ABAP Select data from SAP table EVAL_IV_WORK_HD_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP EVAL_IV_WORK_HD_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 EVAL_IV_WORK_HD_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 EVAL_IV_WORK_HD_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_EVAL_IV_WORK_HD_S TYPE STANDARD TABLE OF EVAL_IV_WORK_HD_S,
      WA_EVAL_IV_WORK_HD_S TYPE EVAL_IV_WORK_HD_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: <EVAL_IV_WORK_HD_S> TYPE EVAL_IV_WORK_HD_S.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EVAL_IV_WORK_HD_S
*  INTO TABLE @DATA(IT_EVAL_IV_WORK_HD_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_EVAL_IV_WORK_HD_S INDEX 1 INTO DATA(WA_EVAL_IV_WORK_HD_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EVAL_IV_WORK_HD_S>-MANDT = 1.
<EVAL_IV_WORK_HD_S>-BELNR = 1.
<EVAL_IV_WORK_HD_S>-GJAHR = 1.
<EVAL_IV_WORK_HD_S>-ARKUEN = 1.
<EVAL_IV_WORK_HD_S>-MAKZN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EVAL_IV_WORK_HD_S-RMWWR, sy-vline,
  WA_EVAL_IV_WORK_HD_S-DIFFN, sy-vline,
  WA_EVAL_IV_WORK_HD_S-BUKRS, sy-vline,
  WA_EVAL_IV_WORK_HD_S-LIFNR, sy-vline,
  WA_EVAL_IV_WORK_HD_S-BLDAT, sy-vline,
  WA_EVAL_IV_WORK_HD_S-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EVAL_IV_WORK_HD_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_EVAL_IV_WORK_HD_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_EVAL_IV_WORK_HD_S INTO WA_EVAL_IV_WORK_HD_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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EVAL_IV_WORK_HD_S-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EVAL_IV_WORK_HD_S-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_EVAL_IV_WORK_HD_S-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EVAL_IV_WORK_HD_S-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field STJAH
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_EVAL_IV_WORK_HD_S-STJAH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EVAL_IV_WORK_HD_S-STJAH.
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_EVAL_IV_WORK_HD_S_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
ARKUEN TYPE STRING,
MAKZN TYPE STRING,
RMWWR TYPE STRING,
DIFFN TYPE STRING,
BUKRS TYPE STRING,
LIFNR TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
USNAM TYPE STRING,
XRECH TYPE STRING,
WAERS TYPE STRING,
STBLG TYPE STRING,
STJAH TYPE STRING,
NETWR_RE TYPE STRING,
NETWR_GU TYPE STRING,
NETWR_NE TYPE STRING,
EVAL_FROM_DB TYPE STRING,
KRIT TYPE STRING,
POSTYP TYPE STRING,
IS_RELEVANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EVAL_IV_WORK_HD_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_EVAL_IV_WORK_HD_S_STR-MANDT sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-BELNR sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-GJAHR sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-ARKUEN sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-MAKZN sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-RMWWR sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-DIFFN sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-BUKRS sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-LIFNR sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-BLDAT sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-BUDAT sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-CPUDT sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-CPUTM sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-USNAM sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-XRECH sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-WAERS sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-STBLG sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-STJAH sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-NETWR_RE sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-NETWR_GU sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-NETWR_NE sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-EVAL_FROM_DB sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-KRIT sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-POSTYP sy-vline 
WA_EVAL_IV_WORK_HD_S_STR-IS_RELEVANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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