ABAP Select data from SAP table /SCWM/RL03A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/RL03A 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/RL03A. 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/RL03A 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/RL03A TYPE STANDARD TABLE OF /SCWM/RL03A,
      WA_/SCWM/RL03A TYPE /SCWM/RL03A,
      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/RL03A> TYPE /SCWM/RL03A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SCWM/RL03A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/RL03A
  INTO TABLE IT_/SCWM/RL03A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/RL03A
*  INTO TABLE @DATA(IT_/SCWM/RL03A2).
*--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/RL03A INDEX 1 INTO DATA(WA_/SCWM/RL03A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/RL03A ASSIGNING </SCWM/RL03A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/RL03A>-ANFME = 1.
</SCWM/RL03A>-ANFML = 1.
</SCWM/RL03A>-SQUIT = 1.
</SCWM/RL03A>-INACTIV = 1.
</SCWM/RL03A>-NOROU = 1.

ENDLOOP.

LOOP AT IT_/SCWM/RL03A INTO WA_/SCWM/RL03A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/RL03A-VORGA, sy-vline,
  WA_/SCWM/RL03A-CRETO, sy-vline,
  WA_/SCWM/RL03A-WTCODE, sy-vline,
  WA_/SCWM/RL03A-VERBU, sy-vline,
  WA_/SCWM/RL03A-PROTO, sy-vline,
  WA_/SCWM/RL03A-BECHA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/RL03A 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/RL03A 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/RL03A INTO WA_/SCWM/RL03A.


*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 DTU_NUM2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/RL03A-DTU_NUM2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/RL03A-DTU_NUM2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit HUID, internal->external for field NLENR2
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/RL03A-NLENR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/RL03A-NLENR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit HUID, internal->external for field VLENR2
CALL FUNCTION 'CONVERSION_EXIT_HUID_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/RL03A-VLENR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/RL03A-VLENR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field OPUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/RL03A-OPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/RL03A-OPUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/RL03A-RUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/RL03A-RUOM.
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/RL03A_STR, 
ANFME TYPE STRING,
ANFML TYPE STRING,
SQUIT TYPE STRING,
INACTIV TYPE STRING,
NOROU TYPE STRING,
VORGA TYPE STRING,
CRETO TYPE STRING,
WTCODE TYPE STRING,
VERBU TYPE STRING,
PROTO TYPE STRING,
BECHA TYPE STRING,
NLTYP2 TYPE STRING,
NLBER2 TYPE STRING,
NLPLA2 TYPE STRING,
DRSRC2 TYPE STRING,
DLOGPOS TYPE STRING,
DTU_NUM2 TYPE STRING,
D_CHG TYPE STRING,
NLENR2 TYPE STRING,
DGUID_HU2 TYPE STRING,
NDNEW TYPE STRING,
VDNEW TYPE STRING,
VLENR2 TYPE STRING,
SGUID_HU2 TYPE STRING,
HUENT TYPE STRING,
MOVEHU TYPE STRING,
OPUNIT TYPE STRING,
NOLOCK TYPE STRING,
PAPOS TYPE STRING,
BATCHID2 TYPE STRING,
VFDAT2 TYPE STRING,
WDATU2 TYPE STRING,
COO2 TYPE STRING,
MAT_CHECK TYPE STRING,
SUBST TYPE STRING,
WAVE_RELEASE TYPE STRING,
BSELCRIT TYPE STRING,
CLASSTYPE TYPE STRING,
CLASS TYPE STRING,
STATUS TYPE STRING,
T_SELCRIT_NUM TYPE STRING,
T_SELCRIT_CHAR TYPE STRING,
T_SELCRIT_CURR TYPE STRING,
RUOM TYPE STRING,
ERROR TYPE STRING,
PLC TYPE STRING,
CP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/RL03A_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/RL03A_STR-ANFME sy-vline 
WA_/SCWM/RL03A_STR-ANFML sy-vline 
WA_/SCWM/RL03A_STR-SQUIT sy-vline 
WA_/SCWM/RL03A_STR-INACTIV sy-vline 
WA_/SCWM/RL03A_STR-NOROU sy-vline 
WA_/SCWM/RL03A_STR-VORGA sy-vline 
WA_/SCWM/RL03A_STR-CRETO sy-vline 
WA_/SCWM/RL03A_STR-WTCODE sy-vline 
WA_/SCWM/RL03A_STR-VERBU sy-vline 
WA_/SCWM/RL03A_STR-PROTO sy-vline 
WA_/SCWM/RL03A_STR-BECHA sy-vline 
WA_/SCWM/RL03A_STR-NLTYP2 sy-vline 
WA_/SCWM/RL03A_STR-NLBER2 sy-vline 
WA_/SCWM/RL03A_STR-NLPLA2 sy-vline 
WA_/SCWM/RL03A_STR-DRSRC2 sy-vline 
WA_/SCWM/RL03A_STR-DLOGPOS sy-vline 
WA_/SCWM/RL03A_STR-DTU_NUM2 sy-vline 
WA_/SCWM/RL03A_STR-D_CHG sy-vline 
WA_/SCWM/RL03A_STR-NLENR2 sy-vline 
WA_/SCWM/RL03A_STR-DGUID_HU2 sy-vline 
WA_/SCWM/RL03A_STR-NDNEW sy-vline 
WA_/SCWM/RL03A_STR-VDNEW sy-vline 
WA_/SCWM/RL03A_STR-VLENR2 sy-vline 
WA_/SCWM/RL03A_STR-SGUID_HU2 sy-vline 
WA_/SCWM/RL03A_STR-HUENT sy-vline 
WA_/SCWM/RL03A_STR-MOVEHU sy-vline 
WA_/SCWM/RL03A_STR-OPUNIT sy-vline 
WA_/SCWM/RL03A_STR-NOLOCK sy-vline 
WA_/SCWM/RL03A_STR-PAPOS sy-vline 
WA_/SCWM/RL03A_STR-BATCHID2 sy-vline 
WA_/SCWM/RL03A_STR-VFDAT2 sy-vline 
WA_/SCWM/RL03A_STR-WDATU2 sy-vline 
WA_/SCWM/RL03A_STR-COO2 sy-vline 
WA_/SCWM/RL03A_STR-MAT_CHECK sy-vline 
WA_/SCWM/RL03A_STR-SUBST sy-vline 
WA_/SCWM/RL03A_STR-WAVE_RELEASE sy-vline 
WA_/SCWM/RL03A_STR-BSELCRIT sy-vline 
WA_/SCWM/RL03A_STR-CLASSTYPE sy-vline 
WA_/SCWM/RL03A_STR-CLASS sy-vline 
WA_/SCWM/RL03A_STR-STATUS sy-vline 
WA_/SCWM/RL03A_STR-T_SELCRIT_NUM sy-vline 
WA_/SCWM/RL03A_STR-T_SELCRIT_CHAR sy-vline 
WA_/SCWM/RL03A_STR-T_SELCRIT_CURR sy-vline 
WA_/SCWM/RL03A_STR-RUOM sy-vline 
WA_/SCWM/RL03A_STR-ERROR sy-vline 
WA_/SCWM/RL03A_STR-PLC sy-vline 
WA_/SCWM/RL03A_STR-CP sy-vline      INTO ld_text SEPARATED BY SPACE.

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