ABAP Select data from SAP table CNFA_PARAMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNFA_PARAMS
*  INTO TABLE @DATA(IT_CNFA_PARAMS2).
*--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_CNFA_PARAMS INDEX 1 INTO DATA(WA_CNFA_PARAMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNFA_PARAMS>-I_FLG_KEYS = 1.
<CNFA_PARAMS>-I_FLG_FIELDS = 1.
<CNFA_PARAMS>-I_FLG_UNITS = 1.
<CNFA_PARAMS>-I_FLG_LENGTH = 1.
<CNFA_PARAMS>-I_FLG_FORMAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNFA_PARAMS-I_FLG_SORT, sy-vline,
  WA_CNFA_PARAMS-I_FLG_AGGREGATION, sy-vline,
  WA_CNFA_PARAMS-I_FLG_GROUPING, sy-vline,
  WA_CNFA_PARAMS-I_FLG_SORT_DOWN, sy-vline,
  WA_CNFA_PARAMS-I_FLG_RANGES, sy-vline,
  WA_CNFA_PARAMS-I_FLG_GROUPS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNFA_PARAMS 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_CNFA_PARAMS 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_CNFA_PARAMS INTO WA_CNFA_PARAMS.


*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_CNFA_PARAMS_STR, 
I_FLG_KEYS TYPE STRING,
I_FLG_FIELDS TYPE STRING,
I_FLG_UNITS TYPE STRING,
I_FLG_LENGTH TYPE STRING,
I_FLG_FORMAT TYPE STRING,
I_FLG_SORT TYPE STRING,
I_FLG_AGGREGATION TYPE STRING,
I_FLG_GROUPING TYPE STRING,
I_FLG_SORT_DOWN TYPE STRING,
I_FLG_RANGES TYPE STRING,
I_FLG_GROUPS TYPE STRING,
I_MIN_NUMBER TYPE STRING,
I_MAX_NUMBER TYPE STRING,
I_LOCKED_NUMBER TYPE STRING,
I_MAX_LENGTH TYPE STRING,
I_DEFAULT_FIELD_LENGTH TYPE STRING,
I_FORM_FOR_LENGTH TYPE STRING,
I_PROGRAM_FOR_LENGTH TYPE STRING,
I_TITLE TYPE STRING,
I_FIELD_NAME TYPE STRING,
I_FIELDS_NAME TYPE STRING,
I_BUTTON_1 TYPE STRING,
TEXT TYPE STRING,
ICON_ID TYPE STRING,
ICON_TEXT TYPE STRING,
QUICKINFO TYPE STRING,
PATH TYPE STRING,
I_BUTTON_2 TYPE STRING,
TEXT TYPE STRING,
ICON_ID TYPE STRING,
ICON_TEXT TYPE STRING,
QUICKINFO TYPE STRING,
PATH TYPE STRING,
I_BUTTON_GET TYPE STRING,
TEXT TYPE STRING,
ICON_ID TYPE STRING,
ICON_TEXT TYPE STRING,
QUICKINFO TYPE STRING,
PATH TYPE STRING,
I_BUTTON_SAVE TYPE STRING,
TEXT TYPE STRING,
ICON_ID TYPE STRING,
ICON_TEXT TYPE STRING,
QUICKINFO TYPE STRING,
PATH TYPE STRING,
I_BUTTON_SHOW TYPE STRING,
TEXT TYPE STRING,
ICON_ID TYPE STRING,
ICON_TEXT TYPE STRING,
QUICKINFO TYPE STRING,
PATH TYPE STRING,
I_BUTTON_DEL TYPE STRING,
TEXT TYPE STRING,
ICON_ID TYPE STRING,
ICON_TEXT TYPE STRING,
QUICKINFO TYPE STRING,
PATH TYPE STRING,
I_EXIT_FORM_1 TYPE STRING,
I_EXIT_FORM_2 TYPE STRING,
I_EXIT_FORM_GET TYPE STRING,
I_EXIT_FORM_SAVE TYPE STRING,
I_EXIT_FORM_SHOW TYPE STRING,
I_EXIT_FORM_DEL TYPE STRING,
I_EXIT_PROGRAM TYPE STRING,
T_ACTUAL_FIELDS TYPE STRING,
T_ACTUAL_RANGES TYPE STRING,
T_ALL_FIELDS TYPE STRING,
T_INCL_FIELDS TYPE STRING,
T_EXCL_FIELDS TYPE STRING,
T_GROUPS TYPE STRING,
E_FLG_BUTTON_1_PRESSED TYPE STRING,
