ABAP Select data from SAP table P08_LNICH2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_LNICH2 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_LNICH2. 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_LNICH2 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_LNICH2 TYPE STANDARD TABLE OF P08_LNICH2,
      WA_P08_LNICH2 TYPE P08_LNICH2,
      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_LNICH2> TYPE P08_LNICH2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_LNICH2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_LNICH2
  INTO TABLE IT_P08_LNICH2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_LNICH2
*  INTO TABLE @DATA(IT_P08_LNICH22).
*--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_LNICH2 INDEX 1 INTO DATA(WA_P08_LNICH22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_LNICH2 ASSIGNING <P08_LNICH2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_LNICH2>-NACHN = 1.
<P08_LNICH2>-VORNA = 1.
<P08_LNICH2>-BUKRS = 1.
<P08_LNICH2>-BUTXT = 1.
<P08_LNICH2>-WERKS = 1.

ENDLOOP.

LOOP AT IT_P08_LNICH2 INTO WA_P08_LNICH2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_LNICH2-NAME1, sy-vline,
  WA_P08_LNICH2-BTRTL, sy-vline,
  WA_P08_LNICH2-BTEXT, sy-vline,
  WA_P08_LNICH2-PERSG, sy-vline,
  WA_P08_LNICH2-PGTXT, sy-vline,
  WA_P08_LNICH2-PERSK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_LNICH2 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_LNICH2 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_LNICH2 INTO WA_P08_LNICH2.


*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_LNICH2-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P08_LNICH2-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_LNICH2_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,
DIRFB TYPE STRING,
NIPY_YTD TYPE STRING,
AMTTOLEL TYPE STRING,
AMTLELEET TYPE STRING,
AMTEETERT TYPE STRING,
AMTERTUEL TYPE STRING,
AMTFROMUEL TYPE STRING,
EENIC_YTD TYPE STRING,
ERNIC_YTD TYPE STRING,
EENIR_YTD TYPE STRING,
ERNIR_YTD TYPE STRING,
ADJUST TYPE STRING,
MPT TYPE STRING,
AMTERTUAP TYPE STRING,
AMTFROMUST TYPE STRING,
AMTFROAUST TYPE STRING,
PAYDT TYPE STRING,
CONI_YTD TYPE STRING,
FPPER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_LNICH2_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_LNICH2_STR-NACHN sy-vline 
WA_P08_LNICH2_STR-VORNA sy-vline 
WA_P08_LNICH2_STR-BUKRS sy-vline 
WA_P08_LNICH2_STR-BUTXT sy-vline 
WA_P08_LNICH2_STR-WERKS sy-vline 
WA_P08_LNICH2_STR-NAME1 sy-vline 
WA_P08_LNICH2_STR-BTRTL sy-vline 
WA_P08_LNICH2_STR-BTEXT sy-vline 
WA_P08_LNICH2_STR-PERSG sy-vline 
WA_P08_LNICH2_STR-PGTXT sy-vline 
WA_P08_LNICH2_STR-PERSK sy-vline 
WA_P08_LNICH2_STR-PKTXT sy-vline 
WA_P08_LNICH2_STR-ORGEH sy-vline 
WA_P08_LNICH2_STR-ORGTX sy-vline 
WA_P08_LNICH2_STR-KOSTL sy-vline 
WA_P08_LNICH2_STR-KOSTT sy-vline 
WA_P08_LNICH2_STR-ABKRS sy-vline 
WA_P08_LNICH2_STR-ABKTX sy-vline 
WA_P08_LNICH2_STR-PERNR sy-vline 
WA_P08_LNICH2_STR-NICAT sy-vline 
WA_P08_LNICH2_STR-CTOUT sy-vline 
WA_P08_LNICH2_STR-DIRFB sy-vline 
WA_P08_LNICH2_STR-NIPY_YTD sy-vline 
WA_P08_LNICH2_STR-AMTTOLEL sy-vline 
WA_P08_LNICH2_STR-AMTLELEET sy-vline 
WA_P08_LNICH2_STR-AMTEETERT sy-vline 
WA_P08_LNICH2_STR-AMTERTUEL sy-vline 
WA_P08_LNICH2_STR-AMTFROMUEL sy-vline 
WA_P08_LNICH2_STR-EENIC_YTD sy-vline 
WA_P08_LNICH2_STR-ERNIC_YTD sy-vline 
WA_P08_LNICH2_STR-EENIR_YTD sy-vline 
WA_P08_LNICH2_STR-ERNIR_YTD sy-vline 
WA_P08_LNICH2_STR-ADJUST sy-vline 
WA_P08_LNICH2_STR-MPT sy-vline 
WA_P08_LNICH2_STR-AMTERTUAP sy-vline 
WA_P08_LNICH2_STR-AMTFROMUST sy-vline 
WA_P08_LNICH2_STR-AMTFROAUST sy-vline 
WA_P08_LNICH2_STR-PAYDT sy-vline 
WA_P08_LNICH2_STR-CONI_YTD sy-vline 
WA_P08_LNICH2_STR-FPPER sy-vline      INTO ld_text SEPARATED BY SPACE.

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