ABAP Select data from SAP table PKHD_CORR_DET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKHD_CORR_DET
*  INTO TABLE @DATA(IT_PKHD_CORR_DET2).
*--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_PKHD_CORR_DET INDEX 1 INTO DATA(WA_PKHD_CORR_DET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKHD_CORR_DET>-ICON = 1.
<PKHD_CORR_DET>-LQNUM = 1.
<PKHD_CORR_DET>-PKNUM = 1.
<PKHD_CORR_DET>-MATNR = 1.
<PKHD_CORR_DET>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKHD_CORR_DET-PRVBE, sy-vline,
  WA_PKHD_CORR_DET-LGORT, sy-vline,
  WA_PKHD_CORR_DET-LGNUM, sy-vline,
  WA_PKHD_CORR_DET-LGTYP, sy-vline,
  WA_PKHD_CORR_DET-LGPLA, sy-vline,
  WA_PKHD_CORR_DET-MAKTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKHD_CORR_DET 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_PKHD_CORR_DET 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_PKHD_CORR_DET INTO WA_PKHD_CORR_DET.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_CORR_DET-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_CORR_DET-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_CORR_DET-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_CORR_DET-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_CORR_DET-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_CORR_DET-SONUM.
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_PKHD_CORR_DET_STR, 
ICON TYPE STRING,
LQNUM TYPE STRING,
PKNUM TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PRVBE TYPE STRING,
LGORT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
MAKTX TYPE STRING,
SYSMG TYPE STRING,
KORMG TYPE STRING,
SOLMG TYPE STRING,
ISTMG TYPE STRING,
MEINS TYPE STRING,
KZNUL TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
RKSTA TYPE STRING,
LETYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKHD_CORR_DET_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_PKHD_CORR_DET_STR-ICON sy-vline 
WA_PKHD_CORR_DET_STR-LQNUM sy-vline 
WA_PKHD_CORR_DET_STR-PKNUM sy-vline 
WA_PKHD_CORR_DET_STR-MATNR sy-vline 
WA_PKHD_CORR_DET_STR-WERKS sy-vline 
WA_PKHD_CORR_DET_STR-PRVBE sy-vline 
WA_PKHD_CORR_DET_STR-LGORT sy-vline 
WA_PKHD_CORR_DET_STR-LGNUM sy-vline 
WA_PKHD_CORR_DET_STR-LGTYP sy-vline 
WA_PKHD_CORR_DET_STR-LGPLA sy-vline 
WA_PKHD_CORR_DET_STR-MAKTX sy-vline 
WA_PKHD_CORR_DET_STR-SYSMG sy-vline 
WA_PKHD_CORR_DET_STR-KORMG sy-vline 
WA_PKHD_CORR_DET_STR-SOLMG sy-vline 
WA_PKHD_CORR_DET_STR-ISTMG sy-vline 
WA_PKHD_CORR_DET_STR-MEINS sy-vline 
WA_PKHD_CORR_DET_STR-KZNUL sy-vline 
WA_PKHD_CORR_DET_STR-CHARG sy-vline 
WA_PKHD_CORR_DET_STR-BESTQ sy-vline 
WA_PKHD_CORR_DET_STR-SOBKZ sy-vline 
WA_PKHD_CORR_DET_STR-SONUM sy-vline 
WA_PKHD_CORR_DET_STR-RKSTA sy-vline 
WA_PKHD_CORR_DET_STR-LETYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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