ABAP Select data from SAP table /SCWM/TWF_IL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/TWF_IL 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 /SCWM/TWF_IL. 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 /SCWM/TWF_IL 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_/SCWM/TWF_IL TYPE STANDARD TABLE OF /SCWM/TWF_IL,
      WA_/SCWM/TWF_IL TYPE /SCWM/TWF_IL,
      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: </SCWM/TWF_IL> TYPE /SCWM/TWF_IL.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/TWF_IL
  INTO TABLE IT_/SCWM/TWF_IL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/TWF_IL
*  INTO TABLE @DATA(IT_/SCWM/TWF_IL2).
*--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_/SCWM/TWF_IL INDEX 1 INTO DATA(WA_/SCWM/TWF_IL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/TWF_IL ASSIGNING </SCWM/TWF_IL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/TWF_IL>-MANDT = 1.
</SCWM/TWF_IL>-GUID = 1.
</SCWM/TWF_IL>-START_DATE = 1.
</SCWM/TWF_IL>-START_TIME = 1.
</SCWM/TWF_IL>-CREUSER = 1.

ENDLOOP.

LOOP AT IT_/SCWM/TWF_IL INTO WA_/SCWM/TWF_IL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/TWF_IL-WF_STARTED, sy-vline,
  WA_/SCWM/TWF_IL-WF_ENDED, sy-vline,
  WA_/SCWM/TWF_IL-INDLID, sy-vline,
  WA_/SCWM/TWF_IL-LGNUM, sy-vline,
  WA_/SCWM/TWF_IL-INDLNO, sy-vline,
  WA_/SCWM/TWF_IL-PROCS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/TWF_IL 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_/SCWM/TWF_IL 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_/SCWM/TWF_IL INTO WA_/SCWM/TWF_IL.


