ABAP Select data from SAP table TRMWUL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRMWUL
*  INTO TABLE @DATA(IT_TRMWUL2).
*--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_TRMWUL INDEX 1 INTO DATA(WA_TRMWUL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRMWUL>-SLANGUAGE = 1.
<TRMWUL>-TLANGUAGE = 1.
<TRMWUL>-SHASH = 1.
<TRMWUL>-STABID = 1.
<TRMWUL>-SHASHCNFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRMWUL-THASH, sy-vline,
  WA_TRMWUL-TTABID, sy-vline,
  WA_TRMWUL-THASHCNFL, sy-vline,
  WA_TRMWUL-OBJUUID, sy-vline,
  WA_TRMWUL-STATUS, sy-vline,
  WA_TRMWUL-APPLIC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRMWUL 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_TRMWUL 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_TRMWUL INTO WA_TRMWUL.


*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 ISOLA, internal->external for field SLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRMWUL-SLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRMWUL-SLANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRMWUL-TLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRMWUL-TLANGUAGE.
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_TRMWUL_STR, 
SLANGUAGE TYPE STRING,
TLANGUAGE TYPE STRING,
SHASH TYPE STRING,
STABID TYPE STRING,
SHASHCNFL TYPE STRING,
THASH TYPE STRING,
TTABID TYPE STRING,
THASHCNFL TYPE STRING,
OBJUUID TYPE STRING,
STATUS TYPE STRING,
APPLIC TYPE STRING,
OCCURS TYPE STRING,
UPDFLAG TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRMWUL_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_TRMWUL_STR-SLANGUAGE sy-vline 
WA_TRMWUL_STR-TLANGUAGE sy-vline 
WA_TRMWUL_STR-SHASH sy-vline 
WA_TRMWUL_STR-STABID sy-vline 
WA_TRMWUL_STR-SHASHCNFL sy-vline 
WA_TRMWUL_STR-THASH sy-vline 
WA_TRMWUL_STR-TTABID sy-vline 
WA_TRMWUL_STR-THASHCNFL sy-vline 
WA_TRMWUL_STR-OBJUUID sy-vline 
WA_TRMWUL_STR-STATUS sy-vline 
WA_TRMWUL_STR-APPLIC sy-vline 
WA_TRMWUL_STR-OCCURS sy-vline 
WA_TRMWUL_STR-UPDFLAG sy-vline 
WA_TRMWUL_STR-FLAG1 sy-vline 
WA_TRMWUL_STR-FLAG2 sy-vline 
WA_TRMWUL_STR-FLAG3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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