Don't select vector on infinity (#11151)

### What problem does this PR solve?

Don't select vector on infinity

### Type of change

- [x] Performance Improvement

rag/utils/infinity_conn.py

@@ -156,6 +156,7 @@ class InfinityConnection(DocStoreConnection):
             msg = f"Infinity {infinity_uri} is unhealthy in 120s."
             logger.error(msg)
             raise Exception(msg)
+        self.column_vec_patt = re.compile(r"q_(?P<vector_size>\d+)_vec")
         logger.info(f"Infinity {infinity_uri} is healthy.")
 
     def _migrate_db(self, inf_conn):
@@ -323,7 +324,8 @@ class InfinityConnection(DocStoreConnection):
                 output.append(score_func)
             if PAGERANK_FLD not in output:
                 output.append(PAGERANK_FLD)
-        output = [f for f in output if f != "_score"]
+        output = [f for f in output if f != "_score" and self.column_vec_patt.match(f) is None]
+        logger.info(f"infinity output fields: {output}")
         if limit <= 0:
             # ElasticSearch default limit is 10000
             limit = 10000