Using Inverse Operators for Queries

One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

• receive, from a client system of a first user, a query comprising one or more n-grams;
• generate a plurality of query commands based on a parsing of the query input, wherein each query command comprises a plurality of query constraints;
• score the plurality of query commands based at least in part on a number of objects matching each of the query constraints of the respective query command;
• select, from the plurality of query commands, a first query command based at least in part on the respective scores of the query commands, wherein the first query command comprises:
• an inverse constraint corresponding to a first query constraint that has previously been flagged as identifying greater than a threshold number of objects;
• and
• one or more second query constraints;
• and
• execute the first query command to identify a plurality of objects matching the inverse constraint and the one or more second query constraints.

A system comprising:

• one or more processors;
• and a memory coupled to the processors comprising instructions executable by the processors, the processors operable when executing the instructions to:
• receive, from a client system of a first user, a query comprising one or more n-grams;
• generate a plurality of query commands based on a parsing of the query input, wherein each query command comprises a plurality of query constraints;
• score the plurality of query commands based at least in part on a number of objects matching each of the query constraints of the respective query command;
• select, from the plurality of query commands, a first query command based at least in part on the respective scores of the query commands, wherein the first query command comprises:
• an inverse constraint corresponding to a first query constraint that has previously been flagged as identifying greater than a threshold number of objects;
• and
• one or more second query constraints;
• and
• execute the first query command to identify a plurality of objects matching the inverse constraint and the one or more second query constraints.