ABAP Select data from SAP table MMIM_MATDOC_ITEM_READ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMIM_MATDOC_ITEM_READ
*  INTO TABLE @DATA(IT_MMIM_MATDOC_ITEM_READ2).
*--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_MMIM_MATDOC_ITEM_READ INDEX 1 INTO DATA(WA_MMIM_MATDOC_ITEM_READ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMIM_MATDOC_ITEM_READ>-MBLNR = 1.
<MMIM_MATDOC_ITEM_READ>-MJAHR = 1.
<MMIM_MATDOC_ITEM_READ>-ZEILE = 1.
<MMIM_MATDOC_ITEM_READ>-BWART = 1.
<MMIM_MATDOC_ITEM_READ>-BWART_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMIM_MATDOC_ITEM_READ-BWART_NAME_LONG, sy-vline,
  WA_MMIM_MATDOC_ITEM_READ-WERKS, sy-vline,
  WA_MMIM_MATDOC_ITEM_READ-WERKS_NAME, sy-vline,
  WA_MMIM_MATDOC_ITEM_READ-LGORT, sy-vline,
  WA_MMIM_MATDOC_ITEM_READ-LGOBE, sy-vline,
  WA_MMIM_MATDOC_ITEM_READ-CHARG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMIM_MATDOC_ITEM_READ 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_MMIM_MATDOC_ITEM_READ 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_MMIM_MATDOC_ITEM_READ INTO WA_MMIM_MATDOC_ITEM_READ.


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMIM_MATDOC_ITEM_READ-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMIM_MATDOC_ITEM_READ-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_MMIM_MATDOC_ITEM_READ_STR, 
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
BWART TYPE STRING,
BWART_NAME TYPE STRING,
BWART_NAME_LONG TYPE STRING,
WERKS TYPE STRING,
WERKS_NAME TYPE STRING,
LGORT TYPE STRING,
LGOBE TYPE STRING,
CHARG TYPE STRING,
UMWRK TYPE STRING,
UMNAME1 TYPE STRING,
UMLGO TYPE STRING,
UMLGOBE TYPE STRING,
LBBSA TYPE STRING,
LBBSA_NAME TYPE STRING,
UMLBBSA TYPE STRING,
UMLBBSA_NAME TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
EBELN TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
KDAUF TYPE STRING,
VBELN_IM TYPE STRING,
SHKZG TYPE STRING,
WORK_ITEM_ID TYPE STRING,
PERNR TYPE STRING,
SAKTO TYPE STRING,
KOSTL TYPE STRING,
SUPPLIER_NAME TYPE STRING,
CUSTOMER_NAME TYPE STRING,
SMBLN_REVERSED TYPE STRING,
SJAHR_REVERSED TYPE STRING,
SMBLP_REVERSED TYPE STRING,
SMBLN_REVERSAL TYPE STRING,
SJAHR_REVERSAL TYPE STRING,
SMBLP_REVERSAL TYPE STRING,
IS_CANCELLATION_ALLOWED TYPE STRING,
ABLAD TYPE STRING,
WEMPF TYPE STRING,
SOBKZ TYPE STRING,
KZBEW TYPE STRING,
KZZUG TYPE STRING,
KZVBR TYPE STRING,
SGTXT TYPE STRING,
AUFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMIM_MATDOC_ITEM_READ_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_MMIM_MATDOC_ITEM_READ_STR-MBLNR sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-MJAHR sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-ZEILE sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-BWART sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-BWART_NAME sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-BWART_NAME_LONG sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-WERKS sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-WERKS_NAME sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-LGORT sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-LGOBE sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-CHARG sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-UMWRK sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-UMNAME1 sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-UMLGO sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-UMLGOBE sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-LBBSA sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-LBBSA_NAME sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-UMLBBSA sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-UMLBBSA_NAME sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-MATNR sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-MAKTX sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-ERFMG sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-ERFME sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-EBELN sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-LIFNR sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-KUNNR sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-KDAUF sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-VBELN_IM sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SHKZG sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-WORK_ITEM_ID sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-PERNR sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SAKTO sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-KOSTL sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SUPPLIER_NAME sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-CUSTOMER_NAME sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SMBLN_REVERSED sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SJAHR_REVERSED sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SMBLP_REVERSED sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SMBLN_REVERSAL sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SJAHR_REVERSAL sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SMBLP_REVERSAL sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-IS_CANCELLATION_ALLOWED sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-ABLAD sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-WEMPF sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SOBKZ sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-KZBEW sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-KZZUG sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-KZVBR sy-vline 
WA_MMIM_MATDOC_ITEM_READ_STR-SGTXT sy-vline 
WA_MMIM_MATDOC_ITEM_READ_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.