Class TableFieldSchema (2.32.0)

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TableFieldSchema(mapping=None, *, ignore_unknown_fields=False, **kwargs)

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

Attributes
Name	Description
name	str 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_	google.cloud.bigquery_storage_v1.types.TableFieldSchema.Type Required. The field data type.
mode	google.cloud.bigquery_storage_v1.types.TableFieldSchema.Mode Optional. The field mode. The default value is NULLABLE.
fields	MutableSequence[google.cloud.bigquery_storage_v1.types.TableFieldSchema] Optional. Describes the nested schema fields if the type property is set to STRUCT.
description	str Optional. The field description. The maximum length is 1,024 characters.
max_length	int 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	int 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	int Optional. See documentation for precision.
default_value_expression	str Optional. A SQL expression to specify the [default value] (https://cloud.google.com/bigquery/docs/default-values) for this field.
range_element_type	google.cloud.bigquery_storage_v1.types.TableFieldSchema.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

Classes

FieldElementType

FieldElementType(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Represents the type of a field element.

Mode

Mode(value)

Type

Type(value)