ABAP Select data from SAP table RECP_OI_DOC_CN_DETAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECP_OI_DOC_CN_DETAIL
*  INTO TABLE @DATA(IT_RECP_OI_DOC_CN_DETAIL2).
*--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_RECP_OI_DOC_CN_DETAIL INDEX 1 INTO DATA(WA_RECP_OI_DOC_CN_DETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECP_OI_DOC_CN_DETAIL>-BUKRS = 1.
<RECP_OI_DOC_CN_DETAIL>-RECNNR = 1.
<RECP_OI_DOC_CN_DETAIL>-RECNTYPE = 1.
<RECP_OI_DOC_CN_DETAIL>-RECNDAT = 1.
<RECP_OI_DOC_CN_DETAIL>-RECNBEG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECP_OI_DOC_CN_DETAIL-RECNDPO, sy-vline,
  WA_RECP_OI_DOC_CN_DETAIL-RECNEND1ST, sy-vline,
  WA_RECP_OI_DOC_CN_DETAIL-RECNENDABS, sy-vline,
  WA_RECP_OI_DOC_CN_DETAIL-RECNTXT, sy-vline,
  WA_RECP_OI_DOC_CN_DETAIL-RECNTLAW, sy-vline,
  WA_RECP_OI_DOC_CN_DETAIL-RECNTXTOLD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECP_OI_DOC_CN_DETAIL 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_RECP_OI_DOC_CN_DETAIL 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_RECP_OI_DOC_CN_DETAIL INTO WA_RECP_OI_DOC_CN_DETAIL.


*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 RECNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECP_OI_DOC_CN_DETAIL-RECNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_OI_DOC_CN_DETAIL-RECNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field RECNENDABS
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECP_OI_DOC_CN_DETAIL-RECNENDABS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_OI_DOC_CN_DETAIL-RECNENDABS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNTXTOLD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECP_OI_DOC_CN_DETAIL-RECNTXTOLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_OI_DOC_CN_DETAIL-RECNTXTOLD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNNRCOLLECT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECP_OI_DOC_CN_DETAIL-RECNNRCOLLECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_OI_DOC_CN_DETAIL-RECNNRCOLLECT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECP_OI_DOC_CN_DETAIL-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_OI_DOC_CN_DETAIL-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECP_OI_DOC_CN_DETAIL-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_OI_DOC_CN_DETAIL-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECP_OI_DOC_CN_DETAIL-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECP_OI_DOC_CN_DETAIL-AUFNR.
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_RECP_OI_DOC_CN_DETAIL_STR, 
BUKRS TYPE STRING,
RECNNR TYPE STRING,
RECNTYPE TYPE STRING,
RECNDAT TYPE STRING,
RECNBEG TYPE STRING,
RECNDPO TYPE STRING,
RECNEND1ST TYPE STRING,
RECNENDABS TYPE STRING,
RECNTXT TYPE STRING,
RECNTLAW TYPE STRING,
RECNTXTOLD TYPE STRING,
RECNBUKRSCOLLECT TYPE STRING,
RECNNRCOLLECT TYPE STRING,
RECNCNCURR TYPE STRING,
RECNDACTIV TYPE STRING,
RECNNOTPER TYPE STRING,
RECNNOTRECEIPT TYPE STRING,
RECNNOTREASON TYPE STRING,
RECNDAKTKU TYPE STRING,
RECN2DAT TYPE STRING,
XRECNNRCOL TYPE STRING,
XRECNTYPE TYPE STRING,
GSBER TYPE STRING,
PRCTR TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
XTENANCYLAW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECP_OI_DOC_CN_DETAIL_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_RECP_OI_DOC_CN_DETAIL_STR-BUKRS sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNNR sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNTYPE sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNDAT sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNBEG sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNDPO sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNEND1ST sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNENDABS sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNTXT sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNTLAW sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNTXTOLD sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNBUKRSCOLLECT sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNNRCOLLECT sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNCNCURR sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNDACTIV sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNNOTPER sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNNOTRECEIPT sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNNOTREASON sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECNDAKTKU sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-RECN2DAT sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-XRECNNRCOL sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-XRECNTYPE sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-GSBER sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-PRCTR sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-KOSTL sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-AUFNR sy-vline 
WA_RECP_OI_DOC_CN_DETAIL_STR-XTENANCYLAW sy-vline      INTO ld_text SEPARATED BY SPACE.

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