ABAP Select data from SAP table MSAM10_MR_RESULT_HEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MSAM10_MR_RESULT_HEADER 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 MSAM10_MR_RESULT_HEADER. 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 MSAM10_MR_RESULT_HEADER 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_MSAM10_MR_RESULT_HEADER TYPE STANDARD TABLE OF MSAM10_MR_RESULT_HEADER,
      WA_MSAM10_MR_RESULT_HEADER TYPE MSAM10_MR_RESULT_HEADER,
      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: <MSAM10_MR_RESULT_HEADER> TYPE MSAM10_MR_RESULT_HEADER.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MSAM10_MR_RESULT_HEADER.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MSAM10_MR_RESULT_HEADER
  INTO TABLE IT_MSAM10_MR_RESULT_HEADER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSAM10_MR_RESULT_HEADER
*  INTO TABLE @DATA(IT_MSAM10_MR_RESULT_HEADER2).
*--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_MSAM10_MR_RESULT_HEADER INDEX 1 INTO DATA(WA_MSAM10_MR_RESULT_HEADER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MSAM10_MR_RESULT_HEADER ASSIGNING <MSAM10_MR_RESULT_HEADER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSAM10_MR_RESULT_HEADER>-MATERIAL = 1.
<MSAM10_MR_RESULT_HEADER>-SERIALNO = 1.
<MSAM10_MR_RESULT_HEADER>-REGISTER = 1.
<MSAM10_MR_RESULT_HEADER>-MRREASON = 1.
<MSAM10_MR_RESULT_HEADER>-MRIDNUMBER = 1.

ENDLOOP.

LOOP AT IT_MSAM10_MR_RESULT_HEADER INTO WA_MSAM10_MR_RESULT_HEADER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSAM10_MR_RESULT_HEADER-READINGRESULT, sy-vline,
  WA_MSAM10_MR_RESULT_HEADER-ACTUALCUSTOMERMRTYPE, sy-vline,
  WA_MSAM10_MR_RESULT_HEADER-METERREADER, sy-vline,
  WA_MSAM10_MR_RESULT_HEADER-MRDATEFORBILLING, sy-vline,
  WA_MSAM10_MR_RESULT_HEADER-MRTIMEFORBILLING, sy-vline,
  WA_MSAM10_MR_RESULT_HEADER-ACTUALMRDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSAM10_MR_RESULT_HEADER 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_MSAM10_MR_RESULT_HEADER 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_MSAM10_MR_RESULT_HEADER INTO WA_MSAM10_MR_RESULT_HEADER.


*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 MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MSAM10_MR_RESULT_HEADER-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSAM10_MR_RESULT_HEADER-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field SERIALNO
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_MSAM10_MR_RESULT_HEADER-SERIALNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSAM10_MR_RESULT_HEADER-SERIALNO.
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_MSAM10_MR_RESULT_HEADER_STR, 
MATERIAL TYPE STRING,
SERIALNO TYPE STRING,
REGISTER TYPE STRING,
MRREASON TYPE STRING,
MRIDNUMBER TYPE STRING,
READINGRESULT TYPE STRING,
ACTUALCUSTOMERMRTYPE TYPE STRING,
METERREADER TYPE STRING,
MRDATEFORBILLING TYPE STRING,
MRTIMEFORBILLING TYPE STRING,
ACTUALMRDATE TYPE STRING,
ACTUALMRTIME TYPE STRING,
MRDATEOFMAXIMUM TYPE STRING,
MRTIMEOFMAXIMUM TYPE STRING,
SMORDER TYPE STRING,
ACTIVE TYPE STRING,
METERREADINGNOTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSAM10_MR_RESULT_HEADER_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_MSAM10_MR_RESULT_HEADER_STR-MATERIAL sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-SERIALNO sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-REGISTER sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-MRREASON sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-MRIDNUMBER sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-READINGRESULT sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-ACTUALCUSTOMERMRTYPE sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-METERREADER sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-MRDATEFORBILLING sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-MRTIMEFORBILLING sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-ACTUALMRDATE sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-ACTUALMRTIME sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-MRDATEOFMAXIMUM sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-MRTIMEOFMAXIMUM sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-SMORDER sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-ACTIVE sy-vline 
WA_MSAM10_MR_RESULT_HEADER_STR-METERREADINGNOTE sy-vline      INTO ld_text SEPARATED BY SPACE.

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