ABAP Select data from SAP table CMPSTNHISTORY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMPSTNHISTORY
*  INTO TABLE @DATA(IT_CMPSTNHISTORY2).
*--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_CMPSTNHISTORY INDEX 1 INTO DATA(WA_CMPSTNHISTORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMPSTNHISTORY>-MANDT = 1.
<CMPSTNHISTORY>-CHMLCOMPOSITIONUUID = 1.
<CMPSTNHISTORY>-CHMLCMPLNCINFOUUID = 1.
<CMPSTNHISTORY>-CREATIONUTCDATETIME = 1.
<CMPSTNHISTORY>-CHMLCOMPOSITIONTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMPSTNHISTORY-CHMLCOMPOSITIONTYPENAME, sy-vline,
  WA_CMPSTNHISTORY-CHMLCOMPOSITIONSTATUS, sy-vline,
  WA_CMPSTNHISTORY-CHMLCOMPOSITIONSTATUSNAME, sy-vline,
  WA_CMPSTNHISTORY-LASTCHANGEDBYUSERFULLNAME, sy-vline,
  WA_CMPSTNHISTORY-LASTCHANGEDATETIME, sy-vline,
  WA_CMPSTNHISTORY-RELEASEDBYUSERNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMPSTNHISTORY 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_CMPSTNHISTORY 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_CMPSTNHISTORY INTO WA_CMPSTNHISTORY.


*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_CMPSTNHISTORY_STR, 
MANDT TYPE STRING,
CHMLCOMPOSITIONUUID TYPE STRING,
CHMLCMPLNCINFOUUID TYPE STRING,
CREATIONUTCDATETIME TYPE STRING,
CHMLCOMPOSITIONTYPE TYPE STRING,
CHMLCOMPOSITIONTYPENAME TYPE STRING,
CHMLCOMPOSITIONSTATUS TYPE STRING,
CHMLCOMPOSITIONSTATUSNAME TYPE STRING,
LASTCHANGEDBYUSERFULLNAME TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
RELEASEDBYUSERNAME TYPE STRING,
RELEASEDATETIME TYPE STRING,
VALIDITYSTARTDATETIME TYPE STRING,
VALIDITYENDDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMPSTNHISTORY_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_CMPSTNHISTORY_STR-MANDT sy-vline 
WA_CMPSTNHISTORY_STR-CHMLCOMPOSITIONUUID sy-vline 
WA_CMPSTNHISTORY_STR-CHMLCMPLNCINFOUUID sy-vline 
WA_CMPSTNHISTORY_STR-CREATIONUTCDATETIME sy-vline 
WA_CMPSTNHISTORY_STR-CHMLCOMPOSITIONTYPE sy-vline 
WA_CMPSTNHISTORY_STR-CHMLCOMPOSITIONTYPENAME sy-vline 
WA_CMPSTNHISTORY_STR-CHMLCOMPOSITIONSTATUS sy-vline 
WA_CMPSTNHISTORY_STR-CHMLCOMPOSITIONSTATUSNAME sy-vline 
WA_CMPSTNHISTORY_STR-LASTCHANGEDBYUSERFULLNAME sy-vline 
WA_CMPSTNHISTORY_STR-LASTCHANGEDATETIME sy-vline 
WA_CMPSTNHISTORY_STR-RELEASEDBYUSERNAME sy-vline 
WA_CMPSTNHISTORY_STR-RELEASEDATETIME sy-vline 
WA_CMPSTNHISTORY_STR-VALIDITYSTARTDATETIME sy-vline 
WA_CMPSTNHISTORY_STR-VALIDITYENDDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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