Dynamic Internal Table

[Former Member]

Hello all,

I have the below requirement.

Based on certain conditions i am building a dynamic fieldcatalog.The number of columns for the Fieldcatalog are determined.

Ex : Number of columns can be 21 or 39 or 51.

Now my requirement is that i need to fill in these fieldcatalog with the data from my internal table.

How do i create an Internal table having the exact number of columns.I have to use the RTTS classes like

CL_ABAP_TYPEDESCR

CL_ABAP_STRUCTDESCR

I cant use CL_ALV_TABLE_CREATE as it gives a Dump after certain instances.So it doesnt meet my logic.

Kindly suggest.

Regards,

Arun

[RichHeilman]

Hopefully you are using a newer release of NetWeaver. If so, you can do something like this.

TYPE-POOLS: abap.

DATA:
  lr_structdescr    TYPE REF TO cl_abap_structdescr,
  lr_tabledescr     TYPE REF TO cl_abap_tabledescr,
  lr_datadescr      TYPE REF TO cl_abap_datadescr,
  lt_components     TYPE abap_component_tab,
  ls_component      TYPE LINE OF abap_component_tab,
  lr_wa             TYPE REF TO data,
  lr_tab            TYPE REF TO data.

DATA: lv_index_num(3) TYPE n.
DATA: lv_index_char(3) TYPE c.

FIELD-SYMBOLS: <fs_wa> TYPE ANY.
FIELD-SYMBOLS: <fs_tab> TYPE table.

START-OF-SELECTION.

  DO 20 TIMES.
    lv_index_num = sy-index.
    lv_index_char = lv_index_num.
    CONCATENATE 'value' lv_index_char INTO ls_component-name.
    ls_component-type ?= cl_abap_elemdescr=>get_c( p_length = 10 ).
    INSERT ls_component INTO TABLE lt_components.
  ENDDO.

* get structure descriptor -> lr_STRUCTDESCR
  lr_structdescr ?= cl_abap_structdescr=>create( lt_components ).

* create work area of structure lr_STRUCTDESCR -> lr_WA
  CREATE DATA lr_wa TYPE HANDLE lr_structdescr.
  ASSIGN lr_wa->* TO <fs_wa>.

  lr_datadescr ?= lr_structdescr.
  lr_tabledescr ?= cl_abap_tabledescr=>create( lr_datadescr ).

* Create dynmaic internal table, <FS_TAB> will be your dynamic internal table
  CREATE DATA lr_tab TYPE HANDLE lr_tabledescr.
  ASSIGN lr_tab->* TO <fs_tab>.

[Former Member]

Hello,

Can you help me with the below issue.I referred ur suggestion for building the Dynamic Internal table.

Issue is :

I have created a Dynamic ALV using RTTS classes like cl_abap_structdescr,cl_abap_tabledescr and cl_abap_datadescr.

The number of columns to be displayed is dynamic and i am able to display the same.

Now i need to perform SUBTOTAL on few of the columns.

In dynamic table how do i assign those columns as Type 'I' so that i can perform DO_SUM.

I used the method GET_I of class cl_abap_elemdescr but unable to achive the same.

Kindly suggest.

Regards,

Arun