Получить список из имен полей любой таблицы

    DATA : dyntab TYPE REF TO data.
    FIELD-SYMBOLS : <table> TYPE ANY TABLE.
    CREATE DATA dyntab TYPE TABLE OF (lv_tabname).

    DATA:
      lcl_table_descr TYPE REF TO cl_abap_tabledescr,
      lcl_struc_descr TYPE REF TO cl_abap_structdescr.

    ASSIGN dyntab->* TO <table>.
    lcl_table_descr ?= cl_abap_typedescr=>describe_by_data( <table> ).
    lcl_struc_descr ?= lcl_table_descr->get_table_line_type( ).
    DATA(it_components) = lcl_struc_descr->components.

DATA : dyntab TYPE REF TO data.

FIELD-SYMBOLS : <table> TYPE ANY TABLE.

CREATE DATA dyntab TYPE TABLE OF (lv_tabname).

DATA:

lcl_table_descr TYPE REF TO cl_abap_tabledescr,

lcl_struc_descr TYPE REF TO cl_abap_structdescr.

ASSIGN dyntab->* TO <table>.

lcl_table_descr ?= cl_abap_typedescr=>describe_by_data( <table> ).

lcl_struc_descr ?= lcl_table_descr->get_table_line_type( ).

DATA(it_components) = lcl_struc_descr->components.