Sha256: 83d155678543f5eeed1cdb8260b760e8e8afeb88e3ca2dde7a29c36b7cacd27c
Contents?: true
Size: 759 Bytes
Versions: 18
Compression:
Stored size: 759 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 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
18 entries across 18 versions & 1 rubygems