reduce query complexity, fallback to using apoc.meta.schema

Author: Btibert3

servers/mcp-neo4j-cypher/src/mcp_neo4j_cypher/server.py

@@ -59,74 +59,8 @@ async def get_neo4j_schema() -> list[types.TextContent]:
         """
 
         get_schema_query = """
-CALL apoc.meta.data()
-YIELD label, property, type, other, unique, index, elementType
-
-// 1) collect all rows
-WITH collect({label:label,
-              property:property,
-              type:type,
-              other:other,
-              unique:unique,
-              index:index,
-              elementType:elementType}) AS meta
-
-// 2) extract each node‐label exactly once
-WITH meta,
-     apoc.coll.toSet([
-       row IN meta
-       WHERE row.elementType='node'
-         AND NOT row.label STARTS WITH '_'
-       | row.label
-     ]) AS labels
-
-UNWIND labels AS label
-
-// 3) build node attributes
-WITH meta, label,
-     [row IN meta
-      WHERE row.elementType='node'
-        AND row.label = label
-        AND row.type <> 'RELATIONSHIP'
-      | [ row.property,
-          row.type
-          + CASE WHEN row.unique THEN ' unique' ELSE '' END
-          + CASE WHEN row.index  THEN ' indexed' ELSE '' END
-        ]
-     ] AS attributes,
-
-     // 4) collect the outgoing‐rel “stubs”
-     [row IN meta
-      WHERE row.elementType='node'
-        AND row.label = label
-        AND row.type = 'RELATIONSHIP'
-      | row
-     ] AS relRows
-
-// 5) for each rel stub, look up its target and its own props
-WITH label, attributes,
-     [ r IN relRows |
-       [ r.property,
-         {
-           target: head(r.other),
-           properties: apoc.map.fromPairs(
-             [ rr IN meta
-               WHERE rr.elementType = 'relationship'
-                 AND rr.label = r.property
-                 AND rr.property <> '...'   // filter out any spurious meta-rows if needed
-               | [ rr.property, rr.type ]
-             ]
-           )
-         }
-       ]
-     ] AS relationships
-
-RETURN
-  label,
-  apoc.map.fromPairs(attributes)    AS attributes,
-  apoc.map.fromPairs(relationships) AS relationships;
-
-"""
+        CALL apoc.meta.schema();
+        """
 
         try:
             async with neo4j_driver.session(database=database) as session: