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Cursor
(
connection
)
DB-API Cursor to Google BigQuery.
Parameter
| Name | Description |
| connection | Connection
A DB-API connection to Google BigQuery. |
Inheritance
builtins.object > CursorMethods
close
close
()
No-op.
execute
execute
(
operation
,
parameters
=
None
,
job_id
=
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
| Name | Description |
| operation | str
A Google BigQuery query string. |
| parameters | Mapping[str, Any] or 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. |
executemany
executemany
(
operation
,
seq_of_parameters
)
Prepare and execute a database operation multiple times.
| Name | Description |
| operation | str
A Google BigQuery query string. |
fetchall
fetchall
()
Fetch all remaining results from the last execute*()
call.
| Type | Description |
| InterfaceError | if called before ``execute()``. |
| Type | Description |
| List[tuple] | A list of all the rows in the results. |
fetchmany
fetchmany
(
size
=
None
)
Fetch multiple results from the last execute*()
call.
.. note::
The size parameter is not used for the request/response size.
Set the arraysize
attribute before calling execute()
to
set the batch size.
| Name | Description |
| size | int
(Optional) Maximum number of rows to return. Defaults to the |
| Type | Description |
| InterfaceError | if called before ``execute()``. |
| Type | Description |
|---|---|
| List[tuple] | A list of rows. |
fetchone
fetchone
()
Fetch a single row from the results of the last execute*()
call.
| Type | Description |
| InterfaceError | if called before ``execute()``. |
| Type | Description |
| tuple | A tuple representing a row or ``None`` if no more data is available. |
setinputsizes
setinputsizes
(
sizes
)
No-op.
setoutputsize
setoutputsize
(
size
,
column
=
None
)
No-op.
