Function ejdb_sys::ejdbqrydistinct

pub unsafe extern "C" fn ejdbqrydistinct(
    jcoll: *mut EJCOLL, 
    fpath: *const c_char, 
    qobj: *mut bson, 
    orqobjs: *mut bson, 
    orqobjsnum: c_int, 
    count: *mut u32, 
    log: *mut TCXSTR
) -> *mut bson

Provides 'distinct' operation over query

(http://docs.mongodb.org/manual/reference/method/db.collection.distinct/).

@param jcoll EJDB database collection handle. @param fpath Field path to collect distinct values from. @param qobj Main BSON query object. @param orqobjs Array of additional OR query objects (joined with OR predicate). @param orqobjsnum Number of OR query objects.

NOTE: Queries with update instruction not supported.

@return Unique values by specified path and query (as BSON array)