pg_query_example1.rb

require 'pg_query'

pp PgQuery.parse("SELECT 1")
#<PgQuery:0x007f8cdaa8f8b8
 @parsetree=
  [{"SELECT"=>
     {"distinctClause"=>nil,
      "intoClause"=>nil,
      "targetList"=>
       [{"RESTARGET"=>
          {"name"=>nil,
           "indirection"=>nil,
           "val"=>{"A_CONST"=>{"val"=>1, "location"=>7}},
           "location"=>7}}],
      "fromClause"=>nil,
      "whereClause"=>nil,
      "groupClause"=>nil,
      "havingClause"=>nil,
      "windowClause"=>nil,
      "valuesLists"=>nil,
      "sortClause"=>nil,
      "limitOffset"=>nil,
      "limitCount"=>nil,
      "lockingClause"=>nil,
      "withClause"=>nil,
      "op"=>0,
      "all"=>false,
      "larg"=>nil,
      "rarg"=>nil}}],
 @query="SELECT 1",
 @warnings=[]>

@j-d Late response, but this is fixed now :)