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feat(postgres): Implement text_chunks upsert for PGKVStorage

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This commit is contained in:
yangdx 2025-06-28 12:11:53 +08:00
parent 0f51ec48f1
commit 3a8a99b73d
2 changed files with 47 additions and 7 deletions
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52
lightrag/kg/postgres_impl.py
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@ -520,7 +520,21 @@ class PGKVStorage(BaseKVStorage):
return
if is_namespace(self.namespace, NameSpace.KV_STORE_TEXT_CHUNKS):
pass
current_time = datetime.datetime.now(timezone.utc)
for k, v in data.items():
upsert_sql = SQL_TEMPLATES["upsert_text_chunk"]
_data = {
"workspace": self.db.workspace,
"id": k,
"tokens": v["tokens"],
"chunk_order_index": v["chunk_order_index"],
"full_doc_id": v["full_doc_id"],
"content": v["content"],
"file_path": v["file_path"],
"create_time": current_time,
"update_time": current_time,
}
await self.db.execute(upsert_sql, _data)
elif is_namespace(self.namespace, NameSpace.KV_STORE_FULL_DOCS):
for k, v in data.items():
upsert_sql = SQL_TEMPLATES["upsert_doc_full"]
@ -2409,7 +2423,7 @@ class PGGraphStorage(BaseGraphStorage):
NAMESPACE_TABLE_MAP = {
NameSpace.KV_STORE_FULL_DOCS: "LIGHTRAG_DOC_FULL",
NameSpace.KV_STORE_TEXT_CHUNKS: "LIGHTRAG_DOC_CHUNKS",
NameSpace.VECTOR_STORE_CHUNKS: "LIGHTRAG_DOC_CHUNKS",
NameSpace.VECTOR_STORE_CHUNKS: "LIGHTRAG_VDB_CHUNKS",
NameSpace.VECTOR_STORE_ENTITIES: "LIGHTRAG_VDB_ENTITY",
NameSpace.VECTOR_STORE_RELATIONSHIPS: "LIGHTRAG_VDB_RELATION",
NameSpace.DOC_STATUS: "LIGHTRAG_DOC_STATUS",
@ -2444,13 +2458,27 @@ TABLES = {
chunk_order_index INTEGER,
tokens INTEGER,
content TEXT,
content_vector VECTOR,
file_path VARCHAR(256),
create_time TIMESTAMP(0) WITH TIME ZONE,
update_time TIMESTAMP(0) WITH TIME ZONE,
CONSTRAINT LIGHTRAG_DOC_CHUNKS_PK PRIMARY KEY (workspace, id)
)"""
},
"LIGHTRAG_VDB_CHUNKS": {
"ddl": """CREATE TABLE LIGHTRAG_VDB_CHUNKS (
id VARCHAR(255),
workspace VARCHAR(255),
full_doc_id VARCHAR(256),
chunk_order_index INTEGER,
tokens INTEGER,
content TEXT,
content_vector VECTOR,
file_path VARCHAR(256),
create_time TIMESTAMP(0) WITH TIME ZONE,
update_time TIMESTAMP(0) WITH TIME ZONE,
CONSTRAINT LIGHTRAG_VDB_CHUNKS_PK PRIMARY KEY (workspace, id)
)"""
},
"LIGHTRAG_VDB_ENTITY": {
"ddl": """CREATE TABLE LIGHTRAG_VDB_ENTITY (
id VARCHAR(255),
@ -2551,7 +2579,20 @@ SQL_TEMPLATES = {
chunk_id=EXCLUDED.chunk_id,
update_time = CURRENT_TIMESTAMP
""",
"upsert_chunk": """INSERT INTO LIGHTRAG_DOC_CHUNKS (workspace, id, tokens,
"upsert_text_chunk": """INSERT INTO LIGHTRAG_DOC_CHUNKS (workspace, id, tokens,
chunk_order_index, full_doc_id, content, file_path,
create_time, update_time)
VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
ON CONFLICT (workspace,id) DO UPDATE
SET tokens=EXCLUDED.tokens,
chunk_order_index=EXCLUDED.chunk_order_index,
full_doc_id=EXCLUDED.full_doc_id,
content = EXCLUDED.content,
file_path=EXCLUDED.file_path,
update_time = EXCLUDED.update_time
""",
# SQL for VectorStorage
"upsert_chunk": """INSERT INTO LIGHTRAG_VDB_CHUNKS (workspace, id, tokens,
chunk_order_index, full_doc_id, content, content_vector, file_path,
create_time, update_time)
VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
@ -2564,7 +2605,6 @@ SQL_TEMPLATES = {
file_path=EXCLUDED.file_path,
update_time = EXCLUDED.update_time
""",
# SQL for VectorStorage
"upsert_entity": """INSERT INTO LIGHTRAG_VDB_ENTITY (workspace, id, entity_name, content,
content_vector, chunk_ids, file_path, create_time, update_time)
VALUES ($1, $2, $3, $4, $5, $6::varchar[], $7, $8, $9)
@ -2625,7 +2665,7 @@ SQL_TEMPLATES = {
"chunks": """
WITH relevant_chunks AS (
SELECT id as chunk_id
FROM LIGHTRAG_DOC_CHUNKS
FROM LIGHTRAG_VDB_CHUNKS
WHERE $2::varchar[] IS NULL OR full_doc_id = ANY($2::varchar[])
)
SELECT id, content, file_path, EXTRACT(EPOCH FROM create_time)::BIGINT as created_at FROM

2
lightrag/lightrag.py
View File

@ -394,13 +394,13 @@ class LightRAG:
embedding_func=self.embedding_func,
)
# TODO: deprecating, text_chunks is redundant with chunks_vdb
self.text_chunks: BaseKVStorage = self.key_string_value_json_storage_cls( # type: ignore
namespace=make_namespace(
self.namespace_prefix, NameSpace.KV_STORE_TEXT_CHUNKS
),
embedding_func=self.embedding_func,
)
self.chunk_entity_relation_graph: BaseGraphStorage = self.graph_storage_cls( # type: ignore
namespace=make_namespace(
self.namespace_prefix, NameSpace.GRAPH_STORE_CHUNK_ENTITY_RELATION