ABAP Select data from SAP table SGT_PRE_LBE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SGT_PRE_LBE
*  INTO TABLE @DATA(IT_SGT_PRE_LBE2).
*--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_SGT_PRE_LBE INDEX 1 INTO DATA(WA_SGT_PRE_LBE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SGT_PRE_LBE>-MATNR = 1.
<SGT_PRE_LBE>-WERKS = 1.
<SGT_PRE_LBE>-LGORT = 1.
<SGT_PRE_LBE>-SATNR = 1.
<SGT_PRE_LBE>-LGPBE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SGT_PRE_LBE-LVORM, sy-vline,
  WA_SGT_PRE_LBE-LABST, sy-vline,
  WA_SGT_PRE_LBE-UMLME, sy-vline,
  WA_SGT_PRE_LBE-INSME, sy-vline,
  WA_SGT_PRE_LBE-EINME, sy-vline,
  WA_SGT_PRE_LBE-SPEME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SGT_PRE_LBE 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_SGT_PRE_LBE 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_SGT_PRE_LBE INTO WA_SGT_PRE_LBE.


*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_SGT_PRE_LBE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SGT_PRE_LBE-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field SATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_SGT_PRE_LBE-SATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SGT_PRE_LBE-SATNR.
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_SGT_PRE_LBE_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
SATNR TYPE STRING,
LGPBE TYPE STRING,
LVORM TYPE STRING,
LABST TYPE STRING,
UMLME TYPE STRING,
INSME TYPE STRING,
EINME TYPE STRING,
SPEME TYPE STRING,
RETME TYPE STRING,
VBMNA TYPE STRING,
VBMNB TYPE STRING,
VBMNC TYPE STRING,
VBMNE TYPE STRING,
VBMNG TYPE STRING,
VBMNI TYPE STRING,
OMENG TYPE STRING,
MENGE TYPE STRING,
MENGK TYPE STRING,
BDMNG TYPE STRING,
BDMNS TYPE STRING,
KLABS TYPE STRING,
KINSM TYPE STRING,
KEINM TYPE STRING,
KSPEM TYPE STRING,
KALAB TYPE STRING,
KAINS TYPE STRING,
KASPE TYPE STRING,
KAEIN TYPE STRING,
MLABS TYPE STRING,
MINSM TYPE STRING,
MEINM TYPE STRING,
MSPEM TYPE STRING,
PRLAB TYPE STRING,
PRINS TYPE STRING,
PRSPE TYPE STRING,
PREIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SGT_PRE_LBE_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_SGT_PRE_LBE_STR-MATNR sy-vline 
WA_SGT_PRE_LBE_STR-WERKS sy-vline 
WA_SGT_PRE_LBE_STR-LGORT sy-vline 
WA_SGT_PRE_LBE_STR-SATNR sy-vline 
WA_SGT_PRE_LBE_STR-LGPBE sy-vline 
WA_SGT_PRE_LBE_STR-LVORM sy-vline 
WA_SGT_PRE_LBE_STR-LABST sy-vline 
WA_SGT_PRE_LBE_STR-UMLME sy-vline 
WA_SGT_PRE_LBE_STR-INSME sy-vline 
WA_SGT_PRE_LBE_STR-EINME sy-vline 
WA_SGT_PRE_LBE_STR-SPEME sy-vline 
WA_SGT_PRE_LBE_STR-RETME sy-vline 
WA_SGT_PRE_LBE_STR-VBMNA sy-vline 
WA_SGT_PRE_LBE_STR-VBMNB sy-vline 
WA_SGT_PRE_LBE_STR-VBMNC sy-vline 
WA_SGT_PRE_LBE_STR-VBMNE sy-vline 
WA_SGT_PRE_LBE_STR-VBMNG sy-vline 
WA_SGT_PRE_LBE_STR-VBMNI sy-vline 
WA_SGT_PRE_LBE_STR-OMENG sy-vline 
WA_SGT_PRE_LBE_STR-MENGE sy-vline 
WA_SGT_PRE_LBE_STR-MENGK sy-vline 
WA_SGT_PRE_LBE_STR-BDMNG sy-vline 
WA_SGT_PRE_LBE_STR-BDMNS sy-vline 
WA_SGT_PRE_LBE_STR-KLABS sy-vline 
WA_SGT_PRE_LBE_STR-KINSM sy-vline 
WA_SGT_PRE_LBE_STR-KEINM sy-vline 
WA_SGT_PRE_LBE_STR-KSPEM sy-vline 
WA_SGT_PRE_LBE_STR-KALAB sy-vline 
WA_SGT_PRE_LBE_STR-KAINS sy-vline 
WA_SGT_PRE_LBE_STR-KASPE sy-vline 
WA_SGT_PRE_LBE_STR-KAEIN sy-vline 
WA_SGT_PRE_LBE_STR-MLABS sy-vline 
WA_SGT_PRE_LBE_STR-MINSM sy-vline 
WA_SGT_PRE_LBE_STR-MEINM sy-vline 
WA_SGT_PRE_LBE_STR-MSPEM sy-vline 
WA_SGT_PRE_LBE_STR-PRLAB sy-vline 
WA_SGT_PRE_LBE_STR-PRINS sy-vline 
WA_SGT_PRE_LBE_STR-PRSPE sy-vline 
WA_SGT_PRE_LBE_STR-PREIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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