ABAP Select data from SAP table BASW_SWITCHING_LIST1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BASW_SWITCHING_LIST1 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 BASW_SWITCHING_LIST1. 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 BASW_SWITCHING_LIST1 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_BASW_SWITCHING_LIST1 TYPE STANDARD TABLE OF BASW_SWITCHING_LIST1,
      WA_BASW_SWITCHING_LIST1 TYPE BASW_SWITCHING_LIST1,
      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: <BASW_SWITCHING_LIST1> TYPE BASW_SWITCHING_LIST1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BASW_SWITCHING_LIST1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BASW_SWITCHING_LIST1
  INTO TABLE IT_BASW_SWITCHING_LIST1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BASW_SWITCHING_LIST1
*  INTO TABLE @DATA(IT_BASW_SWITCHING_LIST12).
*--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_BASW_SWITCHING_LIST1 INDEX 1 INTO DATA(WA_BASW_SWITCHING_LIST12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BASW_SWITCHING_LIST1 ASSIGNING <BASW_SWITCHING_LIST1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BASW_SWITCHING_LIST1>-SWITCH_NO = 1.
<BASW_SWITCHING_LIST1>-RTCUR = 1.
<BASW_SWITCHING_LIST1>-FGRUP_FR = 1.
<BASW_SWITCHING_LIST1>-FGRUP_FR_TEXT = 1.
<BASW_SWITCHING_LIST1>-FCOST_OBJ = 1.

ENDLOOP.

LOOP AT IT_BASW_SWITCHING_LIST1 INTO WA_BASW_SWITCHING_LIST1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BASW_SWITCHING_LIST1-FGRUP_TO, sy-vline,
  WA_BASW_SWITCHING_LIST1-FGRUP_TO_TEXT, sy-vline,
  WA_BASW_SWITCHING_LIST1-TCOST_OBJ, sy-vline,
  WA_BASW_SWITCHING_LIST1-TSL_C, sy-vline,
  WA_BASW_SWITCHING_LIST1-HSL_C, sy-vline,
  WA_BASW_SWITCHING_LIST1-LC2_C, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BASW_SWITCHING_LIST1 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_BASW_SWITCHING_LIST1 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_BASW_SWITCHING_LIST1 INTO WA_BASW_SWITCHING_LIST1.


*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_BASW_SWITCHING_LIST1_STR, 
SWITCH_NO TYPE STRING,
RTCUR TYPE STRING,
FGRUP_FR TYPE STRING,
FGRUP_FR_TEXT TYPE STRING,
FCOST_OBJ TYPE STRING,
FGRUP_TO TYPE STRING,
FGRUP_TO_TEXT TYPE STRING,
TCOST_OBJ TYPE STRING,
TSL_C TYPE STRING,
HSL_C TYPE STRING,
LC2_C TYPE STRING,
LC3_C TYPE STRING,
VALUT TYPE STRING,
BLDAT TYPE STRING,
INTEREST_INCURRED_DAYS TYPE STRING,
TSL_I TYPE STRING,
HSL_I TYPE STRING,
LC2_I TYPE STRING,
LC3_I TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BASW_SWITCHING_LIST1_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_BASW_SWITCHING_LIST1_STR-SWITCH_NO sy-vline 
WA_BASW_SWITCHING_LIST1_STR-RTCUR sy-vline 
WA_BASW_SWITCHING_LIST1_STR-FGRUP_FR sy-vline 
WA_BASW_SWITCHING_LIST1_STR-FGRUP_FR_TEXT sy-vline 
WA_BASW_SWITCHING_LIST1_STR-FCOST_OBJ sy-vline 
WA_BASW_SWITCHING_LIST1_STR-FGRUP_TO sy-vline 
WA_BASW_SWITCHING_LIST1_STR-FGRUP_TO_TEXT sy-vline 
WA_BASW_SWITCHING_LIST1_STR-TCOST_OBJ sy-vline 
WA_BASW_SWITCHING_LIST1_STR-TSL_C sy-vline 
WA_BASW_SWITCHING_LIST1_STR-HSL_C sy-vline 
WA_BASW_SWITCHING_LIST1_STR-LC2_C sy-vline 
WA_BASW_SWITCHING_LIST1_STR-LC3_C sy-vline 
WA_BASW_SWITCHING_LIST1_STR-VALUT sy-vline 
WA_BASW_SWITCHING_LIST1_STR-BLDAT sy-vline 
WA_BASW_SWITCHING_LIST1_STR-INTEREST_INCURRED_DAYS sy-vline 
WA_BASW_SWITCHING_LIST1_STR-TSL_I sy-vline 
WA_BASW_SWITCHING_LIST1_STR-HSL_I sy-vline 
WA_BASW_SWITCHING_LIST1_STR-LC2_I sy-vline 
WA_BASW_SWITCHING_LIST1_STR-LC3_I sy-vline      INTO ld_text SEPARATED BY SPACE.

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