SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function has (children 1)
     ExpressionList (children 2)
      Identifier a
      Function toDecimal32 (children 1)
       ExpressionList (children 2)
        Literal Float64_0.1
        Literal UInt64_2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier decimal
