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Showing content from https://cloud.google.com/python/docs/reference/bigquery/2.10.0/google.cloud.bigquery.dbapi.Cursor below:

Class Cursor (2.10.0) | Python client library

Class Cursor (2.10.0)

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DB-API Cursor to Google BigQuery.

Parameter

Inheritancebuiltins.object > Cursor

Methods close

Mark the cursor as closed, preventing its further use.

execute
execute(operation, parameters=None, job_id=None, job_config=None)

Prepare and execute a database operation.

Note: When setting query parameters, values which are "text" (unicode in Python2, str in Python3) will use the 'STRING' BigQuery type. Values which are "bytes" (str in Python2, bytes in Python3), will use using the 'BYTES' type.

A

datetime.datetime

parameter without timezone information uses the 'DATETIME' BigQuery type (example: Global Pi Day Celebration March 14, 2017 at 1:59pm). A

datetime.datetime

parameter with timezone information uses the 'TIMESTAMP' BigQuery type (example: a wedding on April 29, 2011 at 11am, British Summer Time).

For more information about BigQuery data types, see:
https://cloud.google.com/bigquery/docs/reference/standard-sql/data-types

``STRUCT``/``RECORD`` and ``REPEATED`` query parameters are not
yet supported. See:
https://github.com/GoogleCloudPlatform/google-cloud-python/issues/3524
Parameters Name Description operation str

A Google BigQuery query string.

parameters Union[Mapping[str, Any], Sequence[Any]]

(Optional) dictionary or sequence of parameter values.

job_id str

(Optional) The job_id to use. If not set, a job ID is generated at random.

job_config google.cloud.bigquery.job.QueryJobConfig

(Optional) Extra configuration options for the query job.

executemany
executemany(operation, seq_of_parameters)

Prepare and execute a database operation multiple times.

Parameters Name Description operation str

A Google BigQuery query string.

seq_of_parameters Union[Sequence[Mapping[str, Any], Sequence[Any]]]

Sequence of many sets of parameter values.

fetchall

Fetch all remaining results from the last execute*() call.

Note: If a dry run query was executed, no rows are returned. Exceptions Returns Type Description List[Tuple] A list of all the rows in the results. fetchmany

Fetch multiple results from the last execute*() call.

Note: If a dry run query was executed, no rows are returned. Note: The size parameter is not used for the request/response size. Set the arraysize attribute before calling execute() to set the batch size. Parameter Name Description size int

(Optional) Maximum number of rows to return. Defaults to the arraysize property value. If arraysize is not set, it defaults to 1.

Exceptions Returns Type Description List[Tuple] A list of rows. fetchone

Fetch a single row from the results of the last execute*() call.

Note: If a dry run query was executed, no rows are returned. Exceptions Returns Type Description Tuple A tuple representing a row or ``None`` if no more data is available. setinputsizes

No-op, but for consistency raise an error if cursor is closed.

setoutputsize
setoutputsize(size, column=None)

No-op, but for consistency raise an error if cursor is closed.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-07 UTC.

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