SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier s
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test2
   Function equals (children 1)
    ExpressionList (children 2)
     Function toFloat32 (children 1)
      ExpressionList (children 1)
       Identifier s
     Literal Float64_7777