Class PartitionQueryRequest (3.31.0) 

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

The request for PartitionQuery][google.spanner.v1.Spanner.PartitionQuery]

Attributes

NameDescription
session str
Required. The session used to create the partitions.
transaction google.cloud.spanner_v1.types.TransactionSelector
Read only snapshot transactions are supported, read/write and single use transactions are not.
sql str
Required. The query request to generate partitions for. The request will fail if the query is not root partitionable. The query plan of a root partitionable query has a single distributed union operator. A distributed union operator conceptually divides one or more tables into multiple splits, remotely evaluates a subquery independently on each split, and then unions all results. This must not contain DML commands, such as INSERT, UPDATE, or DELETE. Use ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] with a PartitionedDml transaction for large, partition-friendly DML operations.
params google.protobuf.struct_pb2.Struct
Parameter names and values that bind to placeholders in the SQL string. A parameter placeholder consists of the @ character followed by the parameter name (for example, @firstName). Parameter names can contain letters, numbers, and underscores. Parameters can appear anywhere that a literal value is expected. The same parameter name can be used more than once, for example: "WHERE id > @msg_id AND id < @msg_id="" +=""> It is an error to execute a SQL statement with unbound parameters.
param_types MutableMapping[str, google.cloud.spanner_v1.types.Type]
It is not always possible for Cloud Spanner to infer the right SQL type from a JSON value. For example, values of type BYTES and values of type STRING both appear in params][google.spanner.v1.PartitionQueryRequest.params] as JSON strings. In these cases, param_types can be used to specify the exact SQL type for some or all of the SQL query parameters. See the definition of Type][google.spanner.v1.Type] for more information about SQL types.
partition_options google.cloud.spanner_v1.types.PartitionOptions
Additional options that affect how many partitions are created.

Classes

ParamTypesEntry

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

The abstract base class for a message.

Parameters
NameDescription
kwargs dict

Keys and values corresponding to the fields of the message.

mapping Union[dict, .Message]

A dictionary or message to be used to determine the values for this message.

ignore_unknown_fields Optional(bool)

If True, do not raise errors for unknown fields. Only applied if mapping is a mapping type or there are keyword parameters.