Class: Cassandra::Statements::Batch

Inherits:
Object
  • Object
show all
Includes:
Cassandra::Statement
Defined in:
lib/cassandra/statements/batch.rb

Overview

Batch statement groups several Cassandra::Statement. There are several types of Batch statements available:

See Also:

Instance Method Summary collapse

Instance Method Details

#add(statement, args = nil) ⇒ self

Note:

Positional arguments for simple statements are only supported starting with Apache Cassandra 2.0 and above.

Note:

Named arguments for simple statements are only supported starting with Apache Cassandra 2.1 and above.

Adds a statement to this batch.

Parameters:

Returns:

  • (self) 


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# File 'lib/cassandra/statements/batch.rb', line 74

def add(statement, args = nil)
  args ||= EMPTY_LIST

  case statement
  when String
    @statements << Simple.new(statement, args)
  when Prepared
    @statements << statement.bind(args)
  when Bound, Simple
    @statements << statement
  else
    raise ::ArgumentError, "a batch can only consist of simple or prepared statements, #{statement.inspect} given"
  end

  self
end

#cql ⇒ nil

A batch statement doesn't really have any cql of its own as it is composed of multiple different statements

Returns:

  • (nil) —

    nothing



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# File 'lib/cassandra/statements/batch.rb', line 93

def cql
  nil
end

#inspect ⇒ String

Returns a CLI-friendly batch statement representation.

Returns:

  • (String) —

    a CLI-friendly batch statement representation



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# File 'lib/cassandra/statements/batch.rb', line 102

def inspect
  "#<#{self.class.name}:0x#{self.object_id.to_s(16)} @type=#{type.inspect}>"
end

#type ⇒ Symbol

Returns one of :logged, :unlogged or :counter.

Returns:

  • (Symbol) —

    one of :logged, :unlogged or :counter



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# File 'lib/cassandra/statements/batch.rb', line 98

def type
end