ABAP Select data from SAP table P08_LNICH1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_LNICH1 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_LNICH1. 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_LNICH1 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_LNICH1 TYPE STANDARD TABLE OF P08_LNICH1,
      WA_P08_LNICH1 TYPE P08_LNICH1,
      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_LNICH1> TYPE P08_LNICH1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_LNICH1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_LNICH1
  INTO TABLE IT_P08_LNICH1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_LNICH1
*  INTO TABLE @DATA(IT_P08_LNICH12).
*--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_LNICH1 INDEX 1 INTO DATA(WA_P08_LNICH12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_LNICH1 ASSIGNING <P08_LNICH1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_LNICH1>-NACHN = 1.
<P08_LNICH1>-VORNA = 1.
<P08_LNICH1>-BUKRS = 1.
<P08_LNICH1>-BUTXT = 1.
<P08_LNICH1>-WERKS = 1.

ENDLOOP.

LOOP AT IT_P08_LNICH1 INTO WA_P08_LNICH1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_LNICH1-NAME1, sy-vline,
  WA_P08_LNICH1-BTRTL, sy-vline,
  WA_P08_LNICH1-BTEXT, sy-vline,
  WA_P08_LNICH1-PERSG, sy-vline,
  WA_P08_LNICH1-PGTXT, sy-vline,
  WA_P08_LNICH1-PERSK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_LNICH1 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_LNICH1 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_LNICH1 INTO WA_P08_LNICH1.


*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_LNICH1-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P08_LNICH1-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_LNICH1_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,
NICAT TYPE STRING,
CTOUT TYPE STRING,
ASSGM TYPE STRING,
PRRTY TYPE STRING,
APPS TYPE STRING,
DIRFB TYPE STRING,
DIRRP TYPE STRING,
DIRPW TYPE STRING,
LSFLG TYPE STRING,
LTLVR TYPE STRING,
WK6FL TYPE STRING,
NIPAY TYPE STRING,
NIBASE TYPE STRING,
AMTTOLEL TYPE STRING,
AMTLELEET TYPE STRING,
AMTEETERT TYPE STRING,
AMTERTUEL TYPE STRING,
AMTFROMUEL TYPE STRING,
EENIC TYPE STRING,
ERNIC TYPE STRING,
EENIR TYPE STRING,
ERNIR TYPE STRING,
ADJUST TYPE STRING,
MPT TYPE STRING,
AMTERTUAP TYPE STRING,
TA_PERNR TYPE STRING,
ORG_NICAT TYPE STRING,
AMTFROMUST TYPE STRING,
AMTFROAUST TYPE STRING,
PAYDT TYPE STRING,
CONIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_LNICH1_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_LNICH1_STR-NACHN sy-vline 
WA_P08_LNICH1_STR-VORNA sy-vline 
WA_P08_LNICH1_STR-BUKRS sy-vline 
WA_P08_LNICH1_STR-BUTXT sy-vline 
WA_P08_LNICH1_STR-WERKS sy-vline 
WA_P08_LNICH1_STR-NAME1 sy-vline 
WA_P08_LNICH1_STR-BTRTL sy-vline 
WA_P08_LNICH1_STR-BTEXT sy-vline 
WA_P08_LNICH1_STR-PERSG sy-vline 
WA_P08_LNICH1_STR-PGTXT sy-vline 
WA_P08_LNICH1_STR-PERSK sy-vline 
WA_P08_LNICH1_STR-PKTXT sy-vline 
WA_P08_LNICH1_STR-ORGEH sy-vline 
WA_P08_LNICH1_STR-ORGTX sy-vline 
WA_P08_LNICH1_STR-KOSTL sy-vline 
WA_P08_LNICH1_STR-KOSTT sy-vline 
WA_P08_LNICH1_STR-ABKRS sy-vline 
WA_P08_LNICH1_STR-ABKTX sy-vline 
WA_P08_LNICH1_STR-PERNR sy-vline 
WA_P08_LNICH1_STR-NICAT sy-vline 
WA_P08_LNICH1_STR-CTOUT sy-vline 
WA_P08_LNICH1_STR-ASSGM sy-vline 
WA_P08_LNICH1_STR-PRRTY sy-vline 
WA_P08_LNICH1_STR-APPS sy-vline 
WA_P08_LNICH1_STR-DIRFB sy-vline 
WA_P08_LNICH1_STR-DIRRP sy-vline 
WA_P08_LNICH1_STR-DIRPW sy-vline 
WA_P08_LNICH1_STR-LSFLG sy-vline 
WA_P08_LNICH1_STR-LTLVR sy-vline 
WA_P08_LNICH1_STR-WK6FL sy-vline 
WA_P08_LNICH1_STR-NIPAY sy-vline 
WA_P08_LNICH1_STR-NIBASE sy-vline 
WA_P08_LNICH1_STR-AMTTOLEL sy-vline 
WA_P08_LNICH1_STR-AMTLELEET sy-vline 
WA_P08_LNICH1_STR-AMTEETERT sy-vline 
WA_P08_LNICH1_STR-AMTERTUEL sy-vline 
WA_P08_LNICH1_STR-AMTFROMUEL sy-vline 
WA_P08_LNICH1_STR-EENIC sy-vline 
WA_P08_LNICH1_STR-ERNIC sy-vline 
WA_P08_LNICH1_STR-EENIR sy-vline 
WA_P08_LNICH1_STR-ERNIR sy-vline 
WA_P08_LNICH1_STR-ADJUST sy-vline 
WA_P08_LNICH1_STR-MPT sy-vline 
WA_P08_LNICH1_STR-AMTERTUAP sy-vline 
WA_P08_LNICH1_STR-TA_PERNR sy-vline 
WA_P08_LNICH1_STR-ORG_NICAT sy-vline 
WA_P08_LNICH1_STR-AMTFROMUST sy-vline 
WA_P08_LNICH1_STR-AMTFROAUST sy-vline 
WA_P08_LNICH1_STR-PAYDT sy-vline 
WA_P08_LNICH1_STR-CONIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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