ABAP Select data from SAP table /PLMI/S_RCP_MIG_MAPPING 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_RCP_MIG_MAPPING 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_RCP_MIG_MAPPING. 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_RCP_MIG_MAPPING 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_RCP_MIG_MAPPING TYPE STANDARD TABLE OF /PLMI/S_RCP_MIG_MAPPING,
      WA_/PLMI/S_RCP_MIG_MAPPING TYPE /PLMI/S_RCP_MIG_MAPPING,
      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_RCP_MIG_MAPPING> TYPE /PLMI/S_RCP_MIG_MAPPING.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PLMI/S_RCP_MIG_MAPPING
*  INTO TABLE @DATA(IT_/PLMI/S_RCP_MIG_MAPPING2).
*--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_RCP_MIG_MAPPING INDEX 1 INTO DATA(WA_/PLMI/S_RCP_MIG_MAPPING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PLMI/S_RCP_MIG_MAPPING>-RCP_NAM = 1.
</PLMI/S_RCP_MIG_MAPPING>-FRML_SUBID = 1.
</PLMI/S_RCP_MIG_MAPPING>-UPDATE_FLAG = 1.
</PLMI/S_RCP_MIG_MAPPING>-IS_LOCKED = 1.
</PLMI/S_RCP_MIG_MAPPING>-STATUS_OLD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PLMI/S_RCP_MIG_MAPPING-MSTATUS, sy-vline,
  WA_/PLMI/S_RCP_MIG_MAPPING-IS_CHANGEABLE, sy-vline,
  WA_/PLMI/S_RCP_MIG_MAPPING-LOAD_INTO, sy-vline,
  WA_/PLMI/S_RCP_MIG_MAPPING-STATUS_CHANGED, sy-vline,
  WA_/PLMI/S_RCP_MIG_MAPPING-PO_SUBID, sy-vline,
  WA_/PLMI/S_RCP_MIG_MAPPING-T_CELLTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PLMI/S_RCP_MIG_MAPPING 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_RCP_MIG_MAPPING 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_RCP_MIG_MAPPING INTO WA_/PLMI/S_RCP_MIG_MAPPING.


*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 CHRI2, internal->external for field FRML_SUBID
CALL FUNCTION 'CONVERSION_EXIT_CHRI2_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCP_MIG_MAPPING-FRML_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCP_MIG_MAPPING-FRML_SUBID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCP_MIG_MAPPING-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCP_MIG_MAPPING-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCP_MIG_MAPPING-ECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCP_MIG_MAPPING-ECN.
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_RCP_MIG_MAPPING_STR, 
RCP_NAM TYPE STRING,
FRML_SUBID TYPE STRING,
UPDATE_FLAG TYPE STRING,
IS_LOCKED TYPE STRING,
STATUS_OLD TYPE STRING,
MSTATUS TYPE STRING,
IS_CHANGEABLE TYPE STRING,
LOAD_INTO TYPE STRING,
STATUS_CHANGED TYPE STRING,
PO_SUBID TYPE STRING,
T_CELLTYPE TYPE STRING,
T_COLOR TYPE STRING,
PNGUID TYPE STRING,
AENNR TYPE STRING,
FRML_LEVEL TYPE STRING,
PNTYPE TYPE STRING,
MIG_GUID TYPE STRING,
RCP_GUID TYPE STRING,
RFO_GUID TYPE STRING,
RPR_GUID TYPE STRING,
SUBRECN TYPE STRING,
ALT_NO TYPE STRING,
VERS_NO TYPE STRING,
RCP_TYPE_ID TYPE STRING,
ECN TYPE STRING,
MIG_KEY_DATE TYPE STRING,
STATUS TYPE STRING,
ERROR TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_TIMESTMP TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_TIMESTMP TYPE STRING,
CREATED_ON TYPE STRING,
CREATED_TIME TYPE STRING,
CHANGED_ON TYPE STRING,
CHANGED_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PLMI/S_RCP_MIG_MAPPING_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_RCP_MIG_MAPPING_STR-RCP_NAM sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-FRML_SUBID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-UPDATE_FLAG sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-IS_LOCKED sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-STATUS_OLD sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-MSTATUS sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-IS_CHANGEABLE sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-LOAD_INTO sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-STATUS_CHANGED sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-PO_SUBID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-T_CELLTYPE sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-T_COLOR sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-PNGUID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-AENNR sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-FRML_LEVEL sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-PNTYPE sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-MIG_GUID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-RCP_GUID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-RFO_GUID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-RPR_GUID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-SUBRECN sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-ALT_NO sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-VERS_NO sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-RCP_TYPE_ID sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-ECN sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-MIG_KEY_DATE sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-STATUS sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-ERROR sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CREATED_BY sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CREATED_TIMESTMP sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CHANGED_BY sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CHANGED_TIMESTMP sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CREATED_ON sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CREATED_TIME sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CHANGED_ON sy-vline 
WA_/PLMI/S_RCP_MIG_MAPPING_STR-CHANGED_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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