ABAP Select data from SAP table /ACCGO/S_PRC_APPL_ASSGMT_LINK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ACCGO/S_PRC_APPL_ASSGMT_LINK
*  INTO TABLE @DATA(IT_/ACCGO/S_PRC_APPL_ASSGMT_LINK2).
*--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_/ACCGO/S_PRC_APPL_ASSGMT_LINK INDEX 1 INTO DATA(WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ACCGO/S_PRC_APPL_ASSGMT_LINK>-CLIENT = 1.
</ACCGO/S_PRC_APPL_ASSGMT_LINK>-TYPE_FROM = 1.
</ACCGO/S_PRC_APPL_ASSGMT_LINK>-DOCUMENT_FROM = 1.
</ACCGO/S_PRC_APPL_ASSGMT_LINK>-ITEM_FROM = 1.
</ACCGO/S_PRC_APPL_ASSGMT_LINK>-SIDE_FROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-SUB_ITEM_FROM, sy-vline,
  WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-TKONN, sy-vline,
  WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-TPOSN, sy-vline,
  WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-SIDE_TO, sy-vline,
  WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-TPOSN_COM, sy-vline,
  WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-ASSGD_QUAN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK 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_/ACCGO/S_PRC_APPL_ASSGMT_LINK 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_/ACCGO/S_PRC_APPL_ASSGMT_LINK INTO WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK.


*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 TKONN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-TKONN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ASSGD_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-ASSGD_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-ASSGD_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UIS_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-UIS_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK-UIS_ID.
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_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR, 
CLIENT TYPE STRING,
TYPE_FROM TYPE STRING,
DOCUMENT_FROM TYPE STRING,
ITEM_FROM TYPE STRING,
SIDE_FROM TYPE STRING,
SUB_ITEM_FROM TYPE STRING,
TKONN TYPE STRING,
TPOSN TYPE STRING,
SIDE_TO TYPE STRING,
TPOSN_COM TYPE STRING,
ASSGD_QUAN TYPE STRING,
ASSGD_QUAN_ORIG TYPE STRING,
ASSGD_UOM TYPE STRING,
A_GUID TYPE STRING,
PRED_A_GUID TYPE STRING,
PRED_QUAN TYPE STRING,
FROZEN TYPE STRING,
CR_NAME TYPE STRING,
CR_DATE TYPE STRING,
CR_TIME TYPE STRING,
CH_NAME TYPE STRING,
CH_DATE TYPE STRING,
CH_TIME TYPE STRING,
CANCEL_FLAG TYPE STRING,
_DATAAGING TYPE STRING,
PLACE_HOLDER TYPE STRING,
UPDKZ TYPE STRING,
APPL_GUID TYPE STRING,
APPL_VERSION TYPE STRING,
UIS_ID TYPE STRING,
UIS_GUID TYPE STRING,
UIS_TYPE TYPE STRING,
UIS_GROUP_ID TYPE STRING,
CONTRACT_INSTR TYPE STRING,
UIS_ITEM TYPE STRING,
APPLY_DATE TYPE STRING,
LDC_EVENT_DATE TYPE STRING,
BOL_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_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_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CLIENT sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-TYPE_FROM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-DOCUMENT_FROM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-ITEM_FROM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-SIDE_FROM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-SUB_ITEM_FROM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-TKONN sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-TPOSN sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-SIDE_TO sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-TPOSN_COM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-ASSGD_QUAN sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-ASSGD_QUAN_ORIG sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-ASSGD_UOM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-A_GUID sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-PRED_A_GUID sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-PRED_QUAN sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-FROZEN sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CR_NAME sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CR_DATE sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CR_TIME sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CH_NAME sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CH_DATE sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CH_TIME sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CANCEL_FLAG sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-_DATAAGING sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-PLACE_HOLDER sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-UPDKZ sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-APPL_GUID sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-APPL_VERSION sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-UIS_ID sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-UIS_GUID sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-UIS_TYPE sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-UIS_GROUP_ID sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-CONTRACT_INSTR sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-UIS_ITEM sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-APPLY_DATE sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-LDC_EVENT_DATE sy-vline 
WA_/ACCGO/S_PRC_APPL_ASSGMT_LINK_STR-BOL_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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