ABAP Select data from SAP table IEPREVIEWDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEPREVIEWDATA
*  INTO TABLE @DATA(IT_IEPREVIEWDATA2).
*--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_IEPREVIEWDATA INDEX 1 INTO DATA(WA_IEPREVIEWDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEPREVIEWDATA>-MANDT = 1.
<IEPREVIEWDATA>-ENGAGEMENTPROJECT = 1.
<IEPREVIEWDATA>-ENGAGEMENTPROJECTUUID = 1.
<IEPREVIEWDATA>-PROJECTSTARTDATE = 1.
<IEPREVIEWDATA>-PROJECTENDDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEPREVIEWDATA-ENGAGEMENTPROJECTNAME, sy-vline,
  WA_IEPREVIEWDATA-PROJECTVISIBILITY, sy-vline,
  WA_IEPREVIEWDATA-PROJECTLASTCHANGEDDATETIME, sy-vline,
  WA_IEPREVIEWDATA-ENGAGEMENTPROJFINPLANUUID, sy-vline,
  WA_IEPREVIEWDATA-ENGMNTPROJREVIEWYEARPERIOD, sy-vline,
  WA_IEPREVIEWDATA-ENGAGEMENTPROJECTREVIEWSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEPREVIEWDATA 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_IEPREVIEWDATA 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_IEPREVIEWDATA INTO WA_IEPREVIEWDATA.


*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 GJAHR, internal->external for field ENGMNTPROJREVIEWYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IEPREVIEWDATA-ENGMNTPROJREVIEWYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEPREVIEWDATA-ENGMNTPROJREVIEWYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IEPREVIEWDATA-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEPREVIEWDATA-UNITOFMEASURE.
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_IEPREVIEWDATA_STR, 
MANDT TYPE STRING,
ENGAGEMENTPROJECT TYPE STRING,
ENGAGEMENTPROJECTUUID TYPE STRING,
PROJECTSTARTDATE TYPE STRING,
PROJECTENDDATE TYPE STRING,
ENGAGEMENTPROJECTNAME TYPE STRING,
PROJECTVISIBILITY TYPE STRING,
PROJECTLASTCHANGEDDATETIME TYPE STRING,
ENGAGEMENTPROJFINPLANUUID TYPE STRING,
ENGMNTPROJREVIEWYEARPERIOD TYPE STRING,
ENGAGEMENTPROJECTREVIEWSTATUS TYPE STRING,
FISCALYEARVARIANT TYPE STRING,
ENGMNTPROJREVIEWYEAR TYPE STRING,
ENGMNTPROJREVIEWPERIOD TYPE STRING,
ENGMTPROJFINPLANVERSION TYPE STRING,
CUSTOMER TYPE STRING,
CUSTOMERNAME TYPE STRING,
CITYNAME TYPE STRING,
ENGAGEMENTPROJECTSTAGE TYPE STRING,
ENGAGEMENTPROJECTCATEGORY TYPE STRING,
ENGAGEMENTPROJECTSERVICEORG TYPE STRING,
ENGAGEMENTPROJECTTYPE TYPE STRING,
WORKPACKAGE TYPE STRING,
WORKITEM TYPE STRING,
ENGAGEMENTPROJECTRESOURCETYPE TYPE STRING,
ENGAGEMENTPROJECTRESOURCE TYPE STRING,
PROJECTMANAGER TYPE STRING,
FISCALPERIOD TYPE STRING,
FISCALYEAR TYPE STRING,
FISCALYEARPERIOD TYPE STRING,
CURRENCY TYPE STRING,
UNITOFMEASURE TYPE STRING,
ACTLEFFORTQTY TYPE STRING,
PLNDEFFORTQTY TYPE STRING,
ACTLCOSTAMT TYPE STRING,
PLNDCOSTAMT TYPE STRING,
PLNDREVNAMT TYPE STRING,
ACTUALPLANDEVIATIONCOST TYPE STRING,
ACTUALPLANDEVIATIONEFFORT TYPE STRING,
ENGMNTPROJPLANLINETYPE TYPE STRING,
ENGMNTPROJECTDELIVERYORG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEPREVIEWDATA_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_IEPREVIEWDATA_STR-MANDT sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECT sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTUUID sy-vline 
WA_IEPREVIEWDATA_STR-PROJECTSTARTDATE sy-vline 
WA_IEPREVIEWDATA_STR-PROJECTENDDATE sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTNAME sy-vline 
WA_IEPREVIEWDATA_STR-PROJECTVISIBILITY sy-vline 
WA_IEPREVIEWDATA_STR-PROJECTLASTCHANGEDDATETIME sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJFINPLANUUID sy-vline 
WA_IEPREVIEWDATA_STR-ENGMNTPROJREVIEWYEARPERIOD sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTREVIEWSTATUS sy-vline 
WA_IEPREVIEWDATA_STR-FISCALYEARVARIANT sy-vline 
WA_IEPREVIEWDATA_STR-ENGMNTPROJREVIEWYEAR sy-vline 
WA_IEPREVIEWDATA_STR-ENGMNTPROJREVIEWPERIOD sy-vline 
WA_IEPREVIEWDATA_STR-ENGMTPROJFINPLANVERSION sy-vline 
WA_IEPREVIEWDATA_STR-CUSTOMER sy-vline 
WA_IEPREVIEWDATA_STR-CUSTOMERNAME sy-vline 
WA_IEPREVIEWDATA_STR-CITYNAME sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTSTAGE sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTCATEGORY sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTSERVICEORG sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTTYPE sy-vline 
WA_IEPREVIEWDATA_STR-WORKPACKAGE sy-vline 
WA_IEPREVIEWDATA_STR-WORKITEM sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTRESOURCETYPE sy-vline 
WA_IEPREVIEWDATA_STR-ENGAGEMENTPROJECTRESOURCE sy-vline 
WA_IEPREVIEWDATA_STR-PROJECTMANAGER sy-vline 
WA_IEPREVIEWDATA_STR-FISCALPERIOD sy-vline 
WA_IEPREVIEWDATA_STR-FISCALYEAR sy-vline 
WA_IEPREVIEWDATA_STR-FISCALYEARPERIOD sy-vline 
WA_IEPREVIEWDATA_STR-CURRENCY sy-vline 
WA_IEPREVIEWDATA_STR-UNITOFMEASURE sy-vline 
WA_IEPREVIEWDATA_STR-ACTLEFFORTQTY sy-vline 
WA_IEPREVIEWDATA_STR-PLNDEFFORTQTY sy-vline 
WA_IEPREVIEWDATA_STR-ACTLCOSTAMT sy-vline 
WA_IEPREVIEWDATA_STR-PLNDCOSTAMT sy-vline 
WA_IEPREVIEWDATA_STR-PLNDREVNAMT sy-vline 
WA_IEPREVIEWDATA_STR-ACTUALPLANDEVIATIONCOST sy-vline 
WA_IEPREVIEWDATA_STR-ACTUALPLANDEVIATIONEFFORT sy-vline 
WA_IEPREVIEWDATA_STR-ENGMNTPROJPLANLINETYPE sy-vline 
WA_IEPREVIEWDATA_STR-ENGMNTPROJECTDELIVERYORG sy-vline      INTO ld_text SEPARATED BY SPACE.

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