Store tables as PARQUET files

.github/workflows/test.yml

@@ -15,12 +15,13 @@ jobs:
         os: [ ubuntu-20.04, windows-latest, macOS-latest ]
         python-version: [ '3.10' ]
         include:
-          - os: ubuntu-latest
-            python-version: '3.8'
           - os: ubuntu-latest
             python-version: '3.9'
           - os: ubuntu-latest
             python-version: '3.11'
+          - os: ubuntu-latest
+            python-version: '3.9'
+            requirements: 'minimum'
 
     steps:
     - uses: actions/checkout@v4
@@ -50,6 +51,16 @@ jobs:
         pip install -r requirements.txt
         pip install -r tests/requirements.txt
 
+    - name: Downgrade to minimum dependencies
+      run: |
+        pip install "audeer==2.0.0"
+        pip install "audiofile==0.4.0"
+        pip install "numpy<2.0.0"
+        pip install "pandas==2.1.0"
+        pip install "pyarrow==10.0.1"
+        pip install "pyyaml==5.4.1"
+      if: matrix.requirements == 'minimum'
+
     - name: Test with pytest
       run: |
         python -m pytest

audformat/core/database.py

@@ -979,7 +979,7 @@ def save(
         r"""Save database to disk.
 
         Creates a header ``<root>/<name>.yaml``
-        and for every table a file ``<root>/<name>.<table-id>.[csv,pkl]``.
+        and for every table a file ``<root>/<name>.<table-id>.[csv,parquet,pkl]``.
 
         Existing files will be overwritten.
         If ``update_other_formats`` is provided,
@@ -1383,7 +1383,7 @@ def load(
         r"""Load database from disk.
 
         Expects a header ``<root>/<name>.yaml``
-        and for every table a file ``<root>/<name>.<table-id>.[csv|pkl]``
+        and for every table a file ``<root>/<name>.<table-id>.[csv|parquet|pkl]``
         Media files should be located under ``root``.
 
         Args:
@@ -1409,7 +1409,7 @@ def load(
         Raises:
             FileNotFoundError: if the database header file cannot be found
                 under ``root``
-            RuntimeError: if a CSV table file is newer
+            RuntimeError: if a CSV or PARQUET table file is newer
                 than the corresponding PKL file
 
         """

audformat/core/define.py

@@ -337,6 +337,9 @@ class TableStorageFormat(DefineBase):
     CSV = "csv"
     """File extension for tables stored in CSV format."""
 
+    PARQUET = "parquet"
+    """File extension for tables stored in PARQUET format."""
+
     PICKLE = "pkl"
     """File extension for tables stored in PKL format."""