ABAP Select data from SAP table ESO_S_MSEG_GR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESO_S_MSEG_GR
*  INTO TABLE @DATA(IT_ESO_S_MSEG_GR2).
*--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_ESO_S_MSEG_GR INDEX 1 INTO DATA(WA_ESO_S_MSEG_GR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESO_S_MSEG_GR>-MBLNR = 1.
<ESO_S_MSEG_GR>-MJAHR = 1.
<ESO_S_MSEG_GR>-ZEILE = 1.
<ESO_S_MSEG_GR>-BWART = 1.
<ESO_S_MSEG_GR>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESO_S_MSEG_GR-WERKS, sy-vline,
  WA_ESO_S_MSEG_GR-LGORT, sy-vline,
  WA_ESO_S_MSEG_GR-SOBKZ, sy-vline,
  WA_ESO_S_MSEG_GR-LIFNR, sy-vline,
  WA_ESO_S_MSEG_GR-KUNNR, sy-vline,
  WA_ESO_S_MSEG_GR-KDAUF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESO_S_MSEG_GR 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_ESO_S_MSEG_GR 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_ESO_S_MSEG_GR INTO WA_ESO_S_MSEG_GR.


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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_MSEG_GR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_MSEG_GR-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_MSEG_GR-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_MSEG_GR-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field MAT_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ESO_S_MSEG_GR-MAT_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESO_S_MSEG_GR-MAT_PSPNR.
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_ESO_S_MSEG_GR_STR, 
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
BWART TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
SHKZG TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LFBJA TYPE STRING,
LFBNR TYPE STRING,
LFPOS TYPE STRING,
SJAHR TYPE STRING,
SMBLN TYPE STRING,
SMBLP TYPE STRING,
AUFNR TYPE STRING,
BUKRS TYPE STRING,
PS_PSP_PNR TYPE STRING,
MAT_KDAUF TYPE STRING,
MAT_KDPOS TYPE STRING,
MAT_PSPNR TYPE STRING,
TCODE2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESO_S_MSEG_GR_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_ESO_S_MSEG_GR_STR-MBLNR sy-vline 
WA_ESO_S_MSEG_GR_STR-MJAHR sy-vline 
WA_ESO_S_MSEG_GR_STR-ZEILE sy-vline 
WA_ESO_S_MSEG_GR_STR-BWART sy-vline 
WA_ESO_S_MSEG_GR_STR-MATNR sy-vline 
WA_ESO_S_MSEG_GR_STR-WERKS sy-vline 
WA_ESO_S_MSEG_GR_STR-LGORT sy-vline 
WA_ESO_S_MSEG_GR_STR-SOBKZ sy-vline 
WA_ESO_S_MSEG_GR_STR-LIFNR sy-vline 
WA_ESO_S_MSEG_GR_STR-KUNNR sy-vline 
WA_ESO_S_MSEG_GR_STR-KDAUF sy-vline 
WA_ESO_S_MSEG_GR_STR-KDPOS sy-vline 
WA_ESO_S_MSEG_GR_STR-SHKZG sy-vline 
WA_ESO_S_MSEG_GR_STR-MENGE sy-vline 
WA_ESO_S_MSEG_GR_STR-MEINS sy-vline 
WA_ESO_S_MSEG_GR_STR-ERFMG sy-vline 
WA_ESO_S_MSEG_GR_STR-ERFME sy-vline 
WA_ESO_S_MSEG_GR_STR-EBELN sy-vline 
WA_ESO_S_MSEG_GR_STR-EBELP sy-vline 
WA_ESO_S_MSEG_GR_STR-LFBJA sy-vline 
WA_ESO_S_MSEG_GR_STR-LFBNR sy-vline 
WA_ESO_S_MSEG_GR_STR-LFPOS sy-vline 
WA_ESO_S_MSEG_GR_STR-SJAHR sy-vline 
WA_ESO_S_MSEG_GR_STR-SMBLN sy-vline 
WA_ESO_S_MSEG_GR_STR-SMBLP sy-vline 
WA_ESO_S_MSEG_GR_STR-AUFNR sy-vline 
WA_ESO_S_MSEG_GR_STR-BUKRS sy-vline 
WA_ESO_S_MSEG_GR_STR-PS_PSP_PNR sy-vline 
WA_ESO_S_MSEG_GR_STR-MAT_KDAUF sy-vline 
WA_ESO_S_MSEG_GR_STR-MAT_KDPOS sy-vline 
WA_ESO_S_MSEG_GR_STR-MAT_PSPNR sy-vline 
WA_ESO_S_MSEG_GR_STR-TCODE2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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