ABAP Select data from SAP table RIQMEL_LIST_CHARACTERISTIC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RIQMEL_LIST_CHARACTERISTIC
*  INTO TABLE @DATA(IT_RIQMEL_LIST_CHARACTERISTIC2).
*--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_RIQMEL_LIST_CHARACTERISTIC INDEX 1 INTO DATA(WA_RIQMEL_LIST_CHARACTERISTIC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RIQMEL_LIST_CHARACTERISTIC>-CLDA1 = 1.
<RIQMEL_LIST_CHARACTERISTIC>-CLDA2 = 1.
<RIQMEL_LIST_CHARACTERISTIC>-CLDA3 = 1.
<RIQMEL_LIST_CHARACTERISTIC>-CLDA4 = 1.
<RIQMEL_LIST_CHARACTERISTIC>-CLDA5 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RIQMEL_LIST_CHARACTERISTIC-CLDA6, sy-vline,
  WA_RIQMEL_LIST_CHARACTERISTIC-CLDA7, sy-vline,
  WA_RIQMEL_LIST_CHARACTERISTIC-CLDA8, sy-vline,
  WA_RIQMEL_LIST_CHARACTERISTIC-CLDA9, sy-vline,
  WA_RIQMEL_LIST_CHARACTERISTIC-CLDA10, sy-vline,
  WA_RIQMEL_LIST_CHARACTERISTIC-CLDA11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RIQMEL_LIST_CHARACTERISTIC 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_RIQMEL_LIST_CHARACTERISTIC 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_RIQMEL_LIST_CHARACTERISTIC INTO WA_RIQMEL_LIST_CHARACTERISTIC.


*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_RIQMEL_LIST_CHARACTERISTIC_STR, 
CLDA1 TYPE STRING,
CLDA2 TYPE STRING,
CLDA3 TYPE STRING,
CLDA4 TYPE STRING,
CLDA5 TYPE STRING,
CLDA6 TYPE STRING,
CLDA7 TYPE STRING,
CLDA8 TYPE STRING,
CLDA9 TYPE STRING,
CLDA10 TYPE STRING,
CLDA11 TYPE STRING,
CLDA12 TYPE STRING,
CLDA13 TYPE STRING,
CLDA14 TYPE STRING,
CLDA15 TYPE STRING,
CLDA16 TYPE STRING,
CLDA17 TYPE STRING,
CLDA18 TYPE STRING,
CLDA19 TYPE STRING,
CLDA20 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RIQMEL_LIST_CHARACTERISTIC_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_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA1 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA2 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA3 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA4 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA5 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA6 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA7 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA8 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA9 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA10 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA11 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA12 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA13 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA14 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA15 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA16 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA17 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA18 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA19 sy-vline 
WA_RIQMEL_LIST_CHARACTERISTIC_STR-CLDA20 sy-vline      INTO ld_text SEPARATED BY SPACE.

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