ABAP Select data from SAP table /GBT/S_NW_MATERIAL_BALANCE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /GBT/S_NW_MATERIAL_BALANCE 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 /GBT/S_NW_MATERIAL_BALANCE. 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 /GBT/S_NW_MATERIAL_BALANCE 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_/GBT/S_NW_MATERIAL_BALANCE TYPE STANDARD TABLE OF /GBT/S_NW_MATERIAL_BALANCE,
      WA_/GBT/S_NW_MATERIAL_BALANCE TYPE /GBT/S_NW_MATERIAL_BALANCE,
      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: </GBT/S_NW_MATERIAL_BALANCE> TYPE /GBT/S_NW_MATERIAL_BALANCE.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /GBT/S_NW_MATERIAL_BALANCE
  INTO TABLE IT_/GBT/S_NW_MATERIAL_BALANCE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /GBT/S_NW_MATERIAL_BALANCE
*  INTO TABLE @DATA(IT_/GBT/S_NW_MATERIAL_BALANCE2).
*--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_/GBT/S_NW_MATERIAL_BALANCE INDEX 1 INTO DATA(WA_/GBT/S_NW_MATERIAL_BALANCE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/GBT/S_NW_MATERIAL_BALANCE ASSIGNING </GBT/S_NW_MATERIAL_BALANCE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</GBT/S_NW_MATERIAL_BALANCE>-CHARG = 1.
</GBT/S_NW_MATERIAL_BALANCE>-MATNR = 1.
</GBT/S_NW_MATERIAL_BALANCE>-MAT_DESCR = 1.
</GBT/S_NW_MATERIAL_BALANCE>-LOGSYS = 1.
</GBT/S_NW_MATERIAL_BALANCE>-WERKS = 1.

ENDLOOP.

LOOP AT IT_/GBT/S_NW_MATERIAL_BALANCE INTO WA_/GBT/S_NW_MATERIAL_BALANCE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/GBT/S_NW_MATERIAL_BALANCE-WERKS_NAME, sy-vline,
  WA_/GBT/S_NW_MATERIAL_BALANCE-LGORT, sy-vline,
  WA_/GBT/S_NW_MATERIAL_BALANCE-LGORT_NAME, sy-vline,
  WA_/GBT/S_NW_MATERIAL_BALANCE-ICON, sy-vline,
  WA_/GBT/S_NW_MATERIAL_BALANCE-GRQUAN, sy-vline,
  WA_/GBT/S_NW_MATERIAL_BALANCE-GIQUAN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/GBT/S_NW_MATERIAL_BALANCE 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_/GBT/S_NW_MATERIAL_BALANCE 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_/GBT/S_NW_MATERIAL_BALANCE INTO WA_/GBT/S_NW_MATERIAL_BALANCE.


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

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

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

*Conversion exit CUNIT, internal->external for field DUMMY
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/GBT/S_NW_MATERIAL_BALANCE-DUMMY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/GBT/S_NW_MATERIAL_BALANCE-DUMMY.
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_/GBT/S_NW_MATERIAL_BALANCE_STR, 
CHARG TYPE STRING,
MATNR TYPE STRING,
MAT_DESCR TYPE STRING,
LOGSYS TYPE STRING,
WERKS TYPE STRING,
WERKS_NAME TYPE STRING,
LGORT TYPE STRING,
LGORT_NAME TYPE STRING,
ICON TYPE STRING,
GRQUAN TYPE STRING,
GIQUAN TYPE STRING,
MEINH TYPE STRING,
LABST TYPE STRING,
EINME TYPE STRING,
INSME TYPE STRING,
SPEME TYPE STRING,
UMLMD TYPE STRING,
DIF TYPE STRING,
SOBKZ TYPE STRING,
SSNUM TYPE STRING,
SSNUM_NAME TYPE STRING,
SPERR TYPE STRING,
RETME TYPE STRING,
TABNAME TYPE STRING,
DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/GBT/S_NW_MATERIAL_BALANCE_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_/GBT/S_NW_MATERIAL_BALANCE_STR-CHARG sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-MATNR sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-MAT_DESCR sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-LOGSYS sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-WERKS sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-WERKS_NAME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-LGORT sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-LGORT_NAME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-ICON sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-GRQUAN sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-GIQUAN sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-MEINH sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-LABST sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-EINME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-INSME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-SPEME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-UMLMD sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-DIF sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-SOBKZ sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-SSNUM sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-SSNUM_NAME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-SPERR sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-RETME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-TABNAME sy-vline 
WA_/GBT/S_NW_MATERIAL_BALANCE_STR-DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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