fix(postgres): update document status with partial update instead of full upsert

lightrag/base.py

@@ -202,3 +202,7 @@ class DocStatusStorage(BaseKVStorage):
     async def get_pending_docs(self) -> dict[str, DocProcessingStatus]:
         """Get all pending documents"""
         raise NotImplementedError
+
+    async def update_doc_status(self, data: dict[str, Any]) -> None:
+        """Updates the status of a document. By default, it calls upsert."""
+        await self.upsert(data)

lightrag/kg/postgres_impl.py

@@ -471,7 +471,7 @@ class PGDocStatusStorage(DocStatusStorage):
         self, status: DocStatus
     ) -> Dict[str, DocProcessingStatus]:
         """Get all documents by status"""
-        sql = "select * from LIGHTRAG_DOC_STATUS where workspace=$1 and status=$1"
+        sql = "select * from LIGHTRAG_DOC_STATUS where workspace=$1 and status=$2"
         params = {"workspace": self.db.workspace, "status": status}
         result = await self.db.query(sql, params, True)
         return {
@@ -505,8 +505,8 @@ class PGDocStatusStorage(DocStatusStorage):
         Args:
             data: Dictionary of document IDs and their status data
         """
-        sql = """insert into LIGHTRAG_DOC_STATUS(workspace,id,content_summary,content_length,chunks_count,status)
+        sql = """insert into LIGHTRAG_DOC_STATUS(workspace,id,content,content_summary,content_length,chunks_count,status)
-                 values($1,$2,$3,$4,$5,$6)
+                 values($1,$2,$3,$4,$5,$6,$7)
                   on conflict(id,workspace) do update set
                   content = EXCLUDED.content,
                   content_summary = EXCLUDED.content_summary,
@@ -530,6 +530,30 @@ class PGDocStatusStorage(DocStatusStorage):
             )
         return data
 
+    async def update_doc_status(self, data: dict[str, dict]) -> None:
+        """
+        Updates only the document status, chunk count, and updated timestamp.
+
+        This method ensures that only relevant fields are updated instead of overwriting
+        the entire document record. If `updated_at` is not provided, the database will
+        automatically use the current timestamp.
+        """
+        sql = """
+        UPDATE LIGHTRAG_DOC_STATUS
+        SET status = $3,
+            chunks_count = $4,
+            updated_at = CURRENT_TIMESTAMP
+        WHERE workspace = $1 AND id = $2
+        """
+        for k, v in data.items():
+            _data = {
+                "workspace": self.db.workspace,
+                "id": k,
+                "status": v["status"].value,  # Convert Enum to string
+                "chunks_count": v.get("chunks_count", -1),  # Default to -1 if not provided
+            }
+            await self.db.execute(sql, _data)
+
 
 class PGGraphQueryException(Exception):
     """Exception for the AGE queries."""
@@ -1103,6 +1127,7 @@ TABLES = {
         "ddl": """CREATE TABLE LIGHTRAG_DOC_STATUS (
 	               workspace varchar(255) NOT NULL,
 	               id varchar(255) NOT NULL,
+                   content TEXT,
 	               content_summary varchar(255) NULL,
 	               content_length int4 NULL,
 	               chunks_count int4 NULL,

lightrag/lightrag.py

@@ -542,6 +542,7 @@ class LightRAG:
                         doc_status_id: {
                             "status": DocStatus.PROCESSING,
                             "updated_at": datetime.now().isoformat(),
+                            "content": status_doc.content,
                             "content_summary": status_doc.content_summary,
                             "content_length": status_doc.content_length,
                             "created_at": status_doc.created_at,
@@ -573,7 +574,7 @@ class LightRAG:
                 ]
                 try:
                     await asyncio.gather(*tasks)
-                    await self.doc_status.upsert(
+                    await self.doc_status.update_doc_status(
                         {
                             doc_status_id: {
                                 "status": DocStatus.PROCESSED,
@@ -586,7 +587,7 @@ class LightRAG:
 
                 except Exception as e:
                     logger.error(f"Failed to process document {doc_id}: {str(e)}")
-                    await self.doc_status.upsert(
+                    await self.doc_status.update_doc_status(
                         {
                             doc_status_id: {
                                 "status": DocStatus.FAILED,