ABAP Select data from SAP table MPES_RTGV_ORD_CMP_ATTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPES_RTGV_ORD_CMP_ATTR
*  INTO TABLE @DATA(IT_MPES_RTGV_ORD_CMP_ATTR2).
*--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_MPES_RTGV_ORD_CMP_ATTR INDEX 1 INTO DATA(WA_MPES_RTGV_ORD_CMP_ATTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPES_RTGV_ORD_CMP_ATTR>-IDNRK = 1.
<MPES_RTGV_ORD_CMP_ATTR>-POSTP = 1.
<MPES_RTGV_ORD_CMP_ATTR>-POSNR = 1.
<MPES_RTGV_ORD_CMP_ATTR>-MATKL = 1.
<MPES_RTGV_ORD_CMP_ATTR>-MEINS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPES_RTGV_ORD_CMP_ATTR-MENGE, sy-vline,
  WA_MPES_RTGV_ORD_CMP_ATTR-FMENG, sy-vline,
  WA_MPES_RTGV_ORD_CMP_ATTR-AUSCH, sy-vline,
  WA_MPES_RTGV_ORD_CMP_ATTR-AVOAU, sy-vline,
  WA_MPES_RTGV_ORD_CMP_ATTR-NETAU, sy-vline,
  WA_MPES_RTGV_ORD_CMP_ATTR-SCHGT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPES_RTGV_ORD_CMP_ATTR 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_MPES_RTGV_ORD_CMP_ATTR 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_MPES_RTGV_ORD_CMP_ATTR INTO WA_MPES_RTGV_ORD_CMP_ATTR.


*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 IDNRK
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MPES_RTGV_ORD_CMP_ATTR-IDNRK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_RTGV_ORD_CMP_ATTR-IDNRK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MPES_RTGV_ORD_CMP_ATTR-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_RTGV_ORD_CMP_ATTR-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MPES_RTGV_ORD_CMP_ATTR-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_RTGV_ORD_CMP_ATTR-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_MPES_RTGV_ORD_CMP_ATTR_STR, 
IDNRK TYPE STRING,
POSTP TYPE STRING,
POSNR TYPE STRING,
MATKL TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
FMENG TYPE STRING,
AUSCH TYPE STRING,
AVOAU TYPE STRING,
NETAU TYPE STRING,
SCHGT TYPE STRING,
PSWRK TYPE STRING,
LGORT TYPE STRING,
ITSOB TYPE STRING,
PRVBE TYPE STRING,
INSMK TYPE STRING,
STVKN_VERSN TYPE STRING,
ASSEMBLY_TYPE TYPE STRING,
OAN_ELEMENT_NUMBER TYPE STRING,
HAS_BOM_ITEM_INSTANCES TYPE STRING,
DUMMY_STPO_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPES_RTGV_ORD_CMP_ATTR_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_MPES_RTGV_ORD_CMP_ATTR_STR-IDNRK sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-POSTP sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-POSNR sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-MATKL sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-MEINS sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-MENGE sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-FMENG sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-AUSCH sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-AVOAU sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-NETAU sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-SCHGT sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-PSWRK sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-LGORT sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-ITSOB sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-PRVBE sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-INSMK sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-STVKN_VERSN sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-ASSEMBLY_TYPE sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-OAN_ELEMENT_NUMBER sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-HAS_BOM_ITEM_INSTANCES sy-vline 
WA_MPES_RTGV_ORD_CMP_ATTR_STR-DUMMY_STPO_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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