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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PLMI/S_RCA_EXPL_RCPSPEC
*  INTO TABLE @DATA(IT_/PLMI/S_RCA_EXPL_RCPSPEC2).
*--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_EXPL_RCPSPEC INDEX 1 INTO DATA(WA_/PLMI/S_RCA_EXPL_RCPSPEC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PLMI/S_RCA_EXPL_RCPSPEC>-RCP_GUID = 1.
</PLMI/S_RCA_EXPL_RCPSPEC>-SUBID = 1.
</PLMI/S_RCA_EXPL_RCPSPEC>-ALT_NO = 1.
</PLMI/S_RCA_EXPL_RCPSPEC>-VERS_NO = 1.
</PLMI/S_RCA_EXPL_RCPSPEC>-SUBRECN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PLMI/S_RCA_EXPL_RCPSPEC-RCP_TYPE_ID, sy-vline,
  WA_/PLMI/S_RCA_EXPL_RCPSPEC-ITEM_GUID, sy-vline,
  WA_/PLMI/S_RCA_EXPL_RCPSPEC-STREAM_ID, sy-vline,
  WA_/PLMI/S_RCA_EXPL_RCPSPEC-ST_ID, sy-vline,
  WA_/PLMI/S_RCA_EXPL_RCPSPEC-POSNR, sy-vline,
  WA_/PLMI/S_RCA_EXPL_RCPSPEC-POSCOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PLMI/S_RCA_EXPL_RCPSPEC 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_EXPL_RCPSPEC 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_EXPL_RCPSPEC INTO WA_/PLMI/S_RCA_EXPL_RCPSPEC.


*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 RCPNZ, internal->external for field ST_ID
CALL FUNCTION 'CONVERSION_EXIT_RCPNZ_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCA_EXPL_RCPSPEC-ST_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCA_EXPL_RCPSPEC-ST_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RCPNZ, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_RCPNZ_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCA_EXPL_RCPSPEC-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCA_EXPL_RCPSPEC-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RCPNZ, internal->external for field POSCOUNT
CALL FUNCTION 'CONVERSION_EXIT_RCPNZ_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCA_EXPL_RCPSPEC-POSCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCA_EXPL_RCPSPEC-POSCOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCA_EXPL_RCPSPEC-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCA_EXPL_RCPSPEC-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCA_EXPL_RCPSPEC-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCA_EXPL_RCPSPEC-UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RCPNZ, internal->external for field STAGE_NO
CALL FUNCTION 'CONVERSION_EXIT_RCPNZ_OUTPUT'
  EXPORTING
    input =                      WA_/PLMI/S_RCA_EXPL_RCPSPEC-STAGE_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMI/S_RCA_EXPL_RCPSPEC-STAGE_NO.
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_EXPL_RCPSPEC_STR, 
RCP_GUID TYPE STRING,
SUBID TYPE STRING,
ALT_NO TYPE STRING,
VERS_NO TYPE STRING,
SUBRECN TYPE STRING,
RCP_TYPE_ID TYPE STRING,
ITEM_GUID TYPE STRING,
STREAM_ID TYPE STRING,
ST_ID TYPE STRING,
POSNR TYPE STRING,
POSCOUNT TYPE STRING,
ITEM_SUBRECN TYPE STRING,
SUBSTANCE TYPE STRING,
MATERIAL TYPE STRING,
COMP_TYPE TYPE STRING,
MASSABSFLOAT TYPE STRING,
QUANTFLOAT TYPE STRING,
UOM TYPE STRING,
STAGE_NO TYPE STRING,
FLG_STD_EXPL TYPE STRING,
EXPL_RCP_GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PLMI/S_RCA_EXPL_RCPSPEC_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_EXPL_RCPSPEC_STR-RCP_GUID sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-SUBID sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-ALT_NO sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-VERS_NO sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-SUBRECN sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-RCP_TYPE_ID sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-ITEM_GUID sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-STREAM_ID sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-ST_ID sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-POSNR sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-POSCOUNT sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-ITEM_SUBRECN sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-SUBSTANCE sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-MATERIAL sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-COMP_TYPE sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-MASSABSFLOAT sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-QUANTFLOAT sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-UOM sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-STAGE_NO sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-FLG_STD_EXPL sy-vline 
WA_/PLMI/S_RCA_EXPL_RCPSPEC_STR-EXPL_RCP_GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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