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Optimize graph query by simplifying MATCH pattern

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- Simplify MATCH clause to ()-[r]-()
- Remove node type constraints
- Improve query performance
This commit is contained in:
yangdx 2025-08-02 12:54:22 +08:00
parent a417f7c168
commit 2f0aa7ed12
1 changed files with 1 additions and 1 deletions
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lightrag/kg/postgres_impl.py
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@ -3289,7 +3289,7 @@ class PGGraphStorage(BaseGraphStorage):
query = f""" query = f"""
SELECT * FROM cypher('{self.graph_name}', $$ SELECT * FROM cypher('{self.graph_name}', $$
UNWIND {chunk_ids_str} AS chunk_id UNWIND {chunk_ids_str} AS chunk_id
MATCH (a:base)-[r]-(b:base) MATCH ()-[r]-()
WHERE r.source_id IS NOT NULL AND chunk_id IN split(r.source_id, '{GRAPH_FIELD_SEP}') WHERE r.source_id IS NOT NULL AND chunk_id IN split(r.source_id, '{GRAPH_FIELD_SEP}')
RETURN DISTINCT r, startNode(r) AS source, endNode(r) AS target RETURN DISTINCT r, startNode(r) AS source, endNode(r) AS target
$$) AS (edge agtype, source agtype, target agtype); $$) AS (edge agtype, source agtype, target agtype);