Initial commit

Author: BohuTANG

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install uv
+        run: pip install uv
+
+      - name: Sync dependencies
+        run: uv sync --all-extras --dev
+
+      - name: Run tests
+        env:
+          HF_HOME: ${{ github.workspace }}/.hf-cache
+          TRANSFORMERS_CACHE: ${{ github.workspace }}/.hf-cache
+        run: uv run pytest -m "not slow"

.gitignore

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+.venv/
+__pycache__/
+.pytest_cache/
+*.egg-info/
+.hf-cache/

LICENSE

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README.md

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+# databend-aiserver
+
+Blazing analytics, fast search, geo insights, and vector AI—supercharged in a
+new-era Databend warehouse. Databend AI Server fuses object storage and AI so
+all these capabilities are orchestrated with standard SQL.
+
+## UDFs (prefix `aiserver_`)
+- `list_stage_files(stage, limit)` – enumerate objects from external stages.
+- `read_pdf(stage, path)` – extract PDF text.
+- `read_docx(stage, path)` – extract DOCX text.
+- `vector_embed_text_1024(model, text)` – 1024-dim embeddings (batch-friendly).
+
+## Quickstart
+```bash
+uv sync
+uv run databend-aiserver --port 8815
+```
+
+## Sample SQL
+```sql
+-- 1. Register object-storage connection & stage.
+CREATE CONNECTION my_s3_connection
+  STORAGE_TYPE = 's3'
+  ACCESS_KEY_ID = '<your-access-key-id>'
+  SECRET_ACCESS_KEY = '<your-secret-access-key>';
+
+CREATE STAGE docs_stage
+  URL='s3://load/files/'
+  CONNECTION = (CONNECTION_NAME = 'my_s3_connection');
+
+-- 2. Query and analyze directly in Databend SQL.
+SELECT * FROM aiserver_list_stage_files(@docs_stage, 50);
+SELECT aiserver_read_pdf(@docs_stage, 'reports/q1.pdf');
+SELECT aiserver_read_docx(@docs_stage, 'reports/q1.docx');
+SELECT aiserver_vector_embed_text_1024('qwen', doc_body) FROM docs_tbl;
+```
+
+## Tests
+```bash
+uv run pytest
+uv run pytest -m "not slow"
+```

databend_aiserver/__init__.py

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+# Copyright 2025 Databend Labs
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""AI-enhanced Databend UDF server utilities."""
+
+from .server import create_server
+
+__all__ = ["create_server"]

databend_aiserver/main.py

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+# Copyright 2025 Databend Labs
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Command line entrypoint for the Databend AI UDF server."""
+
+from __future__ import annotations
+
+import argparse
+import logging
+import signal
+import sys
+from contextlib import suppress
+from typing import Optional
+
+from prometheus_client import start_http_server as start_prometheus_server
+
+from databend_aiserver.server import create_server
+
+logger = logging.getLogger(__name__)
+
+
+def _parse_args(argv: Optional[list[str]] = None) -> argparse.Namespace:
+    parser = argparse.ArgumentParser(description="Databend AI UDF server")
+    parser.add_argument("--host", default="0.0.0.0", help="Bind address for the gRPC server")
+    parser.add_argument("--port", type=int, default=8815, help="Port for the gRPC server")
+    parser.add_argument(
+        "--metrics-port",
+        type=int,
+        default=None,
+        help="Port for Prometheus metrics exporter (disabled when omitted).",
+    )
+    parser.add_argument(
+        "--log-level",
+        default="INFO",
+        help="Python logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL).",
+    )
+    return parser.parse_args(argv)
+
+
+def _configure_logging(level: str) -> None:
+    logging.basicConfig(
+        level=getattr(logging, level.upper(), logging.INFO),
+        format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
+    )
+
+
+def main(argv: Optional[list[str]] = None) -> int:
+    args = _parse_args(argv)
+    _configure_logging(args.log_level)
+
+    if args.metrics_port is not None:
+        start_prometheus_server(args.metrics_port)
+        logger.info("Prometheus metrics server started on port %s", args.metrics_port)
+
+    server = create_server(host=args.host, port=args.port, metric_port=args.metrics_port)
+    logger.info("Starting Databend AI UDF server on %s:%s", args.host, args.port)
+
+    # Handle shutdown gracefully to ensure we stop serving when receiving termination signals.
+    stop_event = getattr(server, "stopped", None)
+
+    def _handle_signal(signum, frame):  # noqa: ANN001 - signature dictated by signal library
+        logger.info("Received signal %s, shutting down.", signum)
+        with suppress(Exception):
+            server.shutdown()
+        if stop_event is not None:
+            stop_event.set()
+
+    signal.signal(signal.SIGINT, _handle_signal)
+    signal.signal(signal.SIGTERM, _handle_signal)
+
+    try:
+        server.serve()
+    except KeyboardInterrupt:
+        logger.info("Interrupted, stopping server.")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())