ALV

[Former Member]

what is the advantage of ALV reports over classical and interactive reports..

Also can u tell how many columns we can display maximum in ALV

[Former Member]

Hi

A classic report is a program that generates a single list, which must contain all of the required detail information.

1) This procedure may result in extensive lists from which the user has to pick the relevant data.

2) For background processing, this is the only possible method. After starting a background job, there is no way of influencing the program.

3) The desired selections must be made beforehand and the list must provide detailed information.

4) For dialog sessions, there are no such restrictions.

5) The user is present during the execution of the program and can control and manipulate the program flow directly.

6) To be able to use all advantages of the online environment, classical reporting was developed into interactive reporting.

ALV

ABAP List Viewer

The common features of report are column alignment, sorting, filtering, subtotals, totals etc. To implement these, a lot of coding and logic is to be put. To avoid that we can use a concept called ABAP List Viewer (ALV).

This helps us to implement all the features mentioned very effectively.

Using ALV, We can have three types of reports:

1. Simple Report

2. Block Report

3. Hierarchical Sequential Report

There are some function modules which will enable to produce the above reports without much effort.

All the definitions of internal tables, structures and constants are declared in a type-pool called SLIS.

1. SIMPLE REPORT.

The important function modules are

a. Reuse_alv_list_display

b. Reuse_alv_fieldcatalog_merge

c. Reuse_alv_events_get

d. Reuse_alv_commentary_write

e. Reuse_alv_grid_display

A. REUSE_ALV_LIST_DISPLAY : This is the function module which prints the data.

The important parameters are :

I. Export :

i. I_callback_program : report id

ii. I_callback_pf_status_set : routine where a user can set his own pf status or change the functionality of the existing pf status

iii. I_callback_user_command : routine where the function codes are handled

iv. I_structure name : name of the dictionary table

v. Is_layout : structure to set the layout of the report

vi. It_fieldcat : internal table with the list of all fields and their attributes which are to be printed (this table can be populated automatically by the function module REUSE_ALV_FIELDCATALOG_MERGE

vii. It_events : internal table with a list of all possible events of ALV and their corresponding form names.

II. Tables :

i. t_outtab : internal table with the data to be output

B. REUSE_ALV_FIELDCATALOG_MERGE : This function module is used to populate a fieldcatalog which is essential to display the data in ALV. If the output data is from a single dictionary table and all the columns are selected, then we need not exclusively create the field catalog. Its enough to mention the table name as a parameter(I_structure name) in the REUSE_ALV_LIST_DISPLAY. But in other cases we need to create it.

The Important Parameters are :

I. Export :

i. I_program_name : report id

ii. I_internal_tabname : the internal output table

iii. I_inclname : include or the report name where all the dynamic forms are handled.

II Changing

ct_fieldcat : an internal table with the type SLIS_T_FIELDCAT_ALV which is

declared in the type pool SLIS.

C. REUSE_ALV_EVENTS_GET : Returns table of possible events for a list type

Parameters :

I. Import :

Et_Events : The event table is returned with all possible CALLBACK events

for the specified list type (column 'NAME'). For events to be processed by Callback, their 'FORM' field must be filled. If the field is initialized, the event is ignored. The entry can be read from the event table, the field 'FORM' filled and the entry modified using constants from the type pool SALV.

II. Export :

I_List_type :

0 = simple list REUSE_ALV_LIST_DISPLAY

1 = hierarchcal-sequential list REUSE_ALV_HIERSEQ_LIST_DISPLAY

2 = simple block list REUSE_ALV_BLOCK_LIST_APPEND

3 = hierarchical-sequential block list

REUSE_ALV_BLOCK_LIST_HS_APPEND

D. REUSE_ALV_COMMENTARY_WRITE : This is used in the Top-of-page event to print the headings and other comments for the list.

Parameters :

I. it_list_commentary : internal table with the headings of the type slis_t_listheader.

This internal table has three fields :

Typ : ‘H’ – header, ‘S’ – selection , ‘A’ - action

Key : only when typ is ‘S’.

Info : the text to be printed

E. REUSE_ALV_GRID_DISPLAY : A new function in 4.6 version, to display the results in grid rather than as a preview.

Parameters : same as reuse_alv_list_display

This is an example for simple list.

