1. A method comprising, by one or more computing devices: receiving, from a client system of a first user of an online social network, a search query input comprising a character string having a first number of characters; accessing one or more verticals, each vertical being external to the client system and storing one or more objects of a particular object-type of a plurality of object types associated with the online social network, wherein: if the first number is less than or equal to a first threshold number, then accessing one or more first verticals, wherein each first vertical stores objects of a first object-type; and if the first number is greater than the first threshold number, then accessing the one or more first verticals and one or more second verticals, wherein each second vertical stores objects of a second object-type different than the first object-type; searching each accessed vertical to identify one or more objects associated with the vertical that substantially match the character string; and sending, to the client system of the first user, one or more references to one or more of the identified objects, respectively.
1. A method comprising, by one or more computing devices: receiving, from a client system of a first user of an online social network, a search query input comprising a character string having a first number of characters; accessing one or more verticals, each vertical being external to the client system and storing one or more objects of a particular object-type of a plurality of object types associated with the online social network, wherein: if the first number is less than or equal to a first threshold number, then accessing one or more first verticals, wherein each first vertical stores objects of a first object-type; and if the first number is greater than the first threshold number, then accessing the one or more first verticals and one or more second verticals, wherein each second vertical stores objects of a second object-type different than the first object-type; searching each accessed vertical to identify one or more objects associated with the vertical that substantially match the character string; and sending, to the client system of the first user, one or more references to one or more of the identified objects, respectively. 14. The method of claim 1 , further comprising: receiving a selection of one of the references from the first user; and sending the object corresponding to the reference to the first user.