feat: use faster query_and_wait method from google-cloud-bigquery when available

fix unit tests

fix python 3.7

fix python 3.7

fix python 3.7

fix python 3.7

fix wait_timeout units

boost test coverage

remove dead code

boost a little more coverage

Author: tswast

pandas_gbq/features.py

@@ -4,8 +4,9 @@
 
 """Module for checking dependency versions and supported features."""
 
-# https://github.com/googleapis/python-bigquery/blob/master/CHANGELOG.md
+# https://github.com/googleapis/python-bigquery/blob/main/CHANGELOG.md
 BIGQUERY_MINIMUM_VERSION = "3.3.5"
+BIGQUERY_QUERY_AND_WAIT_VERSION = "3.14.0"
 PANDAS_VERBOSITY_DEPRECATION_VERSION = "0.23.0"
 PANDAS_BOOLEAN_DTYPE_VERSION = "1.0.0"
 PANDAS_PARQUET_LOSSLESS_TIMESTAMP_VERSION = "1.1.0"
@@ -45,6 +46,13 @@ def bigquery_try_import(self):
 
         return google.cloud.bigquery
 
+    @property
+    def bigquery_has_query_and_wait(self):
+        import packaging.version
+
+        min_version = packaging.version.parse(BIGQUERY_QUERY_AND_WAIT_VERSION)
+        return self.bigquery_installed_version >= min_version
+
     @property
     def pandas_installed_version(self):
         import pandas

pandas_gbq/gbq.py

@@ -351,12 +351,17 @@ def process_http_error(ex):
         # See `BigQuery Troubleshooting Errors
         # <https://cloud.google.com/bigquery/troubleshooting-errors>`__
 
-        if "cancelled" in ex.message:
+        message = (
+            ex.message.casefold()
+            if hasattr(ex, "message") and ex.message is not None
+            else ""
+        )
+        if "cancelled" in message:
             raise QueryTimeout("Reason: {0}".format(ex))
-        elif "Provided Schema does not match" in ex.message:
+        elif "schema does not match" in message:
             error_message = ex.errors[0]["message"]
             raise InvalidSchema(f"Reason: {error_message}")
-        elif "Already Exists: Table" in ex.message:
+        elif "already exists: table" in message:
             error_message = ex.errors[0]["message"]
             raise TableCreationError(f"Reason: {error_message}")
         else:
@@ -410,16 +415,29 @@ def run_query(self, query, max_results=None, progress_bar_type=None, **kwargs):
 
         self._start_timer()
         job_config = bigquery.QueryJobConfig.from_api_repr(job_config_dict)
-        rows_iter = pandas_gbq.query.query_and_wait(
-            self,
-            self.client,
-            query,
-            location=self.location,
-            project_id=self.project_id,
-            job_config=job_config,
-            max_results=max_results,
-            timeout_ms=timeout_ms,
-        )
+
+        if FEATURES.bigquery_has_query_and_wait:
+            rows_iter = pandas_gbq.query.query_and_wait_via_client_library(
+                self,
+                self.client,
+                query,
+                location=self.location,
+                project_id=self.project_id,
+                job_config=job_config,
+                max_results=max_results,
+                timeout_ms=timeout_ms,
+            )
+        else:
+            rows_iter = pandas_gbq.query.query_and_wait(
+                self,
+                self.client,
+                query,
+                location=self.location,
+                project_id=self.project_id,
+                job_config=job_config,
+                max_results=max_results,
+                timeout_ms=timeout_ms,
+            )
 
         dtypes = kwargs.get("dtypes")
         return self._download_results(

pandas_gbq/query.py

@@ -5,9 +5,11 @@
 from __future__ import annotations
 
 import concurrent.futures
+import functools
 import logging
 from typing import Optional
 
+import google.auth.exceptions
 from google.cloud import bigquery
 
 import pandas_gbq.exceptions
@@ -78,6 +80,26 @@ def _wait_for_query_job(
             connector.process_http_error(ex)
 
 
+def try_query(connector, query_fn):
+    try:
+        logger.debug("Requesting query... ")
+        return query_fn()
+    except concurrent.futures.TimeoutError as ex:
+        raise pandas_gbq.exceptions.QueryTimeout("Reason: {0}".format(ex))
+    except (google.auth.exceptions.RefreshError, ValueError) as ex:
+        if connector.private_key:
+            raise pandas_gbq.exceptions.AccessDenied(
+                f"The service account credentials are not valid: {ex}"
+            )
+        else:
+            raise pandas_gbq.exceptions.AccessDenied(
+                "The credentials have been revoked or expired, "
+                f"please re-run the application to re-authorize: {ex}"
+            )
+    except connector.http_error as ex:
+        connector.process_http_error(ex)
+
+
 def query_and_wait(
     connector,
     client: bigquery.Client,
@@ -122,29 +144,17 @@ def query_and_wait(
             Result iterator from which we can download the results in the
             desired format (pandas.DataFrame).
     """
-    from google.auth.exceptions import RefreshError
-
-    try:
-        logger.debug("Requesting query... ")
-        query_reply = client.query(
+    query_reply = try_query(
+        connector,
+        functools.partial(
+            client.query,
             query,
             job_config=job_config,
             location=location,
             project=project_id,
-        )
-        logger.debug("Query running...")
-    except (RefreshError, ValueError) as ex:
-        if connector.private_key:
-            raise pandas_gbq.exceptions.AccessDenied(
-                f"The service account credentials are not valid: {ex}"
-            )
-        else:
-            raise pandas_gbq.exceptions.AccessDenied(
-                "The credentials have been revoked or expired, "
-                f"please re-run the application to re-authorize: {ex}"
-            )
-    except connector.http_error as ex:
-        connector.process_http_error(ex)
+        ),
+    )
+    logger.debug("Query running...")
 
