Struct TableFieldSchema

pub struct TableFieldSchema {
    pub name: String,
    pub type: i32,
    pub mode: i32,
    pub fields: Vec<TableFieldSchema>,
    pub description: String,
    pub max_length: i64,
    pub precision: i64,
    pub scale: i64,
    pub default_value_expression: String,
    pub range_element_type: Option<FieldElementType>,
}

TableFieldSchema defines a single field/column within a table schema.

Fields

name: String

Required. The field name. The name must contain only letters (a-z, A-Z), numbers (0-9), or underscores (_), and must start with a letter or underscore. The maximum length is 128 characters.

type: i32

Required. The field data type.

mode: i32

Optional. The field mode. The default value is NULLABLE.

fields: Vec<TableFieldSchema>

Optional. Describes the nested schema fields if the type property is set to STRUCT.

description: String

Optional. The field description. The maximum length is 1,024 characters.

max_length: i64

Optional. Maximum length of values of this field for STRINGS or BYTES.

If max_length is not specified, no maximum length constraint is imposed on this field.

If type = “STRING”, then max_length represents the maximum UTF-8 length of strings in this field.

If type = “BYTES”, then max_length represents the maximum number of bytes in this field.

It is invalid to set this field if type is not “STRING” or “BYTES”.

precision: i64

Optional. Precision (maximum number of total digits in base 10) and scale (maximum number of digits in the fractional part in base 10) constraints for values of this field for NUMERIC or BIGNUMERIC.

It is invalid to set precision or scale if type is not “NUMERIC” or “BIGNUMERIC”.

If precision and scale are not specified, no value range constraint is imposed on this field insofar as values are permitted by the type.

Values of this NUMERIC or BIGNUMERIC field must be in this range when:

• Precision (P) and scale (S) are specified: [-10^(P-S) + 10^(-S), 10^(P-S) - 10^(-S)]
• Precision (P) is specified but not scale (and thus scale is interpreted to be equal to zero): [-10^P + 1, 10^P - 1].

Acceptable values for precision and scale if both are specified:

• If type = “NUMERIC”: 1 <= precision - scale <= 29 and 0 <= scale <= 9.
• If type = “BIGNUMERIC”: 1 <= precision - scale <= 38 and 0 <= scale <= 38.

Acceptable values for precision if only precision is specified but not scale (and thus scale is interpreted to be equal to zero):

• If type = “NUMERIC”: 1 <= precision <= 29.
• If type = “BIGNUMERIC”: 1 <= precision <= 38.

If scale is specified but not precision, then it is invalid.

scale: i64

Optional. See documentation for precision.

default_value_expression: String

Optional. A SQL expression to specify the [default value] (https://cloud.google.com/bigquery/docs/default-values) for this field.

range_element_type: Option<FieldElementType>

Optional. The subtype of the RANGE, if the type of this field is RANGE. If the type is RANGE, this field is required. Possible values for the field element type of a RANGE include:

• DATE
• DATETIME
• TIMESTAMP

Implementations

impl TableFieldSchema

pub fn type(&self) -> Type

Returns the enum value of type, or the default if the field is set to an invalid enum value.

pub fn set_type(&mut self, value: Type)

Sets type to the provided enum value.

pub fn mode(&self) -> Mode

Returns the enum value of mode, or the default if the field is set to an invalid enum value.

pub fn set_mode(&mut self, value: Mode)

Sets mode to the provided enum value.

Trait Implementations

impl Clone for TableFieldSchema

fn clone(&self) -> TableFieldSchema

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TableFieldSchema

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

Formats the value using the given formatter.

impl Default for TableFieldSchema

fn default() -> Self

Returns the “default value” for a type.

impl Message for TableFieldSchema

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for TableFieldSchema

fn eq(&self, other: &TableFieldSchema) -> 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 StructuralPartialEq for TableFieldSchema