SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tuple_01016
   Function less (children 1)
    ExpressionList (children 2)
     Identifier a
     Function tuple (children 1)
      ExpressionList (children 2)
       Function toDateTime (children 1)
        ExpressionList (children 1)
         Literal \'2019-01-01 00:00:00\'
       Literal UInt64_0
 Identifier Null
