This renders covered indexes ineffective when shardingState.needShardChunkManager(pq.ns()) is true. Not sure if this is true in all sharding setups or just some.
DiskLoc cl = _c->currLoc();
if ( _chunkManager && ! _chunkManager->belongsToMe( cl.obj() ) ) { // TODO: should make this covered at some point
_nChunkSkips++;
// log() << "TEMP skipping un-owned chunk: " << _c->current() << endl;
}
- is related to
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DOCS-2793 Document that sharded clusters don't support covered queries
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- Closed
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SERVER-3334 Stop processing bson fields in projection.transform after projections met (esp. _id)
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- Backlog
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- related to
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DOCS-4571 In 2.8 sharded clusters support covered queries
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- Closed
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