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Type:
New Feature
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Resolution: Duplicate
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Priority:
Minor - P4
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None
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Affects Version/s: None
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Component/s: Performance, Querying, Sharding, Write Ops
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Labels:None
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Environment:Linux, Mongo 2.0.6, 3 shards (each in replica set with 2 machines and 1 arbiter)
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Query
I can not find similar mysql syntax "INSERT ... SELECT ..." in mongo for sharded collection.
db.eval() - does not work on sharded collection
MapReduce - too expensive and slow operation
Use case:
Need select documents from one sharded collection, make rearrangement of fields and upsert it to another sharded collection.
Source collection format:
{
"_id": ObjectId("4fcf7349d144ad591c016534"),
"sid": 111,
"uh": "www.site.kz",
"cid": "4facd5427701a",
"ses": "4fcf7278f1f19",
"ip": NumberInt(1597732605),
"t": ISODate("2012-06-06T15: 08: 40.0Z"),
...
}
Destination collection format:
{
"_id":
,
"t": ISODate("2012-06-06T15: 08: 40.0Z"),
}
- depends on
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- Closed
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SERVER-12280 allow $out to append to/merge with existing collection instead of replacing it
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- Closed
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- duplicates
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- Closed
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