ABAP Select data from SAP table LDLBH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LDLBH
*  INTO TABLE @DATA(IT_LDLBH2).
*--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_LDLBH INDEX 1 INTO DATA(WA_LDLBH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LDLBH>-MANDT = 1.
<LDLBH>-LNID = 1.
<LDLBH>-LBVER = 1.
<LDLBH>-STATU = 1.
<LDLBH>-LD_PERST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LDLBH-LD_PERED, sy-vline,
  WA_LDLBH-LRATE, sy-vline,
  WA_LDLBH-LANTU, sy-vline,
  WA_LDLBH-TKZTI, sy-vline,
  WA_LDLBH-LBTXT, sy-vline,
  WA_LDLBH-RIDVN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LDLBH 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_LDLBH 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_LDLBH INTO WA_LDLBH.


*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 AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LDLBH-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LDLBH-AENNR.
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_LDLBH_STR, 
MANDT TYPE STRING,
LNID TYPE STRING,
LBVER TYPE STRING,
STATU TYPE STRING,
LD_PERST TYPE STRING,
LD_PERED TYPE STRING,
LRATE TYPE STRING,
LANTU TYPE STRING,
TKZTI TYPE STRING,
LBTXT TYPE STRING,
RIDVN TYPE STRING,
RIDBS TYPE STRING,
AENNR TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
LBAL_MAX TYPE STRING,
TKTAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LDLBH_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_LDLBH_STR-MANDT sy-vline 
WA_LDLBH_STR-LNID sy-vline 
WA_LDLBH_STR-LBVER sy-vline 
WA_LDLBH_STR-STATU sy-vline 
WA_LDLBH_STR-LD_PERST sy-vline 
WA_LDLBH_STR-LD_PERED sy-vline 
WA_LDLBH_STR-LRATE sy-vline 
WA_LDLBH_STR-LANTU sy-vline 
WA_LDLBH_STR-TKZTI sy-vline 
WA_LDLBH_STR-LBTXT sy-vline 
WA_LDLBH_STR-RIDVN sy-vline 
WA_LDLBH_STR-RIDBS sy-vline 
WA_LDLBH_STR-AENNR sy-vline 
WA_LDLBH_STR-ANDAT sy-vline 
WA_LDLBH_STR-ANNAM sy-vline 
WA_LDLBH_STR-AEDAT sy-vline 
WA_LDLBH_STR-AENAM sy-vline 
WA_LDLBH_STR-LBAL_MAX sy-vline 
WA_LDLBH_STR-TKTAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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