ABAP Select data from SAP table MARD_DQ_STR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MARD_DQ_STR
*  INTO TABLE @DATA(IT_MARD_DQ_STR2).
*--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_MARD_DQ_STR INDEX 1 INTO DATA(WA_MARD_DQ_STR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MARD_DQ_STR>-SOURCE_SYSTEM = 1.
<MARD_DQ_STR>-SOURCE_ID = 1.
<MARD_DQ_STR>-WERKS = 1.
<MARD_DQ_STR>-LGORT = 1.
<MARD_DQ_STR>-PSTAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MARD_DQ_STR-LVORM, sy-vline,
  WA_MARD_DQ_STR-LFGJA, sy-vline,
  WA_MARD_DQ_STR-LFMON, sy-vline,
  WA_MARD_DQ_STR-SPERR, sy-vline,
  WA_MARD_DQ_STR-LABST, sy-vline,
  WA_MARD_DQ_STR-UMLME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MARD_DQ_STR 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_MARD_DQ_STR 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_MARD_DQ_STR INTO WA_MARD_DQ_STR.


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

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

*Conversion exit GJAHR, internal->external for field MDJIN
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MARD_DQ_STR-MDJIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MARD_DQ_STR-MDJIN.
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_MARD_DQ_STR_STR, 
SOURCE_SYSTEM TYPE STRING,
SOURCE_ID TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
PSTAT TYPE STRING,
LVORM TYPE STRING,
LFGJA TYPE STRING,
LFMON TYPE STRING,
SPERR TYPE STRING,
LABST TYPE STRING,
UMLME TYPE STRING,
INSME TYPE STRING,
EINME TYPE STRING,
SPEME TYPE STRING,
RETME TYPE STRING,
VMLAB TYPE STRING,
VMUML TYPE STRING,
VMINS TYPE STRING,
VMEIN TYPE STRING,
VMSPE TYPE STRING,
VMRET TYPE STRING,
KZILL TYPE STRING,
KZILQ TYPE STRING,
KZILE TYPE STRING,
KZILS TYPE STRING,
KZVLL TYPE STRING,
KZVLQ TYPE STRING,
KZVLE TYPE STRING,
KZVLS TYPE STRING,
DISKZ TYPE STRING,
LSOBS TYPE STRING,
LMINB TYPE STRING,
LBSTF TYPE STRING,
HERKL TYPE STRING,
EXPPG TYPE STRING,
EXVER TYPE STRING,
LGPBE TYPE STRING,
KLABS TYPE STRING,
KINSM TYPE STRING,
KEINM TYPE STRING,
KSPEM TYPE STRING,
DLINL TYPE STRING,
PRCTL TYPE STRING,
ERSDA TYPE STRING,
VKLAB TYPE STRING,
VKUML TYPE STRING,
LWMKB TYPE STRING,
BSKRF TYPE STRING,
MDRUE TYPE STRING,
MDJIN TYPE STRING,
DUMMY_STL_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MARD_DQ_STR_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_MARD_DQ_STR_STR-SOURCE_SYSTEM sy-vline 
WA_MARD_DQ_STR_STR-SOURCE_ID sy-vline 
WA_MARD_DQ_STR_STR-WERKS sy-vline 
WA_MARD_DQ_STR_STR-LGORT sy-vline 
WA_MARD_DQ_STR_STR-PSTAT sy-vline 
WA_MARD_DQ_STR_STR-LVORM sy-vline 
WA_MARD_DQ_STR_STR-LFGJA sy-vline 
WA_MARD_DQ_STR_STR-LFMON sy-vline 
WA_MARD_DQ_STR_STR-SPERR sy-vline 
WA_MARD_DQ_STR_STR-LABST sy-vline 
WA_MARD_DQ_STR_STR-UMLME sy-vline 
WA_MARD_DQ_STR_STR-INSME sy-vline 
WA_MARD_DQ_STR_STR-EINME sy-vline 
WA_MARD_DQ_STR_STR-SPEME sy-vline 
WA_MARD_DQ_STR_STR-RETME sy-vline 
WA_MARD_DQ_STR_STR-VMLAB sy-vline 
WA_MARD_DQ_STR_STR-VMUML sy-vline 
WA_MARD_DQ_STR_STR-VMINS sy-vline 
WA_MARD_DQ_STR_STR-VMEIN sy-vline 
WA_MARD_DQ_STR_STR-VMSPE sy-vline 
WA_MARD_DQ_STR_STR-VMRET sy-vline 
WA_MARD_DQ_STR_STR-KZILL sy-vline 
WA_MARD_DQ_STR_STR-KZILQ sy-vline 
WA_MARD_DQ_STR_STR-KZILE sy-vline 
WA_MARD_DQ_STR_STR-KZILS sy-vline 
WA_MARD_DQ_STR_STR-KZVLL sy-vline 
WA_MARD_DQ_STR_STR-KZVLQ sy-vline 
WA_MARD_DQ_STR_STR-KZVLE sy-vline 
WA_MARD_DQ_STR_STR-KZVLS sy-vline 
WA_MARD_DQ_STR_STR-DISKZ sy-vline 
WA_MARD_DQ_STR_STR-LSOBS sy-vline 
WA_MARD_DQ_STR_STR-LMINB sy-vline 
WA_MARD_DQ_STR_STR-LBSTF sy-vline 
WA_MARD_DQ_STR_STR-HERKL sy-vline 
WA_MARD_DQ_STR_STR-EXPPG sy-vline 
WA_MARD_DQ_STR_STR-EXVER sy-vline 
WA_MARD_DQ_STR_STR-LGPBE sy-vline 
WA_MARD_DQ_STR_STR-KLABS sy-vline 
WA_MARD_DQ_STR_STR-KINSM sy-vline 
WA_MARD_DQ_STR_STR-KEINM sy-vline 
WA_MARD_DQ_STR_STR-KSPEM sy-vline 
WA_MARD_DQ_STR_STR-DLINL sy-vline 
WA_MARD_DQ_STR_STR-PRCTL sy-vline 
WA_MARD_DQ_STR_STR-ERSDA sy-vline 
WA_MARD_DQ_STR_STR-VKLAB sy-vline 
WA_MARD_DQ_STR_STR-VKUML sy-vline 
WA_MARD_DQ_STR_STR-LWMKB sy-vline 
WA_MARD_DQ_STR_STR-BSKRF sy-vline 
WA_MARD_DQ_STR_STR-MDRUE sy-vline 
WA_MARD_DQ_STR_STR-MDJIN sy-vline 
WA_MARD_DQ_STR_STR-DUMMY_STL_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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