ABAP Select data from SAP table /IWBEP/L_ST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /IWBEP/L_ST
*  INTO TABLE @DATA(IT_/IWBEP/L_ST2).
*--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_/IWBEP/L_ST INDEX 1 INTO DATA(WA_/IWBEP/L_ST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</IWBEP/L_ST>-MANDT = 1.
</IWBEP/L_ST>-SERVICE_NAME = 1.
</IWBEP/L_ST>-SERVICE_VERSION = 1.
</IWBEP/L_ST>-ENTITY_TYPE_NAME = 1.
</IWBEP/L_ST>-IS_FOR_EXPAND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/IWBEP/L_ST-LAST_MODIFIED, sy-vline,
  WA_/IWBEP/L_ST-DEFAULT_NAMESP, sy-vline,
  WA_/IWBEP/L_ST-TRANS_NAME, sy-vline,
  WA_/IWBEP/L_ST-RESULT_TYPE, sy-vline,
  WA_/IWBEP/L_ST-ACTIVE, sy-vline,
  WA_/IWBEP/L_ST-NW_VERSION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/IWBEP/L_ST 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_/IWBEP/L_ST 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_/IWBEP/L_ST INTO WA_/IWBEP/L_ST.


*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_/IWBEP/L_ST_STR, 
MANDT TYPE STRING,
SERVICE_NAME TYPE STRING,
SERVICE_VERSION TYPE STRING,
ENTITY_TYPE_NAME TYPE STRING,
IS_FOR_EXPAND TYPE STRING,
LAST_MODIFIED TYPE STRING,
DEFAULT_NAMESP TYPE STRING,
TRANS_NAME TYPE STRING,
RESULT_TYPE TYPE STRING,
ACTIVE TYPE STRING,
NW_VERSION TYPE STRING,
BEP_COMP_VERSION TYPE STRING,
BEP_SP_VERSION TYPE STRING,
GWBEP_VERSION TYPE STRING,
TRANS_GEN_VER TYPE STRING,
CREATION_DATE TYPE STRING,
INVALID TYPE STRING,
GEN_ERROR TYPE STRING,
DC_MED_INVALID TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_AT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/IWBEP/L_ST_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_/IWBEP/L_ST_STR-MANDT sy-vline 
WA_/IWBEP/L_ST_STR-SERVICE_NAME sy-vline 
WA_/IWBEP/L_ST_STR-SERVICE_VERSION sy-vline 
WA_/IWBEP/L_ST_STR-ENTITY_TYPE_NAME sy-vline 
WA_/IWBEP/L_ST_STR-IS_FOR_EXPAND sy-vline 
WA_/IWBEP/L_ST_STR-LAST_MODIFIED sy-vline 
WA_/IWBEP/L_ST_STR-DEFAULT_NAMESP sy-vline 
WA_/IWBEP/L_ST_STR-TRANS_NAME sy-vline 
WA_/IWBEP/L_ST_STR-RESULT_TYPE sy-vline 
WA_/IWBEP/L_ST_STR-ACTIVE sy-vline 
WA_/IWBEP/L_ST_STR-NW_VERSION sy-vline 
WA_/IWBEP/L_ST_STR-BEP_COMP_VERSION sy-vline 
WA_/IWBEP/L_ST_STR-BEP_SP_VERSION sy-vline 
WA_/IWBEP/L_ST_STR-GWBEP_VERSION sy-vline 
WA_/IWBEP/L_ST_STR-TRANS_GEN_VER sy-vline 
WA_/IWBEP/L_ST_STR-CREATION_DATE sy-vline 
WA_/IWBEP/L_ST_STR-INVALID sy-vline 
WA_/IWBEP/L_ST_STR-GEN_ERROR sy-vline 
WA_/IWBEP/L_ST_STR-DC_MED_INVALID sy-vline 
WA_/IWBEP/L_ST_STR-CHANGED_BY sy-vline 
WA_/IWBEP/L_ST_STR-CHANGED_AT sy-vline      INTO ld_text SEPARATED BY SPACE.

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