ABAP Select data from SAP table RK22B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RK22B 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 RK22B. 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 RK22B 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_RK22B TYPE STANDARD TABLE OF RK22B,
      WA_RK22B TYPE RK22B,
      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: <RK22B> TYPE RK22B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RK22B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RK22B
  INTO TABLE IT_RK22B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RK22B
*  INTO TABLE @DATA(IT_RK22B2).
*--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_RK22B INDEX 1 INTO DATA(WA_RK22B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RK22B ASSIGNING <RK22B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RK22B>-KOKRS = 1.
<RK22B>-TWAER = 1.
<RK22B>-WAERS = 1.
<RK22B>-PLDAT = 1.
<RK22B>-GJAHR = 1.

ENDLOOP.

LOOP AT IT_RK22B INTO WA_RK22B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RK22B-RVERS, sy-vline,
  WA_RK22B-SET, sy-vline,
  WA_RK22B-KOSTL, sy-vline,
  WA_RK22B-KSTXT, sy-vline,
  WA_RK22B-KSTAR, sy-vline,
  WA_RK22B-KATXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RK22B 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_RK22B 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_RK22B INTO WA_RK22B.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RK22B-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK22B-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK22B-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK22B-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK22B-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK22B-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RK22B-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK22B-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field IKPSU
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RK22B-IKPSU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK22B-IKPSU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field IKPTO
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RK22B-IKPTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK22B-IKPTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MSEHI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RK22B-MSEHI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RK22B-MSEHI.
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_RK22B_STR, 
KOKRS TYPE STRING,
TWAER TYPE STRING,
WAERS TYPE STRING,
PLDAT TYPE STRING,
GJAHR TYPE STRING,
RVERS TYPE STRING,
SET TYPE STRING,
KOSTL TYPE STRING,
KSTXT TYPE STRING,
KSTAR TYPE STRING,
KATXT TYPE STRING,
ZLENR TYPE STRING,
FIELDVALUE TYPE STRING,
SPPKF TYPE STRING,
IKPSU TYPE STRING,
IKPTO TYPE STRING,
SPVBF TYPE STRING,
IVBSU TYPE STRING,
IVBTO TYPE STRING,
MSEHI TYPE STRING,
ACTIO TYPE STRING,
NPAGE TYPE STRING,
CPAGE TYPE STRING,
NITEM TYPE STRING,
CITEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RK22B_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_RK22B_STR-KOKRS sy-vline 
WA_RK22B_STR-TWAER sy-vline 
WA_RK22B_STR-WAERS sy-vline 
WA_RK22B_STR-PLDAT sy-vline 
WA_RK22B_STR-GJAHR sy-vline 
WA_RK22B_STR-RVERS sy-vline 
WA_RK22B_STR-SET sy-vline 
WA_RK22B_STR-KOSTL sy-vline 
WA_RK22B_STR-KSTXT sy-vline 
WA_RK22B_STR-KSTAR sy-vline 
WA_RK22B_STR-KATXT sy-vline 
WA_RK22B_STR-ZLENR sy-vline 
WA_RK22B_STR-FIELDVALUE sy-vline 
WA_RK22B_STR-SPPKF sy-vline 
WA_RK22B_STR-IKPSU sy-vline 
WA_RK22B_STR-IKPTO sy-vline 
WA_RK22B_STR-SPVBF sy-vline 
WA_RK22B_STR-IVBSU sy-vline 
WA_RK22B_STR-IVBTO sy-vline 
WA_RK22B_STR-MSEHI sy-vline 
WA_RK22B_STR-ACTIO sy-vline 
WA_RK22B_STR-NPAGE sy-vline 
WA_RK22B_STR-CPAGE sy-vline 
WA_RK22B_STR-NITEM sy-vline 
WA_RK22B_STR-CITEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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