ABAP Select data from SAP table IPROJBYEXTKEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IPROJBYEXTKEY
*  INTO TABLE @DATA(IT_IPROJBYEXTKEY2).
*--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_IPROJBYEXTKEY INDEX 1 INTO DATA(WA_IPROJBYEXTKEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IPROJBYEXTKEY>-MANDT = 1.
<IPROJBYEXTKEY>-PROJECTEXTERNALID = 1.
<IPROJBYEXTKEY>-PROJECTINTERNALID = 1.
<IPROJBYEXTKEY>-PROJECTDESCRIPTION = 1.
<IPROJBYEXTKEY>-PROJECTPROFILECODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IPROJBYEXTKEY-COMPANYCODE, sy-vline,
  WA_IPROJBYEXTKEY-CONTROLLINGAREA, sy-vline,
  WA_IPROJBYEXTKEY-FUNCTIONALAREA, sy-vline,
  WA_IPROJBYEXTKEY-PROFITCENTER, sy-vline,
  WA_IPROJBYEXTKEY-PROJECTOBJECT, sy-vline,
  WA_IPROJBYEXTKEY-PLANNEDSTARTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IPROJBYEXTKEY 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_IPROJBYEXTKEY 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_IPROJBYEXTKEY INTO WA_IPROJBYEXTKEY.


*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 PROFITCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IPROJBYEXTKEY-PROFITCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPROJBYEXTKEY-PROFITCENTER.
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_IPROJBYEXTKEY_STR, 
MANDT TYPE STRING,
PROJECTEXTERNALID TYPE STRING,
PROJECTINTERNALID TYPE STRING,
PROJECTDESCRIPTION TYPE STRING,
PROJECTPROFILECODE TYPE STRING,
COMPANYCODE TYPE STRING,
CONTROLLINGAREA TYPE STRING,
FUNCTIONALAREA TYPE STRING,
PROFITCENTER TYPE STRING,
PROJECTOBJECT TYPE STRING,
PLANNEDSTARTDATE TYPE STRING,
PLANNEDENDDATE TYPE STRING,
AVAILABILITYCONTROLPROFILE TYPE STRING,
AVAILABILITYCONTROLISACTIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IPROJBYEXTKEY_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_IPROJBYEXTKEY_STR-MANDT sy-vline 
WA_IPROJBYEXTKEY_STR-PROJECTEXTERNALID sy-vline 
WA_IPROJBYEXTKEY_STR-PROJECTINTERNALID sy-vline 
WA_IPROJBYEXTKEY_STR-PROJECTDESCRIPTION sy-vline 
WA_IPROJBYEXTKEY_STR-PROJECTPROFILECODE sy-vline 
WA_IPROJBYEXTKEY_STR-COMPANYCODE sy-vline 
WA_IPROJBYEXTKEY_STR-CONTROLLINGAREA sy-vline 
WA_IPROJBYEXTKEY_STR-FUNCTIONALAREA sy-vline 
WA_IPROJBYEXTKEY_STR-PROFITCENTER sy-vline 
WA_IPROJBYEXTKEY_STR-PROJECTOBJECT sy-vline 
WA_IPROJBYEXTKEY_STR-PLANNEDSTARTDATE sy-vline 
WA_IPROJBYEXTKEY_STR-PLANNEDENDDATE sy-vline 
WA_IPROJBYEXTKEY_STR-AVAILABILITYCONTROLPROFILE sy-vline 
WA_IPROJBYEXTKEY_STR-AVAILABILITYCONTROLISACTIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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