ABAP Select data from SAP table LDLBTD into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LDLBTD 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 LDLBTD. 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 LDLBTD 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_LDLBTD TYPE STANDARD TABLE OF LDLBTD,
      WA_LDLBTD TYPE LDLBTD,
      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: <LDLBTD> TYPE LDLBTD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LDLBTD
*  INTO TABLE @DATA(IT_LDLBTD2).
*--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_LDLBTD INDEX 1 INTO DATA(WA_LDLBTD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LDLBTD>-MANDT = 1.
<LDLBTD>-LNID = 1.
<LDLBTD>-ZAEHL = 1.
<LDLBTD>-POSID = 1.
<LDLBTD>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LDLBTD-WERKS, sy-vline,
  WA_LDLBTD-TLINE, sy-vline,
  WA_LDLBTD-SLNSID, sy-vline,
  WA_LDLBTD-STAKT, sy-vline,
  WA_LDLBTD-ELNSID, sy-vline,
  WA_LDLBTD-ETAKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LDLBTD 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_LDLBTD 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_LDLBTD INTO WA_LDLBTD.


*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_LDLBTD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LDLBTD-MATNR.
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_LDLBTD_STR, 
MANDT TYPE STRING,
LNID TYPE STRING,
ZAEHL TYPE STRING,
POSID TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
TLINE TYPE STRING,
SLNSID TYPE STRING,
STAKT TYPE STRING,
ELNSID TYPE STRING,
ETAKT TYPE STRING,
POSNR TYPE STRING,
SLINE_SEG TYPE STRING,
SWERKS TYPE STRING,
SLTAKT TYPE STRING,
ELINE_SEG TYPE STRING,
EWERKS TYPE STRING,
ELTAKT TYPE STRING,
MAKTX TYPE STRING,
SELKZ TYPE STRING,
EXIST TYPE STRING,
VBKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LDLBTD_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_LDLBTD_STR-MANDT sy-vline 
WA_LDLBTD_STR-LNID sy-vline 
WA_LDLBTD_STR-ZAEHL sy-vline 
WA_LDLBTD_STR-POSID sy-vline 
WA_LDLBTD_STR-MATNR sy-vline 
WA_LDLBTD_STR-WERKS sy-vline 
WA_LDLBTD_STR-TLINE sy-vline 
WA_LDLBTD_STR-SLNSID sy-vline 
WA_LDLBTD_STR-STAKT sy-vline 
WA_LDLBTD_STR-ELNSID sy-vline 
WA_LDLBTD_STR-ETAKT sy-vline 
WA_LDLBTD_STR-POSNR sy-vline 
WA_LDLBTD_STR-SLINE_SEG sy-vline 
WA_LDLBTD_STR-SWERKS sy-vline 
WA_LDLBTD_STR-SLTAKT sy-vline 
WA_LDLBTD_STR-ELINE_SEG sy-vline 
WA_LDLBTD_STR-EWERKS sy-vline 
WA_LDLBTD_STR-ELTAKT sy-vline 
WA_LDLBTD_STR-MAKTX sy-vline 
WA_LDLBTD_STR-SELKZ sy-vline 
WA_LDLBTD_STR-EXIST sy-vline 
WA_LDLBTD_STR-VBKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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