ABAP Select data from SAP table LSO_BIW_GET_ATTENDAN_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LSO_BIW_GET_ATTENDAN_DATA
*  INTO TABLE @DATA(IT_LSO_BIW_GET_ATTENDAN_DATA2).
*--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_LSO_BIW_GET_ATTENDAN_DATA INDEX 1 INTO DATA(WA_LSO_BIW_GET_ATTENDAN_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LSO_BIW_GET_ATTENDAN_DATA>-CALDAY = 1.
<LSO_BIW_GET_ATTENDAN_DATA>-GRPID = 1.
<LSO_BIW_GET_ATTENDAN_DATA>-TRAINTYPID = 1.
<LSO_BIW_GET_ATTENDAN_DATA>-TRAINTYPOTYP = 1.
<LSO_BIW_GET_ATTENDAN_DATA>-TRAINID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LSO_BIW_GET_ATTENDAN_DATA-TRAINOTYPE, sy-vline,
  WA_LSO_BIW_GET_ATTENDAN_DATA-PATYP, sy-vline,
  WA_LSO_BIW_GET_ATTENDAN_DATA-PARID, sy-vline,
  WA_LSO_BIW_GET_ATTENDAN_DATA-TPARTDOCNO, sy-vline,
  WA_LSO_BIW_GET_ATTENDAN_DATA-TNUMEBOS, sy-vline,
  WA_LSO_BIW_GET_ATTENDAN_DATA-TNUMELUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LSO_BIW_GET_ATTENDAN_DATA 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_LSO_BIW_GET_ATTENDAN_DATA 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_LSO_BIW_GET_ATTENDAN_DATA INTO WA_LSO_BIW_GET_ATTENDAN_DATA.


*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 ALPHA, internal->external for field TPARTDOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LSO_BIW_GET_ATTENDAN_DATA-TPARTDOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LSO_BIW_GET_ATTENDAN_DATA-TPARTDOCNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LSO_BIW_GET_ATTENDAN_DATA-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LSO_BIW_GET_ATTENDAN_DATA-KOSTL.
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_LSO_BIW_GET_ATTENDAN_DATA_STR, 
CALDAY TYPE STRING,
GRPID TYPE STRING,
TRAINTYPID TYPE STRING,
TRAINTYPOTYP TYPE STRING,
TRAINID TYPE STRING,
TRAINOTYPE TYPE STRING,
PATYP TYPE STRING,
PARID TYPE STRING,
TPARTDOCNO TYPE STRING,
TNUMEBOS TYPE STRING,
TNUMELUS TYPE STRING,
TTIMECRS TYPE STRING,
SCORE TYPE STRING,
PASSED TYPE STRING,
PRIOX TYPE STRING,
MANZL TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
KKOST TYPE STRING,
KWAER TYPE STRING,
INTEX TYPE STRING,
STATUS TYPE STRING,
CONFIRMED TYPE STRING,
FAILED TYPE STRING,
FOLLOW_UP TYPE STRING,
ACHIEVEMENT TYPE STRING,
OADP_ORGVIEW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LSO_BIW_GET_ATTENDAN_DATA_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_LSO_BIW_GET_ATTENDAN_DATA_STR-CALDAY sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-GRPID sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TRAINTYPID sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TRAINTYPOTYP sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TRAINID sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TRAINOTYPE sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-PATYP sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-PARID sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TPARTDOCNO sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TNUMEBOS sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TNUMELUS sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-TTIMECRS sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-SCORE sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-PASSED sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-PRIOX sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-MANZL sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-KOKRS sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-KOSTL sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-KKOST sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-KWAER sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-INTEX sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-STATUS sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-CONFIRMED sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-FAILED sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-FOLLOW_UP sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-ACHIEVEMENT sy-vline 
WA_LSO_BIW_GET_ATTENDAN_DATA_STR-OADP_ORGVIEW sy-vline      INTO ld_text SEPARATED BY SPACE.

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