ABAP Select data from SAP table WFMV_DALWDSHFTLN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFMV_DALWDSHFTLN
*  INTO TABLE @DATA(IT_WFMV_DALWDSHFTLN2).
*--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_WFMV_DALWDSHFTLN INDEX 1 INTO DATA(WA_WFMV_DALWDSHFTLN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFMV_DALWDSHFTLN>-MANDT = 1.
<WFMV_DALWDSHFTLN>-LOCATION_TYPE = 1.
<WFMV_DALWDSHFTLN>-DISALLOWED_SHIFT = 1.
<WFMV_DALWDSHFTLN>-START_DATE = 1.
<WFMV_DALWDSHFTLN>-END_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFMV_DALWDSHFTLN-SNAME, sy-vline,
  WA_WFMV_DALWDSHFTLN-LENGTH, sy-vline,
  WA_WFMV_DALWDSHFTLN-LENGTH_UNIT, sy-vline,
  WA_WFMV_DALWDSHFTLN-TIME_START, sy-vline,
  WA_WFMV_DALWDSHFTLN-TIME_END, sy-vline,
  WA_WFMV_DALWDSHFTLN-DAY1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFMV_DALWDSHFTLN 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_WFMV_DALWDSHFTLN 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_WFMV_DALWDSHFTLN INTO WA_WFMV_DALWDSHFTLN.


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

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

*Conversion exit CUNIT, internal->external for field LENGTH_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WFMV_DALWDSHFTLN-LENGTH_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFMV_DALWDSHFTLN-LENGTH_UNIT.
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_WFMV_DALWDSHFTLN_STR, 
MANDT TYPE STRING,
LOCATION_TYPE TYPE STRING,
DISALLOWED_SHIFT TYPE STRING,
START_DATE TYPE STRING,
END_DATE TYPE STRING,
SNAME TYPE STRING,
LENGTH TYPE STRING,
LENGTH_UNIT TYPE STRING,
TIME_START TYPE STRING,
TIME_END TYPE STRING,
DAY1 TYPE STRING,
DAY2 TYPE STRING,
DAY3 TYPE STRING,
DAY4 TYPE STRING,
DAY5 TYPE STRING,
DAY6 TYPE STRING,
DAY7 TYPE STRING,
LNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFMV_DALWDSHFTLN_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_WFMV_DALWDSHFTLN_STR-MANDT sy-vline 
WA_WFMV_DALWDSHFTLN_STR-LOCATION_TYPE sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DISALLOWED_SHIFT sy-vline 
WA_WFMV_DALWDSHFTLN_STR-START_DATE sy-vline 
WA_WFMV_DALWDSHFTLN_STR-END_DATE sy-vline 
WA_WFMV_DALWDSHFTLN_STR-SNAME sy-vline 
WA_WFMV_DALWDSHFTLN_STR-LENGTH sy-vline 
WA_WFMV_DALWDSHFTLN_STR-LENGTH_UNIT sy-vline 
WA_WFMV_DALWDSHFTLN_STR-TIME_START sy-vline 
WA_WFMV_DALWDSHFTLN_STR-TIME_END sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DAY1 sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DAY2 sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DAY3 sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DAY4 sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DAY5 sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DAY6 sy-vline 
WA_WFMV_DALWDSHFTLN_STR-DAY7 sy-vline 
WA_WFMV_DALWDSHFTLN_STR-LNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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