ABAP Select data from SAP table MYMP1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MYMP1 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 MYMP1. 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 MYMP1 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_MYMP1 TYPE STANDARD TABLE OF MYMP1,
      WA_MYMP1 TYPE MYMP1,
      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: <MYMP1> TYPE MYMP1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MYMP1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MYMP1
  INTO TABLE IT_MYMP1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MYMP1
*  INTO TABLE @DATA(IT_MYMP12).
*--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_MYMP1 INDEX 1 INTO DATA(WA_MYMP12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MYMP1 ASSIGNING <MYMP1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MYMP1>-MANDT = 1.
<MYMP1>-MYKEY = 1.
<MYMP1>-MATNR = 1.
<MYMP1>-EBELN = 1.
<MYMP1>-EBELP = 1.

ENDLOOP.

LOOP AT IT_MYMP1 INTO WA_MYMP1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MYMP1-MBLNR, sy-vline,
  WA_MYMP1-MJAHR, sy-vline,
  WA_MYMP1-MBLPO, sy-vline,
  WA_MYMP1-BUDAT, sy-vline,
  WA_MYMP1-ZUMNG, sy-vline,
  WA_MYMP1-ZUWRT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MYMP1 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_MYMP1 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_MYMP1 INTO WA_MYMP1.


*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_MYMP1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MYMP1-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYMP1-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_MYMP1_STR, 
MANDT TYPE STRING,
MYKEY TYPE STRING,
MATNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLPO TYPE STRING,
BUDAT TYPE STRING,
ZUMNG TYPE STRING,
ZUWRT TYPE STRING,
REMNG TYPE STRING,
MEINS TYPE STRING,
BWTAR TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
BWART TYPE STRING,
LIFNR TYPE STRING,
AUFNR TYPE STRING,
XTERN TYPE STRING,
FBASE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MYMP1_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_MYMP1_STR-MANDT sy-vline 
WA_MYMP1_STR-MYKEY sy-vline 
WA_MYMP1_STR-MATNR sy-vline 
WA_MYMP1_STR-EBELN sy-vline 
WA_MYMP1_STR-EBELP sy-vline 
WA_MYMP1_STR-MBLNR sy-vline 
WA_MYMP1_STR-MJAHR sy-vline 
WA_MYMP1_STR-MBLPO sy-vline 
WA_MYMP1_STR-BUDAT sy-vline 
WA_MYMP1_STR-ZUMNG sy-vline 
WA_MYMP1_STR-ZUWRT sy-vline 
WA_MYMP1_STR-REMNG sy-vline 
WA_MYMP1_STR-MEINS sy-vline 
WA_MYMP1_STR-BWTAR sy-vline 
WA_MYMP1_STR-CPUDT sy-vline 
WA_MYMP1_STR-CPUTM sy-vline 
WA_MYMP1_STR-BWART sy-vline 
WA_MYMP1_STR-LIFNR sy-vline 
WA_MYMP1_STR-AUFNR sy-vline 
WA_MYMP1_STR-XTERN sy-vline 
WA_MYMP1_STR-FBASE sy-vline      INTO ld_text SEPARATED BY SPACE.

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