ABAP Select data from SAP table P08_LNICH0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_LNICH0 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_LNICH0. 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_LNICH0 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_LNICH0 TYPE STANDARD TABLE OF P08_LNICH0,
      WA_P08_LNICH0 TYPE P08_LNICH0,
      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_LNICH0> TYPE P08_LNICH0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_LNICH0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_LNICH0
  INTO TABLE IT_P08_LNICH0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_LNICH0
*  INTO TABLE @DATA(IT_P08_LNICH02).
*--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_LNICH0 INDEX 1 INTO DATA(WA_P08_LNICH02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_LNICH0 ASSIGNING <P08_LNICH0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_LNICH0>-NACHN = 1.
<P08_LNICH0>-VORNA = 1.
<P08_LNICH0>-BUKRS = 1.
<P08_LNICH0>-BUTXT = 1.
<P08_LNICH0>-WERKS = 1.

ENDLOOP.

LOOP AT IT_P08_LNICH0 INTO WA_P08_LNICH0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_LNICH0-NAME1, sy-vline,
  WA_P08_LNICH0-BTRTL, sy-vline,
  WA_P08_LNICH0-BTEXT, sy-vline,
  WA_P08_LNICH0-PERSG, sy-vline,
  WA_P08_LNICH0-PGTXT, sy-vline,
  WA_P08_LNICH0-PERSK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_LNICH0 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_LNICH0 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_LNICH0 INTO WA_P08_LNICH0.


*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_LNICH0-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P08_LNICH0-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_LNICH0_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,
FPPER TYPE STRING,
FPERM TYPE STRING,
ASSGM TYPE STRING,
NIPER TYPE STRING,
NI_PERM TYPE STRING,
LSFLG TYPE STRING,
LTLVR TYPE STRING,
NIPAY TYPE STRING,
NIPY_CFWDP TYPE STRING,
NIPY_CFWDC TYPE STRING,
NIPY_BFWD TYPE STRING,
NIPY_TPO TYPE STRING,
NIPY_REG TYPE STRING,
NIPY_RCFP TYPE STRING,
NIPY_RCFC TYPE STRING,
NIPY_RBF TYPE STRING,
NIPY_RTPO TYPE STRING,
NIPY_IRREG TYPE STRING,
NIPY_ICFP TYPE STRING,
NIPY_ICFC TYPE STRING,
NIPY_IBF TYPE STRING,
NIPY_ITPO TYPE STRING,
REF_PERNR TYPE STRING,
MAINC TYPE STRING,
NIPE TYPE STRING,
MPT TYPE STRING,
TA_PERNR TYPE STRING,
ALEXC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_LNICH0_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_LNICH0_STR-NACHN sy-vline 
WA_P08_LNICH0_STR-VORNA sy-vline 
WA_P08_LNICH0_STR-BUKRS sy-vline 
WA_P08_LNICH0_STR-BUTXT sy-vline 
WA_P08_LNICH0_STR-WERKS sy-vline 
WA_P08_LNICH0_STR-NAME1 sy-vline 
WA_P08_LNICH0_STR-BTRTL sy-vline 
WA_P08_LNICH0_STR-BTEXT sy-vline 
WA_P08_LNICH0_STR-PERSG sy-vline 
WA_P08_LNICH0_STR-PGTXT sy-vline 
WA_P08_LNICH0_STR-PERSK sy-vline 
WA_P08_LNICH0_STR-PKTXT sy-vline 
WA_P08_LNICH0_STR-ORGEH sy-vline 
WA_P08_LNICH0_STR-ORGTX sy-vline 
WA_P08_LNICH0_STR-KOSTL sy-vline 
WA_P08_LNICH0_STR-KOSTT sy-vline 
WA_P08_LNICH0_STR-ABKRS sy-vline 
WA_P08_LNICH0_STR-ABKTX sy-vline 
WA_P08_LNICH0_STR-PERNR sy-vline 
WA_P08_LNICH0_STR-FPPER sy-vline 
WA_P08_LNICH0_STR-FPERM sy-vline 
WA_P08_LNICH0_STR-ASSGM sy-vline 
WA_P08_LNICH0_STR-NIPER sy-vline 
WA_P08_LNICH0_STR-NI_PERM sy-vline 
WA_P08_LNICH0_STR-LSFLG sy-vline 
WA_P08_LNICH0_STR-LTLVR sy-vline 
WA_P08_LNICH0_STR-NIPAY sy-vline 
WA_P08_LNICH0_STR-NIPY_CFWDP sy-vline 
WA_P08_LNICH0_STR-NIPY_CFWDC sy-vline 
WA_P08_LNICH0_STR-NIPY_BFWD sy-vline 
WA_P08_LNICH0_STR-NIPY_TPO sy-vline 
WA_P08_LNICH0_STR-NIPY_REG sy-vline 
WA_P08_LNICH0_STR-NIPY_RCFP sy-vline 
WA_P08_LNICH0_STR-NIPY_RCFC sy-vline 
WA_P08_LNICH0_STR-NIPY_RBF sy-vline 
WA_P08_LNICH0_STR-NIPY_RTPO sy-vline 
WA_P08_LNICH0_STR-NIPY_IRREG sy-vline 
WA_P08_LNICH0_STR-NIPY_ICFP sy-vline 
WA_P08_LNICH0_STR-NIPY_ICFC sy-vline 
WA_P08_LNICH0_STR-NIPY_IBF sy-vline 
WA_P08_LNICH0_STR-NIPY_ITPO sy-vline 
WA_P08_LNICH0_STR-REF_PERNR sy-vline 
WA_P08_LNICH0_STR-MAINC sy-vline 
WA_P08_LNICH0_STR-NIPE sy-vline 
WA_P08_LNICH0_STR-MPT sy-vline 
WA_P08_LNICH0_STR-TA_PERNR sy-vline 
WA_P08_LNICH0_STR-ALEXC sy-vline      INTO ld_text SEPARATED BY SPACE.

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