2. BLOCK REPORT

This is used to have multiple lists continuously.

The important functions used in this report are:

A. REUSE_ALV_BLOCK_LIST_INIT

B. REUSE_ALV_BLOCK_LIST_APPEND

C. REUSE_ALV_BLOCK_LIST_HS_APPEND

D. REUSE_ALV_BLOCK_LIST_DISPLAY

A. REUSE_ALV_BLOCK_LIST_INIT

Parameters:

I. I_CALLBACK_PROGRAM

II. I_CALLBACK_PF_STATUS_SET

III. I_CALLBACK_USER_COMMAND

This function module is used to set the default gui status etc.

B. REUSE_ALV_BLOCK_LIST_APPEND

Parameters :

Export :

I. is_layout : layout settings for block

II. it_fieldcat : field catalog

III. i_tabname : internal table name with output data

IV. it_events : internal table with all possible events

Tables :

i. t_outtab : internal table with output data.

This function module adds the data to the block.

Repeat this function for all the different blocks to be displayed one after the other.

C. REUSE_ALV_BLOCK_LIST_HS_APPEND

This function module is used for hierarchical sequential blocks.

D. REUSE_ALV_BLOCK_LIST_DISPLAY

Parameters : All the parameters are optional.

This function module display the list with data appended by the above function.

Here the functions REUSE_ALV_FIELDCATALOG_MERGE, REUSE_ALV_EVENTS_GET, REUSE_ALV_COMMENTARY_WRITE can be used.

3. Hierarchical reports :

Hierarchical sequential list output.

The function module is

A. REUSE_ALV_HIERSEQ_LIST_DISPLAY

Parameters:

I. Export:

i. I_CALLBACK_PROGRAM

ii. I_CALLBACK_PF_STATUS_SET

iii. I_CALLBACK_USER_COMMAND

iv. IS_LAYOUT

v. IT_FIELDCAT

vi. IT_EVENTS

vii. i_tabname_header : Name of the internal table in the program containing the

output data of the highest hierarchy level.

viii. i_tabname_item : Name of the internal table in the program containing the

output data of the lowest hierarchy level.

ix. is_keyinfo : This structure contains the header and item table field

names which link the two tables (shared key).

II. Tables

i. t_outtab_header : Header table with data to be output

ii. t_outtab_item : Name of the internal table in the program containing the

output data of the lowest hierarchy level.

slis_t_fieldcat_alv : This internal table contains the field attributes. This internal table can be populated automatically by using ‘REUSE_ALV_FIELDCATALOG_MERGE’.

Important Attributes :

A. col_pos : position of the column

B. fieldname : internal fieldname

C. tabname : internal table name

D. ref_fieldname : fieldname (dictionary)

E. ref_tabname : table (dictionary)

F. key(1) : column with key-color

G. icon(1) : icon

H. symbol(1) : symbol

I. checkbox(1) : checkbox

J. just(1) : (R)ight (L)eft (C)ent.

K. do_sum(1) : sum up

L. no_out(1) : (O)blig.(X)no out

M. outputlen : output length

N. seltext_l : long key word

O. seltext_m : middle key word

P. seltext_s : short key word

Q. reptext_ddic : heading (ddic)

R. ddictxt(1) : (S)hort (M)iddle (L)ong

S. datatype : datatype

T. hotspot(1) : hotspot

Thanks & Regards

ilesh 24x7

[Former Member]

hi Mahesh,

if want to know more about it just follow dis link:-

OR

www.saptecnical.com

OR

www.alvrobot.com

here u can get detailed examples of alv.

plzz give points also.

[Former Member]

hi,

also follow dis link ttooo:-

plzz give points also.

[Former Member]

Hi,

ALV provides following benefits over Classical report:

1. You can sort, Cut, COpy, Paste the output data

2. Option to play around with the data

3. You can filter the data as per your requirement

4. You can do totalling or sub-totalling

5. You can reduce the number of columns which you want in output

6. You can download the output to excel or html or text file

7. You can have editable ALV & edit & save records

8. Data output is in tabular format --> User friendly output

Goto SE38 transaction

Type BCALV* and click F4

A list of all standard sample SAP ALV programs would be displayed.

Best regards,

Prashant