ABAP Select data from SAP table E1HR_U4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1HR_U4 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_U4. 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_U4 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_U4 TYPE STANDARD TABLE OF E1HR_U4,
      WA_E1HR_U4 TYPE E1HR_U4,
      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_U4> TYPE E1HR_U4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1HR_U4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1HR_U4
  INTO TABLE IT_E1HR_U4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1HR_U4
*  INTO TABLE @DATA(IT_E1HR_U42).
*--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_U4 INDEX 1 INTO DATA(WA_E1HR_U42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1HR_U4 ASSIGNING <E1HR_U4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1HR_U4>-BEGDA = 1.
<E1HR_U4>-ENDDA = 1.
<E1HR_U4>-TAURT = 1.
<E1HR_U4>-TXSTA = 1.
<E1HR_U4>-NBREX = 1.

ENDLOOP.

LOOP AT IT_E1HR_U4 INTO WA_E1HR_U4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1HR_U4-EXAMT, sy-vline,
  WA_E1HR_U4-EXPCT, sy-vline,
  WA_E1HR_U4-ADEXN, sy-vline,
  WA_E1HR_U4-ADEXA, sy-vline,
  WA_E1HR_U4-AMTEX, sy-vline,
  WA_E1HR_U4-PEREX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1HR_U4 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_U4 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_U4 INTO WA_E1HR_U4.


*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_U4_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
TAURT TYPE STRING,
TXSTA TYPE STRING,
NBREX TYPE STRING,
EXAMT TYPE STRING,
EXPCT TYPE STRING,
ADEXN TYPE STRING,
ADEXA TYPE STRING,
AMTEX TYPE STRING,
PEREX TYPE STRING,
DEPEX TYPE STRING,
EICST TYPE STRING,
EXTCD TYPE STRING,
SUPCD TYPE STRING,
TAXLV TYPE STRING,
RWIND TYPE STRING,
ALLPC TYPE STRING,
REFID TYPE STRING,
MULT_JOBS_IND TYPE STRING,
DEPS_TOTAL_AMT TYPE STRING,
OTHER_INC_AMT TYPE STRING,
DEDUCT_AMT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1HR_U4_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_U4_STR-BEGDA sy-vline 
WA_E1HR_U4_STR-ENDDA sy-vline 
WA_E1HR_U4_STR-TAURT sy-vline 
WA_E1HR_U4_STR-TXSTA sy-vline 
WA_E1HR_U4_STR-NBREX sy-vline 
WA_E1HR_U4_STR-EXAMT sy-vline 
WA_E1HR_U4_STR-EXPCT sy-vline 
WA_E1HR_U4_STR-ADEXN sy-vline 
WA_E1HR_U4_STR-ADEXA sy-vline 
WA_E1HR_U4_STR-AMTEX sy-vline 
WA_E1HR_U4_STR-PEREX sy-vline 
WA_E1HR_U4_STR-DEPEX sy-vline 
WA_E1HR_U4_STR-EICST sy-vline 
WA_E1HR_U4_STR-EXTCD sy-vline 
WA_E1HR_U4_STR-SUPCD sy-vline 
WA_E1HR_U4_STR-TAXLV sy-vline 
WA_E1HR_U4_STR-RWIND sy-vline 
WA_E1HR_U4_STR-ALLPC sy-vline 
WA_E1HR_U4_STR-REFID sy-vline 
WA_E1HR_U4_STR-MULT_JOBS_IND sy-vline 
WA_E1HR_U4_STR-DEPS_TOTAL_AMT sy-vline 
WA_E1HR_U4_STR-OTHER_INC_AMT sy-vline 
WA_E1HR_U4_STR-DEDUCT_AMT sy-vline      INTO ld_text SEPARATED BY SPACE.

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