Create dynamic internal table

[Former Member]

Hi experts,

could anyone please give me the code on creating an internal table dynamically?

i want to create an internal table which i can add or remove a field as the program runs.

thanks in advance.

[ferry_lianto]

Hi,

Check this sample code from other thread.

===================================== 
REPORT zmaschl_create_data_dynamic . 

TYPE-POOLS: slis. 

DATA: it_fcat TYPE slis_t_fieldcat_alv, 
is_fcat LIKE LINE OF it_fcat. 
DATA: it_fieldcat TYPE lvc_t_fcat, 
is_fieldcat LIKE LINE OF it_fieldcat. 
DATA: new_table TYPE REF TO data. 
DATA: new_line TYPE REF TO data. 
FIELD-SYMBOLS: <l_table> TYPE ANY TABLE, 
<l_line> TYPE ANY, 
<l_field> TYPE ANY. 

* Build fieldcat 
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE' 
EXPORTING 
i_structure_name = 'SYST' 
CHANGING 
ct_fieldcat = it_fcat[]. 
LOOP AT it_fcat INTO is_fcat WHERE NOT reptext_ddic IS initial. 
MOVE-CORRESPONDING is_fcat TO is_fieldcat. 
is_fieldcat-fieldname = is_fcat-fieldname. 
is_fieldcat-ref_field = is_fcat-fieldname. 
is_fieldcat-ref_table = is_fcat-ref_tabname. 
APPEND is_fieldcat TO it_fieldcat. 
ENDLOOP. 

* Create a new Table 
CALL METHOD cl_alv_table_create=>create_dynamic_table 
EXPORTING 
it_fieldcatalog = it_fieldcat 
IMPORTING 
ep_table = new_table. 

* Create a new Line with the same structure of the table. 
ASSIGN new_table->* TO <l_table>. 
CREATE DATA new_line LIKE LINE OF <l_table>. 
ASSIGN new_line->* TO <l_line>. 

* Test it... 
DO 30 TIMES. 
ASSIGN COMPONENT 'SUBRC' OF STRUCTURE <l_line> TO <l_field>. 
<l_field> = sy-index. 
INSERT <l_line> INTO TABLE <l_table>. 
ENDDO. 

LOOP AT <l_table> ASSIGNING <l_line>. 
ASSIGN COMPONENT 'SUBRC' OF STRUCTURE <l_line> TO <l_field>. 
WRITE <l_field>. 
ENDLOOP. 

Hope this will help.

Regards,

Ferry Liato

[sourabhshah]

Hi Jesus,

Create a fieldcatalog with the desired fields and the call the method given below this creates a internal table at runtime.

DATA: lt_fieldcat TYPE lvc_t_fcat.

FIELD-SYMBOLS:<GT_TABLE1> TYPE TABLE.

CALL METHOD cl_alv_table_create=>create_dynamic_table

EXPORTING it_fieldcatalog = lt_fieldcat

IMPORTING ep_table = lp_table.

ASSIGN lp_table->* TO <gt_table1>.

Regards,

Sourabh

[Former Member]

Hi

The concept of usinf field symbols is quite useful in creating dynamic objects.

Plz try the following code :

tables: rsrd1.

data: linetype type string,

itabref type ref to data,

wa_fs type ref to data.

data : wa_out type string.

field-symbols: <fs> type standard table,

<fs1> type any .

parameter tbl like rsrd1-tbma_val. " For table name

linetype = tbl.

" dynamic table creation

create data itabref type standard table of (linetype).

assign itabref->* to <fs> . " Assign object to Field symbol

" It now behaves like an int table with initial

" values

select * from (tbl) into table <fs>.

create data wa_fs like line of <fs>.

assign wa_fs->* to <fs1> .

loop at <fs> into <fs1> . " or assigning <fs1>. even this works

endloop.

write 😕 'done' .

Regards

Pankaj