ABAP Select data from SAP table SAPWLLMINL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SAPWLLMINL 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 SAPWLLMINL. 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 SAPWLLMINL 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_SAPWLLMINL TYPE STANDARD TABLE OF SAPWLLMINL,
      WA_SAPWLLMINL TYPE SAPWLLMINL,
      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: <SAPWLLMINL> TYPE SAPWLLMINL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SAPWLLMINL
*  INTO TABLE @DATA(IT_SAPWLLMINL2).
*--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_SAPWLLMINL INDEX 1 INTO DATA(WA_SAPWLLMINL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SAPWLLMINL>-SYSID = 1.
<SAPWLLMINL>-INSTANCE = 1.
<SAPWLLMINL>-COMPTYPE = 1.
<SAPWLLMINL>-HOSTSHORT = 1.
<SAPWLLMINL>-FRECDAY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SAPWLLMINL-FRECTIME, sy-vline,
  WA_SAPWLLMINL-LRECDAY, sy-vline,
  WA_SAPWLLMINL-LRECTIME, sy-vline,
  WA_SAPWLLMINL-MANDT, sy-vline,
  WA_SAPWLLMINL-USER, sy-vline,
  WA_SAPWLLMINL-WPNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SAPWLLMINL 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_SAPWLLMINL 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_SAPWLLMINL INTO WA_SAPWLLMINL.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_SAPWLLMINL_STR, 
SYSID TYPE STRING,
INSTANCE TYPE STRING,
COMPTYPE TYPE STRING,
HOSTSHORT TYPE STRING,
FRECDAY TYPE STRING,
FRECTIME TYPE STRING,
LRECDAY TYPE STRING,
LRECTIME TYPE STRING,
MANDT TYPE STRING,
USER TYPE STRING,
WPNR TYPE STRING,
TIMERES TYPE STRING,
TTPWP TYPE STRING,
TCODEWDYN TYPE STRING,
TERMINAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SAPWLLMINL_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_SAPWLLMINL_STR-SYSID sy-vline 
WA_SAPWLLMINL_STR-INSTANCE sy-vline 
WA_SAPWLLMINL_STR-COMPTYPE sy-vline 
WA_SAPWLLMINL_STR-HOSTSHORT sy-vline 
WA_SAPWLLMINL_STR-FRECDAY sy-vline 
WA_SAPWLLMINL_STR-FRECTIME sy-vline 
WA_SAPWLLMINL_STR-LRECDAY sy-vline 
WA_SAPWLLMINL_STR-LRECTIME sy-vline 
WA_SAPWLLMINL_STR-MANDT sy-vline 
WA_SAPWLLMINL_STR-USER sy-vline 
WA_SAPWLLMINL_STR-WPNR sy-vline 
WA_SAPWLLMINL_STR-TIMERES sy-vline 
WA_SAPWLLMINL_STR-TTPWP sy-vline 
WA_SAPWLLMINL_STR-TCODEWDYN sy-vline 
WA_SAPWLLMINL_STR-TERMINAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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