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From GitBox <...@apache.org>
Subject [GitHub] mistercrunch commented on a change in pull request #4834: Load async sql lab results early for Presto
Date Fri, 01 Jun 2018 16:34:13 GMT
mistercrunch commented on a change in pull request #4834: Load async sql lab results early
for Presto
URL: https://github.com/apache/incubator-superset/pull/4834#discussion_r192441773
 
 

 ##########
 File path: superset/db_engine_specs.py
 ##########
 @@ -737,12 +761,20 @@ def handle_cursor(cls, cursor, query, session):
         while polled:
             # Update the object and wait for the kill signal.
             stats = polled.get('stats', {})
-
             query = session.query(type(query)).filter_by(id=query.id).one()
             if query.status in [QueryStatus.STOPPED, QueryStatus.TIMED_OUT]:
                 cursor.cancel()
                 break
 
+            if (
+                config.get('PREFETCH_ASYNC') and
+                (not query.has_loaded_early)
+            ):
+                query.has_loaded_early = True
+                limit = config.get('PREFETCH_ROWS')
 
 Review comment:
   `prefetch_count` would be a better name than `limit` as limit has different meaning around
limiting the query itself.

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