ABAP Select data from SAP table EMG_DUNNING into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EMG_DUNNING
*  INTO TABLE @DATA(IT_EMG_DUNNING2).
*--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_EMG_DUNNING INDEX 1 INTO DATA(WA_EMG_DUNNING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EMG_DUNNING>-GPART = 1.
<EMG_DUNNING>-BONMA = 1.
<EMG_DUNNING>-BONVH = 1.
<EMG_DUNNING>-BMADT = 1.
<EMG_DUNNING>-AUSDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EMG_DUNNING-FRDAT, sy-vline,
  WA_EMG_DUNNING-MGE1M, sy-vline,
  WA_EMG_DUNNING-MG1BL, sy-vline,
  WA_EMG_DUNNING-MGE2M, sy-vline,
  WA_EMG_DUNNING-MG2BL, sy-vline,
  WA_EMG_DUNNING-MGE3M, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EMG_DUNNING 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_EMG_DUNNING 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_EMG_DUNNING INTO WA_EMG_DUNNING.


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

*Conversion exit ALPHA, internal->external for field MG1BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_DUNNING-MG1BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_DUNNING-MG1BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MG2BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_DUNNING-MG2BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_DUNNING-MG2BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MG3BL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_DUNNING-MG3BL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_DUNNING-MG3BL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MIBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EMG_DUNNING-MIBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EMG_DUNNING-MIBEL.
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_EMG_DUNNING_STR, 
GPART TYPE STRING,
BONMA TYPE STRING,
BONVH TYPE STRING,
BMADT TYPE STRING,
AUSDT TYPE STRING,
FRDAT TYPE STRING,
MGE1M TYPE STRING,
MG1BL TYPE STRING,
MGE2M TYPE STRING,
MG2BL TYPE STRING,
MGE3M TYPE STRING,
MG3BL TYPE STRING,
MINTM TYPE STRING,
MIBEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EMG_DUNNING_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_EMG_DUNNING_STR-GPART sy-vline 
WA_EMG_DUNNING_STR-BONMA sy-vline 
WA_EMG_DUNNING_STR-BONVH sy-vline 
WA_EMG_DUNNING_STR-BMADT sy-vline 
WA_EMG_DUNNING_STR-AUSDT sy-vline 
WA_EMG_DUNNING_STR-FRDAT sy-vline 
WA_EMG_DUNNING_STR-MGE1M sy-vline 
WA_EMG_DUNNING_STR-MG1BL sy-vline 
WA_EMG_DUNNING_STR-MGE2M sy-vline 
WA_EMG_DUNNING_STR-MG2BL sy-vline 
WA_EMG_DUNNING_STR-MGE3M sy-vline 
WA_EMG_DUNNING_STR-MG3BL sy-vline 
WA_EMG_DUNNING_STR-MINTM sy-vline 
WA_EMG_DUNNING_STR-MIBEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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