Shivani Revoc Gupta, 52Irvine, CA

6430550, Aug 6, 2002

Dec 3, 1999

09/455004

John Leo - Palo Alto CA
Cetin Ozbutun - San Carlos CA
William H. Waddington - Foster City CA
Shivani Gupta - Mountain View CA

Oracle Corporation - Redwood Shores CA

G06F 1730

707 2, 707 3, 707 10

Techniques are provided for executing distinct aggregation operations in a manner that is more scalable and efficient than prior techniques. A three-stage technique is provided to parallelize aggregation operations that involve both grouping and multiple distinct-key columns. Such queries are handled by splitting rows into as many pieces as there are distinct aggregates in the query, and processing the row pieces. During the first-stage, a set of slave processes scans the rows of the base tables and performs partial duplicate elimination. During the second-stage, a set of slave processes completes the duplicate elimination and performs partial set function aggregation. During the third-stage, a third set of slave processes completes the set aggregation to produce the results of the distinct aggregation operation. In addition, two-stage parallelization techniques are provided for parallelizing single-distinct aggregations, and for parallelizing distinct aggregation operations that involve multiple distinct-key columns, but do not require grouping.

6438562, Aug 20, 2002

Aug 24, 1999

09/379625

Shivani Gupta - Mountain View CA
William H. Waddington - Foster City CA
Benoit Dageville - Redwood Shores CA

Oracle Corporation - Redwood Shores CA

G06F 1730

707201, 707202

A method, system and product for coordinating a parallel update for a global index of an indexed table involves a coordinator process and slave processes. The coordinator process receives index maintenance records from data manipulation slaves for an indexed table. Each index maintenance record includes a value for an index key of a global index of the table. The coordinator process computes index key value ranges and sends each range to an index update slave. Each slave updates the global index using just the index maintenance records with key values in its respective range, thus avoiding contention among the slaves and increasing clustering so that scaleable parallelism may be more closely attained. Techniques are also described for deferring the maintenance of global indexes relative to the time when the table on which they are built is changed.

6828851, Dec 7, 2004

Oct 31, 2002

10/286096

Bumha Lee - Mountain View CA
Shivani Gupta - Milpitas CA
Christina Phan - San Jose CA

National Semiconductor Corporation - Santa Clara CA

G05F 1575

327537, 327536, 327554, 363 60

A charge-pump circuit generates a constant voltage higher than the available power supply. A feedback path maintains the voltage at a constant level in spite of power supply, temperature and process variations. This charge pump circuit includes a switched capacitor interface arranged to generate a target voltage that is used to activate and deactivate a bypass capacitor interface to maintain the constant voltage. The bypass capacitor interface is configured to complete the feedback path. The feedback helps to ensure that node n1, that is coupled to the output of the charge pump, stays at a constant potential, irrespective of the power supply voltage.

6864920, Mar 8, 2005

Aug 24, 2001

09/939217

Willem J. Kindt - Sunnyvale CA, US
Christina P. Phan - San Jose CA, US
Shivani Gupta - Milpitas CA, US

Eastman Kodak Company - Rochester NY

H04N005/335

348308

A circuit and method for increasing the dynamic range of CMOS image sensors designed with a thin gate oxide layer. The circuit includes a high voltage supply circuit and a high voltage level shifter circuit. The high voltage supply circuit is configured to supply a voltage to the shifter circuit. The voltage has a voltage level higher than the maximum supply voltage of the associated fabrication process. The shifter circuit is configured to output a high reset signal based on a reset signal generated to reset a pixel circuit of a pixel array. Instead of the reset signal, the high reset signal is coupled to a gate of the reset transistor in the pixel circuit. The high reset signal allows the reset transistor to maintain a gate to source potential less than the maximum supply voltage even when the high reset signal is greater than the maximum supply voltage.

