Sha256: 7a834d21ed289b21b3b66d23eda74085ee924675aaeb60b05a307cc50065f3a3
Contents?: true
Size: 863 Bytes
Versions: 6
Compression:
Stored size: 863 Bytes
Contents
module Groonga
module ExpressionTree
class LogicalOperation
attr_reader :operator
attr_reader :nodes
def initialize(operator, nodes)
@operator = operator
@nodes = nodes
end
def build(expression)
@nodes.each_with_index do |node, i|
node.build(expression)
expression.append_operator(@operator, 2) if i > 0
end
end
def estimatable?
@nodes.all? do |node|
node.estimatable?
end
end
def estimate_size(table)
estimated_sizes = @nodes.collect do |node|
node.estimate_size(table)
end
case @operator
when Operator::AND
estimated_sizes.min
when Operator::OR
estimated_sizes.max
else
estimated_sizes.first
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems