ABAP Select data from SAP table /MRSS/T_RM_VARNT_SEARCH_INPUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MRSS/T_RM_VARNT_SEARCH_INPUT
*  INTO TABLE @DATA(IT_/MRSS/T_RM_VARNT_SEARCH_INPUT2).
*--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_/MRSS/T_RM_VARNT_SEARCH_INPUT INDEX 1 INTO DATA(WA_/MRSS/T_RM_VARNT_SEARCH_INPUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MRSS/T_RM_VARNT_SEARCH_INPUT>-SEARCH_PARAMS = 1.
</MRSS/T_RM_VARNT_SEARCH_INPUT>-PROF_GUID = 1.
</MRSS/T_RM_VARNT_SEARCH_INPUT>-ORG_UNITS = 1.
</MRSS/T_RM_VARNT_SEARCH_INPUT>-RESOURCES = 1.
</MRSS/T_RM_VARNT_SEARCH_INPUT>-BEGDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-PRESEL_VAL, sy-vline,
  WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-NO_OF_CAND, sy-vline,
  WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-FUZZY, sy-vline,
  WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-AVAIL_TYPE, sy-vline,
  WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-VIEW_TYPE, sy-vline,
  WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-DURATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MRSS/T_RM_VARNT_SEARCH_INPUT 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_/MRSS/T_RM_VARNT_SEARCH_INPUT 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_/MRSS/T_RM_VARNT_SEARCH_INPUT INTO WA_/MRSS/T_RM_VARNT_SEARCH_INPUT.


*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 DURATION_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-DURATION_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-DURATION_UNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit PFKEY, internal->external for field PROFILE_KEY
CALL FUNCTION 'CONVERSION_EXIT_PFKEY_OUTPUT'
  EXPORTING
    input =                      WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-PROFILE_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MRSS/T_RM_VARNT_SEARCH_INPUT-PROFILE_KEY.
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_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR, 
SEARCH_PARAMS TYPE STRING,
PROF_GUID TYPE STRING,
ORG_UNITS TYPE STRING,
RESOURCES TYPE STRING,
BEGDA TYPE STRING,
PRESEL_VAL TYPE STRING,
NO_OF_CAND TYPE STRING,
FUZZY TYPE STRING,
AVAIL_TYPE TYPE STRING,
VIEW_TYPE TYPE STRING,
DURATION TYPE STRING,
DURATION_UNIT TYPE STRING,
SRCH_VIEW_TYPE TYPE STRING,
DEM_START TYPE STRING,
DEM_END TYPE STRING,
DEM_DUR TYPE STRING,
DEM_DUR_UNIT TYPE STRING,
DEM_BASED_SEARCH TYPE STRING,
PROFILE_GUID TYPE STRING,
CONS_MGNR TYPE STRING,
QUAL_FLG TYPE STRING,
AVAIL_FLG TYPE STRING,
QUAL_THRS TYPE STRING,
AVAIL_THRS TYPE STRING,
PROFILE_KEY TYPE STRING,
CAND_SELOPT TYPE STRING,
CONSMGR_SELOPT TYPE STRING,
OTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_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_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-SEARCH_PARAMS sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-PROF_GUID sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-ORG_UNITS sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-RESOURCES sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-BEGDA sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-PRESEL_VAL sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-NO_OF_CAND sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-FUZZY sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-AVAIL_TYPE sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-VIEW_TYPE sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-DURATION sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-DURATION_UNIT sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-SRCH_VIEW_TYPE sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-DEM_START sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-DEM_END sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-DEM_DUR sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-DEM_DUR_UNIT sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-DEM_BASED_SEARCH sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-PROFILE_GUID sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-CONS_MGNR sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-QUAL_FLG sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-AVAIL_FLG sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-QUAL_THRS sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-AVAIL_THRS sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-PROFILE_KEY sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-CAND_SELOPT sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-CONSMGR_SELOPT sy-vline 
WA_/MRSS/T_RM_VARNT_SEARCH_INPUT_STR-OTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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