ABAP Select data from SAP table M_IIMAB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP M_IIMAB 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_IIMAB. 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_IIMAB 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_IIMAB TYPE STANDARD TABLE OF M_IIMAB,
      WA_M_IIMAB TYPE M_IIMAB,
      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_IIMAB> TYPE M_IIMAB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_IIMAB
*  INTO TABLE @DATA(IT_M_IIMAB2).
*--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_IIMAB INDEX 1 INTO DATA(WA_M_IIMAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_IIMAB>-MANDT = 1.
<M_IIMAB>-MCOA = 1.
<M_IIMAB>-IVART = 1.
<M_IIMAB>-AKOSTL = 1.
<M_IIMAB>-AGSBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_IIMAB-APRCTR, sy-vline,
  WA_M_IIMAB-POSNR, sy-vline,
  WA_M_IIMAB-POSID, sy-vline,
  WA_M_IIMAB-SPRAS, sy-vline,
  WA_M_IIMAB-LFDNR, sy-vline,
  WA_M_IIMAB-ABUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_IIMAB 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_IIMAB 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_IIMAB INTO WA_M_IIMAB.


*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 IVART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_IIMAB-IVART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_IIMAB-IVART.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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