ABAP Select data from SAP table /PLMI/S_RCA_BUFFER_PARAM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PLMI/S_RCA_BUFFER_PARAM 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 /PLMI/S_RCA_BUFFER_PARAM. 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 /PLMI/S_RCA_BUFFER_PARAM 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_/PLMI/S_RCA_BUFFER_PARAM TYPE STANDARD TABLE OF /PLMI/S_RCA_BUFFER_PARAM,
      WA_/PLMI/S_RCA_BUFFER_PARAM TYPE /PLMI/S_RCA_BUFFER_PARAM,
      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: </PLMI/S_RCA_BUFFER_PARAM> TYPE /PLMI/S_RCA_BUFFER_PARAM.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PLMI/S_RCA_BUFFER_PARAM
  INTO TABLE IT_/PLMI/S_RCA_BUFFER_PARAM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PLMI/S_RCA_BUFFER_PARAM
*  INTO TABLE @DATA(IT_/PLMI/S_RCA_BUFFER_PARAM2).
*--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_/PLMI/S_RCA_BUFFER_PARAM INDEX 1 INTO DATA(WA_/PLMI/S_RCA_BUFFER_PARAM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PLMI/S_RCA_BUFFER_PARAM ASSIGNING </PLMI/S_RCA_BUFFER_PARAM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PLMI/S_RCA_BUFFER_PARAM>-PROP_CLASS = 1.
</PLMI/S_RCA_BUFFER_PARAM>-RCP_GUID = 1.
</PLMI/S_RCA_BUFFER_PARAM>-ID = 1.
</PLMI/S_RCA_BUFFER_PARAM>-KEY_DATE = 1.
</PLMI/S_RCA_BUFFER_PARAM>-STATUS = 1.

ENDLOOP.

LOOP AT IT_/PLMI/S_RCA_BUFFER_PARAM INTO WA_/PLMI/S_RCA_BUFFER_PARAM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PLMI/S_RCA_BUFFER_PARAM-RCP_USAGE, sy-vline,
  WA_/PLMI/S_RCA_BUFFER_PARAM-PLANT, sy-vline,
  WA_/PLMI/S_RCA_BUFFER_PARAM-CLEAR_BUFFER, sy-vline,
  WA_/PLMI/S_RCA_BUFFER_PARAM-QUANTITY, sy-vline,
  WA_/PLMI/S_RCA_BUFFER_PARAM-UOM, sy-vline,
  WA_/PLMI/S_RCA_BUFFER_PARAM-START_RCP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PLMI/S_RCA_BUFFER_PARAM 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_/PLMI/S_RCA_BUFFER_PARAM 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_/PLMI/S_RCA_BUFFER_PARAM INTO WA_/PLMI/S_RCA_BUFFER_PARAM.


*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 CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCA_BUFFER_PARAM-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCA_BUFFER_PARAM-UOM.
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_/PLMI/S_RCA_BUFFER_PARAM_STR, 
PROP_CLASS TYPE STRING,
RCP_GUID TYPE STRING,
ID TYPE STRING,
KEY_DATE TYPE STRING,
STATUS TYPE STRING,
RCP_USAGE TYPE STRING,
PLANT TYPE STRING,
CLEAR_BUFFER TYPE STRING,
QUANTITY TYPE STRING,
UOM TYPE STRING,
START_RCP TYPE STRING,
SUBID TYPE STRING,
ALT_NO TYPE STRING,
VERS_NO TYPE STRING,
SUBRECN TYPE STRING,
FLEX_PARAM TYPE STRING,
RCP_MDL_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PLMI/S_RCA_BUFFER_PARAM_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_/PLMI/S_RCA_BUFFER_PARAM_STR-PROP_CLASS sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-RCP_GUID sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-ID sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-KEY_DATE sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-STATUS sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-RCP_USAGE sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-PLANT sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-CLEAR_BUFFER sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-QUANTITY sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-UOM sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-START_RCP sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-SUBID sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-ALT_NO sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-VERS_NO sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-SUBRECN sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-FLEX_PARAM sy-vline 
WA_/PLMI/S_RCA_BUFFER_PARAM_STR-RCP_MDL_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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