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| author | Matthew Russotto <matthew.russotto@10gen.com> | 2017-09-19 12:01:35 -0400 |
|---|---|---|
| committer | Matthew Russotto <matthew.russotto@10gen.com> | 2017-09-19 12:01:35 -0400 |
| commit | d1c2d57cd919bcead99fe4b37a821b7e3e4a9def (patch) | |
| tree | 6baf8c0214dc00c0cc3caae872a1b64210c081c1 /src/mongo/db/query/query_planner.cpp | |
| parent | d9352b6514140727a1c4b402356d5c86055d6db9 (diff) | |
| download | mongo-d1c2d57cd919bcead99fe4b37a821b7e3e4a9def.tar.gz | |
SERVER-31154 Make planner options stringizer check completeness at compile time.
Diffstat (limited to 'src/mongo/db/query/query_planner.cpp')
| -rw-r--r-- | src/mongo/db/query/query_planner.cpp | 88 |
1 files changed, 49 insertions, 39 deletions
diff --git a/src/mongo/db/query/query_planner.cpp b/src/mongo/db/query/query_planner.cpp index c033911f4ba..a184606e256 100644 --- a/src/mongo/db/query/query_planner.cpp +++ b/src/mongo/db/query/query_planner.cpp @@ -87,48 +87,58 @@ static bool is2DIndex(const BSONObj& pattern) { string optionString(size_t options) { mongoutils::str::stream ss; - // These options are all currently mutually exclusive. if (QueryPlannerParams::DEFAULT == options) { ss << "DEFAULT "; } - if (options & QueryPlannerParams::NO_TABLE_SCAN) { - ss << "NO_TABLE_SCAN "; - } - if (options & QueryPlannerParams::INCLUDE_COLLSCAN) { - ss << "INCLUDE_COLLSCAN "; - } - if (options & QueryPlannerParams::INCLUDE_SHARD_FILTER) { - ss << "INCLUDE_SHARD_FILTER "; - } - if (options & QueryPlannerParams::NO_BLOCKING_SORT) { - ss << "NO_BLOCKING_SORT "; - } - if (options & QueryPlannerParams::INDEX_INTERSECTION) { - ss << "INDEX_INTERSECTION "; - } - if (options & QueryPlannerParams::KEEP_MUTATIONS) { - ss << "KEEP_MUTATIONS "; - } - if (options & QueryPlannerParams::IS_COUNT) { - ss << "IS_COUNT "; - } - if (options & QueryPlannerParams::SPLIT_LIMITED_SORT) { - ss << "SPLIT_LIMITED_SORT "; - } - if (options & QueryPlannerParams::CANNOT_TRIM_IXISECT) { - ss << "CANNOT_TRIM_IXISECT "; - } - if (options & QueryPlannerParams::SNAPSHOT_USE_ID) { - ss << "SNAPSHOT_USE_ID "; - } - if (options & QueryPlannerParams::NO_UNCOVERED_PROJECTIONS) { - ss << "NO_UNCOVERED_PROJECTIONS "; - } - if (options & QueryPlannerParams::GENERATE_COVERED_IXSCANS) { - ss << "GENERATE_COVERED_IXSCANS "; - } - if (options & QueryPlannerParams::TRACK_LATEST_OPLOG_TS) { - ss << "TRACK_LATEST_OPLOG_TS "; + while (options) { + // The expression (x & (x - 1)) yields x with the lowest bit cleared. Then the exclusive-or + // of the result with the original yields the lowest bit by itself. + size_t new_options = options & (options - 1); + QueryPlannerParams::Options opt = QueryPlannerParams::Options(new_options ^ options); + options = new_options; + switch (opt) { + case QueryPlannerParams::NO_TABLE_SCAN: + ss << "NO_TABLE_SCAN "; + break; + case QueryPlannerParams::INCLUDE_COLLSCAN: + ss << "INCLUDE_COLLSCAN "; + break; + case QueryPlannerParams::INCLUDE_SHARD_FILTER: + ss << "INCLUDE_SHARD_FILTER "; + break; + case QueryPlannerParams::NO_BLOCKING_SORT: + ss << "NO_BLOCKING_SORT "; + break; + case QueryPlannerParams::INDEX_INTERSECTION: + ss << "INDEX_INTERSECTION "; + break; + case QueryPlannerParams::KEEP_MUTATIONS: + ss << "KEEP_MUTATIONS "; + break; + case QueryPlannerParams::IS_COUNT: + ss << "IS_COUNT "; + break; + case QueryPlannerParams::SPLIT_LIMITED_SORT: + ss << "SPLIT_LIMITED_SORT "; + break; + case QueryPlannerParams::CANNOT_TRIM_IXISECT: + ss << "CANNOT_TRIM_IXISECT "; + break; + case QueryPlannerParams::SNAPSHOT_USE_ID: + ss << "SNAPSHOT_USE_ID "; + break; + case QueryPlannerParams::NO_UNCOVERED_PROJECTIONS: + ss << "NO_UNCOVERED_PROJECTIONS "; + break; + case QueryPlannerParams::GENERATE_COVERED_IXSCANS: + ss << "GENERATE_COVERED_IXSCANS "; + break; + case QueryPlannerParams::TRACK_LATEST_OPLOG_TS: + ss << "TRACK_LATEST_OPLOG_TS "; + case QueryPlannerParams::DEFAULT: + MONGO_UNREACHABLE; + break; + } } return ss; |