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Data Types

Last updated: 2022-02-11 14:58:28

    TencentDB for TcaplusDB supports Protocol Buffers data types.

    Mapping between proto3 and Data Types in Programing Languages

    .proto C++ Java Python Go Ruby C# PHP Dart Notes
    double double double float float64 float double float double -
    float float float float float32 float float float double -
    int32 int32 int int int32 fixnum/
    bignum
    (as required)
    int integer int Uses variable-length encoding.
    Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint32 instead.
    int64 int64 long int/long int64 bignum long integer/
    string
    Int64 Uses variable-length encoding.
    Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint64 instead.
    uint32 uint32 int int/long uint32 fixnum/
    bignum
    (as required)
    uint integer int Uses variable-length encoding.
    uint64 uint64 long int/long uint64 bignum ulong integer/
    string
    Int64 Uses variable-length encoding.
    sint32 int32 int int int32 fixnum/
    bignum
    (as required)
    int integer int Uses variable-length encoding.
    sint64 int64 long int/long int64 bignum long integer/
    string
    Int64 Uses variable-length encoding.
    Signed int value. These more efficiently encode negative numbers than regular int32s.
    fixed32 uint32 int int/long uint32 fixnum/
    bignum
    (as required)
    uint integer int Always four bytes.
    More efficient than uint32 if values are generally greater than 2^28.
    fixed64 uint64 long int/long uint64 bignum ulong integer/
    string
    Int64 Always eight bytes.
    More efficient than uint64 if values are generally greater than 2^56.
    sfixed32 int32 int int int32 fixnum/
    bignum
    (as required)
    int integer int Always four bytes.
    sfixed64 int64 long int/long int64 bignum long integer/
    string
    Int64 Always eight bytes.
    bool bool boolean bool bool trueClass/
    falseClass
    bool boolean bool -
    string string String str/unicode string string
    (UTF -8)
    string string string A string must always contain UTF-8 encoded or 7-bit ASCII text, and cannot be longer than 2^32.
    bytes string ByteString str byte string
    (ASCII-8BIT)
    bytestring string - May contain any arbitrary sequence of bytes no longer than 2^32.

    Mapping between proto2 and Data Types in Programing Languages

    .proto C++ Java Python Go Notes
    double double double float *float64 -
    float float float float *float32 -
    int32 int32 int int *int32 Uses variable-length encoding. Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint32 instead.
    int64 int64 long int/long *int64 Uses variable-length encoding. Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint64 instead.
    uint32 uint32 int int/long *uint32 Uses variable-length encoding.
    uint64 uint64 long int/long *uint64 Uses variable-length encoding.
    sint32 int32 int int *int32 Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.
    sint64 int64 long int/long *int64 Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.
    fixed32 uint32 int int/long *uint32 Always four bytes. More efficient than uint32 if values are generally greater than 2^28.
    fixed64 uint64 long int/long *uint64 Always eight bytes. More efficient than uint64 if values are generally greater than 2^56.
    sfixed32 int32 int int *int32 Always four bytes.
    sfixed64 int64 long int/long *int64 Always eight bytes.
    bool bool boolean bool *bool -
    string string String unicode(Python 2)
    or
    str(Python 3)
    *string A string must always contain UTF-8 encoded or 7-bit ASCII text.
    bytes string ByteString bytes byte May contain any arbitrary sequence of bytes.
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