SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   Function equals (children 1)
    ExpressionList (children 2)
     Function multiply (children 1)
      ExpressionList (children 2)
       Function plus (children 1)
        ExpressionList (children 2)
         Identifier a
         Identifier b
       Identifier c
     Literal UInt64_8
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function sin (children 1)
      ExpressionList (children 1)
       Function divide (children 1)
        ExpressionList (children 2)
         Identifier a
         Identifier b
