ABAP Select data from SAP table M_IIMAC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_IIMAC
*  INTO TABLE @DATA(IT_M_IIMAC2).
*--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_M_IIMAC INDEX 1 INTO DATA(WA_M_IIMAC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_IIMAC>-MANDT = 1.
<M_IIMAC>-MCOA = 1.
<M_IIMAC>-POSNR = 1.
<M_IIMAC>-SPRAS = 1.
<M_IIMAC>-LFDNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_IIMAC-POSID, sy-vline,
  WA_M_IIMAC-VKOKRS, sy-vline,
  WA_M_IIMAC-VBUKRS, sy-vline,
  WA_M_IIMAC-VKOSTL, sy-vline,
  WA_M_IIMAC-VPRCTR, sy-vline,
  WA_M_IIMAC-VGSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_IIMAC 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_M_IIMAC 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_M_IIMAC INTO WA_M_IIMAC.


*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 REQNR, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_REQNR_OUTPUT'
  EXPORTING
    input =                      WA_M_IIMAC-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_IIMAC-POSNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit REQID, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_REQID_OUTPUT'
  EXPORTING
    input =                      WA_M_IIMAC-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_IIMAC-POSID.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field APRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_IIMAC-APRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_IIMAC-APRCTR.
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_M_IIMAC_STR, 
MANDT TYPE STRING,
MCOA TYPE STRING,
POSNR TYPE STRING,
SPRAS TYPE STRING,
LFDNR TYPE STRING,
POSID TYPE STRING,
VKOKRS TYPE STRING,
VBUKRS TYPE STRING,
VKOSTL TYPE STRING,
VPRCTR TYPE STRING,
VGSBER TYPE STRING,
IVART TYPE STRING,
ABUKRS TYPE STRING,
AKOSTL TYPE STRING,
APRCTR TYPE STRING,
AGSBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_M_IIMAC_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_M_IIMAC_STR-MANDT sy-vline 
WA_M_IIMAC_STR-MCOA sy-vline 
WA_M_IIMAC_STR-POSNR sy-vline 
WA_M_IIMAC_STR-SPRAS sy-vline 
WA_M_IIMAC_STR-LFDNR sy-vline 
WA_M_IIMAC_STR-POSID sy-vline 
WA_M_IIMAC_STR-VKOKRS sy-vline 
WA_M_IIMAC_STR-VBUKRS sy-vline 
WA_M_IIMAC_STR-VKOSTL sy-vline 
WA_M_IIMAC_STR-VPRCTR sy-vline 
WA_M_IIMAC_STR-VGSBER sy-vline 
WA_M_IIMAC_STR-IVART sy-vline 
WA_M_IIMAC_STR-ABUKRS sy-vline 
WA_M_IIMAC_STR-AKOSTL sy-vline 
WA_M_IIMAC_STR-APRCTR sy-vline 
WA_M_IIMAC_STR-AGSBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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