ABAP Select data from SAP table WFDSS_UI_SI_DEMAND_DETAILS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFDSS_UI_SI_DEMAND_DETAILS
*  INTO TABLE @DATA(IT_WFDSS_UI_SI_DEMAND_DETAILS2).
*--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_WFDSS_UI_SI_DEMAND_DETAILS INDEX 1 INTO DATA(WA_WFDSS_UI_SI_DEMAND_DETAILS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFDSS_UI_SI_DEMAND_DETAILS>-ORDER_ID = 1.
<WFDSS_UI_SI_DEMAND_DETAILS>-ITEM_NUMBER = 1.
<WFDSS_UI_SI_DEMAND_DETAILS>-SUP_ITEM_NUMBER = 1.
<WFDSS_UI_SI_DEMAND_DETAILS>-ITEM_STATUS_TEXT = 1.
<WFDSS_UI_SI_DEMAND_DETAILS>-HEADER_DESCRIPTI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFDSS_UI_SI_DEMAND_DETAILS-FDSE_ITEM_DESCRIPTION, sy-vline,
  WA_WFDSS_UI_SI_DEMAND_DETAILS-SRV_PRODUCT, sy-vline,
  WA_WFDSS_UI_SI_DEMAND_DETAILS-TRANSACTION_TYPE, sy-vline,
  WA_WFDSS_UI_SI_DEMAND_DETAILS-ITEM_TYPE, sy-vline,
  WA_WFDSS_UI_SI_DEMAND_DETAILS-PRIORITY, sy-vline,
  WA_WFDSS_UI_SI_DEMAND_DETAILS-DURATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFDSS_UI_SI_DEMAND_DETAILS 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_WFDSS_UI_SI_DEMAND_DETAILS 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_WFDSS_UI_SI_DEMAND_DETAILS INTO WA_WFDSS_UI_SI_DEMAND_DETAILS.


*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 CUNIT, internal->external for field DURATION_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WFDSS_UI_SI_DEMAND_DETAILS-DURATION_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFDSS_UI_SI_DEMAND_DETAILS-DURATION_UNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LOC_BP_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WFDSS_UI_SI_DEMAND_DETAILS-LOC_BP_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WFDSS_UI_SI_DEMAND_DETAILS-LOC_BP_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_WFDSS_UI_SI_DEMAND_DETAILS_STR, 
ORDER_ID TYPE STRING,
ITEM_NUMBER TYPE STRING,
SUP_ITEM_NUMBER TYPE STRING,
ITEM_STATUS_TEXT TYPE STRING,
HEADER_DESCRIPTI TYPE STRING,
FDSE_ITEM_DESCRIPTION TYPE STRING,
SRV_PRODUCT TYPE STRING,
TRANSACTION_TYPE TYPE STRING,
ITEM_TYPE TYPE STRING,
PRIORITY TYPE STRING,
DURATION TYPE STRING,
DURATION_UNIT TYPE STRING,
ORG_ID TYPE STRING,
NUMBER_RESOURCES TYPE STRING,
BOOLEAN_PARTS TYPE STRING,
BOOLEAN_RELATION TYPE STRING,
BOOLEAN_QUALIFIC TYPE STRING,
TECH_OBJ_FROM TYPE STRING,
IOBJECT TYPE STRING,
IBASE TYPE STRING,
IBASE_COMPONENT TYPE STRING,
BPID TYPE STRING,
PARTNER_PF TYPE STRING,
LOCATION_FROM TYPE STRING,
LOC_STREET TYPE STRING,
LOC_HOUSE_NUMBER TYPE STRING,
LOC_COUNTRY TYPE STRING,
LOC_REGION TYPE STRING,
LOC_CITY TYPE STRING,
LOC_ZIP_CODE TYPE STRING,
LOC_BP_ID TYPE STRING,
LOC_IBASE_ID TYPE STRING,
LOC_IBASE_COMP TYPE STRING,
LOC_IOBJECT_ID TYPE STRING,
LOC_LATITUDE TYPE STRING,
LOC_LONGITUDE TYPE STRING,
LOC_PRECISID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFDSS_UI_SI_DEMAND_DETAILS_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_WFDSS_UI_SI_DEMAND_DETAILS_STR-ORDER_ID sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-ITEM_NUMBER sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-SUP_ITEM_NUMBER sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-ITEM_STATUS_TEXT sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-HEADER_DESCRIPTI sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-FDSE_ITEM_DESCRIPTION sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-SRV_PRODUCT sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-TRANSACTION_TYPE sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-ITEM_TYPE sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-PRIORITY sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-DURATION sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-DURATION_UNIT sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-ORG_ID sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-NUMBER_RESOURCES sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-BOOLEAN_PARTS sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-BOOLEAN_RELATION sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-BOOLEAN_QUALIFIC sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-TECH_OBJ_FROM sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-IOBJECT sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-IBASE sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-IBASE_COMPONENT sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-BPID sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-PARTNER_PF sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOCATION_FROM sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_STREET sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_HOUSE_NUMBER sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_COUNTRY sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_REGION sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_CITY sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_ZIP_CODE sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_BP_ID sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_IBASE_ID sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_IBASE_COMP sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_IOBJECT_ID sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_LATITUDE sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_LONGITUDE sy-vline 
WA_WFDSS_UI_SI_DEMAND_DETAILS_STR-LOC_PRECISID sy-vline      INTO ld_text SEPARATED BY SPACE.

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