ABAP Select data from SAP table CGBPRMAINTHDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CGBPRMAINTHDR
*  INTO TABLE @DATA(IT_CGBPRMAINTHDR2).
*--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_CGBPRMAINTHDR INDEX 1 INTO DATA(WA_CGBPRMAINTHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CGBPRMAINTHDR>-MANDT = 1.
<CGBPRMAINTHDR>-PURCHASEREQUISITION = 1.
<CGBPRMAINTHDR>-PURREQNDESCRIPTION = 1.
<CGBPRMAINTHDR>-PURREQNSSPREQUESTOR = 1.
<CGBPRMAINTHDR>-PURREQNSSPAUTHOR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CGBPRMAINTHDR-PURCHASEREQUISITIONTYPE, sy-vline,
  WA_CGBPRMAINTHDR-CREATIONDATE, sy-vline,
  WA_CGBPRMAINTHDR-EMPLOYEEFULLNAME, sy-vline,
  WA_CGBPRMAINTHDR-PURREQNORIGIN, sy-vline,
  WA_CGBPRMAINTHDR-PURREQNLIFECYCLESTATUS, sy-vline,
  WA_CGBPRMAINTHDR-PURREQNLIFECYCLESTATUSNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CGBPRMAINTHDR 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_CGBPRMAINTHDR 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_CGBPRMAINTHDR INTO WA_CGBPRMAINTHDR.


*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 PURCHASEREQUISITION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CGBPRMAINTHDR-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CGBPRMAINTHDR-PURCHASEREQUISITION.
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_CGBPRMAINTHDR_STR, 
MANDT TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURREQNDESCRIPTION TYPE STRING,
PURREQNSSPREQUESTOR TYPE STRING,
PURREQNSSPAUTHOR TYPE STRING,
PURCHASEREQUISITIONTYPE TYPE STRING,
CREATIONDATE TYPE STRING,
EMPLOYEEFULLNAME TYPE STRING,
PURREQNORIGIN TYPE STRING,
PURREQNLIFECYCLESTATUS TYPE STRING,
PURREQNLIFECYCLESTATUSNAME TYPE STRING,
NUMBEROFITEMS TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
CURRENCY TYPE STRING,
ISSRCHENABLED TYPE STRING,
ISEXTPURGSCENARIO TYPE STRING,
ISONBEHALFCART TYPE STRING,
PURREQNISCOPYDRAFT TYPE STRING,
PURREQNSOURCEAPPLICATION TYPE STRING,
BUSINESSUSER TYPE STRING,
PURREQNISCREATEDINEXPERTMODE TYPE STRING,
ACCOUNTASSIGNMENTCATEGORY TYPE STRING,
ACCTASSIGNMENTCATEGORYNAME TYPE STRING,
PRIMARYCOSTOBJECT TYPE STRING,
PRIMARYCOSTOBJECTNAME TYPE STRING,
DELIVERYDURATIONINDAYS TYPE STRING,
DELIVERYTIME TYPE STRING,
DELIVERYDATE TYPE STRING,
GPRREQRUSERID TYPE STRING,
GPRAUTHOREXTERNALBPIDNNUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CGBPRMAINTHDR_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_CGBPRMAINTHDR_STR-MANDT sy-vline 
WA_CGBPRMAINTHDR_STR-PURCHASEREQUISITION sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNDESCRIPTION sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNSSPREQUESTOR sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNSSPAUTHOR sy-vline 
WA_CGBPRMAINTHDR_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_CGBPRMAINTHDR_STR-CREATIONDATE sy-vline 
WA_CGBPRMAINTHDR_STR-EMPLOYEEFULLNAME sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNORIGIN sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNLIFECYCLESTATUS sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNLIFECYCLESTATUSNAME sy-vline 
WA_CGBPRMAINTHDR_STR-NUMBEROFITEMS sy-vline 
WA_CGBPRMAINTHDR_STR-TOTALNETAMOUNT sy-vline 
WA_CGBPRMAINTHDR_STR-CURRENCY sy-vline 
WA_CGBPRMAINTHDR_STR-ISSRCHENABLED sy-vline 
WA_CGBPRMAINTHDR_STR-ISEXTPURGSCENARIO sy-vline 
WA_CGBPRMAINTHDR_STR-ISONBEHALFCART sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNISCOPYDRAFT sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNSOURCEAPPLICATION sy-vline 
WA_CGBPRMAINTHDR_STR-BUSINESSUSER sy-vline 
WA_CGBPRMAINTHDR_STR-PURREQNISCREATEDINEXPERTMODE sy-vline 
WA_CGBPRMAINTHDR_STR-ACCOUNTASSIGNMENTCATEGORY sy-vline 
WA_CGBPRMAINTHDR_STR-ACCTASSIGNMENTCATEGORYNAME sy-vline 
WA_CGBPRMAINTHDR_STR-PRIMARYCOSTOBJECT sy-vline 
WA_CGBPRMAINTHDR_STR-PRIMARYCOSTOBJECTNAME sy-vline 
WA_CGBPRMAINTHDR_STR-DELIVERYDURATIONINDAYS sy-vline 
WA_CGBPRMAINTHDR_STR-DELIVERYTIME sy-vline 
WA_CGBPRMAINTHDR_STR-DELIVERYDATE sy-vline 
WA_CGBPRMAINTHDR_STR-GPRREQRUSERID sy-vline 
WA_CGBPRMAINTHDR_STR-GPRAUTHOREXTERNALBPIDNNUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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