ABAP Select data from SAP table CRTMOLOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRTMOLOG
*  INTO TABLE @DATA(IT_CRTMOLOG2).
*--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_CRTMOLOG INDEX 1 INTO DATA(WA_CRTMOLOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRTMOLOG>-MANDT = 1.
<CRTMOLOG>-LOGNUMBER = 1.
<CRTMOLOG>-LOGHANDLE = 1.
<CRTMOLOG>-LOGMESSAGETEXT = 1.
<CRTMOLOG>-APPLICATIONLOGOBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRTMOLOG-APPLICATIONLOGSUBOBJECT, sy-vline,
  WA_CRTMOLOG-ORDERID, sy-vline,
  WA_CRTMOLOG-ORDERDESCRIPTION, sy-vline,
  WA_CRTMOLOG-EVTBSDORDREFTRANSTEXT, sy-vline,
  WA_CRTMOLOG-CREATEDBYUSER, sy-vline,
  WA_CRTMOLOG-CREATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRTMOLOG 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_CRTMOLOG 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_CRTMOLOG INTO WA_CRTMOLOG.


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

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

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CRTMOLOG-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRTMOLOG-MATERIAL.
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_CRTMOLOG_STR, 
MANDT TYPE STRING,
LOGNUMBER TYPE STRING,
LOGHANDLE TYPE STRING,
LOGMESSAGETEXT TYPE STRING,
APPLICATIONLOGOBJECT TYPE STRING,
APPLICATIONLOGSUBOBJECT TYPE STRING,
ORDERID TYPE STRING,
ORDERDESCRIPTION TYPE STRING,
EVTBSDORDREFTRANSTEXT TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
CONTROLLINGAREA TYPE STRING,
COMPANYCODE TYPE STRING,
PLANT TYPE STRING,
PROFITCENTER TYPE STRING,
ORDERTYPE TYPE STRING,
ORDERCATEGORY TYPE STRING,
MATERIAL TYPE STRING,
APPLLOGHIGHESTMESSAGESEVERITY TYPE STRING,
MATERIALNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRTMOLOG_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_CRTMOLOG_STR-MANDT sy-vline 
WA_CRTMOLOG_STR-LOGNUMBER sy-vline 
WA_CRTMOLOG_STR-LOGHANDLE sy-vline 
WA_CRTMOLOG_STR-LOGMESSAGETEXT sy-vline 
WA_CRTMOLOG_STR-APPLICATIONLOGOBJECT sy-vline 
WA_CRTMOLOG_STR-APPLICATIONLOGSUBOBJECT sy-vline 
WA_CRTMOLOG_STR-ORDERID sy-vline 
WA_CRTMOLOG_STR-ORDERDESCRIPTION sy-vline 
WA_CRTMOLOG_STR-EVTBSDORDREFTRANSTEXT sy-vline 
WA_CRTMOLOG_STR-CREATEDBYUSER sy-vline 
WA_CRTMOLOG_STR-CREATIONDATE sy-vline 
WA_CRTMOLOG_STR-CREATIONTIME sy-vline 
WA_CRTMOLOG_STR-CONTROLLINGAREA sy-vline 
WA_CRTMOLOG_STR-COMPANYCODE sy-vline 
WA_CRTMOLOG_STR-PLANT sy-vline 
WA_CRTMOLOG_STR-PROFITCENTER sy-vline 
WA_CRTMOLOG_STR-ORDERTYPE sy-vline 
WA_CRTMOLOG_STR-ORDERCATEGORY sy-vline 
WA_CRTMOLOG_STR-MATERIAL sy-vline 
WA_CRTMOLOG_STR-APPLLOGHIGHESTMESSAGESEVERITY sy-vline 
WA_CRTMOLOG_STR-MATERIALNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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