topic Alv Function modules in Application Development and Automation Discussions

Alv Function modules

Former Member — Sat, 05 Jan 2008 11:02:36 GMT

Hi,

can i know differnt types of Alv f.m's and purpose of them .

Edited by: vasanth kandula on Jan 5, 2008 4:32 PM

Re: Alv Function modules

Former Member — Sat, 05 Jan 2008 11:09:08 GMT

Hi,

REUSE_FIELDCATALOG_MERGE for building field catalog.

REUSE_ALV_GRID_DISPLAY for displaying alv.

GO TO SE37.

TYPE : REUSE*. PRESS F4.

Reward points.

Regards,

Talwinder

Edited by: Talwinder Singh on Jan 5, 2008 4:39 PM

Edited by: Talwinder Singh on Jan 5, 2008 4:41 PM

Re: Alv Function modules

Former Member — Sat, 05 Jan 2008 11:10:07 GMT

ABAP List Viewer (ALV):

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

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

Parameters:

I. I_CALLBACK_PROGRAM

II. I_CALLBACK_PF_STATUS_SET

III. I_CALLBACK_USER_COMMAND

B. REUSE_ALV_BLOCK_LIST_APPEND

This function module adds the data to the block.

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

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.

C. REUSE_ALV_BLOCK_LIST_HS_APPEND

This function module is used for hierarchical sequential blocks.

D. REUSE_ALV_BLOCK_LIST_DISPLAY

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

Parameters : All the parameters are optional.

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

Regards.

Re: Alv Function modules

Former Member — Sat, 05 Jan 2008 11:11:35 GMT

Hi,

REUSE_ALV_COMMENTARY_WRITE List body comment block output

REUSE_ALV_EVENTS_GET Returns table of possible events for a list type

REUSE_ALV_EVENT_NAMES_GET Returns table of constant names of possible events for a list type

REUSE_ALV_FIELDCATALOG_MERGE Create field catalog from dictionary structure or internal table

REUSE_ALV_HIERSEQ_LIST_DISPLAY Hierarchical sequential list output

REUSE_ALV_LIST_DISPLAY Output a simple list (single line or several lines)

REUSE_ALV_GRID_DISPLAY Output a simple list (single line or several lines)

REUSE_ALV_LIST_LAYOUT_INFO_GET Read current ALV list information

REUSE_ALV_LIST_LAYOUT_INFO_SET Set current ALV list information

REUSE_ALV_LIST_WIDTH_GET

REUSE_ALV_POPUP_TO_SELECT List in dialog box to choose one or more entries (or display only)

These are the basic function.

You can get the full list by searching for all the functions starting with REUSE_ALV in SE37

Regards,

Srinivas Ch

Re: Alv Function modules

Former Member — Sat, 05 Jan 2008 11:17:18 GMT

This function module for check the variant exist

CALL FUNCTION 'REUSE_ALV_VARIANT_EXISTENCE'

Events for the ALV

CALL FUNCTION 'REUSE_ALV_EVENTS_GET'

This funcation module will diplay the top of the page

CALL FUNCTION 'REUSE_ALV_COMMENTARY_WRITE'

This function module for displaying the ALV in Grid report

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'

This function module for displaying the ALV in List report

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'

This function module to get the default variant

CALL FUNCTION 'REUSE_ALV_VARIANT_DEFAULT_GET'

This function module to get the default field catalog merge

CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'

To display variant selection dialog box using function module

'REUSE_ALV_VARIANT_F4'

This function modules for displaying the ALV in block List report

CALL FUNCTION 'REUSE_ALV_BLOCK_LIST_INIT " Header data

REUSE_ALV_BLOCK_LIST_APPEND " Item data

after appending the data to this above function modules we needs to pass final data to below Function module

CALL FUNCTION 'REUSE_ALV_BLOCK_LIST_DISPLAY.

*--Call the function module to display the ALV report in Hierachial and Sequential

CALL FUNCTION 'REUSE_ALV_HIERSEQ_LIST_DISPLAY'

Thanks,

Murali

Re: Alv Function modules

uwe_schieferstein — Sat, 05 Jan 2008 20:06:07 GMT

Hello Rajesh

Almost all function modules are mentioned thus far belong to the old-fashioned SLIS-based ALV lists.

In some cases they are still useful yet if you require a simple (non-hierarchical) ALV list then I would use REUSE_ALV_GRID_DISPLAY_LVC which is already very close to the much easier and more powerful OO-based ALV lists.

Regards,

Uwe