Dynamic Internal Table

[Former Member]

Hi Abapers,

Can anyone plz tell me wat is dynamic internal table with an example to create dynamic internal table?

Thanks in Advance...

Thanks & Regards,

Radhika Dasharatha.

[Former Member]

hi

good

type-pools : abap.

field-symbols: <dyn_table> type standard table,

<dyn_wa>,

<dyn_field>.

data: dy_table type ref to data,

dy_line type ref to data,

xfc type lvc_s_fcat,

ifc type lvc_t_fcat.

selection-screen begin of block b1 with frame.

parameters: p_table(30) type c default 'T001'.

selection-screen end of block b1.

start-of-selection.

perform get_structure.

perform create_dynamic_itab. *********Creates a dyanamic internal table*********

perform get_data.

perform write_out.

form get_structure.

data : idetails type abap_compdescr_tab,

xdetails type abap_compdescr.

data : ref_table_des type ref to cl_abap_structdescr.

• Get the structure of the table.

ref_table_des ?=

cl_abap_typedescr=>describe_by_name( p_table ).

idetails[] = ref_table_des->components[].

loop at idetails into xdetails.

clear xfc.

xfc-fieldname = xdetails-name .

xfc-datatype = xdetails-type_kind.

xfc-inttype = xdetails-type_kind.

xfc-intlen = xdetails-length.

xfc-decimals = xdetails-decimals.

append xfc to ifc.

endloop.

endform.

form create_dynamic_itab.

• Create dynamic internal table and assign to FS

call method cl_alv_table_create=>create_dynamic_table

exporting

it_fieldcatalog = ifc

importing

ep_table = dy_table.

assign dy_table->* to <dyn_table>.

• Create dynamic work area and assign to FS

create data dy_line like line of <dyn_table>.

assign dy_line->* to <dyn_wa>.

endform.

form get_data.

• Select Data from table.

select * into table <dyn_table>

from (p_table).

endform.

Write out data from table.

loop at <dyn_table> into <dyn_wa>.

do.

assign component sy-index

of structure <dyn_wa> to <dyn_field>.

if sy-subrc <> 0.

exit.

endif.

if sy-index = 1.

write:/ <dyn_field>.

else.

write: <dyn_field>.

endif.

enddo.

endloop.

go through this link

http://www.sap-img.com/ab030.htm

thanks

mrutyun^

[Former Member]

Dynamic internal table is nothing more than a normal internal ..

But we create it during run time according to our requirements..

You will need to use field-symbols to use dynamic internal tables.

Sample Code is given below...

data: t_fieldcat TYPE lvc_t_fcat,

wa_fieldcat TYPE lvc_s_fcat,

new_table TYPE REF TO data,

new_line TYPE REF TO data.

field-symbols: <t_tab> TYPE STANDARD TABLE,

<wa_str> type any.

wa_fieldcat-fieldname = 'FLD1'.

wa_fieldcat-tabname = 'TAB'.

wa_fieldcat-datatype = 'CHAR'.

wa_fieldcat-inttype = 'C'.

wa_fieldcat-intlen = w_len1. " determine during run time

APPEND wa_fieldcat TO t_fieldcat.

wa_fieldcat-fieldname = 'FLD2'.

wa_fieldcat-tabname = 'TAB'.

wa_fieldcat-datatype = 'CHAR'.

wa_fieldcat-inttype = 'C'.

wa_fieldcat-intlen = w_len2. " determine during run time

APPEND wa_fieldcat TO t_fieldcat.

CALL METHOD cl_alv_table_create=>create_dynamic_table

EXPORTING

it_fieldcatalog = t_fieldcat

IMPORTING

ep_table = new_table.

ASSIGN new_table->* TO <t_tab>.

CREATE DATA new_line LIKE LINE OF <t_tab>.

ASSIGN new_line->* TO <wa_str>.

• Now <t_tab> is the internal table and <wa_str> is its work area

u can not access the fields of dynamic internal directly..

u will have to use ASSIGN COMPONENT statement for this purpose...

syntax is :

loop at <t_tab> into <wa_str>.

do.

ASSIGN COMPONENT sy-index OF STRUCTURE <wa_str> TO <l_field>

if sy-subrc ne 0.

exit.

endif.

• Do ur coding for fields..

enddo.

Reward if u find it useful...

tell me if u still need some more..