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Diffstat (limited to 'src/mongo/db/query/index_bounds_builder.h')
| -rw-r--r-- | src/mongo/db/query/index_bounds_builder.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/mongo/db/query/index_bounds_builder.h b/src/mongo/db/query/index_bounds_builder.h index b397f81b295..311b3ee61f6 100644 --- a/src/mongo/db/query/index_bounds_builder.h +++ b/src/mongo/db/query/index_bounds_builder.h @@ -70,6 +70,17 @@ public: static void allValuesForField(const BSONElement& elt, OrderedIntervalList* out); /** + * Returns true if 'expr' can correctly be assigned as an INEXACT_COVERED predicate to an index + * scan over 'index'. + * + * The result of this function is not meaningful when the predicate applies to special fields + * such as "hashed", "2d", or "2dsphere". That is, the caller is responsible for ensuring that + * 'expr' is a candidate for covered matching over a regular ascending/descending field of the + * index. + */ + static bool canUseCoveredMatching(const MatchExpression* expr, const IndexEntry& index); + + /** * Turn the MatchExpression in 'expr' into a set of index bounds. The field that 'expr' is * concerned with is indexed according to the keypattern element 'elt' from index 'index'. * |