Dynamic internal table creation

[Former Member]

Hi All,

I have a problem with creation of an internal table.

First intarnal table contain two fields name and value.

Second table will be created according to this name value pair.

loop at itab1

itab2-??? = itab1-value.

append itab2.

endloop.

How Should I do dynamically so that itab2 can be created.

Regards,

Jeetu

[Former Member]

Hi All,

Can I use field symbols in this case. Could anyboby propose any solution?

[Former Member]

Hi,

This is very good example ,

Check this example..

If you give the input as 3...IT will create 3 columns..

PARAMETERS: p_input TYPE i OBLIGATORY.

START-OF-SELECTION.

DATA: v_fieldname TYPE char30.

DATA: v_char TYPE numc4.

DATA: it_fldcat TYPE lvc_t_fcat.

DATA: wa_it_fldcat LIKE LINE OF it_fldcat.

DATA: gp_table TYPE REF TO data.

FIELD-SYMBOLS: <gt_table> TYPE table.

DO p_input TIMES.

v_fieldname = 'COL'.

v_char = sy-index.

CONCATENATE v_fieldname v_char INTO v_fieldname.

CONDENSE v_fieldname.

CLEAR wa_it_fldcat.

wa_it_fldcat-fieldname = v_fieldname.

wa_it_fldcat-datatype = 'CHAR'.

wa_it_fldcat-outputlen = 5.

wa_it_fldcat-intlen = 5.

APPEND wa_it_fldcat TO it_fldcat .

ENDDO.

Internal table creation..

CALL METHOD cl_alv_table_create=>create_dynamic_table

EXPORTING it_fieldcatalog = it_fldcat

IMPORTING ep_table = gp_table.

ASSIGN gp_table->* TO <gt_table>.

CHECK sy-subrc = 0.

DATA: WA TYPE REF TO DATA.

Work area for the dynamic internal table.

CREATE DATA WA LIKE LINE OF <gt_table>.

WRITE: / 'Dynamic internal table created'.

[Former Member]

Hi Murli,

How can I get the internal table from ur example.

[Former Member]

Hi,

FIELD-SYMBOLS: <gt_table> TYPE table.

In field catelog we are appending the column names and length .

wa_it_fldcat-fieldname = v_fieldname.

wa_it_fldcat-datatype = 'CHAR'.

wa_it_fldcat-outputlen = 5.

wa_it_fldcat-intlen = 5.

APPEND wa_it_fldcat TO it_fldcat .

add one more field to field to field catelog .

Here we are passing field catelog to method to create internal table.

Internal table creation..

CALL METHOD cl_alv_table_create=>create_dynamic_table

EXPORTING it_fieldcatalog = it_fldcat

IMPORTING ep_table = gp_table.

what ever importing structure we are getting gp_table

that we are assignig to field sysmbol gt_table.

You know that field symbol can take any structure dynamically.

here we are assigning workarea to internal table.

DATA: WA TYPE REF TO DATA.

Work area for the dynamic internal table.

CREATE DATA WA LIKE LINE OF <gt_table>.

[Former Member]

Hi All,

In my case the scnario is a different one.

Let me explain it again. I have table dttab has many fields.

Fields of dttab : f1,f2,f3,f4 etc.

Now I will get one internal table as itab1 with two fields :name and value. The name field contains the name of fields of dttab. i.e f1, aaa

f2, bbb

f3, ccc

Now I need to create an internal table itab2 of type dttab but dynamically.

loop at itab1.

itab2-??? = itab1-value ( like 'aaa', 'bbb' etc)

append itab2.

endloop.

In place of ??? I need to send f1,f2,f3 etc. But how can I detemine it dynamically.

Regards,

Jeetu

[former_member188594]

Hi Jeetu,

Please refer the following link which explains the concept of dynamic internal table very clearly.

[http://www.saptechnical.com/Tutorials/ABAP/DynamicInternaltable/DynamicInternalTable.htm]

Reward points if useful.

Regards,

sekhar.