ABAP Select data from SAP table ASLM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ASLM table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ASLM. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ASLM table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ASLM TYPE STANDARD TABLE OF ASLM,
      WA_ASLM TYPE ASLM,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ASLM> TYPE ASLM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ASLM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ASLM
  INTO TABLE IT_ASLM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ASLM
*  INTO TABLE @DATA(IT_ASLM2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ASLM INDEX 1 INTO DATA(WA_ASLM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ASLM ASSIGNING <ASLM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ASLM>-QUART = 1.
<ASLM>-AJAHR = 1.
<ASLM>-DATE1 = 1.
<ASLM>-DATE2 = 1.
<ASLM>-NUMMR = 1.

ENDLOOP.

LOOP AT IT_ASLM INTO WA_ASLM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ASLM-STCEG, sy-vline,
  WA_ASLM-DMSHB, sy-vline,
  WA_ASLM-DMSHV, sy-vline,
  WA_ASLM-LVIND, sy-vline,
  WA_ASLM-DREIE, sy-vline,
  WA_ASLM-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ASLM you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ASLM TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ASLM INTO WA_ASLM.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit GJAHR, internal->external for field AJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ASLM-AJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASLM-AJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field DMSHB
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_ASLM-DMSHB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASLM-DMSHB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ASLM-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASLM-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field TOTAL
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ASLM-TOTAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASLM-TOTAL.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ASLM_STR, 
QUART TYPE STRING,
AJAHR TYPE STRING,
DATE1 TYPE STRING,
DATE2 TYPE STRING,
NUMMR TYPE STRING,
STCEG TYPE STRING,
DMSHB TYPE STRING,
DMSHV TYPE STRING,
LVIND TYPE STRING,
DREIE TYPE STRING,
KUNNR TYPE STRING,
NAME1 TYPE STRING,
STRAS TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
ZULV1 TYPE STRING,
ZULV2 TYPE STRING,
ZULV3 TYPE STRING,
NOPAG TYPE STRING,
NOCUS TYPE STRING,
TOTAL TYPE STRING,
TOTAV TYPE STRING,
BEIND TYPE STRING,
GBNUM TYPE STRING,
GBSHB TYPE STRING,
GBIND TYPE STRING,
GBPAG TYPE STRING,
GBCUS TYPE STRING,
PEURO TYPE STRING,
CORDE TYPE STRING,
MONAT TYPE STRING,
PERTYP TYPE STRING,
XEGSRV TYPE STRING,
DEIND TYPE STRING,
XEGCOS TYPE STRING,
STCEG_ORIG TYPE STRING,
NAME1_ORIG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ASLM_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ASLM_STR-QUART sy-vline 
WA_ASLM_STR-AJAHR sy-vline 
WA_ASLM_STR-DATE1 sy-vline 
WA_ASLM_STR-DATE2 sy-vline 
WA_ASLM_STR-NUMMR sy-vline 
WA_ASLM_STR-STCEG sy-vline 
WA_ASLM_STR-DMSHB sy-vline 
WA_ASLM_STR-DMSHV sy-vline 
WA_ASLM_STR-LVIND sy-vline 
WA_ASLM_STR-DREIE sy-vline 
WA_ASLM_STR-KUNNR sy-vline 
WA_ASLM_STR-NAME1 sy-vline 
WA_ASLM_STR-STRAS sy-vline 
WA_ASLM_STR-PSTLZ sy-vline 
WA_ASLM_STR-ORT01 sy-vline 
WA_ASLM_STR-ZULV1 sy-vline 
WA_ASLM_STR-ZULV2 sy-vline 
WA_ASLM_STR-ZULV3 sy-vline 
WA_ASLM_STR-NOPAG sy-vline 
WA_ASLM_STR-NOCUS sy-vline 
WA_ASLM_STR-TOTAL sy-vline 
WA_ASLM_STR-TOTAV sy-vline 
WA_ASLM_STR-BEIND sy-vline 
WA_ASLM_STR-GBNUM sy-vline 
WA_ASLM_STR-GBSHB sy-vline 
WA_ASLM_STR-GBIND sy-vline 
WA_ASLM_STR-GBPAG sy-vline 
WA_ASLM_STR-GBCUS sy-vline 
WA_ASLM_STR-PEURO sy-vline 
WA_ASLM_STR-CORDE sy-vline 
WA_ASLM_STR-MONAT sy-vline 
WA_ASLM_STR-PERTYP sy-vline 
WA_ASLM_STR-XEGSRV sy-vline 
WA_ASLM_STR-DEIND sy-vline 
WA_ASLM_STR-XEGCOS sy-vline 
WA_ASLM_STR-STCEG_ORIG sy-vline 
WA_ASLM_STR-NAME1_ORIG sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.