ABAP Select data from SAP table MSRD_MD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSRD_MD
*  INTO TABLE @DATA(IT_MSRD_MD2).
*--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_MSRD_MD INDEX 1 INTO DATA(WA_MSRD_MD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSRD_MD>-MANDT = 1.
<MSRD_MD>-MATNR = 1.
<MSRD_MD>-WERKS = 1.
<MSRD_MD>-CHARG = 1.
<MSRD_MD>-SOBKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSRD_MD-LIFNR, sy-vline,
  WA_MSRD_MD-PSPNR, sy-vline,
  WA_MSRD_MD-LFGJA, sy-vline,
  WA_MSRD_MD-LFMON, sy-vline,
  WA_MSRD_MD-RDSPR, sy-vline,
  WA_MSRD_MD-RDILL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSRD_MD 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_MSRD_MD 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_MSRD_MD INTO WA_MSRD_MD.


*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_MSRD_MD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSRD_MD-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MSRD_MD-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSRD_MD-LFGJA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RDJIN
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MSRD_MD-RDJIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSRD_MD-RDJIN.
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_MSRD_MD_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
PSPNR TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
RDSPR TYPE STRING,
RDILL TYPE STRING,
RDILQ TYPE STRING,
RDVLL TYPE STRING,
RDVLQ TYPE STRING,
RDFLL TYPE STRING,
RDFLQ TYPE STRING,
RDDLL TYPE STRING,
ERSDA TYPE STRING,
RDJIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSRD_MD_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_MSRD_MD_STR-MANDT sy-vline 
WA_MSRD_MD_STR-MATNR sy-vline 
WA_MSRD_MD_STR-WERKS sy-vline 
WA_MSRD_MD_STR-CHARG sy-vline 
WA_MSRD_MD_STR-SOBKZ sy-vline 
WA_MSRD_MD_STR-LIFNR sy-vline 
WA_MSRD_MD_STR-PSPNR sy-vline 
WA_MSRD_MD_STR-LFGJA sy-vline 
WA_MSRD_MD_STR-LFMON sy-vline 
WA_MSRD_MD_STR-RDSPR sy-vline 
WA_MSRD_MD_STR-RDILL sy-vline 
WA_MSRD_MD_STR-RDILQ sy-vline 
WA_MSRD_MD_STR-RDVLL sy-vline 
WA_MSRD_MD_STR-RDVLQ sy-vline 
WA_MSRD_MD_STR-RDFLL sy-vline 
WA_MSRD_MD_STR-RDFLQ sy-vline 
WA_MSRD_MD_STR-RDDLL sy-vline 
WA_MSRD_MD_STR-ERSDA sy-vline 
WA_MSRD_MD_STR-RDJIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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