Abstract: A data providing apparatus includes circuitry configured to store a query as a candidate query in a first memory in association with an execution plan and store data in a second memory when receiving the execution plan and the data from a database server in response to transmitting the query to the database server, perform searching the first memory for a first candidate query having content corresponding to content of a first query in response to receiving the first query from a first request source, when the first candidate query is detected by the searching, select a first execution plan associated with the first candidate query by referring to the first memory, extract specific data from the second memory on the basis of the selected first execution plan, and transmit the specific data to the first request source.

Abstract: A data providing apparatus includes circuitry configured to store a query as a candidate query in a first memory in association with an execution plan and store data in a second memory when receiving the execution plan and the data from a database server in response to transmitting the query to the database server, perform searching the first memory for a first candidate query having content corresponding to content of a first query in response to receiving the first query from a first request source, when the first candidate query is detected by the searching, select a first execution plan associated with the first candidate query by referring to the first memory, extract specific data from the second memory on the basis of the selected first execution plan, and transmit the specific data to the first request source.

Abstract: A connection request from a client is received to distribute one communication within a series of communications to any of a plurality of relay devices, which can relay the one communication, in correspondence with the connection request from the side of the client. Whether or not a connection corresponding to the series of communications is established is determined according to an identifier written in the request. If the connection is established, the requested communication is connected to a relay device as a relay destination of the established connection.

Abstract: A connection request from a client is received to distribute one communication within a series of communications to any of a plurality of relay devices, which can relay the one communication, in correspondence with the connection request from the side of the client. Whether or not a connection corresponding to the series of communications is established is determined according to an identifier written in the request. If the connection is established, the requested communication is connected to a relay device as a relay destination of the established connection.

Abstract: A server capable of uninterrupted operation. When access from a client has occurred, session specification information generating means generates a session ID specifying the session of this client, and supplies the generated session ID to definition information supply means and association information generating means. The association information generating means looks up the date and time generated by a timer to specify applicable definition information, and also generates association information that associates the definition information with the session ID, the association information being stored in association information storing means.