     job_id = query_reply.job_id
     logger.debug("Job ID: %s" % job_id)
@@ -173,3 +183,30 @@ def query_and_wait(
         return query_reply.result(max_results=max_results)
     except connector.http_error as ex:
         connector.process_http_error(ex)
+
+
+def query_and_wait_via_client_library(
+    connector,
+    client: bigquery.Client,
+    query: str,
+    *,
+    job_config: bigquery.QueryJobConfig,
+    location: Optional[str],
+    project_id: Optional[str],
+    max_results: Optional[int],
+    timeout_ms: Optional[int],
+):
+    rows_iter = try_query(
+        connector,
+        functools.partial(
+            client.query_and_wait,
+            query,
+            job_config=job_config,
+            location=location,
+            project=project_id,
+            max_results=max_results,
+            wait_timeout=timeout_ms / 1000.0 if timeout_ms else None,
+        ),
+    )
+    logger.debug("Query done.\n")
+    return rows_iter

tests/system/test_gbq.py

@@ -426,33 +426,6 @@ def test_query_inside_configuration(self, project_id):
         )
         tm.assert_frame_equal(df, DataFrame({"valid_string": ["PI"]}))
 
-    def test_configuration_without_query(self, project_id):
-        sql_statement = "SELECT 1"
-        config = {
-            "copy": {
-                "sourceTable": {
-                    "projectId": project_id,
-                    "datasetId": "publicdata:samples",
-                    "tableId": "wikipedia",
-                },
-                "destinationTable": {
-                    "projectId": project_id,
-                    "datasetId": "publicdata:samples",
-                    "tableId": "wikipedia_copied",
-                },
-            }
-        }
-        # Test that only 'query' configurations are supported
-        # nor 'copy','load','extract'
-        with pytest.raises(ValueError):
-            gbq.read_gbq(
-                sql_statement,
-                project_id=project_id,
-                credentials=self.credentials,
-                configuration=config,
-                dialect="legacy",
-            )
-
     def test_configuration_raises_value_error_with_multiple_config(self, project_id):
         sql_statement = "SELECT 1"
         config = {

tests/unit/test_context.py

@@ -8,6 +8,7 @@
 
 import google.cloud.bigquery
 import google.cloud.bigquery.table
+import packaging.version
 import pytest
 
 
@@ -55,8 +56,15 @@ def test_read_gbq_should_save_credentials(mock_get_credentials):
     mock_get_credentials.assert_not_called()
 
 
-def test_read_gbq_should_use_dialect(mock_bigquery_client):
+def test_read_gbq_should_use_dialect_with_query(monkeypatch, mock_bigquery_client):
     import pandas_gbq
+    import pandas_gbq.features
+
+    monkeypatch.setattr(
+        pandas_gbq.features.FEATURES,
+        "_bigquery_installed_version",
+        packaging.version.parse(pandas_gbq.features.BIGQUERY_MINIMUM_VERSION),
+    )
 
     assert pandas_gbq.context.dialect is None
     pandas_gbq.context.dialect = "legacy"
@@ -71,3 +79,35 @@ def test_read_gbq_should_use_dialect(mock_bigquery_client):
     _, kwargs = mock_bigquery_client.query.call_args
     assert not kwargs["job_config"].use_legacy_sql
     pandas_gbq.context.dialect = None  # Reset the global state.
+
+
+def test_read_gbq_should_use_dialect_with_query_and_wait(
+    monkeypatch, mock_bigquery_client
+):
+    if not hasattr(mock_bigquery_client, "query_and_wait"):
+        pytest.skip(
+            f"google-cloud-bigquery {google.cloud.bigquery.__version__} does not have query_and_wait"
+        )
+
+    import pandas_gbq
+    import pandas_gbq.features
+
+    monkeypatch.setattr(
+        pandas_gbq.features.FEATURES,
+        "_bigquery_installed_version",
+        packaging.version.parse(pandas_gbq.features.BIGQUERY_QUERY_AND_WAIT_VERSION),
+    )
+
+    assert pandas_gbq.context.dialect is None
+    pandas_gbq.context.dialect = "legacy"
+    pandas_gbq.read_gbq("SELECT 1")
+
+    _, kwargs = mock_bigquery_client.query_and_wait.call_args
+    assert kwargs["job_config"].use_legacy_sql
+
+    pandas_gbq.context.dialect = "standard"
+    pandas_gbq.read_gbq("SELECT 1")
+
+    _, kwargs = mock_bigquery_client.query_and_wait.call_args
+    assert not kwargs["job_config"].use_legacy_sql
+    pandas_gbq.context.dialect = None  # Reset the global state.

tests/unit/test_features.py

@@ -13,6 +13,23 @@ def fresh_bigquery_version(monkeypatch):
     monkeypatch.setattr(FEATURES, "_pandas_installed_version", None)
 
 
+@pytest.mark.parametrize(
+    ["bigquery_version", "expected"],
+    [
+        ("1.99.100", False),
+        ("2.99.999", False),
+        ("3.13.11", False),
+        ("3.14.0", True),
+        ("4.999.999", True),
+    ],
+)
+def test_bigquery_has_query_and_wait(monkeypatch, bigquery_version, expected):
+    import google.cloud.bigquery
+
+    monkeypatch.setattr(google.cloud.bigquery, "__version__", bigquery_version)
+    assert FEATURES.bigquery_has_query_and_wait == expected
+
+
 @pytest.mark.parametrize(
     ["pandas_version", "expected"],
     [