ABAP Select data from SAP table ESRLINE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESRLINE
*  INTO TABLE @DATA(IT_ESRLINE2).
*--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_ESRLINE INDEX 1 INTO DATA(WA_ESRLINE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESRLINE>-TRNTP = 1.
<ESRLINE>-TEILN = 1.
<ESRLINE>-REFNR = 1.
<ESRLINE>-WRBTR = 1.
<ESRLINE>-PAYRE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESRLINE-PAYDT, sy-vline,
  WA_ESRLINE-PRCDT, sy-vline,
  WA_ESRLINE-VALUT, sy-vline,
  WA_ESRLINE-MICNR, sy-vline,
  WA_ESRLINE-REJCT, sy-vline,
  WA_ESRLINE-RESER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESRLINE 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_ESRLINE 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_ESRLINE INTO WA_ESRLINE.


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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESRLINE-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESRLINE-KUNNR.
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_ESRLINE_STR, 
TRNTP TYPE STRING,
TEILN TYPE STRING,
REFNR TYPE STRING,
WRBTR TYPE STRING,
PAYRE TYPE STRING,
PAYDT TYPE STRING,
PRCDT TYPE STRING,
VALUT TYPE STRING,
MICNR TYPE STRING,
REJCT TYPE STRING,
RESER TYPE STRING,
EIZTX TYPE STRING,
BELNR TYPE STRING,
KUNID TYPE STRING,
KUNNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESRLINE_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_ESRLINE_STR-TRNTP sy-vline 
WA_ESRLINE_STR-TEILN sy-vline 
WA_ESRLINE_STR-REFNR sy-vline 
WA_ESRLINE_STR-WRBTR sy-vline 
WA_ESRLINE_STR-PAYRE sy-vline 
WA_ESRLINE_STR-PAYDT sy-vline 
WA_ESRLINE_STR-PRCDT sy-vline 
WA_ESRLINE_STR-VALUT sy-vline 
WA_ESRLINE_STR-MICNR sy-vline 
WA_ESRLINE_STR-REJCT sy-vline 
WA_ESRLINE_STR-RESER sy-vline 
WA_ESRLINE_STR-EIZTX sy-vline 
WA_ESRLINE_STR-BELNR sy-vline 
WA_ESRLINE_STR-KUNID sy-vline 
WA_ESRLINE_STR-KUNNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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