Sha256: f2be4d2cd72f69dbc529d44634e25721d3f1c558d093165739d0f22b36f6209e
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Versions: 5
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Contents
module Alf
module Sql
class Processor
class Merge < Processor
def initialize(kind, right, builder)
super(builder)
@kind = kind
@right = right
end
def on_with_exp(sexpr)
if @right.with_exp?
reordered = Reorder.new(sexpr.to_attr_list, builder).call(@right)
main = [ @kind, builder.distinct, sexpr.select_exp, reordered.select_exp ]
merge_with_exps(sexpr, reordered, main)
else
[ :with_exp,
sexpr.with_spec,
apply(sexpr.last) ]
end
end
def on_nonjoin_exp(sexpr)
reordered = Reorder.new(sexpr.to_attr_list, builder).call(@right)
if @right.with_exp?
[ :with_exp,
reordered.with_spec,
[ @kind, builder.distinct, sexpr, reordered.select_exp ] ]
else
[ @kind, builder.distinct, sexpr, reordered ]
end
end
alias :on_union :on_nonjoin_exp
alias :on_except :on_nonjoin_exp
alias :on_intersect :on_nonjoin_exp
alias :on_select_exp :on_nonjoin_exp
end # class Merge
end # class Processor
end # module Sql
end # module Alf
Version data entries
5 entries across 5 versions & 1 rubygems