What's wrong with follow code

[former_member146317]

FUNCTION ZSM_READDSO.

*"----

---

""Local Interface:

*" IMPORTING

*" REFERENCE(I_INFOPROV) TYPE RSINFOPROV

*" REFERENCE(I_KEYDATE) TYPE RRSRDATE OPTIONAL

*" REFERENCE(I_TH_SFC) TYPE RSDRI_TH_SFC

*" REFERENCE(I_TH_SFK) TYPE RSDRI_TH_SFK

*" REFERENCE(I_T_RANGE) TYPE RSDRI_T_RANGE OPTIONAL

*" REFERENCE(I_TX_RANGETAB) TYPE RSDRI_TX_RANGETAB OPTIONAL

*" REFERENCE(I_PACKAGESIZE) TYPE I OPTIONAL

*" REFERENCE(I_FIRST_CALL) TYPE RS_BOOL

*" EXPORTING

*" REFERENCE(E_T_DATA) TYPE STANDARD TABLE

*" REFERENCE(E_END_OF_DATA) TYPE RS_BOOL

*" REFERENCE(E_T_MSG) TYPE RS_T_MSG

*"----

---

type-pools: rs, rsdrc.

data :

First_call type rs_bool,

r_linetype type ref to cl_abap_structdescr,

r_linetype2 type ref to cl_abap_typedescr,

r_tabletype type ref to cl_abap_tabledescr,

itab_data type ref to data.

r_linetype2 = cl_abap_typedescr=>DESCRIBE_BY_DATA( e_T_data ).

<b>r_linetype ?= r_linetype2.</b> " ERROR THERE

r_tabletype = cl_abap_tabledescr=>create(

p_line_type = r_linetype ).

......................

.......................

[Former Member]

Hi Jacky,

r_linetype2 is not required.

<b><u>Try this out..</u></b>

r_linetype type ref to cl_abap_structdescr,

r_linetype?= cl_abap_typedescr=>DESCRIBE_BY_DATA( e_T_data ).

<b><u>Check this code...</u></b>

tables: p0442.

TYPES:

BEGIN OF my_struct,

comp_a type i,

comp_b type f,

END OF my_struct.

DATA:

my_data TYPE my_struct,

descr_ref TYPE ref to cl_abap_structdescr.

FIELD-SYMBOLS:

<comp_wa> TYPE abap_compdescr.

START-OF-SELECTION.

*descr_ref ?= cl_abap_typedescr=>describe_by_data( my_data ).

• call for all entries

*descr_ref ?= cl_abap_typedescr=>describe_by_data( p0442 ).

descr_ref ?= cl_abap_typedescr=>describe_by_name('MARA').

LOOP AT descr_ref->components ASSIGNING <comp_wa>.

WRITE: / <comp_wa>-name.

ENDLOOP.

Regards,

Younus

<b>Reward Helpful Answers:-)</b>

[former_member146317]

Thank you for your attention!

yes, I know what do you mean, in fact, my oraginal code exactlly same with your suggestion:

r_linetype?= cl_abap_typedescr=>DESCRIBE_BY_DATA( e_T_data ).

But the error occur,

I really don't know why this happen, because i follow the rule listed in BC400....