ABAP Select data from SAP table RDS_CONDITION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RDS_CONDITION
*  INTO TABLE @DATA(IT_RDS_CONDITION2).
*--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_RDS_CONDITION INDEX 1 INTO DATA(WA_RDS_CONDITION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RDS_CONDITION>-OBJECT_ID = 1.
<RDS_CONDITION>-CONDITIONID = 1.
<RDS_CONDITION>-COMPGROUP = 1.
<RDS_CONDITION>-COUNTER = 1.
<RDS_CONDITION>-LEXTRTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RDS_CONDITION-LEXTRVALUE, sy-vline,
  WA_RDS_CONDITION-LEXTRDATATYPE, sy-vline,
  WA_RDS_CONDITION-LEXTRMULTLINE, sy-vline,
  WA_RDS_CONDITION-LEXTRCOBJNS, sy-vline,
  WA_RDS_CONDITION-LEXTRCOBJNAME, sy-vline,
  WA_RDS_CONDITION-REXTRTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RDS_CONDITION 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_RDS_CONDITION 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_RDS_CONDITION INTO WA_RDS_CONDITION.


*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_RDS_CONDITION_STR, 
OBJECT_ID TYPE STRING,
CONDITIONID TYPE STRING,
COMPGROUP TYPE STRING,
COUNTER TYPE STRING,
LEXTRTYPE TYPE STRING,
LEXTRVALUE TYPE STRING,
LEXTRDATATYPE TYPE STRING,
LEXTRMULTLINE TYPE STRING,
LEXTRCOBJNS TYPE STRING,
LEXTRCOBJNAME TYPE STRING,
REXTRTYPE TYPE STRING,
REXTRVALUE TYPE STRING,
REXTRDATATYPE TYPE STRING,
REXTRMULTLINE TYPE STRING,
REXTRCOBJNS TYPE STRING,
REXTRCOBJNAME TYPE STRING,
COMPOP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RDS_CONDITION_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_RDS_CONDITION_STR-OBJECT_ID sy-vline 
WA_RDS_CONDITION_STR-CONDITIONID sy-vline 
WA_RDS_CONDITION_STR-COMPGROUP sy-vline 
WA_RDS_CONDITION_STR-COUNTER sy-vline 
WA_RDS_CONDITION_STR-LEXTRTYPE sy-vline 
WA_RDS_CONDITION_STR-LEXTRVALUE sy-vline 
WA_RDS_CONDITION_STR-LEXTRDATATYPE sy-vline 
WA_RDS_CONDITION_STR-LEXTRMULTLINE sy-vline 
WA_RDS_CONDITION_STR-LEXTRCOBJNS sy-vline 
WA_RDS_CONDITION_STR-LEXTRCOBJNAME sy-vline 
WA_RDS_CONDITION_STR-REXTRTYPE sy-vline 
WA_RDS_CONDITION_STR-REXTRVALUE sy-vline 
WA_RDS_CONDITION_STR-REXTRDATATYPE sy-vline 
WA_RDS_CONDITION_STR-REXTRMULTLINE sy-vline 
WA_RDS_CONDITION_STR-REXTRCOBJNS sy-vline 
WA_RDS_CONDITION_STR-REXTRCOBJNAME sy-vline 
WA_RDS_CONDITION_STR-COMPOP sy-vline      INTO ld_text SEPARATED BY SPACE.

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