6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
# File 'lib/bmg/sql/nodes/select_list.rb', line 6
def desaliaser(for_predicate = false)
->(a){
item = sexpr_body.find{|item| item.as_name.to_s == a.to_s }
return nil unless left = item && item.left
return left unless for_predicate
case left.first
when :literal
Predicate::Grammar.sexpr([:literal, left.last])
when :qualified_name
Predicate::Grammar.sexpr([:qualified_identifier, left.qualifier.to_sym, left.as_name.to_sym])
else
raise "Unexpected select_item `#{left}`"
end
}
end
|