E_FLG_BUTTON_2_PRESSED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNFA_PARAMS_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_CNFA_PARAMS_STR-I_FLG_KEYS sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_FIELDS sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_UNITS sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_LENGTH sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_FORMAT sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_SORT sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_AGGREGATION sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_GROUPING sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_SORT_DOWN sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_RANGES sy-vline 
WA_CNFA_PARAMS_STR-I_FLG_GROUPS sy-vline 
WA_CNFA_PARAMS_STR-I_MIN_NUMBER sy-vline 
WA_CNFA_PARAMS_STR-I_MAX_NUMBER sy-vline 
WA_CNFA_PARAMS_STR-I_LOCKED_NUMBER sy-vline 
WA_CNFA_PARAMS_STR-I_MAX_LENGTH sy-vline 
WA_CNFA_PARAMS_STR-I_DEFAULT_FIELD_LENGTH sy-vline 
WA_CNFA_PARAMS_STR-I_FORM_FOR_LENGTH sy-vline 
WA_CNFA_PARAMS_STR-I_PROGRAM_FOR_LENGTH sy-vline 
WA_CNFA_PARAMS_STR-I_TITLE sy-vline 
WA_CNFA_PARAMS_STR-I_FIELD_NAME sy-vline 
WA_CNFA_PARAMS_STR-I_FIELDS_NAME sy-vline 
WA_CNFA_PARAMS_STR-I_BUTTON_1 sy-vline 
WA_CNFA_PARAMS_STR-TEXT sy-vline 
WA_CNFA_PARAMS_STR-ICON_ID sy-vline 
WA_CNFA_PARAMS_STR-ICON_TEXT sy-vline 
WA_CNFA_PARAMS_STR-QUICKINFO sy-vline 
WA_CNFA_PARAMS_STR-PATH sy-vline 
WA_CNFA_PARAMS_STR-I_BUTTON_2 sy-vline 
WA_CNFA_PARAMS_STR-TEXT sy-vline 
WA_CNFA_PARAMS_STR-ICON_ID sy-vline 
WA_CNFA_PARAMS_STR-ICON_TEXT sy-vline 
WA_CNFA_PARAMS_STR-QUICKINFO sy-vline 
WA_CNFA_PARAMS_STR-PATH sy-vline 
WA_CNFA_PARAMS_STR-I_BUTTON_GET sy-vline 
WA_CNFA_PARAMS_STR-TEXT sy-vline 
WA_CNFA_PARAMS_STR-ICON_ID sy-vline 
WA_CNFA_PARAMS_STR-ICON_TEXT sy-vline 
WA_CNFA_PARAMS_STR-QUICKINFO sy-vline 
WA_CNFA_PARAMS_STR-PATH sy-vline 
WA_CNFA_PARAMS_STR-I_BUTTON_SAVE sy-vline 
WA_CNFA_PARAMS_STR-TEXT sy-vline 
WA_CNFA_PARAMS_STR-ICON_ID sy-vline 
WA_CNFA_PARAMS_STR-ICON_TEXT sy-vline 
WA_CNFA_PARAMS_STR-QUICKINFO sy-vline 
WA_CNFA_PARAMS_STR-PATH sy-vline 
WA_CNFA_PARAMS_STR-I_BUTTON_SHOW sy-vline 
WA_CNFA_PARAMS_STR-TEXT sy-vline 
WA_CNFA_PARAMS_STR-ICON_ID sy-vline 
WA_CNFA_PARAMS_STR-ICON_TEXT sy-vline 
WA_CNFA_PARAMS_STR-QUICKINFO sy-vline 
WA_CNFA_PARAMS_STR-PATH sy-vline 
WA_CNFA_PARAMS_STR-I_BUTTON_DEL sy-vline 
WA_CNFA_PARAMS_STR-TEXT sy-vline 
WA_CNFA_PARAMS_STR-ICON_ID sy-vline 
WA_CNFA_PARAMS_STR-ICON_TEXT sy-vline 
WA_CNFA_PARAMS_STR-QUICKINFO sy-vline 
WA_CNFA_PARAMS_STR-PATH sy-vline 
WA_CNFA_PARAMS_STR-I_EXIT_FORM_1 sy-vline 
WA_CNFA_PARAMS_STR-I_EXIT_FORM_2 sy-vline 
WA_CNFA_PARAMS_STR-I_EXIT_FORM_GET sy-vline 
WA_CNFA_PARAMS_STR-I_EXIT_FORM_SAVE sy-vline 
WA_CNFA_PARAMS_STR-I_EXIT_FORM_SHOW sy-vline 
WA_CNFA_PARAMS_STR-I_EXIT_FORM_DEL sy-vline 
WA_CNFA_PARAMS_STR-I_EXIT_PROGRAM sy-vline 
WA_CNFA_PARAMS_STR-T_ACTUAL_FIELDS sy-vline 
WA_CNFA_PARAMS_STR-T_ACTUAL_RANGES sy-vline 
WA_CNFA_PARAMS_STR-T_ALL_FIELDS sy-vline 
WA_CNFA_PARAMS_STR-T_INCL_FIELDS sy-vline 
WA_CNFA_PARAMS_STR-T_EXCL_FIELDS sy-vline 
WA_CNFA_PARAMS_STR-T_GROUPS sy-vline 
WA_CNFA_PARAMS_STR-E_FLG_BUTTON_1_PRESSED sy-vline 
WA_CNFA_PARAMS_STR-E_FLG_BUTTON_2_PRESSED sy-vline      INTO ld_text SEPARATED BY SPACE.

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