ABAP Select data from SAP table ESLH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESLH
*  INTO TABLE @DATA(IT_ESLH2).
*--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_ESLH INDEX 1 INTO DATA(WA_ESLH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESLH>-MANDT = 1.
<ESLH>-PACKNO = 1.
<ESLH>-DEL = 1.
<ESLH>-FPACKNO = 1.
<ESLH>-HPACKNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESLH-KNUMV, sy-vline,
  WA_ESLH-EBELN, sy-vline,
  WA_ESLH-EBELP, sy-vline,
  WA_ESLH-BSTYP, sy-vline,
  WA_ESLH-WAERS, sy-vline,
  WA_ESLH-CUOBJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESLH 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_ESLH 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_ESLH INTO WA_ESLH.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESLH-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESLH-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field IWEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ESLH-IWEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESLH-IWEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_ESLH-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESLH-WKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESLH-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESLH-VBELN.
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_ESLH_STR, 
MANDT TYPE STRING,
PACKNO TYPE STRING,
DEL TYPE STRING,
FPACKNO TYPE STRING,
HPACKNO TYPE STRING,
KNUMV TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BSTYP TYPE STRING,
WAERS TYPE STRING,
CUOBJ TYPE STRING,
SUM_NETWR TYPE STRING,
IWEIN TYPE STRING,
SUM_WORK TYPE STRING,
INT_USE TYPE STRING,
WKURS TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
VBTYP TYPE STRING,
_DATAAGING TYPE STRING,
BOSFSHT TYPE STRING,
BOSVERSION TYPE STRING,
BOSCALC TYPE STRING,
BOSKLVAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESLH_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_ESLH_STR-MANDT sy-vline 
WA_ESLH_STR-PACKNO sy-vline 
WA_ESLH_STR-DEL sy-vline 
WA_ESLH_STR-FPACKNO sy-vline 
WA_ESLH_STR-HPACKNO sy-vline 
WA_ESLH_STR-KNUMV sy-vline 
WA_ESLH_STR-EBELN sy-vline 
WA_ESLH_STR-EBELP sy-vline 
WA_ESLH_STR-BSTYP sy-vline 
WA_ESLH_STR-WAERS sy-vline 
WA_ESLH_STR-CUOBJ sy-vline 
WA_ESLH_STR-SUM_NETWR sy-vline 
WA_ESLH_STR-IWEIN sy-vline 
WA_ESLH_STR-SUM_WORK sy-vline 
WA_ESLH_STR-INT_USE sy-vline 
WA_ESLH_STR-WKURS sy-vline 
WA_ESLH_STR-VBELN sy-vline 
WA_ESLH_STR-POSNR sy-vline 
WA_ESLH_STR-VBTYP sy-vline 
WA_ESLH_STR-_DATAAGING sy-vline 
WA_ESLH_STR-BOSFSHT sy-vline 
WA_ESLH_STR-BOSVERSION sy-vline 
WA_ESLH_STR-BOSCALC sy-vline 
WA_ESLH_STR-BOSKLVAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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