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Posted to dev@drill.apache.org by "Leandro DG (JIRA)" <ji...@apache.org> on 2015/05/21 18:15:17 UTC
[jira] [Created] (DRILL-3165) Sorting a Mongo table should leverage
Mongo Indexes
Leandro DG created DRILL-3165:
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Summary: Sorting a Mongo table should leverage Mongo Indexes
Key: DRILL-3165
URL: https://issues.apache.org/jira/browse/DRILL-3165
Project: Apache Drill
Issue Type: Improvement
Components: Storage - MongoDB
Affects Versions: 1.0.0
Reporter: Leandro DG
Assignee: B Anil Kumar
When doing a query using Mongo, sorting takes place entirely in Drill.
Getting the first 1000 rows from a 1000000 rows table, sorted by a field which has an index takes a long time (about 45 seconds in our test environment).
Sample drill query:
Select c.name from mongo.foo.json_customers c order by c.name limit 1000
Doing the same in mongo client takes less than a second.
Sample mongo query: db.json_customers.find().sort({"name":1}).limit(1000)
Sorting by a field should leverage the existing mongo indexes if they exist.
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