ABAP Select data from SAP table MESCR_STP_HDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MESCR_STP_HDR
*  INTO TABLE @DATA(IT_MESCR_STP_HDR2).
*--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_MESCR_STP_HDR INDEX 1 INTO DATA(WA_MESCR_STP_HDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MESCR_STP_HDR>-LIFNR = 1.
<MESCR_STP_HDR>-NAME1 = 1.
<MESCR_STP_HDR>-ORT01 = 1.
<MESCR_STP_HDR>-EKORG = 1.
<MESCR_STP_HDR>-EBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MESCR_STP_HDR-EBELP, sy-vline,
  WA_MESCR_STP_HDR-WERKS, sy-vline,
  WA_MESCR_STP_HDR-MATNR, sy-vline,
  WA_MESCR_STP_HDR-BERID, sy-vline,
  WA_MESCR_STP_HDR-LGORT, sy-vline,
  WA_MESCR_STP_HDR-LGBZO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MESCR_STP_HDR 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_MESCR_STP_HDR 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_MESCR_STP_HDR INTO WA_MESCR_STP_HDR.


*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_MESCR_STP_HDR-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MESCR_STP_HDR-LIFNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field ADDRNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MESCR_STP_HDR-ADDRNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MESCR_STP_HDR-ADDRNUM.
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_MESCR_STP_HDR_STR, 
LIFNR TYPE STRING,
NAME1 TYPE STRING,
ORT01 TYPE STRING,
EKORG TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
BERID TYPE STRING,
LGORT TYPE STRING,
LGBZO TYPE STRING,
MEINS TYPE STRING,
ABEFZ TYPE STRING,
WEBRE TYPE STRING,
TXZ01 TYPE STRING,
DISPO TYPE STRING,
MFZHI TYPE STRING,
FFZHI TYPE STRING,
FABKZ TYPE STRING,
ADDRNUM TYPE STRING,
CONSNUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MESCR_STP_HDR_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_MESCR_STP_HDR_STR-LIFNR sy-vline 
WA_MESCR_STP_HDR_STR-NAME1 sy-vline 
WA_MESCR_STP_HDR_STR-ORT01 sy-vline 
WA_MESCR_STP_HDR_STR-EKORG sy-vline 
WA_MESCR_STP_HDR_STR-EBELN sy-vline 
WA_MESCR_STP_HDR_STR-EBELP sy-vline 
WA_MESCR_STP_HDR_STR-WERKS sy-vline 
WA_MESCR_STP_HDR_STR-MATNR sy-vline 
WA_MESCR_STP_HDR_STR-BERID sy-vline 
WA_MESCR_STP_HDR_STR-LGORT sy-vline 
WA_MESCR_STP_HDR_STR-LGBZO sy-vline 
WA_MESCR_STP_HDR_STR-MEINS sy-vline 
WA_MESCR_STP_HDR_STR-ABEFZ sy-vline 
WA_MESCR_STP_HDR_STR-WEBRE sy-vline 
WA_MESCR_STP_HDR_STR-TXZ01 sy-vline 
WA_MESCR_STP_HDR_STR-DISPO sy-vline 
WA_MESCR_STP_HDR_STR-MFZHI sy-vline 
WA_MESCR_STP_HDR_STR-FFZHI sy-vline 
WA_MESCR_STP_HDR_STR-FABKZ sy-vline 
WA_MESCR_STP_HDR_STR-ADDRNUM sy-vline 
WA_MESCR_STP_HDR_STR-CONSNUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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