Delayed delivery of query results or other data from a federated server to a federated client until such information is needed

• US 6,466,933 B1
• Filed: 09/21/1999
• Issued: 10/15/2002
• Est. Priority Date: 09/21/1999
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Lee, Taejae, Vo, Mimi Phuong-Thao, Summers, Robert Nelson, Huang, Mei-Ing W., Soetarman, Basuki N.
• Primary Examiner(s): Vu, Kim
• Assistant Examiner(s): Pham, Hung Q
• Application Number:
  US09/399,697
• Time in Patent Office: 1,120 Days
• Field of Search: 707/3, 707/10, 707/1, 707/4, 707/5
• US Class Current: 707/759
• CPC Class Codes: G06F 16/2435 Active constructs
• CPC Class Codes: G06F 16/256 in federated or virtual databases
• CPC Class Codes: Y10S 707/955 Object-oriented
• CPC Class Codes: Y10S 707/959 Network
• CPC Class Codes: Y10S 707/99931 Database or file accessing
• CPC Class Codes: Y10S 707/99933 Query processing, i.e. searching
• CPC Class Codes: Y10S 707/99934 Query formulation, input preparation, or translation
• CPC Class Codes: Y10S 707/99935 Query augmenting and refining, e.g. inexact access

Abstract

A technique for delayed delivery of query results or other data from a federated server to a federated client until such information is needed. One or more commands are executed at a client computer to retrieve data from one or more datastores connected to a server computer. At the client computer, a search request is transmitted to the server computer. Then, a client collection is generated for use in retrieving physical data from the server computer. When data is requested using the client collection, physical data is retrieved from the server computer.

Claims

1. A method of executing one or more commands at a client computer to retrieve data from one or more datastores connected to a server computer, the method comprising the steps of:

at the client computer,

transmitting a search request to the server computer; and

generating a client collection for use in retrieving physical data from the server computer; and

at the server computer, generating a server collection with the same structure as the client collection, for use in retrieving the physical data, from the one or more datastores, based on the search request;

wherein;

the generating of the client collection is performed without providing the client collection the physical data,

the generating of the server collection is performed so as to include retrieving at least part of the physical data from the one or more datastores, the physical data being represented by an object oriented (OO) object, and

the client collection is provided with a part of the physical data, from the server collection, only when the part of the physical data is requested using the client collection.

2. The method of claim 1, wherein the client collection comprises one or more objects and further comprising iterating through objects in the client collection.

3. The method of claim 1, wherein the client collection comprises one or more objects and further comprising retrieving physical data for selected objects.

4. The method of claim 1, further comprising retrieving member data.

5. The method of claim 1, further comprising retrieving content data.

6. The method of claim 1, wherein an application program resides at the client computer and requests data from the server computer.

7. An apparatus for retrieving data from one or more datastores, comprising:

a client computer connected to a server computer;

a server computer having one or more datastores coupled thereto; and

one or more computer programs of the computers, for;

at the client computer,

transmitting a search request to the server computer; and

generating a client collection for use in retrieving physical data from the server computer; and

at the server computer, generating a server collection with the same structure as the client collection, for use in retrieving the physical data, from the one or more datastores, based on the search request;

wherein;

the generating of the client collection is performed without providing the client collection the physical data,

the generating of the server collection is performed so as to include retrieving at least part of the physical data from the one or more datastores, the physical data being represented by an object oriented (OO) object, and

the client collection is provided with a part of the physical data, from the server collection, only when the part of the physical data is requested using the client collection.

8. The apparatus of claim 7, wherein the client collection comprises one or more objects and further comprising iterating through objects in the client collection.

9. The apparatus of claim 7, wherein the client collection comprises one or more objects and further comprising retrieving physical data for selected objects.

10. The apparatus of claim 7, further comprising retrieving member data.

11. The apparatus of claim 7, further comprising retrieving content data.

12. The apparatus of claim 7, wherein an application program resides at the client computer and requests data from the server computer.

13. An article of manufacture comprising a program storage medium readable by a client computer and embodying one or more instructions executable by the client computer to perform method steps for retrieving data from one or more datastores connected to a server computer, the method comprising the steps of:

at the client computer,

transmitting a search request to the server computer; and

generating a client collection for use in retrieving physical data from the server computer; and

at the server computer, generating a server collection with the same structure as the client collection, for use in retrieving the physical data, from the one or more datastores, based on the search request;

wherein;

the generating of the client collection is performed without providing the client collection the physical data,

the generating of the server collection is performed so as to include retrieving at least part of the physical data from the one or more datastores, the physical data being represented by an object oriented (OO) object, and

the client collection is provided with a part of the physical data, from the server collection, only when the part of the physical data is requested using the client collection.

14. The article of manufacture of claim 13, wherein the client collection comprises one or more objects and further comprising iterating through objects in the client collection.

15. The article of manufacture of claim 13, wherein the client collection comprises one or more objects and further comprising retrieving physical data for selected objects.

16. The article of manufacture of claim 13, further comprising retrieving member data.

17. The article of manufacture of claim 13, further comprising retrieving content data.

18. The article of manufacture of claim 13, wherein an application program resides at the client computer and requests data from the server computer.