RUNTIME QUERY MODIFICATION IN DATA STREAM MANAGEMENT

A query may execute on stored original stream data obtained from stream data received from at least one data source. The original stream data may be deleted in association with new stream data being received. At least one operator of the query may be duplicated to obtain at least one duplicated operator, and the stored original stream data may be duplicated to obtain duplicated stream data. The at least one duplicated operator may be modified to obtain at least one modified operator and, thereby, a modified query. Original results may be determined based on execution of the at least one operator, and modified results may be determined based on execution of the at least one modified operator. The at least one operator and the original stream data may be replaced with the at least one duplicated operator and the duplicated stream data, to thereby obtain an integrated query for execution.