ABAP Select data from SAP table /SAPMP/RC_T001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPMP/RC_T001 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 /SAPMP/RC_T001. 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 /SAPMP/RC_T001 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_/SAPMP/RC_T001 TYPE STANDARD TABLE OF /SAPMP/RC_T001,
      WA_/SAPMP/RC_T001 TYPE /SAPMP/RC_T001,
      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: </SAPMP/RC_T001> TYPE /SAPMP/RC_T001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPMP/RC_T001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPMP/RC_T001
  INTO TABLE IT_/SAPMP/RC_T001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPMP/RC_T001
*  INTO TABLE @DATA(IT_/SAPMP/RC_T0012).
*--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_/SAPMP/RC_T001 INDEX 1 INTO DATA(WA_/SAPMP/RC_T0012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPMP/RC_T001 ASSIGNING </SAPMP/RC_T001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPMP/RC_T001>-MANDT = 1.
</SAPMP/RC_T001>-WERKS = 1.
</SAPMP/RC_T001>-PTOLOFF = 1.
</SAPMP/RC_T001>-ULCAL = 1.
</SAPMP/RC_T001>-UDCAL = 1.

ENDLOOP.

LOOP AT IT_/SAPMP/RC_T001 INTO WA_/SAPMP/RC_T001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPMP/RC_T001-UWCAL, sy-vline,
  WA_/SAPMP/RC_T001-ROFNVL, sy-vline,
  WA_/SAPMP/RC_T001-PCDRFT, sy-vline,
  WA_/SAPMP/RC_T001-FCDVL, sy-vline,
  WA_/SAPMP/RC_T001-NAWFA, sy-vline,
  WA_/SAPMP/RC_T001-CDMLT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPMP/RC_T001 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_/SAPMP/RC_T001 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_/SAPMP/RC_T001 INTO WA_/SAPMP/RC_T001.


*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 ULCAL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/RC_T001-ULCAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/RC_T001-ULCAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UDCAL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/RC_T001-UDCAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/RC_T001-UDCAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UWCAL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/RC_T001-UWCAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/RC_T001-UWCAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field RETYP_C
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/RC_T001-RETYP_C
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/RC_T001-RETYP_C.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNMAL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/RC_T001-UNMAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/RC_T001-UNMAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNMAW
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/RC_T001-UNMAW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/RC_T001-UNMAW.
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_/SAPMP/RC_T001_STR, 
MANDT TYPE STRING,
WERKS TYPE STRING,
PTOLOFF TYPE STRING,
ULCAL TYPE STRING,
UDCAL TYPE STRING,
UWCAL TYPE STRING,
ROFNVL TYPE STRING,
PCDRFT TYPE STRING,
FCDVL TYPE STRING,
NAWFA TYPE STRING,
CDMLT TYPE STRING,
CLGT1 TYPE STRING,
CDMGE TYPE STRING,
CLGT2 TYPE STRING,
RECAT_C TYPE STRING,
RETYP_C TYPE STRING,
VTNAM TYPE STRING,
MAXLN TYPE STRING,
UNMAL TYPE STRING,
MAXWE TYPE STRING,
UNMAW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPMP/RC_T001_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_/SAPMP/RC_T001_STR-MANDT sy-vline 
WA_/SAPMP/RC_T001_STR-WERKS sy-vline 
WA_/SAPMP/RC_T001_STR-PTOLOFF sy-vline 
WA_/SAPMP/RC_T001_STR-ULCAL sy-vline 
WA_/SAPMP/RC_T001_STR-UDCAL sy-vline 
WA_/SAPMP/RC_T001_STR-UWCAL sy-vline 
WA_/SAPMP/RC_T001_STR-ROFNVL sy-vline 
WA_/SAPMP/RC_T001_STR-PCDRFT sy-vline 
WA_/SAPMP/RC_T001_STR-FCDVL sy-vline 
WA_/SAPMP/RC_T001_STR-NAWFA sy-vline 
WA_/SAPMP/RC_T001_STR-CDMLT sy-vline 
WA_/SAPMP/RC_T001_STR-CLGT1 sy-vline 
WA_/SAPMP/RC_T001_STR-CDMGE sy-vline 
WA_/SAPMP/RC_T001_STR-CLGT2 sy-vline 
WA_/SAPMP/RC_T001_STR-RECAT_C sy-vline 
WA_/SAPMP/RC_T001_STR-RETYP_C sy-vline 
WA_/SAPMP/RC_T001_STR-VTNAM sy-vline 
WA_/SAPMP/RC_T001_STR-MAXLN sy-vline 
WA_/SAPMP/RC_T001_STR-UNMAL sy-vline 
WA_/SAPMP/RC_T001_STR-MAXWE sy-vline 
WA_/SAPMP/RC_T001_STR-UNMAW sy-vline      INTO ld_text SEPARATED BY SPACE.

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