ABAP Select data from SAP table MC04P_2MAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MC04P_2MAT 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 MC04P_2MAT. 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 MC04P_2MAT 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_MC04P_2MAT TYPE STANDARD TABLE OF MC04P_2MAT,
      WA_MC04P_2MAT TYPE MC04P_2MAT,
      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: <MC04P_2MAT> TYPE MC04P_2MAT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MC04P_2MAT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MC04P_2MAT
  INTO TABLE IT_MC04P_2MAT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MC04P_2MAT
*  INTO TABLE @DATA(IT_MC04P_2MAT2).
*--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_MC04P_2MAT INDEX 1 INTO DATA(WA_MC04P_2MAT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MC04P_2MAT ASSIGNING <MC04P_2MAT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MC04P_2MAT>-BUDAT = 1.
<MC04P_2MAT>-DFZEH = 1.
<MC04P_2MAT>-DFZEXEH = 1.
<MC04P_2MAT>-ETRMP = 1.
<MC04P_2MAT>-IAMNG = 1.

ENDLOOP.

LOOP AT IT_MC04P_2MAT INTO WA_MC04P_2MAT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MC04P_2MAT-I_DFZ, sy-vline,
  WA_MC04P_2MAT-I_DFZ_EX, sy-vline,
  WA_MC04P_2MAT-I_DLZ, sy-vline,
  WA_MC04P_2MAT-I_DLZ_EX, sy-vline,
  WA_MC04P_2MAT-KDAUF, sy-vline,
  WA_MC04P_2MAT-KEINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MC04P_2MAT 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_MC04P_2MAT 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_MC04P_2MAT INTO WA_MC04P_2MAT.


*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 CUNIT, internal->external for field DFZEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC04P_2MAT-DFZEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC04P_2MAT-DFZEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DFZEXEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC04P_2MAT-DFZEXEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC04P_2MAT-DFZEXEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC04P_2MAT-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC04P_2MAT-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC04P_2MAT-KEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC04P_2MAT-KEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MC04P_2MAT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC04P_2MAT-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MC04P_2MAT-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC04P_2MAT-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC04P_2MAT-PLNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC04P_2MAT-PLNUM.
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_MC04P_2MAT_STR, 
BUDAT TYPE STRING,
DFZEH TYPE STRING,
DFZEXEH TYPE STRING,
ETRMP TYPE STRING,
IAMNG TYPE STRING,
I_DFZ TYPE STRING,
I_DFZ_EX TYPE STRING,
I_DLZ TYPE STRING,
I_DLZ_EX TYPE STRING,
KDAUF TYPE STRING,
KEINH TYPE STRING,
KSUMS TYPE STRING,
LTRMI TYPE STRING,
LTRMP TYPE STRING,
MATNR TYPE STRING,
MEINS TYPE STRING,
PAMNG TYPE STRING,
PGMNG TYPE STRING,
PI_FREI TYPE STRING,
PI_LIEF TYPE STRING,
PI_STAR TYPE STRING,
PLNUM TYPE STRING,
POSNR TYPE STRING,
PSAMG TYPE STRING,
PSMNG TYPE STRING,
PS_FREI TYPE STRING,
PS_LIEF TYPE STRING,
PS_STAR TYPE STRING,
PWERK TYPE STRING,
P_DLZ TYPE STRING,
SI_FREI TYPE STRING,
SI_LIEF TYPE STRING,
SI_STAR TYPE STRING,
STRMP TYPE STRING,
S_DFZ TYPE STRING,
S_DFZ_EX TYPE STRING,
S_DLZ TYPE STRING,
S_DLZ_EX TYPE STRING,
WEMNG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MC04P_2MAT_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_MC04P_2MAT_STR-BUDAT sy-vline 
WA_MC04P_2MAT_STR-DFZEH sy-vline 
WA_MC04P_2MAT_STR-DFZEXEH sy-vline 
WA_MC04P_2MAT_STR-ETRMP sy-vline 
WA_MC04P_2MAT_STR-IAMNG sy-vline 
WA_MC04P_2MAT_STR-I_DFZ sy-vline 
WA_MC04P_2MAT_STR-I_DFZ_EX sy-vline 
WA_MC04P_2MAT_STR-I_DLZ sy-vline 
WA_MC04P_2MAT_STR-I_DLZ_EX sy-vline 
WA_MC04P_2MAT_STR-KDAUF sy-vline 
WA_MC04P_2MAT_STR-KEINH sy-vline 
WA_MC04P_2MAT_STR-KSUMS sy-vline 
WA_MC04P_2MAT_STR-LTRMI sy-vline 
WA_MC04P_2MAT_STR-LTRMP sy-vline 
WA_MC04P_2MAT_STR-MATNR sy-vline 
WA_MC04P_2MAT_STR-MEINS sy-vline 
WA_MC04P_2MAT_STR-PAMNG sy-vline 
WA_MC04P_2MAT_STR-PGMNG sy-vline 
WA_MC04P_2MAT_STR-PI_FREI sy-vline 
WA_MC04P_2MAT_STR-PI_LIEF sy-vline 
WA_MC04P_2MAT_STR-PI_STAR sy-vline 
WA_MC04P_2MAT_STR-PLNUM sy-vline 
WA_MC04P_2MAT_STR-POSNR sy-vline 
WA_MC04P_2MAT_STR-PSAMG sy-vline 
WA_MC04P_2MAT_STR-PSMNG sy-vline 
WA_MC04P_2MAT_STR-PS_FREI sy-vline 
WA_MC04P_2MAT_STR-PS_LIEF sy-vline 
WA_MC04P_2MAT_STR-PS_STAR sy-vline 
WA_MC04P_2MAT_STR-PWERK sy-vline 
WA_MC04P_2MAT_STR-P_DLZ sy-vline 
WA_MC04P_2MAT_STR-SI_FREI sy-vline 
WA_MC04P_2MAT_STR-SI_LIEF sy-vline 
WA_MC04P_2MAT_STR-SI_STAR sy-vline 
WA_MC04P_2MAT_STR-STRMP sy-vline 
WA_MC04P_2MAT_STR-S_DFZ sy-vline 
WA_MC04P_2MAT_STR-S_DFZ_EX sy-vline 
WA_MC04P_2MAT_STR-S_DLZ sy-vline 
WA_MC04P_2MAT_STR-S_DLZ_EX sy-vline 
WA_MC04P_2MAT_STR-WEMNG sy-vline      INTO ld_text SEPARATED BY SPACE.

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