ABAP Select data from SAP table EHSWAT_USER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAT_USER
*  INTO TABLE @DATA(IT_EHSWAT_USER2).
*--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_EHSWAT_USER INDEX 1 INTO DATA(WA_EHSWAT_USER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAT_USER>-MANDT = 1.
<EHSWAT_USER>-APPLICATION = 1.
<EHSWAT_USER>-UNAME = 1.
<EHSWAT_USER>-FLAG1 = 1.
<EHSWAT_USER>-FLAG2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAT_USER-FLAG3, sy-vline,
  WA_EHSWAT_USER-FLAG4, sy-vline,
  WA_EHSWAT_USER-FLAG5, sy-vline,
  WA_EHSWAT_USER-FLAG6, sy-vline,
  WA_EHSWAT_USER-FLAG7, sy-vline,
  WA_EHSWAT_USER-FLAG8, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAT_USER 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_EHSWAT_USER 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_EHSWAT_USER INTO WA_EHSWAT_USER.


*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_EHSWAT_USER_STR, 
MANDT TYPE STRING,
APPLICATION TYPE STRING,
UNAME TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
FLAG5 TYPE STRING,
FLAG6 TYPE STRING,
FLAG7 TYPE STRING,
FLAG8 TYPE STRING,
FLAG9 TYPE STRING,
FLAG10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAT_USER_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_EHSWAT_USER_STR-MANDT sy-vline 
WA_EHSWAT_USER_STR-APPLICATION sy-vline 
WA_EHSWAT_USER_STR-UNAME sy-vline 
WA_EHSWAT_USER_STR-FLAG1 sy-vline 
WA_EHSWAT_USER_STR-FLAG2 sy-vline 
WA_EHSWAT_USER_STR-FLAG3 sy-vline 
WA_EHSWAT_USER_STR-FLAG4 sy-vline 
WA_EHSWAT_USER_STR-FLAG5 sy-vline 
WA_EHSWAT_USER_STR-FLAG6 sy-vline 
WA_EHSWAT_USER_STR-FLAG7 sy-vline 
WA_EHSWAT_USER_STR-FLAG8 sy-vline 
WA_EHSWAT_USER_STR-FLAG9 sy-vline 
WA_EHSWAT_USER_STR-FLAG10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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