ABAP Select data from SAP table ISU_EDSC_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU_EDSC_S
*  INTO TABLE @DATA(IT_ISU_EDSC_S2).
*--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_ISU_EDSC_S INDEX 1 INTO DATA(WA_ISU_EDSC_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU_EDSC_S>-SAISON = 1.
<ISU_EDSC_S>-DATE_FROM = 1.
<ISU_EDSC_S>-DATE_TO = 1.
<ISU_EDSC_S>-MANDT = 1.
<ISU_EDSC_S>-RABZUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU_EDSC_S-SPARTE, sy-vline,
  WA_ISU_EDSC_S-RABTYP, sy-vline,
  WA_ISU_EDSC_S-BZGBASIS, sy-vline,
  WA_ISU_EDSC_S-USE_REGIST, sy-vline,
  WA_ISU_EDSC_S-RABART, sy-vline,
  WA_ISU_EDSC_S-MASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU_EDSC_S 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_ISU_EDSC_S 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_ISU_EDSC_S INTO WA_ISU_EDSC_S.


*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 RABZUS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU_EDSC_S-RABZUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU_EDSC_S-RABZUS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MASS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISU_EDSC_S-MASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU_EDSC_S-MASS.
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_ISU_EDSC_S_STR, 
SAISON TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
MANDT TYPE STRING,
RABZUS TYPE STRING,
SPARTE TYPE STRING,
RABTYP TYPE STRING,
BZGBASIS TYPE STRING,
USE_REGIST TYPE STRING,
RABART TYPE STRING,
MASS TYPE STRING,
TIMBASIS TYPE STRING,
TIMTYP TYPE STRING,
AKLASSE TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
DISCOUNT_HISTORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU_EDSC_S_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_ISU_EDSC_S_STR-SAISON sy-vline 
WA_ISU_EDSC_S_STR-DATE_FROM sy-vline 
WA_ISU_EDSC_S_STR-DATE_TO sy-vline 
WA_ISU_EDSC_S_STR-MANDT sy-vline 
WA_ISU_EDSC_S_STR-RABZUS sy-vline 
WA_ISU_EDSC_S_STR-SPARTE sy-vline 
WA_ISU_EDSC_S_STR-RABTYP sy-vline 
WA_ISU_EDSC_S_STR-BZGBASIS sy-vline 
WA_ISU_EDSC_S_STR-USE_REGIST sy-vline 
WA_ISU_EDSC_S_STR-RABART sy-vline 
WA_ISU_EDSC_S_STR-MASS sy-vline 
WA_ISU_EDSC_S_STR-TIMBASIS sy-vline 
WA_ISU_EDSC_S_STR-TIMTYP sy-vline 
WA_ISU_EDSC_S_STR-AKLASSE sy-vline 
WA_ISU_EDSC_S_STR-ERDAT sy-vline 
WA_ISU_EDSC_S_STR-ERNAM sy-vline 
WA_ISU_EDSC_S_STR-AEDAT sy-vline 
WA_ISU_EDSC_S_STR-AENAM sy-vline 
WA_ISU_EDSC_S_STR-BEGRU sy-vline 
WA_ISU_EDSC_S_STR-LOEVM sy-vline 
WA_ISU_EDSC_S_STR-DISCOUNT_HISTORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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