ABAP Select data from SAP table RLWMP_PC3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RLWMP_PC3 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 RLWMP_PC3. 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 RLWMP_PC3 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_RLWMP_PC3 TYPE STANDARD TABLE OF RLWMP_PC3,
      WA_RLWMP_PC3 TYPE RLWMP_PC3,
      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: <RLWMP_PC3> TYPE RLWMP_PC3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RLWMP_PC3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RLWMP_PC3
  INTO TABLE IT_RLWMP_PC3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLWMP_PC3
*  INTO TABLE @DATA(IT_RLWMP_PC32).
*--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_RLWMP_PC3 INDEX 1 INTO DATA(WA_RLWMP_PC32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RLWMP_PC3 ASSIGNING <RLWMP_PC3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLWMP_PC3>-LGBER = 1.
<RLWMP_PC3>-PLAUF = 1.
<RLWMP_PC3>-SKZSI = 1.
<RLWMP_PC3>-ANZQU = 1.
<RLWMP_PC3>-MAXQU = 1.

ENDLOOP.

LOOP AT IT_RLWMP_PC3 INTO WA_RLWMP_PC3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLWMP_PC3-ANZLE, sy-vline,
  WA_RLWMP_PC3-MAXLE, sy-vline,
  WA_RLWMP_PC3-KZDYN, sy-vline,
  WA_RLWMP_PC3-LGEWI, sy-vline,
  WA_RLWMP_PC3-RDATU, sy-vline,
  WA_RLWMP_PC3-KZINV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLWMP_PC3 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_RLWMP_PC3 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_RLWMP_PC3 INTO WA_RLWMP_PC3.


