ABAP Select data from SAP table /SAPAPO/MSNP_RESMAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MSNP_RESMAT
*  INTO TABLE @DATA(IT_/SAPAPO/MSNP_RESMAT2).
*--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_/SAPAPO/MSNP_RESMAT INDEX 1 INTO DATA(WA_/SAPAPO/MSNP_RESMAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MSNP_RESMAT>-RESID = 1.
</SAPAPO/MSNP_RESMAT>-MATID = 1.
</SAPAPO/MSNP_RESMAT>-LOCID = 1.
</SAPAPO/MSNP_RESMAT>-LOCFR = 1.
</SAPAPO/MSNP_RESMAT>-PLOBJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MSNP_RESMAT-PLOBID, sy-vline,
  WA_/SAPAPO/MSNP_RESMAT-TRPID, sy-vline,
  WA_/SAPAPO/MSNP_RESMAT-BUCKE, sy-vline,
  WA_/SAPAPO/MSNP_RESMAT-QUANT, sy-vline,
  WA_/SAPAPO/MSNP_RESMAT-RNAME, sy-vline,
  WA_/SAPAPO/MSNP_RESMAT-RCONA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MSNP_RESMAT 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_/SAPAPO/MSNP_RESMAT 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_/SAPAPO/MSNP_RESMAT INTO WA_/SAPAPO/MSNP_RESMAT.


*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 PLOBC, internal->external for field PLOBID
CALL FUNCTION 'CONVERSION_EXIT_PLOBC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MSNP_RESMAT-PLOBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MSNP_RESMAT-PLOBID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MSNP_RESMAT-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MSNP_RESMAT-MEINS.
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_/SAPAPO/MSNP_RESMAT_STR, 
RESID TYPE STRING,
MATID TYPE STRING,
LOCID TYPE STRING,
LOCFR TYPE STRING,
PLOBJ TYPE STRING,
PLOBID TYPE STRING,
TRPID TYPE STRING,
BUCKE TYPE STRING,
QUANT TYPE STRING,
RNAME TYPE STRING,
RCONA TYPE STRING,
UNITA TYPE STRING,
CUNIA TYPE STRING,
RESTYPE TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
COVER TYPE STRING,
PRIO TYPE STRING,
GCOST TYPE STRING,
BCOST TYPE STRING,
LCOST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MSNP_RESMAT_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_/SAPAPO/MSNP_RESMAT_STR-RESID sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-MATID sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-LOCID sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-LOCFR sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-PLOBJ sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-PLOBID sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-TRPID sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-BUCKE sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-QUANT sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-RNAME sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-RCONA sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-UNITA sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-CUNIA sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-RESTYPE sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-MATNR sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-MEINS sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-COVER sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-PRIO sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-GCOST sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-BCOST sy-vline 
WA_/SAPAPO/MSNP_RESMAT_STR-LCOST sy-vline      INTO ld_text SEPARATED BY SPACE.

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