ABAP Select data from SAP table P08_LNICHD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_LNICHD 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 P08_LNICHD. 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 P08_LNICHD 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_P08_LNICHD TYPE STANDARD TABLE OF P08_LNICHD,
      WA_P08_LNICHD TYPE P08_LNICHD,
      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: <P08_LNICHD> TYPE P08_LNICHD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_LNICHD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_LNICHD
  INTO TABLE IT_P08_LNICHD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_LNICHD
*  INTO TABLE @DATA(IT_P08_LNICHD2).
*--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_P08_LNICHD INDEX 1 INTO DATA(WA_P08_LNICHD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_LNICHD ASSIGNING <P08_LNICHD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_LNICHD>-NACHN = 1.
<P08_LNICHD>-VORNA = 1.
<P08_LNICHD>-BUKRS = 1.
<P08_LNICHD>-BUTXT = 1.
<P08_LNICHD>-WERKS = 1.

ENDLOOP.

LOOP AT IT_P08_LNICHD INTO WA_P08_LNICHD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_LNICHD-NAME1, sy-vline,
  WA_P08_LNICHD-BTRTL, sy-vline,
  WA_P08_LNICHD-BTEXT, sy-vline,
  WA_P08_LNICHD-PERSG, sy-vline,
  WA_P08_LNICHD-PGTXT, sy-vline,
  WA_P08_LNICHD-PERSK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_LNICHD 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_P08_LNICHD 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_P08_LNICHD INTO WA_P08_LNICHD.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P08_LNICHD-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P08_LNICHD-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_P08_LNICHD_STR, 
NACHN TYPE STRING,
VORNA TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
WERKS TYPE STRING,
NAME1 TYPE STRING,
BTRTL TYPE STRING,
BTEXT TYPE STRING,
PERSG TYPE STRING,
PGTXT TYPE STRING,
PERSK TYPE STRING,
PKTXT TYPE STRING,
ORGEH TYPE STRING,
ORGTX TYPE STRING,
KOSTL TYPE STRING,
KOSTT TYPE STRING,
ABKRS TYPE STRING,
ABKTX TYPE STRING,
PERNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_LNICHD_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_P08_LNICHD_STR-NACHN sy-vline 
WA_P08_LNICHD_STR-VORNA sy-vline 
WA_P08_LNICHD_STR-BUKRS sy-vline 
WA_P08_LNICHD_STR-BUTXT sy-vline 
WA_P08_LNICHD_STR-WERKS sy-vline 
WA_P08_LNICHD_STR-NAME1 sy-vline 
WA_P08_LNICHD_STR-BTRTL sy-vline 
WA_P08_LNICHD_STR-BTEXT sy-vline 
WA_P08_LNICHD_STR-PERSG sy-vline 
WA_P08_LNICHD_STR-PGTXT sy-vline 
WA_P08_LNICHD_STR-PERSK sy-vline 
WA_P08_LNICHD_STR-PKTXT sy-vline 
WA_P08_LNICHD_STR-ORGEH sy-vline 
WA_P08_LNICHD_STR-ORGTX sy-vline 
WA_P08_LNICHD_STR-KOSTL sy-vline 
WA_P08_LNICHD_STR-KOSTT sy-vline 
WA_P08_LNICHD_STR-ABKRS sy-vline 
WA_P08_LNICHD_STR-ABKTX sy-vline 
WA_P08_LNICHD_STR-PERNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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