ABAP Select data from SAP table MPES_RTGV_OP_COM_INS_COMP 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_OP_COM_INS_COMP 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_OP_COM_INS_COMP. 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_OP_COM_INS_COMP 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_OP_COM_INS_COMP TYPE STANDARD TABLE OF MPES_RTGV_OP_COM_INS_COMP,
      WA_MPES_RTGV_OP_COM_INS_COMP TYPE MPES_RTGV_OP_COM_INS_COMP,
      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_OP_COM_INS_COMP> TYPE MPES_RTGV_OP_COM_INS_COMP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPES_RTGV_OP_COM_INS_COMP
*  INTO TABLE @DATA(IT_MPES_RTGV_OP_COM_INS_COMP2).
*--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_OP_COM_INS_COMP INDEX 1 INTO DATA(WA_MPES_RTGV_OP_COM_INS_COMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPES_RTGV_OP_COM_INS_COMP>-STLNR = 1.
<MPES_RTGV_OP_COM_INS_COMP>-STLAL = 1.
<MPES_RTGV_OP_COM_INS_COMP>-IDNRK = 1.
<MPES_RTGV_OP_COM_INS_COMP>-POSNR = 1.
<MPES_RTGV_OP_COM_INS_COMP>-STVKN_VERSN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPES_RTGV_OP_COM_INS_COMP-INST_GUID, sy-vline,
  WA_MPES_RTGV_OP_COM_INS_COMP-POSTP, sy-vline,
  WA_MPES_RTGV_OP_COM_INS_COMP-BOMAT, sy-vline,
  WA_MPES_RTGV_OP_COM_INS_COMP-QUANTITY, sy-vline,
  WA_MPES_RTGV_OP_COM_INS_COMP-BASE_UOM, sy-vline,
  WA_MPES_RTGV_OP_COM_INS_COMP-SEQUENCE_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPES_RTGV_OP_COM_INS_COMP 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_OP_COM_INS_COMP 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_OP_COM_INS_COMP INTO WA_MPES_RTGV_OP_COM_INS_COMP.


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

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

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

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

*Conversion exit CUNIT, internal->external for field IMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MPES_RTGV_OP_COM_INS_COMP-IMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPES_RTGV_OP_COM_INS_COMP-IMEIN.
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_OP_COM_INS_COMP_STR, 
STLNR TYPE STRING,
STLAL TYPE STRING,
IDNRK TYPE STRING,
POSNR TYPE STRING,
STVKN_VERSN TYPE STRING,
INST_GUID TYPE STRING,
POSTP TYPE STRING,
BOMAT TYPE STRING,
QUANTITY TYPE STRING,
BASE_UOM TYPE STRING,
SEQUENCE_NO TYPE STRING,
RGEKZ TYPE STRING,
SERNP TYPE STRING,
XCHPF TYPE STRING,
SCHGT TYPE STRING,
KZKUP TYPE STRING,
FMENG TYPE STRING,
SORTF TYPE STRING,
POTX1 TYPE STRING,
POTX2 TYPE STRING,
IMENG TYPE STRING,
IMEIN TYPE STRING,
REF_DESIGNATOR TYPE STRING,
MAKTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPES_RTGV_OP_COM_INS_COMP_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_OP_COM_INS_COMP_STR-STLNR sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-STLAL sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-IDNRK sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-POSNR sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-STVKN_VERSN sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-INST_GUID sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-POSTP sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-BOMAT sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-QUANTITY sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-BASE_UOM sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-SEQUENCE_NO sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-RGEKZ sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-SERNP sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-XCHPF sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-SCHGT sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-KZKUP sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-FMENG sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-SORTF sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-POTX1 sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-POTX2 sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-IMENG sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-IMEIN sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-REF_DESIGNATOR sy-vline 
WA_MPES_RTGV_OP_COM_INS_COMP_STR-MAKTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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