To get a row of value by taking table name and primary key value

Question

i can't find out what's wrong.. pliz help.. m a fresher in SAP.
code is here
PARAMETER tname(10) TYPE c.
PARAMETER pkv(10) TYPE c.
DATA:
lt_dd03l TYPE STANDARD TABLE OF dd03l,
ls_dd03l TYPE dd03l.
DATA: my_table TYPE REF TO data,
wa_ref TYPE REF TO data.
FIELD-SYMBOLS: <it_tname> TYPE STANDARD TABLE,
  <tname_wa> TYPE ANY,
   <primary_key> TYPE ANY,
  <is_tname>.
SELECT * FROM dd03l INTO TABLE lt_dd03l
             WHERE tabname EQ tname.
LOOP AT lt_dd03l INTO ls_dd03l.
  IF ls_dd03l-fieldname NE 'MANDT' AND ls_dd03l-keyflag = 'X'.
WRITE:/ ls_dd03l-fieldname.
   primary_key = ls_dd03l-fieldname.
    EXIT.
  ENDIF.
ENDLOOP.
CREATE DATA my_table TYPE STANDARD TABLE OF (tname).
ASSIGN my_table->* TO <it_tname>.
CREATE DATA wa_ref LIKE LINE OF <it_tname>.
ASSIGN wa_ref->* TO <tname_wa>.
WRITE: / ls_dd03l-fieldname.
ASSIGN ls_dd03l-fieldname TO <primary_key>.
SELECT * INTO TABLE <it_tname>  FROM (tname)
WHERE <primary_key> =  pkv.
WRITE sy-subrc.
*WRITE : /   primary_key,
kv .
LOOP AT <it_tname> INTO <tname_wa> .
  DO.
    ASSIGN COMPONENT  sy-index
             OF STRUCTURE <tname_wa> TO <is_tname>.
   WRITE:/ <is_tname>-(primary_key).
    IF sy-subrc <> 0.
      WRITE :/ 'sy-subrc is not zero'.
      EXIT.
    ENDIF.
IF ls_dd03l-fieldname = pkv.
    WRITE: <is_tname>.
ENDIF.
  ENDDO.
ENDLOOP.
*ASSIGN <t_itab> TO <t_isturct>.
*SELECT * FROM (tname) INTO TABLE <t_itab>.
*LOOP AT <t_itab> INTO <t_isturct>.
WRITE :/
  <t_isturct>.
*ENDLOOP.

Answer 1

Please check whether bname has any conversion exits.
try hardcoding the value like '0000105397' and passing into the query.
SELECT * FROM (tname) INTO table <it_tname>
where <primary_key> = '0000105397'.  "If it works then use conversion exit.
or try like this
types : begin of ty_where,
        line type char100,
        end of ty_where.
data:it_where type table of ty_where.
data:wa_where type ty_where.
data:val type char100.
concatenate <primary_key> 'EQ' into wa_where-line seperated by space.
concatenate `'` pkv `'` into val. condense val no-gaps.
concatenate wa_where-line val into wa_where-line seperated by space.
append wa_where to it_where.
SELECT * FROM (tname) INTO table <it_tname>
where ( it_where ).