23,6 @@ numpy = [
 ]
 openpyxl = "^3.0.10"
 urllib3 = ">=1.26"
-
 pyarrow = { version = ">=14.0.1,<17", optional=true }
 
 [tool.poetry.extras]