ABAP Select data from SAP table CRSHRESBOOK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRSHRESBOOK
*  INTO TABLE @DATA(IT_CRSHRESBOOK2).
*--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_CRSHRESBOOK INDEX 1 INTO DATA(WA_CRSHRESBOOK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRSHRESBOOK>-MANDT = 1.
<CRSHRESBOOK>-PROJASSIGNMENTUUID = 1.
<CRSHRESBOOK>-RESOURCEDEMANDUUID = 1.
<CRSHRESBOOK>-EMPLOYMENTINTERNALID = 1.
<CRSHRESBOOK>-PROJASSIGNMENTSTARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRSHRESBOOK-PROJASSIGNMENTENDDATE, sy-vline,
  WA_CRSHRESBOOK-UNITOFMEASURE, sy-vline,
  WA_CRSHRESBOOK-EMPLOYEEREQUESTASSIGNDURATION, sy-vline,
  WA_CRSHRESBOOK-AUTHORIZATIONGROUP, sy-vline,
  WA_CRSHRESBOOK-ISBUSINESSPURPOSECOMPLETED, sy-vline,
  WA_CRSHRESBOOK-COMPANYCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRSHRESBOOK 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_CRSHRESBOOK 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_CRSHRESBOOK INTO WA_CRSHRESBOOK.


*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 UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRSHRESBOOK-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRSHRESBOOK-UNITOFMEASURE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRSHRESBOOK-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRSHRESBOOK-COSTCENTER.
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_CRSHRESBOOK_STR, 
MANDT TYPE STRING,
PROJASSIGNMENTUUID TYPE STRING,
RESOURCEDEMANDUUID TYPE STRING,
EMPLOYMENTINTERNALID TYPE STRING,
PROJASSIGNMENTSTARTDATE TYPE STRING,
PROJASSIGNMENTENDDATE TYPE STRING,
UNITOFMEASURE TYPE STRING,
EMPLOYEEREQUESTASSIGNDURATION TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
ISBUSINESSPURPOSECOMPLETED TYPE STRING,
COMPANYCODE TYPE STRING,
COSTCENTER TYPE STRING,
SERVICEORGANIZATION TYPE STRING,
ENGAGEMENTPROJECTSTAGE TYPE STRING,
ISEDITABLE TYPE STRING,
EMPLOYEEREQUESTISRESPFOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRSHRESBOOK_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_CRSHRESBOOK_STR-MANDT sy-vline 
WA_CRSHRESBOOK_STR-PROJASSIGNMENTUUID sy-vline 
WA_CRSHRESBOOK_STR-RESOURCEDEMANDUUID sy-vline 
WA_CRSHRESBOOK_STR-EMPLOYMENTINTERNALID sy-vline 
WA_CRSHRESBOOK_STR-PROJASSIGNMENTSTARTDATE sy-vline 
WA_CRSHRESBOOK_STR-PROJASSIGNMENTENDDATE sy-vline 
WA_CRSHRESBOOK_STR-UNITOFMEASURE sy-vline 
WA_CRSHRESBOOK_STR-EMPLOYEEREQUESTASSIGNDURATION sy-vline 
WA_CRSHRESBOOK_STR-AUTHORIZATIONGROUP sy-vline 
WA_CRSHRESBOOK_STR-ISBUSINESSPURPOSECOMPLETED sy-vline 
WA_CRSHRESBOOK_STR-COMPANYCODE sy-vline 
WA_CRSHRESBOOK_STR-COSTCENTER sy-vline 
WA_CRSHRESBOOK_STR-SERVICEORGANIZATION sy-vline 
WA_CRSHRESBOOK_STR-ENGAGEMENTPROJECTSTAGE sy-vline 
WA_CRSHRESBOOK_STR-ISEDITABLE sy-vline 
WA_CRSHRESBOOK_STR-EMPLOYEEREQUESTISRESPFOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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