ABAP Select data from SAP table CSSPPRMAINTHDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSSPPRMAINTHDR
*  INTO TABLE @DATA(IT_CSSPPRMAINTHDR2).
*--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_CSSPPRMAINTHDR INDEX 1 INTO DATA(WA_CSSPPRMAINTHDR2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSSPPRMAINTHDR-PURREQNEMPLBYREQNGRPOFAUTHOR, sy-vline,
  WA_CSSPPRMAINTHDR-PURREQNSSPAUTHOR, sy-vline,
  WA_CSSPPRMAINTHDR-PURCHASEREQUISITIONTYPE, sy-vline,
  WA_CSSPPRMAINTHDR-CREATIONDATE, sy-vline,
  WA_CSSPPRMAINTHDR-EMPLOYEEFULLNAME, sy-vline,
  WA_CSSPPRMAINTHDR-PURREQNORIGIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSSPPRMAINTHDR 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_CSSPPRMAINTHDR 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_CSSPPRMAINTHDR INTO WA_CSSPPRMAINTHDR.


*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_CSSPPRMAINTHDR-PURCHASEREQUISITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSSPPRMAINTHDR-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_CSSPPRMAINTHDR_STR, 
MANDT TYPE STRING,
PURCHASEREQUISITION TYPE STRING,
PURREQNDESCRIPTION TYPE STRING,
PURREQNSSPREQUESTOR TYPE STRING,
PURREQNEMPLBYCOOFAUTHOR TYPE STRING,
PURREQNEMPLBYREQNGRPOFAUTHOR 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,
PURREQNHEADERCURRENCYSOURCE TYPE STRING,
PURREQNHDRCURRENCYSOURCEDESC TYPE STRING,
ISPURREQNOVRLREL TYPE STRING,
PURREQNISAPPLICABLEFORREWORK TYPE STRING,
PURREQNAPPROVERCOMMENTTEXT TYPE STRING,
PURREQNREWORKCOMMENTTEXT TYPE STRING,
PURREQNREJECTIONISCANCELLED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSSPPRMAINTHDR_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_CSSPPRMAINTHDR_STR-MANDT sy-vline 
WA_CSSPPRMAINTHDR_STR-PURCHASEREQUISITION sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNDESCRIPTION sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNSSPREQUESTOR sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNEMPLBYCOOFAUTHOR sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNEMPLBYREQNGRPOFAUTHOR sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNSSPAUTHOR sy-vline 
WA_CSSPPRMAINTHDR_STR-PURCHASEREQUISITIONTYPE sy-vline 
WA_CSSPPRMAINTHDR_STR-CREATIONDATE sy-vline 
WA_CSSPPRMAINTHDR_STR-EMPLOYEEFULLNAME sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNORIGIN sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNLIFECYCLESTATUS sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNLIFECYCLESTATUSNAME sy-vline 
WA_CSSPPRMAINTHDR_STR-NUMBEROFITEMS sy-vline 
WA_CSSPPRMAINTHDR_STR-TOTALNETAMOUNT sy-vline 
WA_CSSPPRMAINTHDR_STR-CURRENCY sy-vline 
WA_CSSPPRMAINTHDR_STR-ISSRCHENABLED sy-vline 
WA_CSSPPRMAINTHDR_STR-ISEXTPURGSCENARIO sy-vline 
WA_CSSPPRMAINTHDR_STR-ISONBEHALFCART sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNISCOPYDRAFT sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNSOURCEAPPLICATION sy-vline 
WA_CSSPPRMAINTHDR_STR-BUSINESSUSER sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNISCREATEDINEXPERTMODE sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNHEADERCURRENCYSOURCE sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNHDRCURRENCYSOURCEDESC sy-vline 
WA_CSSPPRMAINTHDR_STR-ISPURREQNOVRLREL sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNISAPPLICABLEFORREWORK sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNAPPROVERCOMMENTTEXT sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNREWORKCOMMENTTEXT sy-vline 
WA_CSSPPRMAINTHDR_STR-PURREQNREJECTIONISCANCELLED sy-vline      INTO ld_text SEPARATED BY SPACE.

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