ABAP Select data from SAP table SERVICEDEMAND into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SERVICEDEMAND
*  INTO TABLE @DATA(IT_SERVICEDEMAND2).
*--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_SERVICEDEMAND INDEX 1 INTO DATA(WA_SERVICEDEMAND2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SERVICEDEMAND>-CLIENT = 1.
<SERVICEDEMAND>-PROJECTDEMANDSERVICEUUID = 1.
<SERVICEDEMAND>-PROJECTDEMANDUUID = 1.
<SERVICEDEMAND>-MATERIAL = 1.
<SERVICEDEMAND>-MATERIALGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SERVICEDEMAND-SUPPLIER, sy-vline,
  WA_SERVICEDEMAND-PURCHASINGINFORECORD, sy-vline,
  WA_SERVICEDEMAND-PURCHASECONTRACT, sy-vline,
  WA_SERVICEDEMAND-PURCHASECONTRACTITEM, sy-vline,
  WA_SERVICEDEMAND-MATERIALPLANNEDDELIVERYDURN, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_SERVICEDEMAND 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_SERVICEDEMAND 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_SERVICEDEMAND INTO WA_SERVICEDEMAND.


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

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

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

*Conversion exit ALPHA, internal->external for field PURCHASECONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SERVICEDEMAND-PURCHASECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SERVICEDEMAND-PURCHASECONTRACT.
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_SERVICEDEMAND_STR, 
CLIENT TYPE STRING,
PROJECTDEMANDSERVICEUUID TYPE STRING,
PROJECTDEMANDUUID TYPE STRING,
MATERIAL TYPE STRING,
MATERIALGROUP TYPE STRING,
SUPPLIER TYPE STRING,
PURCHASINGINFORECORD TYPE STRING,
PURCHASECONTRACT TYPE STRING,
PURCHASECONTRACTITEM TYPE STRING,
MATERIALPLANNEDDELIVERYDURN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SERVICEDEMAND_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_SERVICEDEMAND_STR-CLIENT sy-vline 
WA_SERVICEDEMAND_STR-PROJECTDEMANDSERVICEUUID sy-vline 
WA_SERVICEDEMAND_STR-PROJECTDEMANDUUID sy-vline 
WA_SERVICEDEMAND_STR-MATERIAL sy-vline 
WA_SERVICEDEMAND_STR-MATERIALGROUP sy-vline 
WA_SERVICEDEMAND_STR-SUPPLIER sy-vline 
WA_SERVICEDEMAND_STR-PURCHASINGINFORECORD sy-vline 
WA_SERVICEDEMAND_STR-PURCHASECONTRACT sy-vline 
WA_SERVICEDEMAND_STR-PURCHASECONTRACTITEM sy-vline 
WA_SERVICEDEMAND_STR-MATERIALPLANNEDDELIVERYDURN sy-vline      INTO ld_text SEPARATED BY SPACE.

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