ABAP Select data from SAP table BDI_LSHDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BDI_LSHDR
*  INTO TABLE @DATA(IT_BDI_LSHDR2).
*--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_BDI_LSHDR INDEX 1 INTO DATA(WA_BDI_LSHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BDI_LSHDR>-LOGSYS_OLD = 1.
<BDI_LSHDR>-LOGSYS_NEW = 1.
<BDI_LSHDR>-COUNTER = 1.
<BDI_LSHDR>-STATUS = 1.
<BDI_LSHDR>-INITIATOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BDI_LSHDR-JOBNUMBER, sy-vline,
  WA_BDI_LSHDR-JOBNAME, sy-vline,
  WA_BDI_LSHDR-USERNAME, sy-vline,
  WA_BDI_LSHDR-CDATE, sy-vline,
  WA_BDI_LSHDR-CTIME, sy-vline,
  WA_BDI_LSHDR-CUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BDI_LSHDR 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_BDI_LSHDR 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_BDI_LSHDR INTO WA_BDI_LSHDR.


*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 LOGSYS_OLD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BDI_LSHDR-LOGSYS_OLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BDI_LSHDR-LOGSYS_OLD.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field INITIATOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BDI_LSHDR-INITIATOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BDI_LSHDR-INITIATOR.
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_BDI_LSHDR_STR, 
LOGSYS_OLD TYPE STRING,
LOGSYS_NEW TYPE STRING,
COUNTER TYPE STRING,
STATUS TYPE STRING,
INITIATOR TYPE STRING,
JOBNUMBER TYPE STRING,
JOBNAME TYPE STRING,
USERNAME TYPE STRING,
CDATE TYPE STRING,
CTIME TYPE STRING,
CUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BDI_LSHDR_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_BDI_LSHDR_STR-LOGSYS_OLD sy-vline 
WA_BDI_LSHDR_STR-LOGSYS_NEW sy-vline 
WA_BDI_LSHDR_STR-COUNTER sy-vline 
WA_BDI_LSHDR_STR-STATUS sy-vline 
WA_BDI_LSHDR_STR-INITIATOR sy-vline 
WA_BDI_LSHDR_STR-JOBNUMBER sy-vline 
WA_BDI_LSHDR_STR-JOBNAME sy-vline 
WA_BDI_LSHDR_STR-USERNAME sy-vline 
WA_BDI_LSHDR_STR-CDATE sy-vline 
WA_BDI_LSHDR_STR-CTIME sy-vline 
WA_BDI_LSHDR_STR-CUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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