ABAP Select data from SAP table RMPUIOM into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RMPUIOM 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 RMPUIOM. 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 RMPUIOM 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_RMPUIOM TYPE STANDARD TABLE OF RMPUIOM,
      WA_RMPUIOM TYPE RMPUIOM,
      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: <RMPUIOM> TYPE RMPUIOM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMPUIOM
*  INTO TABLE @DATA(IT_RMPUIOM2).
*--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_RMPUIOM INDEX 1 INTO DATA(WA_RMPUIOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMPUIOM>-RPLEL = 1.
<RMPUIOM>-WERKS = 1.
<RMPUIOM>-MATNR = 1.
<RMPUIOM>-MAKTX = 1.
<RMPUIOM>-LGORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMPUIOM-PRVBE, sy-vline,
  WA_RMPUIOM-DISKZ, sy-vline,
  WA_RMPUIOM-XCHPF, sy-vline,
  WA_RMPUIOM-XCHAR, sy-vline,
  WA_RMPUIOM-BWTTY, sy-vline,
  WA_RMPUIOM-CHARG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMPUIOM 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_RMPUIOM 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_RMPUIOM INTO WA_RMPUIOM.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RMPUIOM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPUIOM-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RMPUIOM-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPUIOM-PSPEL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RMPUIOM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPUIOM-MEINS.
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_RMPUIOM_STR, 
RPLEL TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
LGORT TYPE STRING,
PRVBE TYPE STRING,
DISKZ TYPE STRING,
XCHPF TYPE STRING,
XCHAR TYPE STRING,
BWTTY TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPEL TYPE STRING,
BERKZ TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
LGPBE TYPE STRING,
LMINB TYPE STRING,
LBSTF TYPE STRING,
BDTER TYPE STRING,
SBTER TYPE STRING,
BDZTP TYPE STRING,
EQUAN TYPE STRING,
ERFME TYPE STRING,
BEAKZ TYPE STRING,
MARK TYPE STRING,
ELORT TYPE STRING,
BEAKZ_ICON TYPE STRING,
MEINS TYPE STRING,
WEMPF TYPE STRING,
TBPRI TYPE STRING,
ABLAD TYPE STRING,
LGPLQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMPUIOM_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_RMPUIOM_STR-RPLEL sy-vline 
WA_RMPUIOM_STR-WERKS sy-vline 
WA_RMPUIOM_STR-MATNR sy-vline 
WA_RMPUIOM_STR-MAKTX sy-vline 
WA_RMPUIOM_STR-LGORT sy-vline 
WA_RMPUIOM_STR-PRVBE sy-vline 
WA_RMPUIOM_STR-DISKZ sy-vline 
WA_RMPUIOM_STR-XCHPF sy-vline 
WA_RMPUIOM_STR-XCHAR sy-vline 
WA_RMPUIOM_STR-BWTTY sy-vline 
WA_RMPUIOM_STR-CHARG sy-vline 
WA_RMPUIOM_STR-SOBKZ sy-vline 
WA_RMPUIOM_STR-LIFNR sy-vline 
WA_RMPUIOM_STR-KDAUF sy-vline 
WA_RMPUIOM_STR-KDPOS sy-vline 
WA_RMPUIOM_STR-PSPEL sy-vline 
WA_RMPUIOM_STR-BERKZ sy-vline 
WA_RMPUIOM_STR-LGNUM sy-vline 
WA_RMPUIOM_STR-LGTYP sy-vline 
WA_RMPUIOM_STR-LGPLA sy-vline 
WA_RMPUIOM_STR-RSNUM sy-vline 
WA_RMPUIOM_STR-RSPOS sy-vline 
WA_RMPUIOM_STR-RSART sy-vline 
WA_RMPUIOM_STR-LGPBE sy-vline 
WA_RMPUIOM_STR-LMINB sy-vline 
WA_RMPUIOM_STR-LBSTF sy-vline 
WA_RMPUIOM_STR-BDTER sy-vline 
WA_RMPUIOM_STR-SBTER sy-vline 
WA_RMPUIOM_STR-BDZTP sy-vline 
WA_RMPUIOM_STR-EQUAN sy-vline 
WA_RMPUIOM_STR-ERFME sy-vline 
WA_RMPUIOM_STR-BEAKZ sy-vline 
WA_RMPUIOM_STR-MARK sy-vline 
WA_RMPUIOM_STR-ELORT sy-vline 
WA_RMPUIOM_STR-BEAKZ_ICON sy-vline 
WA_RMPUIOM_STR-MEINS sy-vline 
WA_RMPUIOM_STR-WEMPF sy-vline 
WA_RMPUIOM_STR-TBPRI sy-vline 
WA_RMPUIOM_STR-ABLAD sy-vline 
WA_RMPUIOM_STR-LGPLQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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