ABAP Select data from SAP table FCOMC_CATEGORY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FCOMC_CATEGORY
*  INTO TABLE @DATA(IT_FCOMC_CATEGORY2).
*--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_FCOMC_CATEGORY INDEX 1 INTO DATA(WA_FCOMC_CATEGORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FCOMC_CATEGORY>-MANDT = 1.
<FCOMC_CATEGORY>-CATEGORY = 1.
<FCOMC_CATEGORY>-FXDIFFOL = 1.
<FCOMC_CATEGORY>-FXSRCCAT = 1.
<FCOMC_CATEGORY>-OPECAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FCOMC_CATEGORY-OPEYEAR, sy-vline,
  WA_FCOMC_CATEGORY-OPEPER, sy-vline,
  WA_FCOMC_CATEGORY-RATECAT, sy-vline,
  WA_FCOMC_CATEGORY-RATEYEAR, sy-vline,
  WA_FCOMC_CATEGORY-RATEPER, sy-vline,
  WA_FCOMC_CATEGORY-OWNCAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FCOMC_CATEGORY 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_FCOMC_CATEGORY 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_FCOMC_CATEGORY INTO WA_FCOMC_CATEGORY.


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

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

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

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

*Conversion exit ALPHA, internal->external for field OWNCAT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOMC_CATEGORY-OWNCAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOMC_CATEGORY-OWNCAT.
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_FCOMC_CATEGORY_STR, 
MANDT TYPE STRING,
CATEGORY TYPE STRING,
FXDIFFOL TYPE STRING,
FXSRCCAT TYPE STRING,
OPECAT TYPE STRING,
OPEYEAR TYPE STRING,
OPEPER TYPE STRING,
RATECAT TYPE STRING,
RATEYEAR TYPE STRING,
RATEPER TYPE STRING,
OWNCAT TYPE STRING,
OWNYEAR TYPE STRING,
OWNPER TYPE STRING,
DIMLIST TYPE STRING,
ENABLEJNR TYPE STRING,
DATA_SUBMIT TYPE STRING,
KURST TYPE STRING,
APPLICATION_TYPE TYPE STRING,
BASELINE TYPE STRING,
ONGOING TYPE STRING,
PLANORD TYPE STRING,
PREPLANORD TYPE STRING,
PREDICTION TYPE STRING,
UPLOAD_ALLOWED TYPE STRING,
COPY_ALLOWED TYPE STRING,
DELETE_ALLOWED TYPE STRING,
CATEGORY_USAGE TYPE STRING,
AVAILABILITY_CONTROL TYPE STRING,
BUDGET_CONSISTENCY_CHECK TYPE STRING,
PM_ORDER_ESTIMATED_COST TYPE STRING,
PM_ORDER_PLANNED_COST TYPE STRING,
PM_ORDER_BASELINE_PLANNED_COST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FCOMC_CATEGORY_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_FCOMC_CATEGORY_STR-MANDT sy-vline 
WA_FCOMC_CATEGORY_STR-CATEGORY sy-vline 
WA_FCOMC_CATEGORY_STR-FXDIFFOL sy-vline 
WA_FCOMC_CATEGORY_STR-FXSRCCAT sy-vline 
WA_FCOMC_CATEGORY_STR-OPECAT sy-vline 
WA_FCOMC_CATEGORY_STR-OPEYEAR sy-vline 
WA_FCOMC_CATEGORY_STR-OPEPER sy-vline 
WA_FCOMC_CATEGORY_STR-RATECAT sy-vline 
WA_FCOMC_CATEGORY_STR-RATEYEAR sy-vline 
WA_FCOMC_CATEGORY_STR-RATEPER sy-vline 
WA_FCOMC_CATEGORY_STR-OWNCAT sy-vline 
WA_FCOMC_CATEGORY_STR-OWNYEAR sy-vline 
WA_FCOMC_CATEGORY_STR-OWNPER sy-vline 
WA_FCOMC_CATEGORY_STR-DIMLIST sy-vline 
WA_FCOMC_CATEGORY_STR-ENABLEJNR sy-vline 
WA_FCOMC_CATEGORY_STR-DATA_SUBMIT sy-vline 
WA_FCOMC_CATEGORY_STR-KURST sy-vline 
WA_FCOMC_CATEGORY_STR-APPLICATION_TYPE sy-vline 
WA_FCOMC_CATEGORY_STR-BASELINE sy-vline 
WA_FCOMC_CATEGORY_STR-ONGOING sy-vline 
WA_FCOMC_CATEGORY_STR-PLANORD sy-vline 
WA_FCOMC_CATEGORY_STR-PREPLANORD sy-vline 
WA_FCOMC_CATEGORY_STR-PREDICTION sy-vline 
WA_FCOMC_CATEGORY_STR-UPLOAD_ALLOWED sy-vline 
WA_FCOMC_CATEGORY_STR-COPY_ALLOWED sy-vline 
WA_FCOMC_CATEGORY_STR-DELETE_ALLOWED sy-vline 
WA_FCOMC_CATEGORY_STR-CATEGORY_USAGE sy-vline 
WA_FCOMC_CATEGORY_STR-AVAILABILITY_CONTROL sy-vline 
WA_FCOMC_CATEGORY_STR-BUDGET_CONSISTENCY_CHECK sy-vline 
WA_FCOMC_CATEGORY_STR-PM_ORDER_ESTIMATED_COST sy-vline 
WA_FCOMC_CATEGORY_STR-PM_ORDER_PLANNED_COST sy-vline 
WA_FCOMC_CATEGORY_STR-PM_ORDER_BASELINE_PLANNED_COST sy-vline      INTO ld_text SEPARATED BY SPACE.

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