Method for obtaining information regarding the current activity of a database management system from a viritual table in a memory of the database management system
First Claim
1. In a database management system, a computer implemented method of retrieving information from a virtual table in a memory of a computer system, comprising the steps of:
- a) monitoring current activity in said database management system;
b) storing said information in said virtual table, said information indicating said current activity in said database management system;
c) receiving a value corresponding to said information from a user process specifying said value in a database query language statement;
d) determining a location of said information in said virtual table based on said value;
e) mapping said location to a memory address in said memory at which said information is located;
f) reading said information from said memory beginning at said memory address; and
g) supplying said information to said user process in response to said database query language statement.
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Accused Products
Abstract
A computer implemented method, involving a database management system, retrieves information from a data structure in a memory of a computer system. A user process specifies in a database query language statement a key value used to directly access the information, rather than sequentially searching the entire data structure for the information. A database management system process uses the value to find a location in the data structure at which said information is stored and maps the location in the data structure to a memory address in memory at which the information corresponding to the value is stored. The database management system process retrieves the information from the data structure in memory beginning at the memory address and provides the information to the user process in response to the database query language statement.
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Citations
22 Claims
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1. In a database management system, a computer implemented method of retrieving information from a virtual table in a memory of a computer system, comprising the steps of:
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a) monitoring current activity in said database management system; b) storing said information in said virtual table, said information indicating said current activity in said database management system; c) receiving a value corresponding to said information from a user process specifying said value in a database query language statement; d) determining a location of said information in said virtual table based on said value; e) mapping said location to a memory address in said memory at which said information is located; f) reading said information from said memory beginning at said memory address; and g) supplying said information to said user process in response to said database query language statement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A database management system for retrieving information from a virtual table in a memory of a computer system, the database management system comprising:
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a) means for monitoring current activity in said database management system; b) means for storing said information in said virtual table, said information indicating said current activity in said database management system; c) means for receiving a value corresponding to said information from a user process specifying said value in a database query language statement; d) means for determining a location of said information in said virtual table based on said value; e) means for mapping said location to a memory address in said memory at which said information is located; f) means for reading said information from said memory beginning at said memory address; and g) means for supplying said information to said user process in response to said database query language statement. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification