Module table (3.20.1)

Define API Tables.

Classes

CloneDefinition

CloneDefinition(resource: typing.Dict[str, typing.Any])

Information about base table and clone time of the clone.

See https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#clonedefinition

Parameter
Name	Description
`resource`	`typing.Dict[str, typing.Any]` Clone definition representation returned from the API.

ColumnReference

ColumnReference(referencing_column: str, referenced_column: str)

The pair of the foreign key column and primary key column.

Parameters
Name	Description
`referencing_column`	`str` The column that composes the foreign key.
`referenced_column`	`str` The column in the primary key that are referenced by the referencingColumn.

ForeignKey

ForeignKey(
    name: str,
    referenced_table: google.cloud.bigquery.table.TableReference,
    column_references: typing.List[google.cloud.bigquery.table.ColumnReference],
)

Represents a foreign key constraint on a table's columns.

Parameters
Name	Description
`name`	`str` Set only if the foreign key constraint is named.
`referenced_table`	`TableReference` The table that holds the primary key and is referenced by this foreign key.
`column_references`	`typing.List[google.cloud.bigquery.table.ColumnReference]` The columns that compose the foreign key.

PartitionRange

PartitionRange(start=None, end=None, interval=None, _properties=None)

Definition of the ranges for range partitioning.

Parameters
Name	Description
`start`	`Optional[int]` Sets the start property.
`end`	`Optional[int]` Sets the end property.
`interval`	`Optional[int]` Sets the interval property.
`_properties`	`Optional[dict]` Private. Used to construct object from API resource.

PrimaryKey

PrimaryKey(columns: typing.List[str])

Represents the primary key constraint on a table's columns.

Parameter
Name	Description
`columns`	`typing.List[str]` The columns that are composed of the primary key constraint.

RangePartitioning

RangePartitioning(range_=None, field=None, _properties=None)

Range-based partitioning configuration for a table.

Parameters
Name	Description
`range_`	`Optional[google.cloud.bigquery.table.PartitionRange]` Sets the range_ property.
`field`	`Optional[str]` Sets the field property.
`_properties`	`Optional[dict]` Private. Used to construct object from API resource.

Row

Row(values, field_to_index)

A BigQuery row.

Values can be accessed by position (index), by key like a dict, or as properties.

Parameters
Name	Description
`values`	`Sequence[object]` The row values
`field_to_index`	`Dict[str, int]` A mapping from schema field names to indexes

RowIterator

RowIterator(
    client,
    api_request,
    path,
    schema,
    page_token=None,
    max_results=None,
    page_size=None,
    extra_params=None,
    table=None,
    selected_fields=None,
    total_rows=None,
    first_page_response=None,
    location: typing.Optional[str] = None,
    job_id: typing.Optional[str] = None,
    query_id: typing.Optional[str] = None,
    project: typing.Optional[str] = None,
    num_dml_affected_rows: typing.Optional[int] = None,
)

A class for iterating through HTTP/JSON API row list responses.

Parameters
Name	Description
`client`	`Optional[google.cloud.bigquery.Client]` The API client instance. This should always be non-`None`, except for subclasses that do not use it, namely the `_EmptyRowIterator`.
`api_request`	`Callable[google.cloud._http.JSONConnection.api_request]` The function to use to make API requests.
`path`	`str` The method path to query for the list of items.
`schema`	`Sequence[Union[ SchemaField, Mapping[str, Any] ]]` The table's schema. If any item is a mapping, its content must be compatible with from_api_repr.
`page_token`	`str` A token identifying a page in a result set to start fetching results from.
`max_results`	`Optional[int]` The maximum number of results to fetch.
`page_size`	`Optional[int]` The maximum number of rows in each page of results from this request. Non-positive values are ignored. Defaults to a sensible value set by the API.
`extra_params`	`Optional[Dict[str, object]]` Extra query string parameters for the API call.
`table`	`Optional[Union[ google.cloud.bigquery.table.Table, google.cloud.bigquery.table.TableReference, ]]` The table which these rows belong to, or a reference to it. Used to call the BigQuery Storage API to fetch rows.
`selected_fields`	`Optional[Sequence[google.cloud.bigquery.schema.SchemaField]]` A subset of columns to select from this table.
`total_rows`	`Optional[int]` Total number of rows in the table.
`first_page_response`	`Optional[dict]` API response for the first page of results. These are returned when the first page is requested.

