ABAP Select data from SAP table E1HR_GN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1HR_GN 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 E1HR_GN. 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 E1HR_GN 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_E1HR_GN TYPE STANDARD TABLE OF E1HR_GN,
      WA_E1HR_GN TYPE E1HR_GN,
      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: <E1HR_GN> TYPE E1HR_GN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1HR_GN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1HR_GN
  INTO TABLE IT_E1HR_GN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1HR_GN
*  INTO TABLE @DATA(IT_E1HR_GN2).
*--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_E1HR_GN INDEX 1 INTO DATA(WA_E1HR_GN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1HR_GN ASSIGNING <E1HR_GN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1HR_GN>-EXMPT = 1.
<E1HR_GN>-RACKY = 1.
<E1HR_GN>-MILSA = 1.
<E1HR_GN>-DISAB = 1.
<E1HR_GN>-VETST = 1.

ENDLOOP.

LOOP AT IT_E1HR_GN INTO WA_E1HR_GN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1HR_GN-EEOCT, sy-vline,
  WA_E1HR_GN-EEOTX, sy-vline,
  WA_E1HR_GN-AAPCT, sy-vline,
  WA_E1HR_GN-LTEXT, sy-vline,
  WA_E1HR_GN-REPUN, sy-vline,
  WA_E1HR_GN-EEOHQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1HR_GN 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_E1HR_GN 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_E1HR_GN INTO WA_E1HR_GN.


*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_E1HR_GN_STR, 
EXMPT TYPE STRING,
RACKY TYPE STRING,
MILSA TYPE STRING,
DISAB TYPE STRING,
VETST TYPE STRING,
EEOCT TYPE STRING,
EEOTX TYPE STRING,
AAPCT TYPE STRING,
LTEXT TYPE STRING,
REPUN TYPE STRING,
EEOHQ TYPE STRING,
WCCODE TYPE STRING,
WCTEXT TYPE STRING,
WCSOCODE TYPE STRING,
SOCTEXT TYPE STRING,
WCNOCODE TYPE STRING,
NOCTEXT TYPE STRING,
OFFIC TYPE STRING,
SEASN TYPE STRING,
HICMP TYPE STRING,
WCSTATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1HR_GN_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_E1HR_GN_STR-EXMPT sy-vline 
WA_E1HR_GN_STR-RACKY sy-vline 
WA_E1HR_GN_STR-MILSA sy-vline 
WA_E1HR_GN_STR-DISAB sy-vline 
WA_E1HR_GN_STR-VETST sy-vline 
WA_E1HR_GN_STR-EEOCT sy-vline 
WA_E1HR_GN_STR-EEOTX sy-vline 
WA_E1HR_GN_STR-AAPCT sy-vline 
WA_E1HR_GN_STR-LTEXT sy-vline 
WA_E1HR_GN_STR-REPUN sy-vline 
WA_E1HR_GN_STR-EEOHQ sy-vline 
WA_E1HR_GN_STR-WCCODE sy-vline 
WA_E1HR_GN_STR-WCTEXT sy-vline 
WA_E1HR_GN_STR-WCSOCODE sy-vline 
WA_E1HR_GN_STR-SOCTEXT sy-vline 
WA_E1HR_GN_STR-WCNOCODE sy-vline 
WA_E1HR_GN_STR-NOCTEXT sy-vline 
WA_E1HR_GN_STR-OFFIC sy-vline 
WA_E1HR_GN_STR-SEASN sy-vline 
WA_E1HR_GN_STR-HICMP sy-vline 
WA_E1HR_GN_STR-WCSTATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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