SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function mergeTreePartInfo (alias info) (children 1)
     ExpressionList (children 1)
      Literal \'all_12_25_7_4\'
   ExpressionList (children 5)
    Identifier info.partition_id
    Identifier info.min_block
    Identifier info.max_block
    Identifier info.level
    Identifier info.mutation
