ABAP Select data from SAP table CENGPRJWPWI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CENGPRJWPWI
*  INTO TABLE @DATA(IT_CENGPRJWPWI2).
*--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_CENGPRJWPWI INDEX 1 INTO DATA(WA_CENGPRJWPWI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CENGPRJWPWI>-MANDT = 1.
<CENGPRJWPWI>-ENGAGEMENTPROJFINPLANUUID = 1.
<CENGPRJWPWI>-WORKPACKAGEUUID = 1.
<CENGPRJWPWI>-ENGAGEMENTPROJECT = 1.
<CENGPRJWPWI>-CUSTOMER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CENGPRJWPWI-ENGAGEMENTPROJECTCATEGORY, sy-vline,
  WA_CENGPRJWPWI-WORKPACKAGE, sy-vline,
  WA_CENGPRJWPWI-WORKITEM, sy-vline,
  WA_CENGPRJWPWI-ENGAGEMENTPROJECTRESOURCE, sy-vline,
  WA_CENGPRJWPWI-ENGAGEMENTPROJECTSERVICEORG, sy-vline,
  WA_CENGPRJWPWI-ENGAGEMENTPROJECTNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CENGPRJWPWI 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_CENGPRJWPWI 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_CENGPRJWPWI INTO WA_CENGPRJWPWI.


*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 CUSTOMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CENGPRJWPWI-CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CENGPRJWPWI-CUSTOMER.
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_CENGPRJWPWI_STR, 
MANDT TYPE STRING,
ENGAGEMENTPROJFINPLANUUID TYPE STRING,
WORKPACKAGEUUID TYPE STRING,
ENGAGEMENTPROJECT TYPE STRING,
CUSTOMER TYPE STRING,
ENGAGEMENTPROJECTCATEGORY TYPE STRING,
WORKPACKAGE TYPE STRING,
WORKITEM TYPE STRING,
ENGAGEMENTPROJECTRESOURCE TYPE STRING,
ENGAGEMENTPROJECTSERVICEORG TYPE STRING,
ENGAGEMENTPROJECTNAME TYPE STRING,
CUSTOMERNAME TYPE STRING,
WORKPACKAGENAME TYPE STRING,
WORKITEMNAME TYPE STRING,
WBSELEMENTOBJECT TYPE STRING,
BILLINGCONTROLCATEGORY TYPE STRING,
PLNDEFFORTQTY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CENGPRJWPWI_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_CENGPRJWPWI_STR-MANDT sy-vline 
WA_CENGPRJWPWI_STR-ENGAGEMENTPROJFINPLANUUID sy-vline 
WA_CENGPRJWPWI_STR-WORKPACKAGEUUID sy-vline 
WA_CENGPRJWPWI_STR-ENGAGEMENTPROJECT sy-vline 
WA_CENGPRJWPWI_STR-CUSTOMER sy-vline 
WA_CENGPRJWPWI_STR-ENGAGEMENTPROJECTCATEGORY sy-vline 
WA_CENGPRJWPWI_STR-WORKPACKAGE sy-vline 
WA_CENGPRJWPWI_STR-WORKITEM sy-vline 
WA_CENGPRJWPWI_STR-ENGAGEMENTPROJECTRESOURCE sy-vline 
WA_CENGPRJWPWI_STR-ENGAGEMENTPROJECTSERVICEORG sy-vline 
WA_CENGPRJWPWI_STR-ENGAGEMENTPROJECTNAME sy-vline 
WA_CENGPRJWPWI_STR-CUSTOMERNAME sy-vline 
WA_CENGPRJWPWI_STR-WORKPACKAGENAME sy-vline 
WA_CENGPRJWPWI_STR-WORKITEMNAME sy-vline 
WA_CENGPRJWPWI_STR-WBSELEMENTOBJECT sy-vline 
WA_CENGPRJWPWI_STR-BILLINGCONTROLCATEGORY sy-vline 
WA_CENGPRJWPWI_STR-PLNDEFFORTQTY sy-vline      INTO ld_text SEPARATED BY SPACE.

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