Abstract: In one embodiment, a method includes accessing a social graph that includes a plurality of nodes and edges, receiving from a user a structured query comprising references to selected nodes and selected edges, generating a query command based on the structured query based on the structured query comprising a first query constraint and a second query constraint, identifying a first set of nodes matching the first query constraint and at least in part matching the second query constraint, identifying a second set of nodes matching the second query constraint, and generating search results based on the first and second set of nodes.

Abstract: In one embodiment, a method includes receiving, from a client device of a first user of an online social network, a structured query comprising references to one or more selected objects associated with the online social network, parsing the structured query to identify a first query constraint and one or more second query constraints, identifying an inverse constraint associated with the first query constraint, wherein the first query constraint has been previously flagged as identifying greater than a threshold number of objects, and generating a query command based on the structured query, wherein the query command comprises the inverse constraint and the one or more second query constraints.

Abstract: In one embodiment, a method includes receiving from a first user of an online social network a search query, searching data stores to identify objects that match the search query, where identifying the objects is also based in part on the privacy setting for each object, determining for each identified object a visibility of the object with respect to the first user, and generating one or more search results corresponding to the search query.

Abstract: In one embodiment, a method includes receiving, from a client system of a first user of an online social network, a structured query comprising references to one or more selected objects associated with the online social network, generating a query command based on the structured query, wherein the query command comprises an inner query constraint and an outer query constraint, identifying a first set of objects matching the inner query constraint and at least in part matching the outer query constraint, identifying a second set of objects matching the outer query constraint, and generating one or more search results based on the first and second sets of objects, wherein each search result corresponds to an object of the plurality of objects.

Abstract: In one embodiment, a method includes receiving from a first user of an online social network a search query, searching data stores to identify objects that match the search query, where identifying the objects is also based in part on the privacy setting for each object, determining for each identified object a visibility of the object with respect to the first user, and generating one or more search results corresponding to the search query.

Abstract: In one embodiment, a method includes accessing a social graph that includes a plurality of nodes and edges, receiving from a user a structured query comprising references to selected nodes and selected edges, parsing the structure query to identify a first query constraint and one or more second query constraints, identifying a inverse constraint associated with the first query constraint, and generating a query command based on the structured query, where the query command includes the inverse constraint and the one or more second query constraints.

Abstract: In one embodiment, a method includes accessing a social graph that includes a plurality of nodes and edges, receiving from a user a structured query comprising references to selected nodes and selected edges, generating a query command based on the structured query based on the structured query comprising a first query constraint and a second query constraint, identifying a first set of nodes matching the first query constraint and at least in part matching the second query constraint, identifying a second set of nodes matching the second query constraint, and generating search results based on the first and second set of nodes.

Abstract: In one embodiment, a method includes accessing a social graph comprising a plurality of nodes and edges, receiving a set of scored results from a user that include results generated by a search algorithm in response to a query from the user and a score for each result, where each result corresponds to a node of the social graph, calculating a gain for each result based on the score of the result, and modifying the search algorithm based on the calculated gain.