Is it possible to create dynamic internal table with keys ? I am working with
call method cl_alv_table_create=>create_dynamic_table exporting it_fieldcatalog = lt_fldcat importing ep_table = lr_new_table
this gives the result without keys so I am not able to perform
read table <ft_itab> from <fs_itab> ....
where "fs_itab" should be line of "ft_itab" with keys (specified in lt_fieldcat). Using method above is TABLE_LINE also a table key.
To create a variable of any type dynamically at runtime, you may use the RTTC classes, followed by the statement CREATE DATA data_reference TYPE HANDLE rtti_instance.
For an internal table with its line being a structure (made of one or more fields), define first the structure with RTTC, then the internal table.
@Allen has shown a code sample in this other question: Dynamically defined variable in ABAP
To create a table type with a given primary key, use the parameters of the method CREATE of CL_ABAP_TABLEDESCR ; below is another writing of Allen's CREATE, but this one has a non-unique sorted primary key with components SIGN and LOW :
lo_table_descr = cl_abap_tabledescr=>create( p_line_type = lo_struc_descr p_table_kind = cl_abap_tabledescr=>tablekind_sorted p_unique = abap_false p_key = VALUE #( ( 'SIGN' ) ( 'LOW' ) ) p_key_kind = cl_abap_tabledescr=>keydefkind_user ).
You may also create the type with secondary keys, but I guess you don't need it.