ABAP Select data from SAP table MPES_RTGV_MTB_KEY_EXT_MAP 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_MTB_KEY_EXT_MAP 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_MTB_KEY_EXT_MAP. 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_MTB_KEY_EXT_MAP 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_MTB_KEY_EXT_MAP TYPE STANDARD TABLE OF MPES_RTGV_MTB_KEY_EXT_MAP,
      WA_MPES_RTGV_MTB_KEY_EXT_MAP TYPE MPES_RTGV_MTB_KEY_EXT_MAP,
      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_MTB_KEY_EXT_MAP> TYPE MPES_RTGV_MTB_KEY_EXT_MAP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPES_RTGV_MTB_KEY_EXT_MAP
*  INTO TABLE @DATA(IT_MPES_RTGV_MTB_KEY_EXT_MAP2).
*--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_MTB_KEY_EXT_MAP INDEX 1 INTO DATA(WA_MPES_RTGV_MTB_KEY_EXT_MAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPES_RTGV_MTB_KEY_EXT_MAP>-SOURCE = 1.
<MPES_RTGV_MTB_KEY_EXT_MAP>-PLNTY = 1.
<MPES_RTGV_MTB_KEY_EXT_MAP>-PLNNR = 1.
<MPES_RTGV_MTB_KEY_EXT_MAP>-PLNAL = 1.
<MPES_RTGV_MTB_KEY_EXT_MAP>-VERSN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPES_RTGV_MTB_KEY_EXT_MAP-ZUONR, sy-vline,
  WA_MPES_RTGV_MTB_KEY_EXT_MAP-STLTY, sy-vline,
  WA_MPES_RTGV_MTB_KEY_EXT_MAP-STLNR, sy-vline,
  WA_MPES_RTGV_MTB_KEY_EXT_MAP-STLAL, sy-vline,
  WA_MPES_RTGV_MTB_KEY_EXT_MAP-BOM_VERSN, sy-vline,
  WA_MPES_RTGV_MTB_KEY_EXT_MAP-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPES_RTGV_MTB_KEY_EXT_MAP 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_MTB_KEY_EXT_MAP 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_MTB_KEY_EXT_MAP INTO WA_MPES_RTGV_MTB_KEY_EXT_MAP.


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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPES_RTGV_MTB_KEY_EXT_MAP-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_RTGV_MTB_KEY_EXT_MAP-AUFNR.
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_MTB_KEY_EXT_MAP_STR, 
SOURCE TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
VERSN TYPE STRING,
ZUONR TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
BOM_VERSN TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
STLAN TYPE STRING,
AUFNR TYPE STRING,
TARGET TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
VERSN TYPE STRING,
ZUONR TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
BOM_VERSN TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
STLAN TYPE STRING,
AUFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPES_RTGV_MTB_KEY_EXT_MAP_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_MTB_KEY_EXT_MAP_STR-SOURCE sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-PLNTY sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-PLNNR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-PLNAL sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-VERSN sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-ZUONR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLTY sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLNR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLAL sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-BOM_VERSN sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-MATNR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-WERKS sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLAN sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-AUFNR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-TARGET sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-PLNTY sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-PLNNR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-PLNAL sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-VERSN sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-ZUONR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLTY sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLNR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLAL sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-BOM_VERSN sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-MATNR sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-WERKS sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-STLAN sy-vline 
WA_MPES_RTGV_MTB_KEY_EXT_MAP_STR-AUFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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