Enum Type

pub enum Type {
    Bool,
    Int64,
    Float64,
    String,
    Bytes,
    Json,
    Numeric,
    Timestamp,
    Date,
    Array(Box<Type>),
    Struct(StructType),
}

An enumeration of all Cloud Spanner data types.

Refer to the Cloud Spanner documentation for detailed information about individual data types.

Variants

Bool

The BOOL data type.

• Storage size: 1 byte

Int64

The INT64 data type.

• Storage size: 8 bytes
• Range: -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

Float64

The FLOAT64 data type.

Supports the special NaN, +inf and -inf values.

• Storage size: 8 bytes

String

The STRING data type.

Must be valid UTF-8.

• Storage: the number of bytes in its UTF-8 encoding

Bytes

The BYTES data type.

• Storage: the number of bytes

Json

The JSON data type.

Note that the JSON document will be canonicalized before storing. Refer to the Cloud Spanner for details.

• Storage: The number of bytes in UTF-8 encoding of the JSON-formatted string equivalent after canonicalization.

Numeric

The NUMERIC data type.

• Storage: varies between 6 and 22 bytes, except for the value 0 which uses 1 byte.

Timestamp

The TIMESTAMP data type.

Refer to the Cloud Spanner documentation for details on timezones and format when used in SQL statements.

• Storage: 12 bytes
• Range: 0001-01-01 00:00:00 to 9999-12-31 23:59:59.999999999 UTC.

Date

The DATE data type.

• Storage: 4 bytes
• Range: 0001-01-01 to 9999-12-31.
• Canonical format: YYYY-[M]M-[D]D

Array(Box<Type>)

The ARRAY data type. Can contain elements of any other type except Array (i.e.: arrays of arrays are not allowed). Can contain NULL elements. A NULL value of type array and an empty array are different values.

• Storage: the sum of the size of its elements

Tuple Fields

0: Box<Type>

The array’s element type.

Struct(StructType)

The STRUCT data type.

Implementations

impl Type

pub fn array(inner: Type) -> Self

Creates a new Type::Array with elements of the specified type.

Panics

If the provided type is itself an Type::Array.

pub fn strct(fields: Vec<(&str, Type)>) -> Self

Creates a new Type::Struct with the provided field names and types.

Trait Implementations

impl Clone for Type

fn clone(&self) -> Type

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Type

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&Type> for Type

fn from(value: &Type) -> Self

Converts to this type from the input type.

impl From<Type> for Type

fn from(value: Type) -> Self

Converts to this type from the input type.

impl PartialEq for Type

fn eq(&self, other: &Type) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<&Type> for Type

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &Type) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Type> for Type

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Type) -> Result<Self, Self::Error>

Performs the conversion.

impl StructuralPartialEq for Type