ABAP Select data from SAP table MRTRSS_INP into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MRTRSS_INP
*  INTO TABLE @DATA(IT_MRTRSS_INP2).
*--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_MRTRSS_INP INDEX 1 INTO DATA(WA_MRTRSS_INP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MRTRSS_INP>-PLNTY = 1.
<MRTRSS_INP>-PLNNR = 1.
<MRTRSS_INP>-PLNAL = 1.
<MRTRSS_INP>-DATMR = 1.
<MRTRSS_INP>-AENNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MRTRSS_INP-WERKS, sy-vline,
  WA_MRTRSS_INP-PROFIDNETZ, sy-vline,
  WA_MRTRSS_INP-STATU, sy-vline,
  WA_MRTRSS_INP-VERWE, sy-vline,
  WA_MRTRSS_INP-PHSEQ, sy-vline,
  WA_MRTRSS_INP-VERID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MRTRSS_INP 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_MRTRSS_INP 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_MRTRSS_INP INTO WA_MRTRSS_INP.


*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 ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MRTRSS_INP-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRTRSS_INP-PLNNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field REFUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MRTRSS_INP-REFUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRTRSS_INP-REFUNIT.
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_MRTRSS_INP_STR, 
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
DATMR TYPE STRING,
AENNR TYPE STRING,
WERKS TYPE STRING,
PROFIDNETZ TYPE STRING,
STATU TYPE STRING,
VERWE TYPE STRING,
PHSEQ TYPE STRING,
VERID TYPE STRING,
RFCDEST TYPE STRING,
PNAME TYPE STRING,
NAM TYPE STRING,
DATGR TYPE STRING,
REFQUANT TYPE STRING,
REFUNIT TYPE STRING,
PNGUID TYPE STRING,
NO_RFCDEST TYPE STRING,
VALFROM TYPE STRING,
VALTO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MRTRSS_INP_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_MRTRSS_INP_STR-PLNTY sy-vline 
WA_MRTRSS_INP_STR-PLNNR sy-vline 
WA_MRTRSS_INP_STR-PLNAL sy-vline 
WA_MRTRSS_INP_STR-DATMR sy-vline 
WA_MRTRSS_INP_STR-AENNR sy-vline 
WA_MRTRSS_INP_STR-WERKS sy-vline 
WA_MRTRSS_INP_STR-PROFIDNETZ sy-vline 
WA_MRTRSS_INP_STR-STATU sy-vline 
WA_MRTRSS_INP_STR-VERWE sy-vline 
WA_MRTRSS_INP_STR-PHSEQ sy-vline 
WA_MRTRSS_INP_STR-VERID sy-vline 
WA_MRTRSS_INP_STR-RFCDEST sy-vline 
WA_MRTRSS_INP_STR-PNAME sy-vline 
WA_MRTRSS_INP_STR-NAM sy-vline 
WA_MRTRSS_INP_STR-DATGR sy-vline 
WA_MRTRSS_INP_STR-REFQUANT sy-vline 
WA_MRTRSS_INP_STR-REFUNIT sy-vline 
WA_MRTRSS_INP_STR-PNGUID sy-vline 
WA_MRTRSS_INP_STR-NO_RFCDEST sy-vline 
WA_MRTRSS_INP_STR-VALFROM sy-vline 
WA_MRTRSS_INP_STR-VALTO sy-vline      INTO ld_text SEPARATED BY SPACE.

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