ABAP Select data from SAP table ISW3_ADM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISW3_ADM 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 ISW3_ADM. 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 ISW3_ADM 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_ISW3_ADM TYPE STANDARD TABLE OF ISW3_ADM,
      WA_ISW3_ADM TYPE ISW3_ADM,
      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: <ISW3_ADM> TYPE ISW3_ADM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISW3_ADM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISW3_ADM
  INTO TABLE IT_ISW3_ADM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISW3_ADM
*  INTO TABLE @DATA(IT_ISW3_ADM2).
*--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_ISW3_ADM INDEX 1 INTO DATA(WA_ISW3_ADM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISW3_ADM ASSIGNING <ISW3_ADM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISW3_ADM>-SRV_FILE = 1.
<ISW3_ADM>-APPNAMEV = 1.
<ISW3_ADM>-APPTYPE = 1.
<ISW3_ADM>-IMPTYPE = 1.
<ISW3_ADM>-INITPAGE = 1.

ENDLOOP.

LOOP AT IT_ISW3_ADM INTO WA_ISW3_ADM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISW3_ADM-URLCOMPO1, sy-vline,
  WA_ISW3_ADM-URLCOMPO2, sy-vline,
  WA_ISW3_ADM-URLCOMPO3, sy-vline,
  WA_ISW3_ADM-URLCOMPO4, sy-vline,
  WA_ISW3_ADM-URLCOMPO5, sy-vline,
  WA_ISW3_ADM-URLCOMPO6, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISW3_ADM 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_ISW3_ADM 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_ISW3_ADM INTO WA_ISW3_ADM.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ISW3_ADM_STR, 
SRV_FILE TYPE STRING,
APPNAMEV TYPE STRING,
APPTYPE TYPE STRING,
IMPTYPE TYPE STRING,
INITPAGE TYPE STRING,
URLCOMPO1 TYPE STRING,
URLCOMPO2 TYPE STRING,
URLCOMPO3 TYPE STRING,
URLCOMPO4 TYPE STRING,
URLCOMPO5 TYPE STRING,
URLCOMPO6 TYPE STRING,
URLCOMPO7 TYPE STRING,
URLCOMPO8 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISW3_ADM_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_ISW3_ADM_STR-SRV_FILE sy-vline 
WA_ISW3_ADM_STR-APPNAMEV sy-vline 
WA_ISW3_ADM_STR-APPTYPE sy-vline 
WA_ISW3_ADM_STR-IMPTYPE sy-vline 
WA_ISW3_ADM_STR-INITPAGE sy-vline 
WA_ISW3_ADM_STR-URLCOMPO1 sy-vline 
WA_ISW3_ADM_STR-URLCOMPO2 sy-vline 
WA_ISW3_ADM_STR-URLCOMPO3 sy-vline 
WA_ISW3_ADM_STR-URLCOMPO4 sy-vline 
WA_ISW3_ADM_STR-URLCOMPO5 sy-vline 
WA_ISW3_ADM_STR-URLCOMPO6 sy-vline 
WA_ISW3_ADM_STR-URLCOMPO7 sy-vline 
WA_ISW3_ADM_STR-URLCOMPO8 sy-vline      INTO ld_text SEPARATED BY SPACE.

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