ABAP Select data from SAP table EWAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWAD
*  INTO TABLE @DATA(IT_EWAD2).
*--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_EWAD INDEX 1 INTO DATA(WA_EWAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWAD>-SPRAS = 1.
<EWAD>-EWAID = 1.
<EWAD>-ACTGRP = 1.
<EWAD>-OKCODE = 1.
<EWAD>-PARAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWAD-KEYFIELD, sy-vline,
  WA_EWAD-REPID, sy-vline,
  WA_EWAD-LISTID, sy-vline,
  WA_EWAD-STATUS, sy-vline,
  WA_EWAD-CUSTDEF, sy-vline,
  WA_EWAD-MARKABLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWAD 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_EWAD 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_EWAD INTO WA_EWAD.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EWAD-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWAD-SPRAS.
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_EWAD_STR, 
SPRAS TYPE STRING,
EWAID TYPE STRING,
ACTGRP TYPE STRING,
OKCODE TYPE STRING,
PARAM TYPE STRING,
KEYFIELD TYPE STRING,
REPID TYPE STRING,
LISTID TYPE STRING,
STATUS TYPE STRING,
CUSTDEF TYPE STRING,
MARKABLE TYPE STRING,
ACTGRPTEXT TYPE STRING,
DISABLED TYPE STRING,
ACTTYPE TYPE STRING,
CALLMODE TYPE STRING,
LOOPACTGR TYPE STRING,
OBJTYPE TYPE STRING,
METHOD TYPE STRING,
TASK TYPE STRING,
FORMREPID TYPE STRING,
FORMNAME TYPE STRING,
ACTIONTEXT TYPE STRING,
MENUTEXT TYPE STRING,
REFOBJTYPE TYPE STRING,
REFSTRUCT TYPE STRING,
REFFIELD TYPE STRING,
TABELEM TYPE STRING,
OBLIG TYPE STRING,
ACTGRPMARK TYPE STRING,
FIELD TYPE STRING,
LITERAL TYPE STRING,
OLD_EWAID TYPE STRING,
OLD_CUSTDE TYPE STRING,
OLD_REPID TYPE STRING,
OLD_LISTID TYPE STRING,
OLD_STATUS TYPE STRING,
NEW_ACTGRP TYPE STRING,
NEW_OKCODE TYPE STRING,
NEW_PARAM TYPE STRING,
NEW_KEYFLD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWAD_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_EWAD_STR-SPRAS sy-vline 
WA_EWAD_STR-EWAID sy-vline 
WA_EWAD_STR-ACTGRP sy-vline 
WA_EWAD_STR-OKCODE sy-vline 
WA_EWAD_STR-PARAM sy-vline 
WA_EWAD_STR-KEYFIELD sy-vline 
WA_EWAD_STR-REPID sy-vline 
WA_EWAD_STR-LISTID sy-vline 
WA_EWAD_STR-STATUS sy-vline 
WA_EWAD_STR-CUSTDEF sy-vline 
WA_EWAD_STR-MARKABLE sy-vline 
WA_EWAD_STR-ACTGRPTEXT sy-vline 
WA_EWAD_STR-DISABLED sy-vline 
WA_EWAD_STR-ACTTYPE sy-vline 
WA_EWAD_STR-CALLMODE sy-vline 
WA_EWAD_STR-LOOPACTGR sy-vline 
WA_EWAD_STR-OBJTYPE sy-vline 
WA_EWAD_STR-METHOD sy-vline 
WA_EWAD_STR-TASK sy-vline 
WA_EWAD_STR-FORMREPID sy-vline 
WA_EWAD_STR-FORMNAME sy-vline 
WA_EWAD_STR-ACTIONTEXT sy-vline 
WA_EWAD_STR-MENUTEXT sy-vline 
WA_EWAD_STR-REFOBJTYPE sy-vline 
WA_EWAD_STR-REFSTRUCT sy-vline 
WA_EWAD_STR-REFFIELD sy-vline 
WA_EWAD_STR-TABELEM sy-vline 
WA_EWAD_STR-OBLIG sy-vline 
WA_EWAD_STR-ACTGRPMARK sy-vline 
WA_EWAD_STR-FIELD sy-vline 
WA_EWAD_STR-LITERAL sy-vline 
WA_EWAD_STR-OLD_EWAID sy-vline 
WA_EWAD_STR-OLD_CUSTDE sy-vline 
WA_EWAD_STR-OLD_REPID sy-vline 
WA_EWAD_STR-OLD_LISTID sy-vline 
WA_EWAD_STR-OLD_STATUS sy-vline 
WA_EWAD_STR-NEW_ACTGRP sy-vline 
WA_EWAD_STR-NEW_OKCODE sy-vline 
WA_EWAD_STR-NEW_PARAM sy-vline 
WA_EWAD_STR-NEW_KEYFLD sy-vline      INTO ld_text SEPARATED BY SPACE.

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