ABAP Select data from SAP table E1HR_NL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1HR_NL 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_NL. 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_NL 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_NL TYPE STANDARD TABLE OF E1HR_NL,
      WA_E1HR_NL TYPE E1HR_NL,
      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_NL> TYPE E1HR_NL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1HR_NL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1HR_NL
  INTO TABLE IT_E1HR_NL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1HR_NL
*  INTO TABLE @DATA(IT_E1HR_NL2).
*--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_NL INDEX 1 INTO DATA(WA_E1HR_NL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1HR_NL ASSIGNING <E1HR_NL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1HR_NL>-BEGDA = 1.
<E1HR_NL>-ENDDA = 1.
<E1HR_NL>-CCOBT = 1.
<E1HR_NL>-CFIZZ = 1.
<E1HR_NL>-IREAP = 1.

ENDLOOP.

LOOP AT IT_E1HR_NL INTO WA_E1HR_NL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1HR_NL-CIINV, sy-vline,
  WA_E1HR_NL-IAOUK, sy-vline,
  WA_E1HR_NL-CAARD, sy-vline,
  WA_E1HR_NL-CAOCL, sy-vline,
  WA_E1HR_NL-AANVU, sy-vline,
  WA_E1HR_NL-VERWE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1HR_NL 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_NL 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_NL INTO WA_E1HR_NL.


*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_NL_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CCOBT TYPE STRING,
CFIZZ TYPE STRING,
IREAP TYPE STRING,
CIINV TYPE STRING,
IAOUK TYPE STRING,
CAARD TYPE STRING,
CAOCL TYPE STRING,
AANVU TYPE STRING,
VERWE TYPE STRING,
VANGN TYPE STRING,
CFIFZ TYPE STRING,
CIVPL TYPE STRING,
NUMIV TYPE STRING,
NRPOL TYPE STRING,
CR55P TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1HR_NL_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_NL_STR-BEGDA sy-vline 
WA_E1HR_NL_STR-ENDDA sy-vline 
WA_E1HR_NL_STR-CCOBT sy-vline 
WA_E1HR_NL_STR-CFIZZ sy-vline 
WA_E1HR_NL_STR-IREAP sy-vline 
WA_E1HR_NL_STR-CIINV sy-vline 
WA_E1HR_NL_STR-IAOUK sy-vline 
WA_E1HR_NL_STR-CAARD sy-vline 
WA_E1HR_NL_STR-CAOCL sy-vline 
WA_E1HR_NL_STR-AANVU sy-vline 
WA_E1HR_NL_STR-VERWE sy-vline 
WA_E1HR_NL_STR-VANGN sy-vline 
WA_E1HR_NL_STR-CFIFZ sy-vline 
WA_E1HR_NL_STR-CIVPL sy-vline 
WA_E1HR_NL_STR-NUMIV sy-vline 
WA_E1HR_NL_STR-NRPOL sy-vline 
WA_E1HR_NL_STR-CR55P sy-vline      INTO ld_text SEPARATED BY SPACE.

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