84 lines
2.8 KiB
Python
84 lines
2.8 KiB
Python
"""构造并 upsert NL2SQL 元数据行。"""
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from __future__ import annotations
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import time
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from collections.abc import Awaitable, Callable
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from typing import Any
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from nl2sql.embedding import embed_texts
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from nl2sql.metadata import build_metadata_chunks
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from nl2sql.milvus_collections import NL2SQL_COLLECTION
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def _escape_filter_value(value: str) -> str:
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return value.replace("\\", "\\\\").replace('"', '\\"')
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async def prepare_metadata_rows(
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chunks: list[dict[str, Any]],
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*,
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embedder: Callable[[list[str]], Awaitable[list[list[float]]]] = embed_texts,
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timestamp: int | None = None,
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) -> list[dict[str, Any]]:
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if not chunks:
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return []
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vectors = await embedder([chunk["text"] for chunk in chunks])
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if len(vectors) != len(chunks):
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raise ValueError("Embedding result count must match metadata chunk count")
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created_at = int(time.time()) if timestamp is None else timestamp
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return [
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{**chunk, "vector": vector, "created_at": created_at}
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for chunk, vector in zip(chunks, vectors)
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]
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async def sync_metadata(
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milvus_client,
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table_rows: list[dict[str, Any]],
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column_rows: list[dict[str, Any]],
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*,
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embedder: Callable[[list[str]], Awaitable[list[list[float]]]] = embed_texts,
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timestamp: int | None = None,
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) -> int:
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chunks = build_metadata_chunks(table_rows, column_rows)
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chunks_by_table: dict[str, list[dict[str, Any]]] = {}
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for chunk in chunks:
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chunks_by_table.setdefault(chunk["table_name"], []).append(chunk)
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updated_count = 0
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for table_name, table_chunks in chunks_by_table.items():
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escaped_name = _escape_filter_value(table_name)
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existing_rows = await milvus_client.query(
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collection_name=NL2SQL_COLLECTION,
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filter=f'table_name == "{escaped_name}"',
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output_fields=["id", "content_hash", "is_valid", "is_deprecated"],
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)
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desired_signature = {
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(chunk["id"], chunk["content_hash"], chunk["is_valid"], chunk["is_deprecated"])
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for chunk in table_chunks
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}
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existing_signature = {
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(
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row.get("id"),
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row.get("content_hash"),
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row.get("is_valid", True),
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row.get("is_deprecated", False),
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)
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for row in existing_rows or []
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}
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if desired_signature == existing_signature:
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continue
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if existing_rows:
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await milvus_client.delete(
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collection_name=NL2SQL_COLLECTION,
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filter=f'table_name == "{escaped_name}"',
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)
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rows = await prepare_metadata_rows(
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table_chunks, embedder=embedder, timestamp=timestamp
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)
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if rows:
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await milvus_client.upsert(collection_name=NL2SQL_COLLECTION, data=rows)
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updated_count += len(rows)
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return updated_count
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