ABAP Select data from SAP table MYMP1R into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MYMP1R 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 MYMP1R. 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 MYMP1R 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_MYMP1R TYPE STANDARD TABLE OF MYMP1R,
      WA_MYMP1R TYPE MYMP1R,
      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: <MYMP1R> TYPE MYMP1R.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MYMP1R.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MYMP1R
  INTO TABLE IT_MYMP1R.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MYMP1R
*  INTO TABLE @DATA(IT_MYMP1R2).
*--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_MYMP1R INDEX 1 INTO DATA(WA_MYMP1R2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MYMP1R ASSIGNING <MYMP1R>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MYMP1R>-MANDT = 1.
<MYMP1R>-MYKEY = 1.
<MYMP1R>-MATNR = 1.
<MYMP1R>-EBELN = 1.
<MYMP1R>-EBELP = 1.

ENDLOOP.

LOOP AT IT_MYMP1R INTO WA_MYMP1R.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MYMP1R-LFBNR, sy-vline,
  WA_MYMP1R-LFGJA, sy-vline,
  WA_MYMP1R-LFPOS, sy-vline,
  WA_MYMP1R-BUDAT, sy-vline,
  WA_MYMP1R-REMNG, sy-vline,
  WA_MYMP1R-REWRT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MYMP1R 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_MYMP1R 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_MYMP1R INTO WA_MYMP1R.


*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_MYMP1R-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1R-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1R-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1R-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LFBNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1R-LFBNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1R-LFBNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1R-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1R-LFGJA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1R-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1R-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1R-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1R-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1R-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1R-AUFNR.
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_MYMP1R_STR, 
MANDT TYPE STRING,
MYKEY TYPE STRING,
MATNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
LFBNR TYPE STRING,
LFGJA TYPE STRING,
LFPOS TYPE STRING,
BUDAT TYPE STRING,
REMNG TYPE STRING,
REWRT TYPE STRING,
MEINS TYPE STRING,
BWTAR TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
LIFNR TYPE STRING,
AUFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MYMP1R_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_MYMP1R_STR-MANDT sy-vline 
WA_MYMP1R_STR-MYKEY sy-vline 
WA_MYMP1R_STR-MATNR sy-vline 
WA_MYMP1R_STR-EBELN sy-vline 
WA_MYMP1R_STR-EBELP sy-vline 
WA_MYMP1R_STR-LFBNR sy-vline 
WA_MYMP1R_STR-LFGJA sy-vline 
WA_MYMP1R_STR-LFPOS sy-vline 
WA_MYMP1R_STR-BUDAT sy-vline 
WA_MYMP1R_STR-REMNG sy-vline 
WA_MYMP1R_STR-REWRT sy-vline 
WA_MYMP1R_STR-MEINS sy-vline 
WA_MYMP1R_STR-BWTAR sy-vline 
WA_MYMP1R_STR-CPUDT sy-vline 
WA_MYMP1R_STR-CPUTM sy-vline 
WA_MYMP1R_STR-LIFNR sy-vline 
WA_MYMP1R_STR-AUFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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