ABAP Select data from SAP table CPPMGBRTRLINK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPPMGBRTRLINK
*  INTO TABLE @DATA(IT_CPPMGBRTRLINK2).
*--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_CPPMGBRTRLINK INDEX 1 INTO DATA(WA_CPPMGBRTRLINK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPPMGBRTRLINK>-MANDT = 1.
<CPPMGBRTRLINK>-DOCNUMBER = 1.
<CPPMGBRTRLINK>-DOCUMENTITEMNUMBER = 1.
<CPPMGBRTRLINK>-PREPAYMENTAGRMTREFBUSOBJECT = 1.
<CPPMGBRTRLINK>-SDDOCUMENTCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPPMGBRTRLINK-DOCUMENTTYPE, sy-vline,
  WA_CPPMGBRTRLINK-COUNTERPARTY, sy-vline,
  WA_CPPMGBRTRLINK-COMPANYCODE, sy-vline,
  WA_CPPMGBRTRLINK-TRDGCONTRAPPLICATIONSTATUS, sy-vline,
  WA_CPPMGBRTRLINK-MATERIAL, sy-vline,
  WA_CPPMGBRTRLINK-COMMODITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPPMGBRTRLINK 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_CPPMGBRTRLINK 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_CPPMGBRTRLINK INTO WA_CPPMGBRTRLINK.


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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CPPMGBRTRLINK-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPPMGBRTRLINK-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ORDERQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CPPMGBRTRLINK-ORDERQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPPMGBRTRLINK-ORDERQUANTITYUNIT.
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_CPPMGBRTRLINK_STR, 
MANDT TYPE STRING,
DOCNUMBER TYPE STRING,
DOCUMENTITEMNUMBER TYPE STRING,
PREPAYMENTAGRMTREFBUSOBJECT TYPE STRING,
SDDOCUMENTCATEGORY TYPE STRING,
DOCUMENTTYPE TYPE STRING,
COUNTERPARTY TYPE STRING,
COMPANYCODE TYPE STRING,
TRDGCONTRAPPLICATIONSTATUS TYPE STRING,
MATERIAL TYPE STRING,
COMMODITY TYPE STRING,
ORDERQUANTITY TYPE STRING,
ORDERQUANTITYUNIT TYPE STRING,
PREPAYMENTTOTALAMT TYPE STRING,
PREPAYMENTTOTALAMTCRCY TYPE STRING,
PREPAYMENTUNASSIGNEDAMT TYPE STRING,
PREPAYMENTUNASSIGNEDAMTCRCY TYPE STRING,
PREPAYMENTAGREEMENT TYPE STRING,
PREPAYMENTDOCUMENTITEMNUMBER TYPE STRING,
EXCHANGERATETYPE TYPE STRING,
EXCHANGERATEDATE TYPE STRING,
EXCHANGERATE TYPE STRING,
ALTERNATIVEEXCHANGERATETYPE TYPE STRING,
CRITICALITY TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPPMGBRTRLINK_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_CPPMGBRTRLINK_STR-MANDT sy-vline 
WA_CPPMGBRTRLINK_STR-DOCNUMBER sy-vline 
WA_CPPMGBRTRLINK_STR-DOCUMENTITEMNUMBER sy-vline 
WA_CPPMGBRTRLINK_STR-PREPAYMENTAGRMTREFBUSOBJECT sy-vline 
WA_CPPMGBRTRLINK_STR-SDDOCUMENTCATEGORY sy-vline 
WA_CPPMGBRTRLINK_STR-DOCUMENTTYPE sy-vline 
WA_CPPMGBRTRLINK_STR-COUNTERPARTY sy-vline 
WA_CPPMGBRTRLINK_STR-COMPANYCODE sy-vline 
WA_CPPMGBRTRLINK_STR-TRDGCONTRAPPLICATIONSTATUS sy-vline 
WA_CPPMGBRTRLINK_STR-MATERIAL sy-vline 
WA_CPPMGBRTRLINK_STR-COMMODITY sy-vline 
WA_CPPMGBRTRLINK_STR-ORDERQUANTITY sy-vline 
WA_CPPMGBRTRLINK_STR-ORDERQUANTITYUNIT sy-vline 
WA_CPPMGBRTRLINK_STR-PREPAYMENTTOTALAMT sy-vline 
WA_CPPMGBRTRLINK_STR-PREPAYMENTTOTALAMTCRCY sy-vline 
WA_CPPMGBRTRLINK_STR-PREPAYMENTUNASSIGNEDAMT sy-vline 
WA_CPPMGBRTRLINK_STR-PREPAYMENTUNASSIGNEDAMTCRCY sy-vline 
WA_CPPMGBRTRLINK_STR-PREPAYMENTAGREEMENT sy-vline 
WA_CPPMGBRTRLINK_STR-PREPAYMENTDOCUMENTITEMNUMBER sy-vline 
WA_CPPMGBRTRLINK_STR-EXCHANGERATETYPE sy-vline 
WA_CPPMGBRTRLINK_STR-EXCHANGERATEDATE sy-vline 
WA_CPPMGBRTRLINK_STR-EXCHANGERATE sy-vline 
WA_CPPMGBRTRLINK_STR-ALTERNATIVEEXCHANGERATETYPE sy-vline 
WA_CPPMGBRTRLINK_STR-CRITICALITY sy-vline 
WA_CPPMGBRTRLINK_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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