ABAP Select data from SAP table IPRODSPECCMPAHDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IPRODSPECCMPAHDR
*  INTO TABLE @DATA(IT_IPRODSPECCMPAHDR2).
*--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_IPRODSPECCMPAHDR INDEX 1 INTO DATA(WA_IPRODSPECCMPAHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IPRODSPECCMPAHDR>-MANDT = 1.
<IPRODSPECCMPAHDR>-PRODSPECCMPSTNHEADER = 1.
<IPRODSPECCMPAHDR>-PRODSPECCMPSTNHDRCHANGESTATE = 1.
<IPRODSPECCMPAHDR>-PRODUCTSPECIFICATIONINTERNALID = 1.
<IPRODSPECCMPAHDR>-PRODSPECCMPSTNHDRCHANGENUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRSORTSEQUENCE, sy-vline,
  WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRVALDTYSTRTDTE, sy-vline,
  WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRVALDTYENDDTE, sy-vline,
  WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRISDELETED, sy-vline,
  WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRVALASSGMTTYPE, sy-vline,
  WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRRATING, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IPRODSPECCMPAHDR 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_IPRODSPECCMPAHDR 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_IPRODSPECCMPAHDR INTO WA_IPRODSPECCMPAHDR.


*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 PRODSPECCMPSTNHEADER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHEADER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHEADER.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field PRODSPECCMPSTNHDRCHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRCHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPRODSPECCMPAHDR-PRODSPECCMPSTNHDRCHANGENUMBER.
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_IPRODSPECCMPAHDR_STR, 
MANDT TYPE STRING,
PRODSPECCMPSTNHEADER TYPE STRING,
PRODSPECCMPSTNHDRCHANGESTATE TYPE STRING,
PRODUCTSPECIFICATIONINTERNALID TYPE STRING,
PRODSPECCMPSTNHDRCHANGENUMBER TYPE STRING,
PRODSPECCMPSTNHDRSORTSEQUENCE TYPE STRING,
PRODSPECCMPSTNHDRVALDTYSTRTDTE TYPE STRING,
PRODSPECCMPSTNHDRVALDTYENDDTE TYPE STRING,
PRODSPECCMPSTNHDRISDELETED TYPE STRING,
PRODSPECCMPSTNHDRVALASSGMTTYPE TYPE STRING,
PRODSPECCMPSTNHDRRATING TYPE STRING,
PRODSPECCMPSTNHDRVALIDITYAREA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IPRODSPECCMPAHDR_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_IPRODSPECCMPAHDR_STR-MANDT sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHEADER sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRCHANGESTATE sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODUCTSPECIFICATIONINTERNALID sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRCHANGENUMBER sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRSORTSEQUENCE sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRVALDTYSTRTDTE sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRVALDTYENDDTE sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRISDELETED sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRVALASSGMTTYPE sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRRATING sy-vline 
WA_IPRODSPECCMPAHDR_STR-PRODSPECCMPSTNHDRVALIDITYAREA sy-vline      INTO ld_text SEPARATED BY SPACE.

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