7673291, Mar 2, 2010

Feb 9, 2004

10/775531

Karl Dias - Foster City CA, US
Shivani Gupta - Los Altos CA, US
Mark Ramacher - San Carlos CA, US
Uri Shaft - Castro Valley CA, US
Venkateshwaran Venkataramani - Foster City CA, US
Graham S. Wood - El Granada CA, US
Juan Loaiza - Redwood City CA, US

Oracle International Corporation - Redwood Shores CA

G06F 9/44
G06F 12/00
G06F 11/00

717127, 717124, 707200, 714 38

Techniques for self-diagnosing performance problems in a database are provided. The techniques include classifying one or more performance problems in a database system. One or more values for quantifying an impact of the one or more performance problems on the database system are then determined. The quantified values are determined based on the performance of operations in the database system. A performance problem based on the one or more quantified values is then determined. A solution for the performance problem is generated and may be outputted.

8024301, Sep 20, 2011

Aug 11, 2004

10/916695

Karl Dias - Foster City CA, US
Graham S. Wood - El Granada CA, US
Shivani Gupta - Los Altos CA, US
Sushil Kumar - San Jose CA, US
Mark Ramacher - San Carlos CA, US
Uri Shaft - Castro Valley CA, US
Leng Leng Tan - Sunnyvale CA, US
Venkateshwaran Venkataramani - Redwood City CA, US

Oracle International Corporation - Redwood Shores CA

G06F 7/00

707688, 707792

One or more usage models are provided for a database. Each usage model includes a set of rules that are used to analyze database performance. A usage model in one or more usage models is determined. Database information is determined based on the usage model. The database information is then analyzed based on rules associated with the usage model. One or more performance problems are determined based on the analysis.

6380791, Apr 30, 2002

May 16, 2000

09/572022

Shivani Gupta - Milpitas CA
Christina Phan - San Jose CA

National Semiconductor Corporation - Santa Clara CA

G05F 110

327382, 327538

An integrated circuit having at least one segmented array of switches, wherein the root node of each segmented array of switches is a node whose potential varies with time during operation. Each segmented switch array includes switches connected between nodes having a tree structure. The nodes include the root node and additional nodes of at least two different degrees relative to the root node. By providing a segmented array (rather than a non-segmented array) of switches at a node, the total load capacitance (including parasitic capacitance) at the node is reduced in accordance with the invention. In preferred embodiments, the invention is an analog integrated circuit having a first node at which the potential varies rapidly, and a segmented array of switches whose root node is the first node. Another aspect of the invention is a method for designing an integrated circuit to have reduced load capacitance (e. g. , load capacitance due to parasitic capacitance) at at least one sensitive node, including the steps of identifying a sensitive node of a preliminary design for the circuit, wherein an array of switches is coupled to the sensitive node; and determining a refined design for the circuit in which the array is replaced by a segmented switch array comprising switches connected between nodes having a tree structure, wherein the nodes include a root node, and the root node is the sensitive node.

2021036, Nov 25, 2021

May 21, 2021

17/327397

- Santa Clara CA, US
Brett Phillip James Lawson - Surrey, CA
Matthew William Ingenthron - Huntington Beach CA, US
David John Finlay - Mountain View CA, US
Shivani Gupta - Irvine CA, US
John Sae Liang - Palo Alto CA, US
Stephen Ching-Sing Yen - Atherton CA, US

G06F 16/23
G06F 9/54
G06F 16/27

Client systems of a distributed database system execute transactions on data stored within the distributed database system. The client systems communicate directly with database nodes of the distributed database system in order to execute transactions. The client systems interact with the database nodes of the distributed database system via a client-side interface that performs various operations to execute transactions at the distributed database nodes, including retrieving records, staging mutations or insertions, committing mutations or insertions, or rolling back mutations or insertions on records stored on the distributed database nodes. Interactions between the client-side interface and the database nodes of the distributed database system are further configured to prevent conflicts between different transactions executed by one or more client systems at the database nodes.