[SERVER-22912] Query Optimizer Created: 01/Mar/16 Updated: 02/Mar/16 Resolved: 01/Mar/16 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Aggregation Framework, Querying |
| Affects Version/s: | 3.0.9 |
| Fix Version/s: | None |
| Type: | Improvement | Priority: | Trivial - P5 |
| Reporter: | Taelen Lewis | Assignee: | Unassigned |
| Resolution: | Duplicate | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Description |
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Feedback from long-term MongoDB community users: -index-covered queries will still fetch documents in the aggregation pipeline -$group only executes post cursor merge in aggregation pipeline, while it would be more efficient to do it pre-merge. |
| Comments |
| Comment by Charlie Swanson [ 01/Mar/16 ] |
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Hi taelen.lewis, I think that both of these requests have existing tickets (one of which has already been fixed!), which I have linked as duplicates. If you can think of a case in which the $group merging can be improved other than the case described in SERVER-5477, please let us know Thanks! |