diff options
Diffstat (limited to 'src/mongo/db/query/query_planner_params.h')
| -rw-r--r-- | src/mongo/db/query/query_planner_params.h | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/src/mongo/db/query/query_planner_params.h b/src/mongo/db/query/query_planner_params.h index 9229dbb06ce..6597211ad7d 100644 --- a/src/mongo/db/query/query_planner_params.h +++ b/src/mongo/db/query/query_planner_params.h @@ -65,39 +65,36 @@ struct QueryPlannerParams { // See the comment on ShardFilterStage for details. INCLUDE_SHARD_FILTER = 1 << 2, - // Set this if you don't want any plans with a blocking sort stage. All sorts must be - // provided by an index. - NO_BLOCKING_SORT = 1 << 3, - // Set this if you want to turn on index intersection. - INDEX_INTERSECTION = 1 << 4, + INDEX_INTERSECTION = 1 << 3, - // Indicate to the planner that the caller is requesting a count operation, possibly through - // a count command, or as part of an aggregation pipeline. - IS_COUNT = 1 << 5, + // Indicate to the planner that this query could be eligible for count optimization. For + // example, the query {$group: {_id: null, sum: {$sum: 1}}} is a count-like operation and + // could be eligible for the COUNT_SCAN. + IS_COUNT = 1 << 4, // Set this if you want to handle batchSize properly with sort(). If limits on SORT // stages are always actually limits, then this should be left off. If they are // sometimes to be interpreted as batchSize, then this should be turned on. - SPLIT_LIMITED_SORT = 1 << 6, + SPLIT_LIMITED_SORT = 1 << 5, // Set this if you don't want any plans with a non-covered projection stage. All projections // must be provided/covered by an index. - NO_UNCOVERED_PROJECTIONS = 1 << 7, + NO_UNCOVERED_PROJECTIONS = 1 << 6, // Set this to generate covered whole IXSCAN plans. - GENERATE_COVERED_IXSCANS = 1 << 8, + GENERATE_COVERED_IXSCANS = 1 << 7, // Set this to track the most recent timestamp seen by this cursor while scanning the oplog. - TRACK_LATEST_OPLOG_TS = 1 << 9, + TRACK_LATEST_OPLOG_TS = 1 << 8, // Set this so that collection scans on the oplog wait for visibility before reading. - OPLOG_SCAN_WAIT_FOR_VISIBLE = 1 << 10, + OPLOG_SCAN_WAIT_FOR_VISIBLE = 1 << 9, // Set this so that getExecutorDistinct() will only use a plan that _guarantees_ it will // return exactly one document per value of the distinct field. See the comments above the // declaration of getExecutorDistinct() for more detail. - STRICT_DISTINCT_ONLY = 1 << 11, + STRICT_DISTINCT_ONLY = 1 << 10, }; // See Options enum above. |