ABAP Select data from SAP table IMRG into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IMRG 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 IMRG. 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 IMRG 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_IMRG TYPE STANDARD TABLE OF IMRG,
      WA_IMRG TYPE IMRG,
      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: <IMRG> TYPE IMRG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMRG
*  INTO TABLE @DATA(IT_IMRG2).
*--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_IMRG INDEX 1 INTO DATA(WA_IMRG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMRG>-MANDT = 1.
<IMRG>-MDOCM = 1.
<IMRG>-POINT = 1.
<IMRG>-IDATE = 1.
<IMRG>-ITIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMRG-INVTS, sy-vline,
  WA_IMRG-CNTRG, sy-vline,
  WA_IMRG-MDTXT, sy-vline,
  WA_IMRG-MLANG, sy-vline,
  WA_IMRG-KZLTX, sy-vline,
  WA_IMRG-READR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMRG 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_IMRG 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_IMRG INTO WA_IMRG.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IMRG-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMRG-LOGSYSTEM.
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_IMRG_STR, 
MANDT TYPE STRING,
MDOCM TYPE STRING,
POINT TYPE STRING,
IDATE TYPE STRING,
ITIME TYPE STRING,
INVTS TYPE STRING,
CNTRG TYPE STRING,
MDTXT TYPE STRING,
MLANG TYPE STRING,
KZLTX TYPE STRING,
READR TYPE STRING,
ERDAT TYPE STRING,
ERUHR TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
LVORM TYPE STRING,
GENER TYPE STRING,
PRUEFLOS TYPE STRING,
VORGLFNR TYPE STRING,
MERKNR TYPE STRING,
DETAILERG TYPE STRING,
ROOTD TYPE STRING,
TOLTY TYPE STRING,
TOLID TYPE STRING,
WOOBJ TYPE STRING,
DOCAF TYPE STRING,
READG TYPE STRING,
READGI TYPE STRING,
RECDV TYPE STRING,
RECDVI TYPE STRING,
RECDU TYPE STRING,
CNTRR TYPE STRING,
CNTRRI TYPE STRING,
CDIFF TYPE STRING,
CDIFFI TYPE STRING,
IDIFF TYPE STRING,
EXCHG TYPE STRING,
TOTEX TYPE STRING,
CODCT TYPE STRING,
CODGR TYPE STRING,
VLCOD TYPE STRING,
CVERS TYPE STRING,
PREST TYPE STRING,
CANCL TYPE STRING,
WOOB1 TYPE STRING,
PROBENR TYPE STRING,
MBEWERTG TYPE STRING,
INTVL TYPE STRING,
IDAT1 TYPE STRING,
ITIM1 TYPE STRING,
TMSTP_BW TYPE STRING,
LOGSYSTEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMRG_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_IMRG_STR-MANDT sy-vline 
WA_IMRG_STR-MDOCM sy-vline 
WA_IMRG_STR-POINT sy-vline 
WA_IMRG_STR-IDATE sy-vline 
WA_IMRG_STR-ITIME sy-vline 
WA_IMRG_STR-INVTS sy-vline 
WA_IMRG_STR-CNTRG sy-vline 
WA_IMRG_STR-MDTXT sy-vline 
WA_IMRG_STR-MLANG sy-vline 
WA_IMRG_STR-KZLTX sy-vline 
WA_IMRG_STR-READR sy-vline 
WA_IMRG_STR-ERDAT sy-vline 
WA_IMRG_STR-ERUHR sy-vline 
WA_IMRG_STR-ERNAM sy-vline 
WA_IMRG_STR-AEDAT sy-vline 
WA_IMRG_STR-AENAM sy-vline 
WA_IMRG_STR-LVORM sy-vline 
WA_IMRG_STR-GENER sy-vline 
WA_IMRG_STR-PRUEFLOS sy-vline 
WA_IMRG_STR-VORGLFNR sy-vline 
WA_IMRG_STR-MERKNR sy-vline 
WA_IMRG_STR-DETAILERG sy-vline 
WA_IMRG_STR-ROOTD sy-vline 
WA_IMRG_STR-TOLTY sy-vline 
WA_IMRG_STR-TOLID sy-vline 
WA_IMRG_STR-WOOBJ sy-vline 
WA_IMRG_STR-DOCAF sy-vline 
WA_IMRG_STR-READG sy-vline 
WA_IMRG_STR-READGI sy-vline 
WA_IMRG_STR-RECDV sy-vline 
WA_IMRG_STR-RECDVI sy-vline 
WA_IMRG_STR-RECDU sy-vline 
WA_IMRG_STR-CNTRR sy-vline 
WA_IMRG_STR-CNTRRI sy-vline 
WA_IMRG_STR-CDIFF sy-vline 
WA_IMRG_STR-CDIFFI sy-vline 
WA_IMRG_STR-IDIFF sy-vline 
WA_IMRG_STR-EXCHG sy-vline 
WA_IMRG_STR-TOTEX sy-vline 
WA_IMRG_STR-CODCT sy-vline 
WA_IMRG_STR-CODGR sy-vline 
WA_IMRG_STR-VLCOD sy-vline 
WA_IMRG_STR-CVERS sy-vline 
WA_IMRG_STR-PREST sy-vline 
WA_IMRG_STR-CANCL sy-vline 
WA_IMRG_STR-WOOB1 sy-vline 
WA_IMRG_STR-PROBENR sy-vline 
WA_IMRG_STR-MBEWERTG sy-vline 
WA_IMRG_STR-INTVL sy-vline 
WA_IMRG_STR-IDAT1 sy-vline 
WA_IMRG_STR-ITIM1 sy-vline 
WA_IMRG_STR-TMSTP_BW sy-vline 
WA_IMRG_STR-LOGSYSTEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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