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    Built-in Types

    The following built-in types are provided:

    CDS Type Arguments / Remarks Example Value SQL (6)
    UUID an opaque 36-characters string (1) 'be071623-8699-4106-b6fa-8e3cb04c261e' NVARCHAR(36)
    Boolean   true BOOLEAN
    UInt8 (2) 133 TINYINT
    Int16   1337 SMALLINT
    Int32   1337 INTEGER
    Integer   1337 INTEGER
    Int64   1337 BIGINT
    Integer64   1337 BIGINT
    Decimal ( precision, scale ) (3) 15.2 DECIMAL
    Double   15.2 DOUBLE
    Date   '2021-06-27' DATE
    Time   '07:59:59' TIME
    DateTime sec precision '2021-06-27T14:52:23Z' TIMESTAMP
    Timestamp 0.1 µs precision (4) '2021-06-27T14:52:23.123Z' TIMESTAMP
    String ( length ) (5) 'hello world' NVARCHAR
    Binary ( length ) (5)   VARBINARY
    LargeBinary     BLOB
    LargeString   'hello world' NCLOB


    (1) At runtime, UUIDs are treated as opaque values and are, for example, not converted to lower case on input. UUIDs generated in the application are RFC 4122-compliant. See Don’t Interpret UUIDs! for details.

    (2) Not supported on PostgreSQL, as there is no TINYINT. Not supported on H2, as TINYINT is signed on H2. Use Int16 instead.

    (3) Arguments precision and scale are optional → if omitted a decfloat type is used

    (4) Up to 7 digits of fractional seconds; if a data is given with higher precision truncation may occur

    (5) Argument length is optional → use options cds.cdsc.defaultStringLength and cds.cdsc.defaultBinaryLength to control the project-specific default length used for OData and SQL backends. If not set, the global default length 5000 is used for SQL backends.

    (6) Mapping to ANSI SQL types are given for comparison. Note though, that you need to have the specification of your target database in mind when considering, for example, length restrictions.

    See also…

    Mapping to OData EDM types

    HANA-native Data Types