fix(impala): allow arbitrary connection params

docs/backends/impala.qmd

@@ -163,6 +163,26 @@ hdfs = ibis.impala.hdfs_connect(host=webhdfs_host, port=webhdfs_port)
 client = ibis.impala.connect(host=impala_host, port=impala_port, hdfs_client=hdfs)
 ```
 
+By default binary transport mode is used, however it is also possible to use HTTP.
+Depending on your configuration, additional connection arguments may need to be provided.
+For the full list of possible connection arguments please refer to
+the [`impyla`](https://github.com/cloudera/impyla) documentation.
+
+```python
+import ibis
+
+client = ibis.impala.connect(
+    host=impala_host,
+    port=impala_port,
+    username=username,
+    password=password,
+    use_ssl=True,
+    auth_mechanism='LDAP',
+    use_http_transport=True,
+    http_path='cliservice',
+)
+```
+
 All examples here use the following block of code to connect to impala
 using docker:
 

ibis/backends/impala/__init__.py

@@ -226,6 +226,7 @@ def do_connect(
         kerberos_service_name: str = "impala",
         pool_size: int = 8,
         hdfs_client: fsspec.spec.AbstractFileSystem | None = None,
+        **params: Any,
     ):
         """Create an Impala `Backend` for use with Ibis.
 
@@ -262,6 +263,10 @@ def do_connect(
             Size of the connection pool. Typically this is not necessary to configure.
         hdfs_client
             An existing HDFS client.
+        params
+            Any additional parameters necessary to open a connection to Impala.
+            Please refer to impyla documentation for the full list of
+            possible arguments.
 
         Examples
         --------
@@ -283,7 +288,6 @@ def do_connect(
         self._temp_objects = set()
         self._hdfs = hdfs_client
 
-        params = {}
         if ca_cert is not None:
             params["ca_cert"] = str(ca_cert)
         self.con = ImpalaConnection(