SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function getMergeTreeSetting (children 2)
     ExpressionList (children 1)
      Literal UInt64_4096
     ExpressionList (children 1)
      Literal \'index_granularity\'
