SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 7)
    Identifier table
    Identifier name
    Identifier type
    Identifier compression_codec
    Identifier data_uncompressed_bytes (alias u)
    Identifier data_compressed_bytes (alias c)
    Function round (alias ratio) (children 1)
     ExpressionList (children 2)
      Function divide (children 1)
       ExpressionList (children 2)
        Identifier u
        Identifier c
      Literal UInt64_3
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.columns
   Function and (children 1)
    ExpressionList (children 4)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier table
       Literal \'codecTest\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier database
       Function currentDatabase (children 1)
        ExpressionList
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier compression_codec
       Literal \'\'
     Function lessOrEquals (children 1)
      ExpressionList (children 2)
       Identifier ratio
       Literal UInt64_1
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier table
    OrderByElement (children 1)
     Identifier name
    OrderByElement (children 1)
     Identifier type
