ABAP Select data from SAP table CKMLRUNPERIOD_APPEND into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKMLRUNPERIOD_APPEND
*  INTO TABLE @DATA(IT_CKMLRUNPERIOD_APPEND2).
*--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_CKMLRUNPERIOD_APPEND INDEX 1 INTO DATA(WA_CKMLRUNPERIOD_APPEND2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKMLRUNPERIOD_APPEND>-XPOSTING = 1.
<CKMLRUNPERIOD_APPEND>-XCREDITCC = 1.
<CKMLRUNPERIOD_APPEND>-CURTP = 1.
<CKMLRUNPERIOD_APPEND>-AGGREGATION = 1.
<CKMLRUNPERIOD_APPEND>-KOMOK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKMLRUNPERIOD_APPEND-REVAL_CONS, sy-vline,
  WA_CKMLRUNPERIOD_APPEND-XPCP, sy-vline,
  WA_CKMLRUNPERIOD_APPEND-ACC_PRINCIPLE, sy-vline,
  WA_CKMLRUNPERIOD_APPEND-PST_NO_DELTA, sy-vline,
  WA_CKMLRUNPERIOD_APPEND-PRELIMPRICE, sy-vline,
  WA_CKMLRUNPERIOD_APPEND-WITH_SUCC_RUN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKMLRUNPERIOD_APPEND 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_CKMLRUNPERIOD_APPEND 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_CKMLRUNPERIOD_APPEND INTO WA_CKMLRUNPERIOD_APPEND.


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

*Conversion exit ALPHA, internal->external for field CATEGORY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CKMLRUNPERIOD_APPEND-CATEGORY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLRUNPERIOD_APPEND-CATEGORY.
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_CKMLRUNPERIOD_APPEND_STR, 
XPOSTING TYPE STRING,
XCREDITCC TYPE STRING,
CURTP TYPE STRING,
AGGREGATION TYPE STRING,
KOMOK TYPE STRING,
REVAL_CONS TYPE STRING,
XPCP TYPE STRING,
ACC_PRINCIPLE TYPE STRING,
PST_NO_DELTA TYPE STRING,
PRELIMPRICE TYPE STRING,
WITH_SUCC_RUN TYPE STRING,
WRITE_RUNSCALE TYPE STRING,
XCOGM_RUN TYPE STRING,
VALUTYP TYPE STRING,
VALUSUBTYP TYPE STRING,
RUN_REFERENCE TYPE STRING,
REF_TYPE TYPE STRING,
REF_RUN_ID TYPE STRING,
RLDNR TYPE STRING,
LDGRP TYPE STRING,
XREVAL TYPE STRING,
XCOACC TYPE STRING,
XSIMBADI TYPE STRING,
CATEGORY TYPE STRING,
VERSION TYPE STRING,
TMPL_ID TYPE STRING,
DATE_FROM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKMLRUNPERIOD_APPEND_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_CKMLRUNPERIOD_APPEND_STR-XPOSTING sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-XCREDITCC sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-CURTP sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-AGGREGATION sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-KOMOK sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-REVAL_CONS sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-XPCP sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-ACC_PRINCIPLE sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-PST_NO_DELTA sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-PRELIMPRICE sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-WITH_SUCC_RUN sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-WRITE_RUNSCALE sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-XCOGM_RUN sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-VALUTYP sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-VALUSUBTYP sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-RUN_REFERENCE sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-REF_TYPE sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-REF_RUN_ID sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-RLDNR sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-LDGRP sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-XREVAL sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-XCOACC sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-XSIMBADI sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-CATEGORY sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-VERSION sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-TMPL_ID sy-vline 
WA_CKMLRUNPERIOD_APPEND_STR-DATE_FROM sy-vline      INTO ld_text SEPARATED BY SPACE.

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