Class: Google::Cloud::Spanner::V1::PartitionQueryRequest

Inherits:
Object
  • Object
show all
Extended by:
Protobuf::MessageExts::ClassMethods
Includes:
Protobuf::MessageExts
Defined in:
proto_docs/google/spanner/v1/spanner.rb

Overview

The request for PartitionQuery

Defined Under Namespace

Classes: ParamTypesEntry

Instance Attribute Summary collapse

Instance Attribute Details

#param_types ⇒ ::Google::Protobuf::Map{::String => ::Google::Cloud::Spanner::V1::Type}

Returns 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 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 for more information about SQL types.

Returns:

  • (::Google::Protobuf::Map{::String => ::Google::Cloud::Spanner::V1::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 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 for more information about SQL types.



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# File 'proto_docs/google/spanner/v1/spanner.rb', line 758

class PartitionQueryRequest
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::Google::Cloud::Spanner::V1::Type]
  class ParamTypesEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end
end

#params ⇒ ::Google::Protobuf::Struct

Returns 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 + 100"

It is an error to execute a SQL statement with unbound parameters.

Returns:

  • (::Google::Protobuf::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 + 100"

    It is an error to execute a SQL statement with unbound parameters.



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# File 'proto_docs/google/spanner/v1/spanner.rb', line 758

class PartitionQueryRequest
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::Google::Cloud::Spanner::V1::Type]
  class ParamTypesEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end
end

#partition_options ⇒ ::Google::Cloud::Spanner::V1::PartitionOptions

Returns Additional options that affect how many partitions are created.

Returns:



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# File 'proto_docs/google/spanner/v1/spanner.rb', line 758

class PartitionQueryRequest
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::Google::Cloud::Spanner::V1::Type]
  class ParamTypesEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end
end

#session ⇒ ::String

Returns Required. The session used to create the partitions.

Returns:

  • (::String) —

    Required. The session used to create the partitions.



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# File 'proto_docs/google/spanner/v1/spanner.rb', line 758

class PartitionQueryRequest
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::Google::Cloud::Spanner::V1::Type]
  class ParamTypesEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end
end

#sql ⇒ ::String

Returns Required. The query request to generate partitions for. The request will fail if the query is not root partitionable. For a query to be root partitionable, it needs to satisfy a few conditions. For example, if the query execution plan contains a distributed union operator, then it must be the first operator in the plan. For more information about other conditions, see Read data in parallel.

The query request must not contain DML commands, such as INSERT, UPDATE, or DELETE. Use ExecuteStreamingSql with a PartitionedDml transaction for large, partition-friendly DML operations.

Returns:

  • (::String) —

    Required. The query request to generate partitions for. The request will fail if the query is not root partitionable. For a query to be root partitionable, it needs to satisfy a few conditions. For example, if the query execution plan contains a distributed union operator, then it must be the first operator in the plan. For more information about other conditions, see Read data in parallel.

    The query request must not contain DML commands, such as INSERT, UPDATE, or DELETE. Use ExecuteStreamingSql with a PartitionedDml transaction for large, partition-friendly DML operations.



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# File 'proto_docs/google/spanner/v1/spanner.rb', line 758

class PartitionQueryRequest
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::Google::Cloud::Spanner::V1::Type]
  class ParamTypesEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end
end

#transaction ⇒ ::Google::Cloud::Spanner::V1::TransactionSelector

Returns Read only snapshot transactions are supported, read/write and single use transactions are not.

Returns:



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# File 'proto_docs/google/spanner/v1/spanner.rb', line 758

class PartitionQueryRequest
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # @!attribute [rw] key
  #   @return [::String]
  # @!attribute [rw] value
  #   @return [::Google::Cloud::Spanner::V1::Type]
  class ParamTypesEntry
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end
end