ABAP Select data from SAP table MPRO1 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 MPRO1 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 MPRO1. 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 MPRO1 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_MPRO1 TYPE STANDARD TABLE OF MPRO1,
      WA_MPRO1 TYPE MPRO1,
      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: <MPRO1> TYPE MPRO1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MPRO1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MPRO1
  INTO TABLE IT_MPRO1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPRO1
*  INTO TABLE @DATA(IT_MPRO12).
*--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_MPRO1 INDEX 1 INTO DATA(WA_MPRO12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MPRO1 ASSIGNING <MPRO1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPRO1>-MATNR = 1.
<MPRO1>-MTART = 1.
<MPRO1>-MBRSH = 1.
<MPRO1>-SPRAS = 1.
<MPRO1>-MAKTX = 1.

ENDLOOP.

LOOP AT IT_MPRO1 INTO WA_MPRO1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPRO1-WERKS, sy-vline,
  WA_MPRO1-DISPO, sy-vline,
  WA_MPRO1-MEINS, sy-vline,
  WA_MPRO1-BWKEY, sy-vline,
  WA_MPRO1-STPRS, sy-vline,
  WA_MPRO1-BWTAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPRO1 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_MPRO1 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_MPRO1 INTO WA_MPRO1.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MPRO1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPRO1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MPRO1-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPRO1-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MPRO1-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPRO1-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_MPRO1_STR, 
MATNR TYPE STRING,
MTART TYPE STRING,
MBRSH TYPE STRING,
SPRAS TYPE STRING,
MAKTX TYPE STRING,
WERKS TYPE STRING,
DISPO TYPE STRING,
MEINS TYPE STRING,
BWKEY TYPE STRING,
STPRS TYPE STRING,
BWTAR TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
COPAM TYPE STRING,
FHORI TYPE STRING,
FEVOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPRO1_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_MPRO1_STR-MATNR sy-vline 
WA_MPRO1_STR-MTART sy-vline 
WA_MPRO1_STR-MBRSH sy-vline 
WA_MPRO1_STR-SPRAS sy-vline 
WA_MPRO1_STR-MAKTX sy-vline 
WA_MPRO1_STR-WERKS sy-vline 
WA_MPRO1_STR-DISPO sy-vline 
WA_MPRO1_STR-MEINS sy-vline 
WA_MPRO1_STR-BWKEY sy-vline 
WA_MPRO1_STR-STPRS sy-vline 
WA_MPRO1_STR-BWTAR sy-vline 
WA_MPRO1_STR-PERKZ sy-vline 
WA_MPRO1_STR-PERIV sy-vline 
WA_MPRO1_STR-COPAM sy-vline 
WA_MPRO1_STR-FHORI sy-vline 
WA_MPRO1_STR-FEVOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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