SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtract (children 1)
     ExpressionList (children 3)
      Literal \'{"a" : "5801c962-1182-458a-89f8-d077da5074f9"}\'
      Literal \'a\'
      Literal \'LowCardinality(UUID)\'
