ABAP Select data from SAP table RMPSS_TRF_IM_BUF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RMPSS_TRF_IM_BUF 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 RMPSS_TRF_IM_BUF. 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 RMPSS_TRF_IM_BUF 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_RMPSS_TRF_IM_BUF TYPE STANDARD TABLE OF RMPSS_TRF_IM_BUF,
      WA_RMPSS_TRF_IM_BUF TYPE RMPSS_TRF_IM_BUF,
      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: <RMPSS_TRF_IM_BUF> TYPE RMPSS_TRF_IM_BUF.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RMPSS_TRF_IM_BUF
  INTO TABLE IT_RMPSS_TRF_IM_BUF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMPSS_TRF_IM_BUF
*  INTO TABLE @DATA(IT_RMPSS_TRF_IM_BUF2).
*--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_RMPSS_TRF_IM_BUF INDEX 1 INTO DATA(WA_RMPSS_TRF_IM_BUF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RMPSS_TRF_IM_BUF ASSIGNING <RMPSS_TRF_IM_BUF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMPSS_TRF_IM_BUF>-SEQNR = 1.
<RMPSS_TRF_IM_BUF>-DBOP = 1.
<RMPSS_TRF_IM_BUF>-IMPORT_RUN = 1.
<RMPSS_TRF_IM_BUF>-CREATED_AT = 1.
<RMPSS_TRF_IM_BUF>-CREATED_BY = 1.

ENDLOOP.

LOOP AT IT_RMPSS_TRF_IM_BUF INTO WA_RMPSS_TRF_IM_BUF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMPSS_TRF_IM_BUF-MAPPING, sy-vline,
  WA_RMPSS_TRF_IM_BUF-STD_SUBSTITUE, sy-vline,
  WA_RMPSS_TRF_IM_BUF-ACTION, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_RMPSS_TRF_IM_BUF 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_RMPSS_TRF_IM_BUF 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_RMPSS_TRF_IM_BUF INTO WA_RMPSS_TRF_IM_BUF.


*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 TSTPS, internal->external for field CREATED_AT
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_RMPSS_TRF_IM_BUF-CREATED_AT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPSS_TRF_IM_BUF-CREATED_AT.
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_RMPSS_TRF_IM_BUF_STR, 
SEQNR TYPE STRING,
DBOP TYPE STRING,
IMPORT_RUN TYPE STRING,
CREATED_AT TYPE STRING,
CREATED_BY TYPE STRING,
MAPPING TYPE STRING,
STD_SUBSTITUE TYPE STRING,
ACTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMPSS_TRF_IM_BUF_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_RMPSS_TRF_IM_BUF_STR-SEQNR sy-vline 
WA_RMPSS_TRF_IM_BUF_STR-DBOP sy-vline 
WA_RMPSS_TRF_IM_BUF_STR-IMPORT_RUN sy-vline 
WA_RMPSS_TRF_IM_BUF_STR-CREATED_AT sy-vline 
WA_RMPSS_TRF_IM_BUF_STR-CREATED_BY sy-vline 
WA_RMPSS_TRF_IM_BUF_STR-MAPPING sy-vline 
WA_RMPSS_TRF_IM_BUF_STR-STD_SUBSTITUE sy-vline 
WA_RMPSS_TRF_IM_BUF_STR-ACTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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