ABAP Select data from SAP table BLGL_DETLIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BLGL_DETLIST
*  INTO TABLE @DATA(IT_BLGL_DETLIST2).
*--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_BLGL_DETLIST INDEX 1 INTO DATA(WA_BLGL_DETLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BLGL_DETLIST>-WERKS = 1.
<BLGL_DETLIST>-DISPO = 1.
<BLGL_DETLIST>-MATNR = 1.
<BLGL_DETLIST>-MAKTX = 1.
<BLGL_DETLIST>-LIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BLGL_DETLIST-LFNAM, sy-vline,
  WA_BLGL_DETLIST-IDNLF, sy-vline,
  WA_BLGL_DETLIST-EKGRP, sy-vline,
  WA_BLGL_DETLIST-EBELN, sy-vline,
  WA_BLGL_DETLIST-EBELP, sy-vline,
  WA_BLGL_DETLIST-BSART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BLGL_DETLIST 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_BLGL_DETLIST 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_BLGL_DETLIST INTO WA_BLGL_DETLIST.


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

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

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

*Conversion exit CUNIT, internal->external for field BMEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BLGL_DETLIST-BMEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BLGL_DETLIST-BMEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BLGL_DETLIST-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BLGL_DETLIST-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LFNKD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BLGL_DETLIST-LFNKD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BLGL_DETLIST-LFNKD.
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_BLGL_DETLIST_STR, 
WERKS TYPE STRING,
DISPO TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
LIFNR TYPE STRING,
LFNAM TYPE STRING,
IDNLF TYPE STRING,
EKGRP TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BSART TYPE STRING,
KANBA TYPE STRING,
EINDT TYPE STRING,
ETMNG TYPE STRING,
WEMNG TYPE STRING,
BMEIN_D TYPE STRING,
BMEIN TYPE STRING,
MEINS_D TYPE STRING,
MEINS TYPE STRING,
OMNG TYPE STRING,
ABART TYPE STRING,
ABRUF TYPE STRING,
JCPOS TYPE STRING,
LFNKD TYPE STRING,
LWEDT TYPE STRING,
AVMNG TYPE STRING,
OAMNG TYPE STRING,
LABST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BLGL_DETLIST_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_BLGL_DETLIST_STR-WERKS sy-vline 
WA_BLGL_DETLIST_STR-DISPO sy-vline 
WA_BLGL_DETLIST_STR-MATNR sy-vline 
WA_BLGL_DETLIST_STR-MAKTX sy-vline 
WA_BLGL_DETLIST_STR-LIFNR sy-vline 
WA_BLGL_DETLIST_STR-LFNAM sy-vline 
WA_BLGL_DETLIST_STR-IDNLF sy-vline 
WA_BLGL_DETLIST_STR-EKGRP sy-vline 
WA_BLGL_DETLIST_STR-EBELN sy-vline 
WA_BLGL_DETLIST_STR-EBELP sy-vline 
WA_BLGL_DETLIST_STR-BSART sy-vline 
WA_BLGL_DETLIST_STR-KANBA sy-vline 
WA_BLGL_DETLIST_STR-EINDT sy-vline 
WA_BLGL_DETLIST_STR-ETMNG sy-vline 
WA_BLGL_DETLIST_STR-WEMNG sy-vline 
WA_BLGL_DETLIST_STR-BMEIN_D sy-vline 
WA_BLGL_DETLIST_STR-BMEIN sy-vline 
WA_BLGL_DETLIST_STR-MEINS_D sy-vline 
WA_BLGL_DETLIST_STR-MEINS sy-vline 
WA_BLGL_DETLIST_STR-OMNG sy-vline 
WA_BLGL_DETLIST_STR-ABART sy-vline 
WA_BLGL_DETLIST_STR-ABRUF sy-vline 
WA_BLGL_DETLIST_STR-JCPOS sy-vline 
WA_BLGL_DETLIST_STR-LFNKD sy-vline 
WA_BLGL_DETLIST_STR-LWEDT sy-vline 
WA_BLGL_DETLIST_STR-AVMNG sy-vline 
WA_BLGL_DETLIST_STR-OAMNG sy-vline 
WA_BLGL_DETLIST_STR-LABST sy-vline      INTO ld_text SEPARATED BY SPACE.

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