1. A computer-implemented method, comprising: receiving, by a computer system configured to execute computer-executable instructions, a continuous query, the continuous query being identified based at least in part on an archived relation associated with an application; generating a physical query plan for the continuous query; identifying a query operator in the physical query plan; constructing an archiver query for the identified query operator; executing the archiver query to obtain a result set of data records related to the application; initializing a state of the query operator based at least in part on the result set of data records; and generating a snapshot output of one or more data values related to the application based at least in part on the state of the identified query operator.