ABAP Select data from SAP table PKZ_DEDUCT_GROUP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKZ_DEDUCT_GROUP
*  INTO TABLE @DATA(IT_PKZ_DEDUCT_GROUP2).
*--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_PKZ_DEDUCT_GROUP INDEX 1 INTO DATA(WA_PKZ_DEDUCT_GROUP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKZ_DEDUCT_GROUP>-DPRIO = 1.
<PKZ_DEDUCT_GROUP>-WEIGH = 1.
<PKZ_DEDUCT_GROUP>-DEGRP = 1.
<PKZ_DEDUCT_GROUP>-REGEL = 1.
<PKZ_DEDUCT_GROUP>-MAXRE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKZ_DEDUCT_GROUP-DECRR, sy-vline,
  WA_PKZ_DEDUCT_GROUP-LGARTS, sy-vline,
  WA_PKZ_DEDUCT_GROUP-GRLIM, sy-vline,
  WA_PKZ_DEDUCT_GROUP-POSSIBLE, sy-vline,
  WA_PKZ_DEDUCT_GROUP-ORIGLIMIT, sy-vline,
  WA_PKZ_DEDUCT_GROUP-MAXREGEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKZ_DEDUCT_GROUP 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_PKZ_DEDUCT_GROUP 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_PKZ_DEDUCT_GROUP INTO WA_PKZ_DEDUCT_GROUP.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PKZ_DEDUCT_GROUP_STR, 
DPRIO TYPE STRING,
WEIGH TYPE STRING,
DEGRP TYPE STRING,
REGEL TYPE STRING,
MAXRE TYPE STRING,
DECRR TYPE STRING,
LGARTS TYPE STRING,
GRLIM TYPE STRING,
POSSIBLE TYPE STRING,
ORIGLIMIT TYPE STRING,
MAXREGEL TYPE STRING,
MAXLIMIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKZ_DEDUCT_GROUP_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_PKZ_DEDUCT_GROUP_STR-DPRIO sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-WEIGH sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-DEGRP sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-REGEL sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-MAXRE sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-DECRR sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-LGARTS sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-GRLIM sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-POSSIBLE sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-ORIGLIMIT sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-MAXREGEL sy-vline 
WA_PKZ_DEDUCT_GROUP_STR-MAXLIMIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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