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    Synchronization Mechanism for Serialized Data Log Replay in Database Systems
    21.
    发明申请
    Synchronization Mechanism for Serialized Data Log Replay in Database Systems 审中-公开

    公开(公告)号：US20180150540A1

    公开(公告)日：2018-05-31

    申请号：US15409234

    申请日：2017-01-18

    Applicant: SAP SE

    Inventor： Colin Florendo ,  Chaitanya Gottipati ,  Michael Muehle ,  Nirvik Basak ,  Mihnea Andrei ,  Thoms Peh

    IPC: G06F17/30

    Abstract: A computer implemented method for updating a secondary database includes receiving transaction log information from a primary database system at a secondary database system. The transaction log information comprises a first marker identifying a beginning of an operation comprising a plurality of sub-operations and a second marker identifying an end of the operation. The transaction log information is sequentially parsed, a first marker is identified, and a lock state is created after replaying the first marker to ensure proper serialization of the plurality of sub-operations. The lock state is terminated after replaying the second marker. Related apparatus, systems, techniques and articles are also described.

    Paged Inverted Index
    24.
    发明申请
    Paged Inverted Index 审中-公开

    公开(公告)号：US20170154061A1

    公开(公告)日：2017-06-01

    申请号：US14954736

    申请日：2015-11-30

    Applicant: SAP SE

    Inventor： Reza SHERKAT ,  Ivan Schreter ,  Robert Schulze ,  Mihnea Andrei ,  Colin Florendo ,  Christian Lemke ,  Sebastian Seifert

    IPC: G06F17/30 ,  H03M7/30

    CPC classification number: G06F17/30339 ,  G06F17/30336 ,  G06F17/30424 ,  G06F17/30622 ,  H03M7/60

    Abstract: Disclosed herein are system and method embodiments for generating a paged inverted index. An embodiment is generated by storing a first data structure and the second data structure in a plurality of pages, where the plurality of pages are stored in the one or more memories. The first data structure is stored in the plurality of pages and includes a plurality of value identifiers, where a value identifier corresponds to an offset. The second data structure stored in the plurality of pages includes a plurality of row positions, wherein a row position is at a location that corresponds to the offset in the first data structure and identifies a position of row in a table that stores data associated with the value ID.

    UNIFIED PERSISTENCE OVERALL FEATURE
    25.
    发明申请
    UNIFIED PERSISTENCE OVERALL FEATURE 有权

    公开(公告)号：US20250165453A1

    公开(公告)日：2025-05-22

    申请号：US18515731

    申请日：2023-11-21

    Applicant: SAP SE

    Inventor： Janardhan Hungund ,  Amit Pathak ,  Amit Saonerker ,  Deepak Shrivastava ,  Souvik Pal ,  Sebastian Seifert ,  Robert Schulze ,  Mihnea Andrei

    IPC: G06F16/22 ,  G06F16/23

    Abstract: A database system detects an operation to move a first database object from an in-memory store to a persistence store, wherein the first database object is in either a page-loadable or column-loadable format in the in-memory store, and wherein the first database object comprises a plurality of subcomponents. Each subcomponent of the first database object is examined separately from other subcomponents of the plurality of subcomponents. In response to determining that a first subcomponent of the plurality of subcomponents has a datatype and a compression type supported by a unified persistence format, the first subcomponent is stored in a unified persistence format in the persistence store. In response to determining that a second subcomponent of the plurality of subcomponents has either a datatype or a compression type which is not supported by the unified persistence format, the second subcomponent is stored in a serial persistence format in the persistence store.

    Tenant-level database recovery
    26.
    发明授权
    Tenant-level database recovery 有权

    公开(公告)号：US12242359B2

    公开(公告)日：2025-03-04

    申请号：US18185872

    申请日：2023-03-17

    Applicant: SAP SE

    Inventor： Uwe Hahn ,  Eunsang Kim ,  Mihnea Andrei ,  Werner Thesing ,  Patrick Voelker ,  Ruediger Karl ,  Yong Sik Kwon ,  Jaeyoung Choi ,  Jian Luo ,  Hyunjun Kim ,  Andre Schefe ,  Urs Klingsporn ,  Norman May

    IPC: G06F11/00 ,  G06F11/14

    Abstract: Systems and methods include reception of an instruction to recover a first database tenant of a first database instance to a first point in time, the first database tenant associated with first database artifacts of the first database instance, and the first database instance including two or more database tenants and, in response to the instruction, creation of a second database instance, selection of backup data of the first database instance based on the first point in time, execution of a recovery of the backup data on the second database instance, export of second database artifacts of the first database tenant from the second database instance to a storage, truncation of the first database artifacts from the first database instance, import of the second database artifacts from the storage to the first database instance, and deletion of the second database instance.

    Unbalanced partitioning of database for application data
    29.
    发明授权
    Unbalanced partitioning of database for application data 有权

    公开(公告)号：US11567969B2

    公开(公告)日：2023-01-31

    申请号：US15991115

    申请日：2018-05-29

    Applicant: SAP SE

    Inventor： Gerrit Graefe ,  Friedrich Keller ,  Mihnea Andrei

    IPC: G06F16/00 ,  G06F7/00 ,  G06F16/27 ,  G06F3/06 ,  G06F9/50 ,  G06F16/22

    Abstract: Provided is a database system and method in which storage is partitioned in an unbalanced format for faster access. In one example, the method may include one or more of receiving a request to store a data record, identifying a partition from among a plurality of partitions of a database based on a shard identifier in the request, automatically determining a unique range of data identifiers designated to the partition from the plurality of partitions, respectively, based on an unbalanced partitioning, determining whether the data identifier is available within the unique range of data identifiers of the identified partition, and storing the data record at the identified partition in response to determining the data identifier is available. The unbalanced partitioning according to various embodiments reduces the partitions that need to be checked during a data insert/access operation of the database.

    Smart rollover
    30.
    发明授权
    Smart rollover 有权

    公开(公告)号：US11500928B2

    公开(公告)日：2022-11-15

    申请号：US16734907

    申请日：2020-01-06

    Applicant: SAP SE

    Inventor： Panfeng Zhou ,  Mihnea Andrei ,  Vivek Kandiyanallur ,  Xin Liu ,  Neeraj Kulkarni

    IPC: G06F16/835 ,  G06F16/84 ,  G06F16/25 ,  G06F16/174 ,  G06F16/21 ,  G06F16/90 ,  G06F16/907

    Abstract: A system and method, including determining, by a processor, a data type for each column of a database table; determining, by the processor and based on the determined data type for each column of the database table, an indication of a size of the database table; calculating, by the processor and based on the determined indication of the size of the database table, a start nbit size for a nbit compression process to be used on the database table; specifying, by the processor, the calculated start nbit size for the nbit compression process; and compressing the database table by executing the nbit data compression process using the specified start nbit size.

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