*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 ALPH0, internal->external for field INDLNO
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/TWF_IL-INDLNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/TWF_IL-INDLNO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field UNIT_T
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/TWF_IL-UNIT_T
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/TWF_IL-UNIT_T.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field START_TSTAMP
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/TWF_IL-START_TSTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/TWF_IL-START_TSTAMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTWH, internal->external for field END_TSTAMP
CALL FUNCTION 'CONVERSION_EXIT_TSTWH_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/TWF_IL-END_TSTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/TWF_IL-END_TSTAMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CRETST
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/TWF_IL-CRETST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/TWF_IL-CRETST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CHGTST
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/TWF_IL-CHGTST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/TWF_IL-CHGTST.
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_/SCWM/TWF_IL_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
START_DATE TYPE STRING,
START_TIME TYPE STRING,
CREUSER TYPE STRING,
WF_STARTED TYPE STRING,
WF_ENDED TYPE STRING,
INDLID TYPE STRING,
LGNUM TYPE STRING,
INDLNO TYPE STRING,
PROCS TYPE STRING,
PROCESSOR TYPE STRING,
ENTITLED TYPE STRING,
AAREA TYPE STRING,
STATUS TYPE STRING,
PLANDURA TYPE STRING,
UNIT_T TYPE STRING,
START_TSTAMP TYPE STRING,
END_TSTAMP TYPE STRING,
EXCCODE TYPE STRING,
BUSCON TYPE STRING,
EXEC_STEP TYPE STRING,
NOTE TYPE STRING,
ALLOCTERM TYPE STRING,
CREUSR TYPE STRING,
CRETST TYPE STRING,
CHGUSR TYPE STRING,
CHGTST TYPE STRING,
CHGMODE TYPE STRING,
DUMMY_ILT_DB TYPE STRING,
PROCS_TEXT TYPE STRING,
PROCESSOR_TEXT TYPE STRING,
START_DATE_ILT TYPE STRING,
START_TIME_ILT TYPE STRING,
END_DATE TYPE STRING,
END_TIME TYPE STRING,
TZONE TYPE STRING,
CRE_DATE TYPE STRING,
CRE_TIME TYPE STRING,
CHG_DATE TYPE STRING,
CHG_TIME TYPE STRING,
MODUS TYPE STRING,
NOTE_CREATED TYPE STRING,
ARCHIVED TYPE STRING,
DUMMY_ILT_DYN TYPE STRING,
EXC_BUSCON TYPE STRING,
EXC_TYPEID TYPE STRING,
EXEMODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/TWF_IL_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_/SCWM/TWF_IL_STR-MANDT sy-vline 
WA_/SCWM/TWF_IL_STR-GUID sy-vline 
WA_/SCWM/TWF_IL_STR-START_DATE sy-vline 
WA_/SCWM/TWF_IL_STR-START_TIME sy-vline 
WA_/SCWM/TWF_IL_STR-CREUSER sy-vline 
WA_/SCWM/TWF_IL_STR-WF_STARTED sy-vline 
WA_/SCWM/TWF_IL_STR-WF_ENDED sy-vline 
WA_/SCWM/TWF_IL_STR-INDLID sy-vline 
WA_/SCWM/TWF_IL_STR-LGNUM sy-vline 
WA_/SCWM/TWF_IL_STR-INDLNO sy-vline 
WA_/SCWM/TWF_IL_STR-PROCS sy-vline 
WA_/SCWM/TWF_IL_STR-PROCESSOR sy-vline 
WA_/SCWM/TWF_IL_STR-ENTITLED sy-vline 
WA_/SCWM/TWF_IL_STR-AAREA sy-vline 
WA_/SCWM/TWF_IL_STR-STATUS sy-vline 
WA_/SCWM/TWF_IL_STR-PLANDURA sy-vline 
WA_/SCWM/TWF_IL_STR-UNIT_T sy-vline 
WA_/SCWM/TWF_IL_STR-START_TSTAMP sy-vline 
WA_/SCWM/TWF_IL_STR-END_TSTAMP sy-vline 
WA_/SCWM/TWF_IL_STR-EXCCODE sy-vline 
WA_/SCWM/TWF_IL_STR-BUSCON sy-vline 
WA_/SCWM/TWF_IL_STR-EXEC_STEP sy-vline 
WA_/SCWM/TWF_IL_STR-NOTE sy-vline 
WA_/SCWM/TWF_IL_STR-ALLOCTERM sy-vline 
WA_/SCWM/TWF_IL_STR-CREUSR sy-vline 
WA_/SCWM/TWF_IL_STR-CRETST sy-vline 
WA_/SCWM/TWF_IL_STR-CHGUSR sy-vline 
WA_/SCWM/TWF_IL_STR-CHGTST sy-vline 
WA_/SCWM/TWF_IL_STR-CHGMODE sy-vline 
WA_/SCWM/TWF_IL_STR-DUMMY_ILT_DB sy-vline 
WA_/SCWM/TWF_IL_STR-PROCS_TEXT sy-vline 
WA_/SCWM/TWF_IL_STR-PROCESSOR_TEXT sy-vline 
WA_/SCWM/TWF_IL_STR-START_DATE_ILT sy-vline 
WA_/SCWM/TWF_IL_STR-START_TIME_ILT sy-vline 
WA_/SCWM/TWF_IL_STR-END_DATE sy-vline 
WA_/SCWM/TWF_IL_STR-END_TIME sy-vline 
WA_/SCWM/TWF_IL_STR-TZONE sy-vline 
WA_/SCWM/TWF_IL_STR-CRE_DATE sy-vline 
WA_/SCWM/TWF_IL_STR-CRE_TIME sy-vline 
WA_/SCWM/TWF_IL_STR-CHG_DATE sy-vline 
WA_/SCWM/TWF_IL_STR-CHG_TIME sy-vline 
WA_/SCWM/TWF_IL_STR-MODUS sy-vline 
WA_/SCWM/TWF_IL_STR-NOTE_CREATED sy-vline 
WA_/SCWM/TWF_IL_STR-ARCHIVED sy-vline 
WA_/SCWM/TWF_IL_STR-DUMMY_ILT_DYN sy-vline 
WA_/SCWM/TWF_IL_STR-EXC_BUSCON sy-vline 
WA_/SCWM/TWF_IL_STR-EXC_TYPEID sy-vline 
WA_/SCWM/TWF_IL_STR-EXEMODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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