diff options
Diffstat (limited to 'src/mongo/db/query/index_bounds_builder.cpp')
| -rw-r--r-- | src/mongo/db/query/index_bounds_builder.cpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/mongo/db/query/index_bounds_builder.cpp b/src/mongo/db/query/index_bounds_builder.cpp index 1f8dcae97e9..742faf4f938 100644 --- a/src/mongo/db/query/index_bounds_builder.cpp +++ b/src/mongo/db/query/index_bounds_builder.cpp @@ -121,6 +121,7 @@ bool stringMayHaveUnescapedPipe(StringData str) { const BSONObj kUndefinedElementObj = BSON("" << BSONUndefined); const BSONObj kNullElementObj = BSON("" << BSONNULL); +const BSONObj kEmptyArrayElementObj = BSON("" << BSONArray()); const Interval kHashedUndefinedInterval = IndexBoundsBuilder::makePointInterval( ExpressionMapping::hash(kUndefinedElementObj.firstElement())); @@ -558,6 +559,31 @@ void IndexBoundsBuilder::_translatePredicate(const MatchExpression* expr, return; } + if (MatchExpression::MATCH_IN == child->matchType()) { + auto ime = static_cast<const InMatchExpression*>(child); + if (QueryPlannerIXSelect::canUseIndexForNin(ime)) { + // Permit documents with an undefined value to be returned from $nin index scan. The + // empty array is represented as undefined in the index but the empty array values + // are filtered out. This is required to match the collection scan (no index) + // behavior. This was later changed by SERVER-21929. + BSONObjBuilder bob; + bob.appendMinKey(""); + bob.appendUndefined(""); + oilOut->intervals.push_back(makeRangeInterval( + bob.asTempObj().getOwned(), BoundInclusion::kIncludeBothStartAndEndKeys)); + bob.resetToEmpty(); + bob.appendNull(""); + bob.appendMaxKey(""); + oilOut->intervals.push_back( + makeRangeInterval(bob.done().getOwned(), BoundInclusion::kIncludeEndKeyOnly)); + unionize(oilOut); + if (index.pathHasMultikeyComponent(elt.fieldNameStringData())) { + *tightnessOut = IndexBoundsBuilder::INEXACT_FETCH; + } + return; + } + } + _translatePredicate(child, elt, index, oilOut, tightnessOut); oilOut->complement(); |