ABAP Select data from SAP table /ACCGO/S_SI_DETAIL 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_SI_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 /ACCGO/S_SI_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 /ACCGO/S_SI_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_/ACCGO/S_SI_DETAIL TYPE STANDARD TABLE OF /ACCGO/S_SI_DETAIL,
      WA_/ACCGO/S_SI_DETAIL TYPE /ACCGO/S_SI_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: </ACCGO/S_SI_DETAIL> TYPE /ACCGO/S_SI_DETAIL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ACCGO/S_SI_DETAIL
*  INTO TABLE @DATA(IT_/ACCGO/S_SI_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_/ACCGO/S_SI_DETAIL INDEX 1 INTO DATA(WA_/ACCGO/S_SI_DETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ACCGO/S_SI_DETAIL>-SI_DOC_TYPE = 1.
</ACCGO/S_SI_DETAIL>-SI_DOC_ID = 1.
</ACCGO/S_SI_DETAIL>-SI_DOC_ITEM = 1.
</ACCGO/S_SI_DETAIL>-SI_DOC_YEAR = 1.
</ACCGO/S_SI_DETAIL>-DOCTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ACCGO/S_SI_DETAIL-DOCID, sy-vline,
  WA_/ACCGO/S_SI_DETAIL-DOCITEM, sy-vline,
  WA_/ACCGO/S_SI_DETAIL-DOCSUBITEM, sy-vline,
  WA_/ACCGO/S_SI_DETAIL-DOCYEAR, sy-vline,
  WA_/ACCGO/S_SI_DETAIL-SI_FORWARD_DOCID, sy-vline,
  WA_/ACCGO/S_SI_DETAIL-SI_FORWARD_ITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ACCGO/S_SI_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_/ACCGO/S_SI_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_/ACCGO/S_SI_DETAIL INTO WA_/ACCGO/S_SI_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 SI_DOC_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_SI_DETAIL-SI_DOC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_SI_DETAIL-SI_DOC_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field SI_DOC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_SI_DETAIL-SI_DOC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_SI_DETAIL-SI_DOC_YEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit GJAHR, internal->external for field DOCYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_SI_DETAIL-DOCYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_SI_DETAIL-DOCYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field SI_PRED_DOC_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ACCGO/S_SI_DETAIL-SI_PRED_DOC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ACCGO/S_SI_DETAIL-SI_PRED_DOC_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_SI_DETAIL_STR, 
SI_DOC_TYPE TYPE STRING,
SI_DOC_ID TYPE STRING,
SI_DOC_ITEM TYPE STRING,
SI_DOC_YEAR TYPE STRING,
DOCTYPE TYPE STRING,
DOCID TYPE STRING,
DOCITEM TYPE STRING,
DOCSUBITEM TYPE STRING,
DOCYEAR TYPE STRING,
SI_FORWARD_DOCID TYPE STRING,
SI_FORWARD_ITEM TYPE STRING,
SIDE TYPE STRING,
VBELN TYPE STRING,
INV_TYPE TYPE STRING,
DM_CR_REQ TYPE STRING,
DM_CR_TYPE TYPE STRING,
SI_PRED_DOC_TYPE TYPE STRING,
SI_PRED_DOC_ID TYPE STRING,
SI_PRED_DOC_ITEM TYPE STRING,
REVERSAL_FLAG TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_ON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ACCGO/S_SI_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_/ACCGO/S_SI_DETAIL_STR-SI_DOC_TYPE sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_DOC_ID sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_DOC_ITEM sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_DOC_YEAR sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-DOCTYPE sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-DOCID sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-DOCITEM sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-DOCSUBITEM sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-DOCYEAR sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_FORWARD_DOCID sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_FORWARD_ITEM sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SIDE sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-VBELN sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-INV_TYPE sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-DM_CR_REQ sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-DM_CR_TYPE sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_PRED_DOC_TYPE sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_PRED_DOC_ID sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-SI_PRED_DOC_ITEM sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-REVERSAL_FLAG sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-CREATED_BY sy-vline 
WA_/ACCGO/S_SI_DETAIL_STR-CREATED_ON sy-vline      INTO ld_text SEPARATED BY SPACE.

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