Getting component name

[Former Member]

Guys,

I want to find the component names of my dynamic table

ASSIGN COMPONENT sy-index

OF STRUCTURE <wa_table> TO <dyn_field>.

I know there are couple of threads but they are confusing, I tried using one of the method

ref_table_des ?=

cl_abap_typedescr=>describe_by_name( p_data = <t_dyn_table> ).

idetails[] = ref_table_des->components[].

but then I get an error as formal parameter p_data does not exist.

[Former Member]

Check this Example.

DATA : sflighttype type ref to cl_abap_structdescr,
      comp_tab    type cl_abap_structdescr=>component_table.
field-symbols: <wa_comp> like line of comp_tab.
sflighttype ?= cl_abap_typedescr=>describe_by_name('SFLIGHT').
comp_tab = sflighttype->get_components( ).

LOOP AT comp_tab ASSIGNING <wa_comp>.
  write : / <wa_comp>-name.
ENDLOOP.

In your case.

it should be

ref_table_des ?=
cl_abap_typedescr=>describe_by_name( <t_dyn_table> ).

[Former Member]

when i do that i get this error...

The parameter p_name does not have correct type.

The program tried to pass an actual parameter to formal parameter

"P_NAME" of method "DESCRIBE_BY_NAME" of class "CL_ABAP_TYPEDESCR" that did not

have the type

C or STRING at runtime.

[Former Member]

I got it I should have changed the method type. Use describe by data.