Data compression in sap hana

  • How do I compress a table in Hana?

    It is also possible to compress a table in SAP HANA system manually by executing the following SQL statement.
    This results in deciding whether a compression is required or an existing compression can be optimized.
    In this scenario, HANA system uses most suitable compression algorithm..

  • Since HANA does perform compression optimisation - that is, it tries to find the best compression algorithm for every column in a table, given all other columns - this might have changed after the re-partitioning.
Compression is calculated using Compression factor. Compression factor refers to the ratio of the uncompressed data size to the compressed data size in SAP HANA. In SAP HANA, Compression is performed and calculations are done as part of the delta merge operation.

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