ABAP Select data from SAP table /PF1/I_ACLINK2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PF1/I_ACLINK2 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 /PF1/I_ACLINK2. 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 /PF1/I_ACLINK2 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_/PF1/I_ACLINK2 TYPE STANDARD TABLE OF /PF1/I_ACLINK2,
      WA_/PF1/I_ACLINK2 TYPE /PF1/I_ACLINK2,
      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: </PF1/I_ACLINK2> TYPE /PF1/I_ACLINK2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/PF1/I_ACLINK2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PF1/I_ACLINK2
  INTO TABLE IT_/PF1/I_ACLINK2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PF1/I_ACLINK2
*  INTO TABLE @DATA(IT_/PF1/I_ACLINK22).
*--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_/PF1/I_ACLINK2 INDEX 1 INTO DATA(WA_/PF1/I_ACLINK22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PF1/I_ACLINK2 ASSIGNING </PF1/I_ACLINK2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PF1/I_ACLINK2>-MANDT = 1.
</PF1/I_ACLINK2>-ACC_ID = 1.
</PF1/I_ACLINK2>-GUID = 1.
</PF1/I_ACLINK2>-REVISION = 1.
</PF1/I_ACLINK2>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_/PF1/I_ACLINK2 INTO WA_/PF1/I_ACLINK2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PF1/I_ACLINK2-HBKID, sy-vline,
  WA_/PF1/I_ACLINK2-HKTID, sy-vline,
  WA_/PF1/I_ACLINK2-VALID_FROM, sy-vline,
  WA_/PF1/I_ACLINK2-VALID_TO, sy-vline,
  WA_/PF1/I_ACLINK2-HERKU, sy-vline,
  WA_/PF1/I_ACLINK2-REMOTEACCOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PF1/I_ACLINK2 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_/PF1/I_ACLINK2 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_/PF1/I_ACLINK2 INTO WA_/PF1/I_ACLINK2.


*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 HERKU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PF1/I_ACLINK2-HERKU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PF1/I_ACLINK2-HERKU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FDGRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PF1/I_ACLINK2-FDGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PF1/I_ACLINK2-FDGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PF1/I_ACLINK2-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PF1/I_ACLINK2-HKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WEKON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PF1/I_ACLINK2-WEKON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PF1/I_ACLINK2-WEKON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WKKON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PF1/I_ACLINK2-WKKON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PF1/I_ACLINK2-WKKON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WIKON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PF1/I_ACLINK2-WIKON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PF1/I_ACLINK2-WIKON.
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_/PF1/I_ACLINK2_STR, 
MANDT TYPE STRING,
ACC_ID TYPE STRING,
GUID TYPE STRING,
REVISION TYPE STRING,
BUKRS TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
HERKU TYPE STRING,
REMOTEACCOUNT TYPE STRING,
BANKN TYPE STRING,
BKONT TYPE STRING,
REFZL TYPE STRING,
DTAAI TYPE STRING,
BNKN2 TYPE STRING,
IS_REUSED TYPE STRING,
FDGRP TYPE STRING,
ABWAE TYPE STRING,
HKONT TYPE STRING,
WEKON TYPE STRING,
MINDT TYPE STRING,
HBID1 TYPE STRING,
HKID1 TYPE STRING,
HBID2 TYPE STRING,
HKID2 TYPE STRING,
WKKON TYPE STRING,
WIKON TYPE STRING,
BANKS TYPE STRING,
BANKL TYPE STRING,
ACC_DESC TYPE STRING,
BENEFICIAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PF1/I_ACLINK2_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_/PF1/I_ACLINK2_STR-MANDT sy-vline 
WA_/PF1/I_ACLINK2_STR-ACC_ID sy-vline 
WA_/PF1/I_ACLINK2_STR-GUID sy-vline 
WA_/PF1/I_ACLINK2_STR-REVISION sy-vline 
WA_/PF1/I_ACLINK2_STR-BUKRS sy-vline 
WA_/PF1/I_ACLINK2_STR-HBKID sy-vline 
WA_/PF1/I_ACLINK2_STR-HKTID sy-vline 
WA_/PF1/I_ACLINK2_STR-VALID_FROM sy-vline 
WA_/PF1/I_ACLINK2_STR-VALID_TO sy-vline 
WA_/PF1/I_ACLINK2_STR-HERKU sy-vline 
WA_/PF1/I_ACLINK2_STR-REMOTEACCOUNT sy-vline 
WA_/PF1/I_ACLINK2_STR-BANKN sy-vline 
WA_/PF1/I_ACLINK2_STR-BKONT sy-vline 
WA_/PF1/I_ACLINK2_STR-REFZL sy-vline 
WA_/PF1/I_ACLINK2_STR-DTAAI sy-vline 
WA_/PF1/I_ACLINK2_STR-BNKN2 sy-vline 
WA_/PF1/I_ACLINK2_STR-IS_REUSED sy-vline 
WA_/PF1/I_ACLINK2_STR-FDGRP sy-vline 
WA_/PF1/I_ACLINK2_STR-ABWAE sy-vline 
WA_/PF1/I_ACLINK2_STR-HKONT sy-vline 
WA_/PF1/I_ACLINK2_STR-WEKON sy-vline 
WA_/PF1/I_ACLINK2_STR-MINDT sy-vline 
WA_/PF1/I_ACLINK2_STR-HBID1 sy-vline 
WA_/PF1/I_ACLINK2_STR-HKID1 sy-vline 
WA_/PF1/I_ACLINK2_STR-HBID2 sy-vline 
WA_/PF1/I_ACLINK2_STR-HKID2 sy-vline 
WA_/PF1/I_ACLINK2_STR-WKKON sy-vline 
WA_/PF1/I_ACLINK2_STR-WIKON sy-vline 
WA_/PF1/I_ACLINK2_STR-BANKS sy-vline 
WA_/PF1/I_ACLINK2_STR-BANKL sy-vline 
WA_/PF1/I_ACLINK2_STR-ACC_DESC sy-vline 
WA_/PF1/I_ACLINK2_STR-BENEFICIAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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