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tablestore support metadata filter & fix: top_k is ignored in full text search.

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pull/22774/head
xiaozhiqing.xzq 7 months ago
parent 5d5fa88857
commit f1bd616d22
1 changed files with 74 additions and 34 deletions
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108
api/core/rag/datasource/vdb/tablestore/tablestore_vector.py
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@ -118,10 +118,22 @@ class TableStoreVector(BaseVector):
def search_by_vector(self, query_vector: list[float], **kwargs: Any) -> list[Document]:
top_k = kwargs.get("top_k", 4)
return self._search_by_vector(query_vector, top_k)
document_ids_filter = kwargs.get("document_ids_filter")
filtered_list = None
if document_ids_filter:
filtered_list = ["document_id=" + item for item in document_ids_filter]
score_threshold = float(kwargs.get("score_threshold") or 0.0)
return self._search_by_vector(query_vector, filtered_list, top_k, score_threshold)
def search_by_full_text(self, query: str, **kwargs: Any) -> list[Document]:
return self._search_by_full_text(query)
top_k = kwargs.get("top_k", 4)
document_ids_filter = kwargs.get("document_ids_filter")
filtered_list = None
if document_ids_filter:
filtered_list = ["document_id=" + item for item in document_ids_filter]
score_threshold = float(kwargs.get("score_threshold") or 0.0)
return self._search_by_full_text(query, filtered_list, top_k, score_threshold)
def delete(self) -> None:
self._delete_table_if_exist()
@ -230,32 +242,51 @@ class TableStoreVector(BaseVector):
primary_key = [("id", id)]
row = tablestore.Row(primary_key)
self._tablestore_client.delete_row(self._table_name, row, None)
logging.info("Tablestore delete row successfully. id:%s", id)
def _search_by_metadata(self, key: str, value: str) -> list[str]:
query = tablestore.SearchQuery(
tablestore.TermQuery(self._tags_field, str(key) + "=" + str(value)),
limit=100,
limit=1000,
get_total_count=False,
)
rows = []
next_token = None
while True:
if next_token is not None:
query.next_token = next_token
search_response = self._tablestore_client.search(
table_name=self._table_name,
index_name=self._index_name,
search_query=query,
columns_to_get=tablestore.ColumnsToGet(
column_names=[Field.PRIMARY_KEY.value], return_type=tablestore.ColumnReturnType.SPECIFIED
),
)
search_response = self._tablestore_client.search(
table_name=self._table_name,
index_name=self._index_name,
search_query=query,
columns_to_get=tablestore.ColumnsToGet(return_type=tablestore.ColumnReturnType.ALL_FROM_INDEX),
)
if search_response is not None:
rows.extend(row[0][0][1] for row in search_response.rows)
return [row[0][0][1] for row in search_response.rows]
if search_response is None or search_response.next_token == b"":
break
else:
next_token = search_response.next_token
def _search_by_vector(self, query_vector: list[float], top_k: int) -> list[Document]:
ots_query = tablestore.KnnVectorQuery(
return rows
def _search_by_vector(
self, query_vector: list[float], document_ids_filter: list[str], top_k: int, score_threshold: float
) -> list[Document]:
knn_vector_query = tablestore.KnnVectorQuery(
field_name=Field.VECTOR.value,
top_k=top_k,
float32_query_vector=query_vector,
)
if document_ids_filter:
knn_vector_query.filter = tablestore.TermsQuery(self._tags_field, document_ids_filter)
sort = tablestore.Sort(sorters=[tablestore.ScoreSort(sort_order=tablestore.SortOrder.DESC)])
search_query = tablestore.SearchQuery(ots_query, limit=top_k, get_total_count=False, sort=sort)
search_query = tablestore.SearchQuery(knn_vector_query, limit=top_k, get_total_count=False, sort=sort)
search_response = self._tablestore_client.search(
table_name=self._table_name,
@ -263,30 +294,22 @@ class TableStoreVector(BaseVector):
search_query=search_query,
columns_to_get=tablestore.ColumnsToGet(return_type=tablestore.ColumnReturnType.ALL_FROM_INDEX),
)
logging.info(
"Tablestore search successfully. request_id:%s",
search_response.request_id,
)
return self._to_query_result(search_response)
def _to_query_result(self, search_response: tablestore.SearchResponse) -> list[Document]:
documents = []
for row in search_response.rows:
documents.append(
Document(
page_content=row[1][2][1],
vector=json.loads(row[1][3][1]),
metadata=json.loads(row[1][0][1]),
)
)
return self._to_query_result(search_response, score_threshold)
return documents
def _search_by_full_text(
self, query: str, document_ids_filter: list[str], top_k: int, score_threshold: float
) -> list[Document]:
bool_query = tablestore.BoolQuery()
bool_query.must_queries.append(tablestore.MatchQuery(text=query, field_name=Field.CONTENT_KEY.value))
if document_ids_filter:
bool_query.filter_queries.append(tablestore.TermsQuery(self._tags_field, document_ids_filter))
def _search_by_full_text(self, query: str) -> list[Document]:
search_query = tablestore.SearchQuery(
query=tablestore.MatchQuery(text=query, field_name=Field.CONTENT_KEY.value),
query=bool_query,
sort=tablestore.Sort(sorters=[tablestore.ScoreSort(sort_order=tablestore.SortOrder.DESC)]),
limit=100,
limit=top_k,
)
search_response = self._tablestore_client.search(
table_name=self._table_name,
@ -295,7 +318,24 @@ class TableStoreVector(BaseVector):
columns_to_get=tablestore.ColumnsToGet(return_type=tablestore.ColumnReturnType.ALL_FROM_INDEX),
)
return self._to_query_result(search_response)
return self._to_query_result(search_response, score_threshold)
@staticmethod
def _to_query_result(search_response: tablestore.SearchResponse, score_threshold: float) -> list[Document]:
documents = []
for search_hit in search_response.search_hits:
if search_hit.score > score_threshold:
metadata = json.loads(search_hit.row[1][0][1])
metadata["score"] = search_hit.score
documents.append(
Document(
page_content=search_hit.row[1][2][1],
vector=json.loads(search_hit.row[1][3][1]),
metadata=metadata,
)
)
documents = sorted(documents, key=lambda x: x.metadata["score"] if x.metadata else 0, reverse=True)
return documents
class TableStoreVectorFactory(AbstractVectorFactory):

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