Module schema (3.36.0)
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Schemas for BigQuery tables / queries.
Classes
FieldElementType
FieldElementType(element_type:str)Represents the type of a field element.
| Parameter | |
|---|---|
| Name | Description |
element_type | strThe type of a field element. |
ForeignTypeInfo
ForeignTypeInfo(type_system:typing.Optional[str]=None)Metadata about the foreign data type definition such as the system in which thetype is defined.
| Parameter | |
|---|---|
| Name | Description |
type_system | strRequired. Specifies the system which defines the foreign data type. TypeSystem enum currently includes: * "TYPE_SYSTEM_UNSPECIFIED" * "HIVE" |
PolicyTagList
PolicyTagList(names:typing.Iterable[str]=())Define Policy Tags for a column.
SchemaField
SchemaField(name:str,field_type:str,mode:str="NULLABLE",default_value_expression:typing.Optional[str]=None,description:typing.Union[str,google.cloud.bigquery.schema._DefaultSentinel]=_DefaultSentinel.DEFAULT_VALUE,fields:typing.Iterable[google.cloud.bigquery.schema.SchemaField]=(),policy_tags:typing.Union[google.cloud.bigquery.schema.PolicyTagList,None,google.cloud.bigquery.schema._DefaultSentinel,]=_DefaultSentinel.DEFAULT_VALUE,precision:typing.Union[int,google.cloud.bigquery.schema._DefaultSentinel]=_DefaultSentinel.DEFAULT_VALUE,scale:typing.Union[int,google.cloud.bigquery.schema._DefaultSentinel]=_DefaultSentinel.DEFAULT_VALUE,max_length:typing.Union[int,google.cloud.bigquery.schema._DefaultSentinel]=_DefaultSentinel.DEFAULT_VALUE,range_element_type:typing.Optional[typing.Union[google.cloud.bigquery.schema.FieldElementType,str]]=None,rounding_mode:typing.Optional[typing.Union[google.cloud.bigquery.enums.RoundingMode,str]]=None,foreign_type_definition:typing.Optional[str]=None,)Describe a single field within a table schema.
SerDeInfo
SerDeInfo(serialization_library:str,name:typing.Optional[str]=None,parameters:typing.Optional[dict[str,str]]=None,)Serializer and deserializer information.
| Parameters | |
|---|---|
| Name | Description |
serialization_library | strRequired. Specifies a fully-qualified class name of the serialization library that is responsible for the translation of data between table representation and the underlying low-level input and output format structures. The maximum length is 256 characters. |
name | Optional[str]Name of the SerDe. The maximum length is 256 characters. |
StorageDescriptor
StorageDescriptor(input_format:typing.Optional[str]=None,location_uri:typing.Optional[str]=None,output_format:typing.Optional[str]=None,serde_info:typing.Optional[typing.Union[google.cloud.bigquery.schema.SerDeInfo,dict]]=None,)Contains information about how a table's data is stored and accessed by opensource query engines.
| Parameters | |
|---|---|
| Name | Description |
input_format | Optional[str]Specifies the fully qualified class name of the InputFormat (e.g. "org.apache.hadoop.hive.ql.io.orc.OrcInputFormat"). The maximum length is 128 characters. |
location_uri | Optional[str]The physical location of the table (e.g. 'gs://spark-dataproc-data/pangea-data/case_sensitive/' or 'gs://spark-dataproc-data/pangea-data/'). The maximum length is 2056 bytes. |
output_format | Optional[str]Specifies the fully qualified class name of the OutputFormat (e.g. "org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat"). The maximum length is 128 characters. |
serde_info | Union[SerDeInfo, dict, None]Serializer and deserializer information. |
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Last updated 2025-12-16 UTC.