ABAP Select data from SAP table MDR1ROUNDPARAMS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDR1ROUNDPARAMS 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 MDR1ROUNDPARAMS. 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 MDR1ROUNDPARAMS 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_MDR1ROUNDPARAMS TYPE STANDARD TABLE OF MDR1ROUNDPARAMS,
      WA_MDR1ROUNDPARAMS TYPE MDR1ROUNDPARAMS,
      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: <MDR1ROUNDPARAMS> TYPE MDR1ROUNDPARAMS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MDR1ROUNDPARAMS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MDR1ROUNDPARAMS
  INTO TABLE IT_MDR1ROUNDPARAMS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDR1ROUNDPARAMS
*  INTO TABLE @DATA(IT_MDR1ROUNDPARAMS2).
*--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_MDR1ROUNDPARAMS INDEX 1 INTO DATA(WA_MDR1ROUNDPARAMS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MDR1ROUNDPARAMS ASSIGNING <MDR1ROUNDPARAMS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDR1ROUNDPARAMS>-DEFQTUNIT = 1.
<MDR1ROUNDPARAMS>-DEFUMREZ = 1.
<MDR1ROUNDPARAMS>-DEFUMREN = 1.
<MDR1ROUNDPARAMS>-VENUNITGR = 1.
<MDR1ROUNDPARAMS>-BUYUNITGR = 1.

ENDLOOP.

LOOP AT IT_MDR1ROUNDPARAMS INTO WA_MDR1ROUNDPARAMS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDR1ROUNDPARAMS-RDPRF, sy-vline,
  WA_MDR1ROUNDPARAMS-RDPR, sy-vline,
  WA_MDR1ROUNDPARAMS-MANDT, sy-vline,
  WA_MDR1ROUNDPARAMS-WERKS, sy-vline,
  WA_MDR1ROUNDPARAMS-RDPRF, sy-vline,
  WA_MDR1ROUNDPARAMS-RDZAE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDR1ROUNDPARAMS 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_MDR1ROUNDPARAMS 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_MDR1ROUNDPARAMS INTO WA_MDR1ROUNDPARAMS.


*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 CUNIT, internal->external for field DEFQTUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDR1ROUNDPARAMS-DEFQTUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDR1ROUNDPARAMS-DEFQTUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAMIQTUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDR1ROUNDPARAMS-MAMIQTUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDR1ROUNDPARAMS-MAMIQTUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field SCHME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDR1ROUNDPARAMS-SCHME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDR1ROUNDPARAMS-SCHME.
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_MDR1ROUNDPARAMS_STR, 
DEFQTUNIT TYPE STRING,
DEFUMREZ TYPE STRING,
DEFUMREN TYPE STRING,
VENUNITGR TYPE STRING,
BUYUNITGR TYPE STRING,
RDPRF TYPE STRING,
RDPR TYPE STRING,
MANDT TYPE STRING,
WERKS TYPE STRING,
RDPRF TYPE STRING,
RDZAE TYPE STRING,
BDMNG TYPE STRING,
VORMG TYPE STRING,
RDMPO TYPE STRING,
RDRGL TYPE STRING,
CHKMELI TYPE STRING,
CHKMEKU TYPE STRING,
MAXQT TYPE STRING,
MINQT TYPE STRING,
MAMIQTUNIT TYPE STRING,
MAMIUMREZ TYPE STRING,
MAMIUMREN TYPE STRING,
INTVEND TYPE STRING,
VABME TYPE STRING,
BSTRF TYPE STRING,
VAVME TYPE STRING,
SCMNG TYPE STRING,
SCHME TYPE STRING,
SCHMEUMREZ TYPE STRING,
SCHMEUMREN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDR1ROUNDPARAMS_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_MDR1ROUNDPARAMS_STR-DEFQTUNIT sy-vline 
WA_MDR1ROUNDPARAMS_STR-DEFUMREZ sy-vline 
WA_MDR1ROUNDPARAMS_STR-DEFUMREN sy-vline 
WA_MDR1ROUNDPARAMS_STR-VENUNITGR sy-vline 
WA_MDR1ROUNDPARAMS_STR-BUYUNITGR sy-vline 
WA_MDR1ROUNDPARAMS_STR-RDPRF sy-vline 
WA_MDR1ROUNDPARAMS_STR-RDPR sy-vline 
WA_MDR1ROUNDPARAMS_STR-MANDT sy-vline 
WA_MDR1ROUNDPARAMS_STR-WERKS sy-vline 
WA_MDR1ROUNDPARAMS_STR-RDPRF sy-vline 
WA_MDR1ROUNDPARAMS_STR-RDZAE sy-vline 
WA_MDR1ROUNDPARAMS_STR-BDMNG sy-vline 
WA_MDR1ROUNDPARAMS_STR-VORMG sy-vline 
WA_MDR1ROUNDPARAMS_STR-RDMPO sy-vline 
WA_MDR1ROUNDPARAMS_STR-RDRGL sy-vline 
WA_MDR1ROUNDPARAMS_STR-CHKMELI sy-vline 
WA_MDR1ROUNDPARAMS_STR-CHKMEKU sy-vline 
WA_MDR1ROUNDPARAMS_STR-MAXQT sy-vline 
WA_MDR1ROUNDPARAMS_STR-MINQT sy-vline 
WA_MDR1ROUNDPARAMS_STR-MAMIQTUNIT sy-vline 
WA_MDR1ROUNDPARAMS_STR-MAMIUMREZ sy-vline 
WA_MDR1ROUNDPARAMS_STR-MAMIUMREN sy-vline 
WA_MDR1ROUNDPARAMS_STR-INTVEND sy-vline 
WA_MDR1ROUNDPARAMS_STR-VABME sy-vline 
WA_MDR1ROUNDPARAMS_STR-BSTRF sy-vline 
WA_MDR1ROUNDPARAMS_STR-VAVME sy-vline 
WA_MDR1ROUNDPARAMS_STR-SCMNG sy-vline 
WA_MDR1ROUNDPARAMS_STR-SCHME sy-vline 
WA_MDR1ROUNDPARAMS_STR-SCHMEUMREZ sy-vline 
WA_MDR1ROUNDPARAMS_STR-SCHMEUMREN sy-vline      INTO ld_text SEPARATED BY SPACE.

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