ABAP Select data from SAP table BAPI_SGT_MRP_GN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_SGT_MRP_GN
*  INTO TABLE @DATA(IT_BAPI_SGT_MRP_GN2).
*--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_BAPI_SGT_MRP_GN INDEX 1 INTO DATA(WA_BAPI_SGT_MRP_GN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_SGT_MRP_GN>-PLANT = 1.
<BAPI_SGT_MRP_GN>-STOCK_SEGMENT = 1.
<BAPI_SGT_MRP_GN>-INHSEPRODT = 1.
<BAPI_SGT_MRP_GN>-PUR_GROUP = 1.
<BAPI_SGT_MRP_GN>-PLND_DELRY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_SGT_MRP_GN-SAFTY_T_ID, sy-vline,
  WA_BAPI_SGT_MRP_GN-SAFETYTIME, sy-vline,
  WA_BAPI_SGT_MRP_GN-REPLENTIME, sy-vline,
  WA_BAPI_SGT_MRP_GN-ATP_MRP_STATUS, sy-vline,
  WA_BAPI_SGT_MRP_GN-SEGMENTATION_VALIDFROM, sy-vline,
  WA_BAPI_SGT_MRP_GN-STK_SEG_LONG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_SGT_MRP_GN 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_BAPI_SGT_MRP_GN 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_BAPI_SGT_MRP_GN INTO WA_BAPI_SGT_MRP_GN.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BAPI_SGT_MRP_GN_STR, 
PLANT TYPE STRING,
STOCK_SEGMENT TYPE STRING,
INHSEPRODT TYPE STRING,
PUR_GROUP TYPE STRING,
PLND_DELRY TYPE STRING,
SAFTY_T_ID TYPE STRING,
SAFETYTIME TYPE STRING,
REPLENTIME TYPE STRING,
ATP_MRP_STATUS TYPE STRING,
SEGMENTATION_VALIDFROM TYPE STRING,
STK_SEG_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_SGT_MRP_GN_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_BAPI_SGT_MRP_GN_STR-PLANT sy-vline 
WA_BAPI_SGT_MRP_GN_STR-STOCK_SEGMENT sy-vline 
WA_BAPI_SGT_MRP_GN_STR-INHSEPRODT sy-vline 
WA_BAPI_SGT_MRP_GN_STR-PUR_GROUP sy-vline 
WA_BAPI_SGT_MRP_GN_STR-PLND_DELRY sy-vline 
WA_BAPI_SGT_MRP_GN_STR-SAFTY_T_ID sy-vline 
WA_BAPI_SGT_MRP_GN_STR-SAFETYTIME sy-vline 
WA_BAPI_SGT_MRP_GN_STR-REPLENTIME sy-vline 
WA_BAPI_SGT_MRP_GN_STR-ATP_MRP_STATUS sy-vline 
WA_BAPI_SGT_MRP_GN_STR-SEGMENTATION_VALIDFROM sy-vline 
WA_BAPI_SGT_MRP_GN_STR-STK_SEG_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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