ABAP Select data from SAP table EHSWAT001_DESCR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EHSWAT001_DESCR 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 EHSWAT001_DESCR. 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 EHSWAT001_DESCR 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_EHSWAT001_DESCR TYPE STANDARD TABLE OF EHSWAT001_DESCR,
      WA_EHSWAT001_DESCR TYPE EHSWAT001_DESCR,
      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: <EHSWAT001_DESCR> TYPE EHSWAT001_DESCR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_EHSWAT001_DESCR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM EHSWAT001_DESCR
  INTO TABLE IT_EHSWAT001_DESCR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAT001_DESCR
*  INTO TABLE @DATA(IT_EHSWAT001_DESCR2).
*--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_EHSWAT001_DESCR INDEX 1 INTO DATA(WA_EHSWAT001_DESCR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_EHSWAT001_DESCR ASSIGNING <EHSWAT001_DESCR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAT001_DESCR>-MANDT = 1.
<EHSWAT001_DESCR>-RECN = 1.
<EHSWAT001_DESCR>-ACTN = 1.
<EHSWAT001_DESCR>-LANGU = 1.
<EHSWAT001_DESCR>-VALFR = 1.

ENDLOOP.

LOOP AT IT_EHSWAT001_DESCR INTO WA_EHSWAT001_DESCR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAT001_DESCR-VALTO, sy-vline,
  WA_EHSWAT001_DESCR-AENNR, sy-vline,
  WA_EHSWAT001_DESCR-DELFLG, sy-vline,
  WA_EHSWAT001_DESCR-PARKFLG, sy-vline,
  WA_EHSWAT001_DESCR-CRDAT, sy-vline,
  WA_EHSWAT001_DESCR-CRNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAT001_DESCR 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_EHSWAT001_DESCR 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_EHSWAT001_DESCR INTO WA_EHSWAT001_DESCR.


*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 LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAT001_DESCR-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAT001_DESCR-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAT001_DESCR-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAT001_DESCR-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OWNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAT001_DESCR-OWNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAT001_DESCR-OWNID.
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_EHSWAT001_DESCR_STR, 
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
LANGU TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
WADESCRPOFG TYPE STRING,
WADEPRO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAT001_DESCR_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_EHSWAT001_DESCR_STR-MANDT sy-vline 
WA_EHSWAT001_DESCR_STR-RECN sy-vline 
WA_EHSWAT001_DESCR_STR-ACTN sy-vline 
WA_EHSWAT001_DESCR_STR-LANGU sy-vline 
WA_EHSWAT001_DESCR_STR-VALFR sy-vline 
WA_EHSWAT001_DESCR_STR-VALTO sy-vline 
WA_EHSWAT001_DESCR_STR-AENNR sy-vline 
WA_EHSWAT001_DESCR_STR-DELFLG sy-vline 
WA_EHSWAT001_DESCR_STR-PARKFLG sy-vline 
WA_EHSWAT001_DESCR_STR-CRDAT sy-vline 
WA_EHSWAT001_DESCR_STR-CRNAM sy-vline 
WA_EHSWAT001_DESCR_STR-UPDDAT sy-vline 
WA_EHSWAT001_DESCR_STR-UPDNAM sy-vline 
WA_EHSWAT001_DESCR_STR-SRSID sy-vline 
WA_EHSWAT001_DESCR_STR-OWNID sy-vline 
WA_EHSWAT001_DESCR_STR-RECNROOT sy-vline 
WA_EHSWAT001_DESCR_STR-WADESCRPOFG sy-vline 
WA_EHSWAT001_DESCR_STR-WADEPRO sy-vline      INTO ld_text SEPARATED BY SPACE.

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