*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 WENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLWMP_PC3-WENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLWMP_PC3-WENUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IVNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLWMP_PC3-IVNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLWMP_PC3-IVNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLWMP_PC3-BENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLWMP_PC3-BENUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_RLWMP_PC3-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLWMP_PC3-LENUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field QPLOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLWMP_PC3-QPLOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLWMP_PC3-QPLOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLWMP_PC3-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLWMP_PC3-GEWEI.
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_RLWMP_PC3_STR, 
LGBER TYPE STRING,
PLAUF TYPE STRING,
SKZSI TYPE STRING,
ANZQU TYPE STRING,
MAXQU TYPE STRING,
ANZLE TYPE STRING,
MAXLE TYPE STRING,
KZDYN TYPE STRING,
LGEWI TYPE STRING,
RDATU TYPE STRING,
KZINV TYPE STRING,
IDATU TYPE STRING,
IVIVO TYPE STRING,
KZLER TYPE STRING,
KZVOL TYPE STRING,
SORLP TYPE STRING,
BRAND TYPE STRING,
UNAME TYPE STRING,
LAEDT TYPE STRING,
LKAPV TYPE STRING,
RKAPV TYPE STRING,
REIHF TYPE STRING,
VERIF TYPE STRING,
BESTQ TYPE STRING,
SKZUE TYPE STRING,
SKZUA TYPE STRING,
SKZSE TYPE STRING,
SKZSA TYPE STRING,
SPGRU TYPE STRING,
ZEUGN TYPE STRING,
BDATU TYPE STRING,
BZEIT TYPE STRING,
BTANR TYPE STRING,
BTAPS TYPE STRING,
EZEIT TYPE STRING,
WENUM TYPE STRING,
WEPOS TYPE STRING,
IVNUM TYPE STRING,
IVPOS TYPE STRING,
BENUM TYPE STRING,
LENUM TYPE STRING,
QPLOS TYPE STRING,
VFDAT TYPE STRING,
QKAPV TYPE STRING,
KOBER TYPE STRING,
VIRGO TYPE STRING,
TRAME TYPE STRING,
PLPOS TYPE STRING,
EDATU TYPE STRING,
ZDATU TYPE STRING,
WDATU TYPE STRING,
LETYP TYPE STRING,
GESME TYPE STRING,
AUSME TYPE STRING,
MGEWI TYPE STRING,
GEWEI TYPE STRING,
TBNUM TYPE STRING,
BETYP TYPE STRING,
LPTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLWMP_PC3_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_RLWMP_PC3_STR-LGBER sy-vline 
WA_RLWMP_PC3_STR-PLAUF sy-vline 
WA_RLWMP_PC3_STR-SKZSI sy-vline 
WA_RLWMP_PC3_STR-ANZQU sy-vline 
WA_RLWMP_PC3_STR-MAXQU sy-vline 
WA_RLWMP_PC3_STR-ANZLE sy-vline 
WA_RLWMP_PC3_STR-MAXLE sy-vline 
WA_RLWMP_PC3_STR-KZDYN sy-vline 
WA_RLWMP_PC3_STR-LGEWI sy-vline 
WA_RLWMP_PC3_STR-RDATU sy-vline 
WA_RLWMP_PC3_STR-KZINV sy-vline 
WA_RLWMP_PC3_STR-IDATU sy-vline 
WA_RLWMP_PC3_STR-IVIVO sy-vline 
WA_RLWMP_PC3_STR-KZLER sy-vline 
WA_RLWMP_PC3_STR-KZVOL sy-vline 
WA_RLWMP_PC3_STR-SORLP sy-vline 
WA_RLWMP_PC3_STR-BRAND sy-vline 
WA_RLWMP_PC3_STR-UNAME sy-vline 
WA_RLWMP_PC3_STR-LAEDT sy-vline 
WA_RLWMP_PC3_STR-LKAPV sy-vline 
WA_RLWMP_PC3_STR-RKAPV sy-vline 
WA_RLWMP_PC3_STR-REIHF sy-vline 
WA_RLWMP_PC3_STR-VERIF sy-vline 
WA_RLWMP_PC3_STR-BESTQ sy-vline 
WA_RLWMP_PC3_STR-SKZUE sy-vline 
WA_RLWMP_PC3_STR-SKZUA sy-vline 
WA_RLWMP_PC3_STR-SKZSE sy-vline 
WA_RLWMP_PC3_STR-SKZSA sy-vline 
WA_RLWMP_PC3_STR-SPGRU sy-vline 
WA_RLWMP_PC3_STR-ZEUGN sy-vline 
WA_RLWMP_PC3_STR-BDATU sy-vline 
WA_RLWMP_PC3_STR-BZEIT sy-vline 
WA_RLWMP_PC3_STR-BTANR sy-vline 
WA_RLWMP_PC3_STR-BTAPS sy-vline 
WA_RLWMP_PC3_STR-EZEIT sy-vline 
WA_RLWMP_PC3_STR-WENUM sy-vline 
WA_RLWMP_PC3_STR-WEPOS sy-vline 
WA_RLWMP_PC3_STR-IVNUM sy-vline 
WA_RLWMP_PC3_STR-IVPOS sy-vline 
WA_RLWMP_PC3_STR-BENUM sy-vline 
WA_RLWMP_PC3_STR-LENUM sy-vline 
WA_RLWMP_PC3_STR-QPLOS sy-vline 
WA_RLWMP_PC3_STR-VFDAT sy-vline 
WA_RLWMP_PC3_STR-QKAPV sy-vline 
WA_RLWMP_PC3_STR-KOBER sy-vline 
WA_RLWMP_PC3_STR-VIRGO sy-vline 
WA_RLWMP_PC3_STR-TRAME sy-vline 
WA_RLWMP_PC3_STR-PLPOS sy-vline 
WA_RLWMP_PC3_STR-EDATU sy-vline 
WA_RLWMP_PC3_STR-ZDATU sy-vline 
WA_RLWMP_PC3_STR-WDATU sy-vline 
WA_RLWMP_PC3_STR-LETYP sy-vline 
WA_RLWMP_PC3_STR-GESME sy-vline 
WA_RLWMP_PC3_STR-AUSME sy-vline 
WA_RLWMP_PC3_STR-MGEWI sy-vline 
WA_RLWMP_PC3_STR-GEWEI sy-vline 
WA_RLWMP_PC3_STR-TBNUM sy-vline 
WA_RLWMP_PC3_STR-BETYP sy-vline 
WA_RLWMP_PC3_STR-LPTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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