Creating table at runtime w/o knowing the structure

Former Member — Thu, 08 Apr 2010 08:25:00 GMT

Hi,

I have searched high and far to find a solution for my needs, but have not come across anything. Hopefully, the knowledge here is greater than my searching skills

In an ABAP called during Dynamic Actions I have the need for storing data retrieved from the Call Stack via an ASSIGN command:

DATA: gv_ps_ref TYPE char50 VALUE '(SAPFP50P)PS[]'.

FIELD-SYMBOLS: <gt_ps_table> TYPE STANDARD TABLE.

ASSIGN (gv_ps_ref) TO <gt_ps_table>.

The ASSIGN part works beautifully - in debugging I now have access to the data in the PS table. But I need to store the data locally, as PS gets refreshed by this, which then also refreshes my <GT_PS_TABLE>:

PERFORM initialize_ps(sapfp50p).

The thing is, I need the data for later use, so I want to separate the link and create a local copy.

This code (most of it copied from other solutions here on SDN) works fine, but notice that the DESCRIBE_BY_DATA method is called with the GS_DATA structure. This means that the TYPE of the table that I want to create dynamically is known.

DATA: BEGIN OF gt_data OCCURS 5,

char TYPE text5,

numc TYPE numc5,

dec TYPE pad_amt7s,

END OF gt_data.

DATA: gs_data LIKE LINE OF gt_data.

DATA: go_struct TYPE REF TO cl_abap_structdescr,

go_new_type TYPE REF TO cl_abap_structdescr,

go_new_tab TYPE REF TO cl_abap_tabledescr,

gt_comp TYPE cl_abap_structdescr=>component_table,

go_data TYPE REF TO data.

FIELD-SYMBOLS: <fs_any> TYPE ANY TABLE.

go_struct ?= cl_abap_typedescr=>describe_by_data( gs_data ). "see alternate reference below, i.e. my need

gt_comp = go_struct->get_components( ).

go_new_type = cl_abap_structdescr=>create( gt_comp ).

go_new_tab = cl_abap_tabledescr=>create(

p_line_type = go_new_type

p_table_kind = cl_abap_tabledescr=>tablekind_std

p_unique = abap_false ).

CREATE DATA go_data TYPE HANDLE go_new_tab.

ASSIGN go_data->* TO <fs_any>.

<fs_any> = gt_data[].

As indicated, having only a reference to the PS table (<GT_PS_TABLE>) is not enough, I want to create a copy of PS locally, without knowing how it is declared in FP50PPSB (partly via a structure, partly via separate fields), as this will make my coding insensitive to any change in the structure.

This is my visualization of what I want to do, or the likes - I believe you get the idea. But is it possible?

go_struct ?= cl_abap_typedescr=>describe_by_data( <gt_ps_table> ).

The syntax checker allows for this, but it dumps at runtime

Re: Creating table at runtime w/o knowing the structure

jrg_wulf — Thu, 08 Apr 2010 14:40:56 GMT

Hi,

besides that your posting is allmost unreadable (try preview before posting), your basic idea is correct. You just overdid it a bit.

Just try something like this


  data: a_descr TYPE REF TO CL_ABAP_TYPEDESCR.
  FIELD-SYMBOLS: <val> type any.
     a_descr = cl_abap_datadescr=>describe_by_data( p_data =  st_val ).
    CREATE DATA me->d_ref type (a_descr->ABSOLUTE_NAME).
    assign me->d_ref->* to <val>.
    <val> = st_val.

this should work fine with all types of data, structures or tables.

Regards

Jörg

Re: Creating table at runtime w/o knowing the structure

Former Member — Thu, 08 Apr 2010 15:37:15 GMT

Hi Jörg,

Thanks for your help - it actually works

Sorry for the composition of my text - I must admit that I didn't check it, as it looked ok when typing. I will keep an eye on that next time.

Points have been awarded - thanks again.

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Creating table at runtime w/o knowing the structure

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