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    Data recalculation and liveliness in applications
    5.
    发明授权
    Data recalculation and liveliness in applications 有权

    公开(公告)号：US11714796B1

    公开(公告)日：2023-08-01

    申请号：US17090755

    申请日：2020-11-05

    Applicant: Amazon Technologies, Inc.

    Inventor： Anupam Srivastava ,  Adrian Kwok ,  Venkata Rao Pedapati ,  Helbert Fonseca Maich

    IPC: G06F16/22 ,  G06F16/2455 ,  G06F16/901 ,  G06F16/25 ,  G06F40/18

    CPC classification number: G06F16/2282 ,  G06F16/24565 ,  G06F16/252 ,  G06F16/9024 ,  G06F40/18

    Abstract: Systems and methods are described to generate reverse dependency lists for cells in a workbook data store. In one aspect, a system populates, for a first cell in the data store, a reverse dependency list identifying a second cell, wherein the second cell comprises a second cell value that depends, at least in part, on a first cell value of the first cell. The system then detects a change to cell information for the first cell, and based on the detected change to the cell information: marks the second cell for recalculation based on the second cell being identified in the reverse dependency list for the first cell and the detected change to the cell information. For each marked cell, the system performs recalculation on the marked cell, performs recalculation recursively on any cells on which the marked cell depends, and stores recalculated cell values in a recalculated cache.

    Multi-table indexing in a spreadsheet based data store
    6.
    发明授权
    Multi-table indexing in a spreadsheet based data store 有权

    公开(公告)号：US11500839B1

    公开(公告)日：2022-11-15

    申请号：US17039968

    申请日：2020-09-30

    Applicant: Amazon Technologies, Inc.

    Inventor： Venkata Rao Pedapati ,  Adrian Kwok ,  Anupam Srivastava ,  Wilfred Xavier Zhi Zhiang Wee ,  Helbert Fonseca Maich

    IPC: G06F16/22 ,  G06F40/18 ,  G06F16/2455 ,  G06F16/93

    Abstract: Aspects are described to generate indexing on columns including links to other columns in a different table. One aspect describes a computer-implemented method comprising identifying, for a workbook comprising a plurality of cells and tables stored in a spreadsheet structure, a query comprising a formula, parsing the formula to identify, as one operand, a heterogeneous column of links in a first table of the plurality of tables to a column in a second table of the plurality of tables and at least one operator, automatically generating a virtual column for the heterogeneous column, the virtual column being inaccessible to a user, storing the generated virtual column, evaluating the function of the virtual column for each row of the first table, generating an inaccessible virtual index for the virtual column, storing the virtual index, and evaluating the formula based on the virtual index to generate a result.

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