ABAP Select data from SAP table ERSALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERSALV
*  INTO TABLE @DATA(IT_ERSALV2).
*--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_ERSALV INDEX 1 INTO DATA(WA_ERSALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERSALV>-ABRECHENBAR = 1.
<ERSALV>-LIFNR = 1.
<ERSALV>-LFBNR = 1.
<ERSALV>-LFGJA = 1.
<ERSALV>-LFPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERSALV-EBELN, sy-vline,
  WA_ERSALV-EBELP, sy-vline,
  WA_ERSALV-BELNR, sy-vline,
  WA_ERSALV-GJAHR, sy-vline,
  WA_ERSALV-BUZEI, sy-vline,
  WA_ERSALV-XBLNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERSALV 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_ERSALV 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_ERSALV INTO WA_ERSALV.


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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field TOR_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERSALV-TOR_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERSALV-TOR_ID.
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_ERSALV_STR, 
ABRECHENBAR TYPE STRING,
LIFNR TYPE STRING,
LFBNR TYPE STRING,
LFGJA TYPE STRING,
LFPOS TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
XBLNR TYPE STRING,
RBELNR TYPE STRING,
RGJAHR TYPE STRING,
TEXT TYPE STRING,
FIBEL TYPE STRING,
XEKBZ TYPE STRING,
FRBNR TYPE STRING,
TOR_ID TYPE STRING,
SRCE_LOC TYPE STRING,
DEST_LOC TYPE STRING,
PICKUP_D TYPE STRING,
DEL_D TYPE STRING,
LONGNUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERSALV_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_ERSALV_STR-ABRECHENBAR sy-vline 
WA_ERSALV_STR-LIFNR sy-vline 
WA_ERSALV_STR-LFBNR sy-vline 
WA_ERSALV_STR-LFGJA sy-vline 
WA_ERSALV_STR-LFPOS sy-vline 
WA_ERSALV_STR-EBELN sy-vline 
WA_ERSALV_STR-EBELP sy-vline 
WA_ERSALV_STR-BELNR sy-vline 
WA_ERSALV_STR-GJAHR sy-vline 
WA_ERSALV_STR-BUZEI sy-vline 
WA_ERSALV_STR-XBLNR sy-vline 
WA_ERSALV_STR-RBELNR sy-vline 
WA_ERSALV_STR-RGJAHR sy-vline 
WA_ERSALV_STR-TEXT sy-vline 
WA_ERSALV_STR-FIBEL sy-vline 
WA_ERSALV_STR-XEKBZ sy-vline 
WA_ERSALV_STR-FRBNR sy-vline 
WA_ERSALV_STR-TOR_ID sy-vline 
WA_ERSALV_STR-SRCE_LOC sy-vline 
WA_ERSALV_STR-DEST_LOC sy-vline 
WA_ERSALV_STR-PICKUP_D sy-vline 
WA_ERSALV_STR-DEL_D sy-vline 
WA_ERSALV_STR-LONGNUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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