ABAP Select data from SAP table TMSQWLFH into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TMSQWLFH
*  INTO TABLE @DATA(IT_TMSQWLFH2).
*--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_TMSQWLFH INDEX 1 INTO DATA(WA_TMSQWLFH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TMSQWLFH>-DOMNAM = 1.
<TMSQWLFH>-SYSNAM = 1.
<TMSQWLFH>-TRKORR = 1.
<TMSQWLFH>-CLIENT = 1.
<TMSQWLFH>-AS4DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TMSQWLFH-AS4TIME, sy-vline,
  WA_TMSQWLFH-STEP, sy-vline,
  WA_TMSQWLFH-QAFLAG, sy-vline,
  WA_TMSQWLFH-USRAKT, sy-vline,
  WA_TMSQWLFH-DATAKT, sy-vline,
  WA_TMSQWLFH-TIMAKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TMSQWLFH 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_TMSQWLFH 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_TMSQWLFH INTO WA_TMSQWLFH.


*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_TMSQWLFH_STR, 
DOMNAM TYPE STRING,
SYSNAM TYPE STRING,
TRKORR TYPE STRING,
CLIENT TYPE STRING,
AS4DATE TYPE STRING,
AS4TIME TYPE STRING,
STEP TYPE STRING,
QAFLAG TYPE STRING,
USRAKT TYPE STRING,
DATAKT TYPE STRING,
TIMAKT TYPE STRING,
NEW_IMPORT TYPE STRING,
DELETED TYPE STRING,
NOTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TMSQWLFH_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_TMSQWLFH_STR-DOMNAM sy-vline 
WA_TMSQWLFH_STR-SYSNAM sy-vline 
WA_TMSQWLFH_STR-TRKORR sy-vline 
WA_TMSQWLFH_STR-CLIENT sy-vline 
WA_TMSQWLFH_STR-AS4DATE sy-vline 
WA_TMSQWLFH_STR-AS4TIME sy-vline 
WA_TMSQWLFH_STR-STEP sy-vline 
WA_TMSQWLFH_STR-QAFLAG sy-vline 
WA_TMSQWLFH_STR-USRAKT sy-vline 
WA_TMSQWLFH_STR-DATAKT sy-vline 
WA_TMSQWLFH_STR-TIMAKT sy-vline 
WA_TMSQWLFH_STR-NEW_IMPORT sy-vline 
WA_TMSQWLFH_STR-DELETED sy-vline 
WA_TMSQWLFH_STR-NOTE sy-vline      INTO ld_text SEPARATED BY SPACE.

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