We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
[reports] Data.csv.gz don't need to contain id column
It has these columns because data.csv.gz contains data from a join query of snapshots on trials.
time_started and time_ended are from trials but they are probably not useful for the analysis people want to do so they just take up space at this point.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `analysis/queries.py`
Content:
```
1 # Copyright 2020 Google LLC
2 #
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
6 #
7 #      http://www.apache.org/licenses/LICENSE-2.0
8 #
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
14 """Database queries for acquiring experiment data."""
15 
16 import pandas as pd
17 import sqlalchemy
18 
19 from database import models
20 from database import utils as db_utils
21 
22 
23 def get_experiment_data(experiment_names):
24     """Get measurements (such as coverage) on experiments from the database."""
25     snapshots_query = db_utils.query(models.Snapshot).options(
26         sqlalchemy.orm.joinedload('trial')).filter(
27             models.Snapshot.trial.has(
28                 models.Trial.experiment.in_(experiment_names)))
29     return pd.read_sql_query(snapshots_query.statement, db_utils.engine)
30
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/analysis/queries.py b/analysis/queries.py
--- a/analysis/queries.py
+++ b/analysis/queries.py
@@ -26,4 +26,8 @@
         sqlalchemy.orm.joinedload('trial')).filter(
             models.Snapshot.trial.has(
                 models.Trial.experiment.in_(experiment_names)))
-    return pd.read_sql_query(snapshots_query.statement, db_utils.engine)
+
+    # id must be loaded to do the join but get rid of it now since
+    # trial_id provides the same info.
+    data = pd.read_sql_query(snapshots_query.statement, db_utils.engine)
+    return data.drop(columns=['id'])

{"golden_diff": "diff --git a/analysis/queries.py b/analysis/queries.py\n--- a/analysis/queries.py\n+++ b/analysis/queries.py\n@@ -26,4 +26,8 @@\n         sqlalchemy.orm.joinedload('trial')).filter(\n             models.Snapshot.trial.has(\n                 models.Trial.experiment.in_(experiment_names)))\n-    return pd.read_sql_query(snapshots_query.statement, db_utils.engine)\n+\n+    # id must be loaded to do the join but get rid of it now since\n+    # trial_id provides the same info.\n+    data = pd.read_sql_query(snapshots_query.statement, db_utils.engine)\n+    return data.drop(columns=['id'])\n", "issue": "[reports] Data.csv.gz don't need to contain id column\nIt has these columns because data.csv.gz contains data from a join query of snapshots on trials.\r\ntime_started and time_ended are from trials but they are probably not useful for the analysis people want to do so they just take up space at this point.\n", "before_files": [{"content": "# Copyright 2020 Google LLC\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\"\"\"Database queries for acquiring experiment data.\"\"\"\n\nimport pandas as pd\nimport sqlalchemy\n\nfrom database import models\nfrom database import utils as db_utils\n\n\ndef get_experiment_data(experiment_names):\n    \"\"\"Get measurements (such as coverage) on experiments from the database.\"\"\"\n    snapshots_query = db_utils.query(models.Snapshot).options(\n        sqlalchemy.orm.joinedload('trial')).filter(\n            models.Snapshot.trial.has(\n                models.Trial.experiment.in_(experiment_names)))\n    return pd.read_sql_query(snapshots_query.statement, db_utils.engine)\n", "path": "analysis/queries.py"}], "after_files": [{"content": "# Copyright 2020 Google LLC\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#      http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\"\"\"Database queries for acquiring experiment data.\"\"\"\n\nimport pandas as pd\nimport sqlalchemy\n\nfrom database import models\nfrom database import utils as db_utils\n\n\ndef get_experiment_data(experiment_names):\n    \"\"\"Get measurements (such as coverage) on experiments from the database.\"\"\"\n    snapshots_query = db_utils.query(models.Snapshot).options(\n        sqlalchemy.orm.joinedload('trial')).filter(\n            models.Snapshot.trial.has(\n                models.Trial.experiment.in_(experiment_names)))\n\n    # id must be loaded to do the join but get rid of it now since\n    # trial_id provides the same info.\n    data = pd.read_sql_query(snapshots_query.statement, db_utils.engine)\n    return data.drop(columns=['id'])\n", "path": "analysis/queries.py"}]}