SnapshotDefinition

SnapshotDefinition(resource: typing.Dict[str, typing.Any])

Information about base table and snapshot time of the snapshot.

See https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#snapshotdefinition

Parameter
Name	Description
`resource`	`typing.Dict[str, typing.Any]` Snapshot definition representation returned from the API.

StreamingBuffer

StreamingBuffer(resource)

Information about a table's streaming buffer.

See https://cloud.google.com/bigquery/streaming-data-into-bigquery.

Parameter
Name	Description
`resource`	`Dict[str, object]` streaming buffer representation returned from the API

Table

Table(table_ref, schema=None)

Tables represent a set of rows whose values correspond to a schema.

See https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#resource-table

Parameters
Name	Description
`table_ref`	`Union[google.cloud.bigquery.table.TableReference, str]` A pointer to a table. If `table_ref` is a string, it must included a project ID, dataset ID, and table ID, each separated by `.`.
`schema`	`Optional[Sequence[Union[ SchemaField, Mapping[str, Any] ]]]` The table's schema. If any item is a mapping, its content must be compatible with from_api_repr.

TableConstraints

TableConstraints(
    primary_key: typing.Optional[google.cloud.bigquery.table.PrimaryKey],
    foreign_keys: typing.Optional[typing.List[google.cloud.bigquery.table.ForeignKey]],
)

The TableConstraints defines the primary key and foreign key.

Parameters
Name	Description
`primary_key`	`typing.Optional[google.cloud.bigquery.table.PrimaryKey]` Represents a primary key constraint on a table's columns. Present only if the table has a primary key. The primary key is not enforced.
`foreign_keys`	`typing.Optional[typing.List[google.cloud.bigquery.table.ForeignKey]]` Present only if the table has a foreign key. The foreign key is not enforced.

TableListItem

TableListItem(resource)

A read-only table resource from a list operation.

For performance reasons, the BigQuery API only includes some of the table properties when listing tables. Notably, xref_schema and xref_num_rows are missing.

For a full list of the properties that the BigQuery API returns, see the REST documentation for tables.list <https://cloud.google.com/bigquery/docs/reference/rest/v2/tables/list>_.

Parameter
Name	Description
`resource`	`Dict[str, object]` A table-like resource object from a table list response. A `tableReference` property is required.

Exceptions
Type	Description
`ValueError`	If `tableReference` or one of its required members is missing from `resource`.

TableReference

TableReference(dataset_ref: DatasetReference, table_id: str)

TableReferences are pointers to tables.

See https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#tablereference

Parameter
Name	Description
`table_id`	`str` The ID of the table

TimePartitioning

TimePartitioning(
    type_=None, field=None, expiration_ms=None, require_partition_filter=None
)

Configures time-based partitioning for a table.

Parameters
Name	Description
`type_`	`Optional[google.cloud.bigquery.table.TimePartitioningType]` Specifies the type of time partitioning to perform. Defaults to DAY. Supported values are: * HOUR * DAY * MONTH * YEAR
`field`	`Optional[str]` If set, the table is partitioned by this field. If not set, the table is partitioned by pseudo column `PARTITIONTIME`. The field must be a top-level `TIMESTAMP`, `DATETIME`, or `DATE` field. Its mode must be `NULLABLE` or `REQUIRED`. See the `time-unit column-partitioned tables guide https://cloud.google.com/bigquery/docs/creating-column-partitions` in the BigQuery documentation.
`expiration_ms`	`Optional[int]` Number of milliseconds for which to keep the storage for a partition.
`require_partition_filter`	`Optional[bool]` DEPRECATED: Use require_partition_filter, instead.

TimePartitioningType

TimePartitioningType()

Specifies the type of time partitioning to perform.