ABAP Select data from SAP table CMAC_FEE_DISPLAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMAC_FEE_DISPLAY
*  INTO TABLE @DATA(IT_CMAC_FEE_DISPLAY2).
*--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_CMAC_FEE_DISPLAY INDEX 1 INTO DATA(WA_CMAC_FEE_DISPLAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMAC_FEE_DISPLAY>-FSTEP = 1.
<CMAC_FEE_DISPLAY>-FSTEPT = 1.
<CMAC_FEE_DISPLAY>-FCALCRULE = 1.
<CMAC_FEE_DISPLAY>-FCALCRULET = 1.
<CMAC_FEE_DISPLAY>-PRIPROC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMAC_FEE_DISPLAY-OTYPE, sy-vline,
  WA_CMAC_FEE_DISPLAY-OTYPET, sy-vline,
  WA_CMAC_FEE_DISPLAY-CURRKEY, sy-vline,
  WA_CMAC_FEE_DISPLAY-PERNO, sy-vline,
  WA_CMAC_FEE_DISPLAY-PERIND, sy-vline,
  WA_CMAC_FEE_DISPLAY-TIMELIMITUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMAC_FEE_DISPLAY 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_CMAC_FEE_DISPLAY 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_CMAC_FEE_DISPLAY INTO WA_CMAC_FEE_DISPLAY.


*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_CMAC_FEE_DISPLAY_STR, 
FSTEP TYPE STRING,
FSTEPT TYPE STRING,
FCALCRULE TYPE STRING,
FCALCRULET TYPE STRING,
PRIPROC TYPE STRING,
OTYPE TYPE STRING,
OTYPET TYPE STRING,
CURRKEY TYPE STRING,
PERNO TYPE STRING,
PERIND TYPE STRING,
TIMELIMITUP TYPE STRING,
CALID TYPE STRING,
OVPERIOD TYPE STRING,
ENDPROC TYPE STRING,
PNTME TYPE STRING,
PNTUP TYPE STRING,
PNTDOWN TYPE STRING,
PNTNEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMAC_FEE_DISPLAY_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_CMAC_FEE_DISPLAY_STR-FSTEP sy-vline 
WA_CMAC_FEE_DISPLAY_STR-FSTEPT sy-vline 
WA_CMAC_FEE_DISPLAY_STR-FCALCRULE sy-vline 
WA_CMAC_FEE_DISPLAY_STR-FCALCRULET sy-vline 
WA_CMAC_FEE_DISPLAY_STR-PRIPROC sy-vline 
WA_CMAC_FEE_DISPLAY_STR-OTYPE sy-vline 
WA_CMAC_FEE_DISPLAY_STR-OTYPET sy-vline 
WA_CMAC_FEE_DISPLAY_STR-CURRKEY sy-vline 
WA_CMAC_FEE_DISPLAY_STR-PERNO sy-vline 
WA_CMAC_FEE_DISPLAY_STR-PERIND sy-vline 
WA_CMAC_FEE_DISPLAY_STR-TIMELIMITUP sy-vline 
WA_CMAC_FEE_DISPLAY_STR-CALID sy-vline 
WA_CMAC_FEE_DISPLAY_STR-OVPERIOD sy-vline 
WA_CMAC_FEE_DISPLAY_STR-ENDPROC sy-vline 
WA_CMAC_FEE_DISPLAY_STR-PNTME sy-vline 
WA_CMAC_FEE_DISPLAY_STR-PNTUP sy-vline 
WA_CMAC_FEE_DISPLAY_STR-PNTDOWN sy-vline 
WA_CMAC_FEE_DISPLAY_STR-PNTNEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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