ABAP Select data from SAP table P08_LNICH3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08_LNICH3 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_LNICH3. 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_LNICH3 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_LNICH3 TYPE STANDARD TABLE OF P08_LNICH3,
      WA_P08_LNICH3 TYPE P08_LNICH3,
      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_LNICH3> TYPE P08_LNICH3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08_LNICH3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08_LNICH3
  INTO TABLE IT_P08_LNICH3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08_LNICH3
*  INTO TABLE @DATA(IT_P08_LNICH32).
*--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_LNICH3 INDEX 1 INTO DATA(WA_P08_LNICH32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08_LNICH3 ASSIGNING <P08_LNICH3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08_LNICH3>-NACHN = 1.
<P08_LNICH3>-VORNA = 1.
<P08_LNICH3>-BUKRS = 1.
<P08_LNICH3>-BUTXT = 1.
<P08_LNICH3>-WERKS = 1.

ENDLOOP.

LOOP AT IT_P08_LNICH3 INTO WA_P08_LNICH3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08_LNICH3-NAME1, sy-vline,
  WA_P08_LNICH3-BTRTL, sy-vline,
  WA_P08_LNICH3-BTEXT, sy-vline,
  WA_P08_LNICH3-PERSG, sy-vline,
  WA_P08_LNICH3-PGTXT, sy-vline,
  WA_P08_LNICH3-PERSK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08_LNICH3 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_LNICH3 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_LNICH3 INTO WA_P08_LNICH3.


*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_LNICH3-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P08_LNICH3-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_LNICH3_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,
ATYPE TYPE STRING,
AMTPD_OP TYPE STRING,
AMTSPD_OP TYPE STRING,
AR_RELOP TYPE STRING,
TOTAR TYPE STRING,
ARRS_PRP TYPE STRING,
AR_TOPAY TYPE STRING,
ARRS_PRY TYPE STRING,
MPT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08_LNICH3_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_LNICH3_STR-NACHN sy-vline 
WA_P08_LNICH3_STR-VORNA sy-vline 
WA_P08_LNICH3_STR-BUKRS sy-vline 
WA_P08_LNICH3_STR-BUTXT sy-vline 
WA_P08_LNICH3_STR-WERKS sy-vline 
WA_P08_LNICH3_STR-NAME1 sy-vline 
WA_P08_LNICH3_STR-BTRTL sy-vline 
WA_P08_LNICH3_STR-BTEXT sy-vline 
WA_P08_LNICH3_STR-PERSG sy-vline 
WA_P08_LNICH3_STR-PGTXT sy-vline 
WA_P08_LNICH3_STR-PERSK sy-vline 
WA_P08_LNICH3_STR-PKTXT sy-vline 
WA_P08_LNICH3_STR-ORGEH sy-vline 
WA_P08_LNICH3_STR-ORGTX sy-vline 
WA_P08_LNICH3_STR-KOSTL sy-vline 
WA_P08_LNICH3_STR-KOSTT sy-vline 
WA_P08_LNICH3_STR-ABKRS sy-vline 
WA_P08_LNICH3_STR-ABKTX sy-vline 
WA_P08_LNICH3_STR-PERNR sy-vline 
WA_P08_LNICH3_STR-ATYPE sy-vline 
WA_P08_LNICH3_STR-AMTPD_OP sy-vline 
WA_P08_LNICH3_STR-AMTSPD_OP sy-vline 
WA_P08_LNICH3_STR-AR_RELOP sy-vline 
WA_P08_LNICH3_STR-TOTAR sy-vline 
WA_P08_LNICH3_STR-ARRS_PRP sy-vline 
WA_P08_LNICH3_STR-AR_TOPAY sy-vline 
WA_P08_LNICH3_STR-ARRS_PRY sy-vline 
WA_P08_LNICH3_STR-MPT sy-vline      INTO ld_text SEPARATED BY SPACE.

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