SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Asterisk
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function viewExplain (children 1)
              ExpressionList (children 3)
               Literal \'EXPLAIN\'
               Literal \'actions = 1\'
               Subquery (children 1)
                SelectWithUnionQuery (children 1)
                 ExpressionList (children 1)
                  SelectQuery (children 3)
                   ExpressionList (children 1)
                    Asterisk
                   TablesInSelectQuery (children 1)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier tab
                   ExpressionList (children 1)
                    OrderByElement (children 1)
                     Function intDiv (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_2
   Function like (children 1)
    ExpressionList (children 2)
     Identifier explain
     Literal \'%sort description%\'
