ABAP Select data from SAP table FDM_DOC_MIRROR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FDM_DOC_MIRROR
*  INTO TABLE @DATA(IT_FDM_DOC_MIRROR2).
*--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_FDM_DOC_MIRROR INDEX 1 INTO DATA(WA_FDM_DOC_MIRROR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FDM_DOC_MIRROR>-MANDT = 1.
<FDM_DOC_MIRROR>-M_BUKRS = 1.
<FDM_DOC_MIRROR>-ITEM_TYPE = 1.
<FDM_DOC_MIRROR>-ITEM_KEY = 1.
<FDM_DOC_MIRROR>-INVOICE_REF_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FDM_DOC_MIRROR-INVOICE_REF_KEY, sy-vline,
  WA_FDM_DOC_MIRROR-M_XPOSTED, sy-vline,
  WA_FDM_DOC_MIRROR-M_KUNNR, sy-vline,
  WA_FDM_DOC_MIRROR-M_BELNR, sy-vline,
  WA_FDM_DOC_MIRROR-M_GJAHR, sy-vline,
  WA_FDM_DOC_MIRROR-M_BUZEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FDM_DOC_MIRROR 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_FDM_DOC_MIRROR 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_FDM_DOC_MIRROR INTO WA_FDM_DOC_MIRROR.


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

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

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

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

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

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

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

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

*Conversion exit TSTPS, internal->external for field M_TIMESTAMP
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_FDM_DOC_MIRROR-M_TIMESTAMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_DOC_MIRROR-M_TIMESTAMP.
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_FDM_DOC_MIRROR_STR, 
MANDT TYPE STRING,
M_BUKRS TYPE STRING,
ITEM_TYPE TYPE STRING,
ITEM_KEY TYPE STRING,
INVOICE_REF_TYPE TYPE STRING,
INVOICE_REF_KEY TYPE STRING,
M_XPOSTED TYPE STRING,
M_KUNNR TYPE STRING,
M_BELNR TYPE STRING,
M_GJAHR TYPE STRING,
M_BUZEI TYPE STRING,
M_REBZT TYPE STRING,
M_BELNR_CORR TYPE STRING,
M_GJAHR_CORR TYPE STRING,
M_BUZEI_CORR TYPE STRING,
M_FILKD TYPE STRING,
AMT_DOCCUR TYPE STRING,
CURRENCY TYPE STRING,
LC_AMOUNT TYPE STRING,
DB_CR_IND TYPE STRING,
XPAYMT_ON_ACCT TYPE STRING,
XCLOSED TYPE STRING,
CLOSED_AT TYPE STRING,
XREVERSED TYPE STRING,
DOC_DATE TYPE STRING,
INV_REF TYPE STRING,
BLINE_DATE TYPE STRING,
DSCT_DAYS1 TYPE STRING,
DSCT_DAYS2 TYPE STRING,
NETTERMS TYPE STRING,
DSCT_PCT1 TYPE STRING,
DSCT_PCT2 TYPE STRING,
FIXEDTERMS TYPE STRING,
DISC_BASE TYPE STRING,
DSC_AMT_DC TYPE STRING,
PYMT_METH TYPE STRING,
PMNT_BLOCK TYPE STRING,
DUNN_BLOCK TYPE STRING,
LAST_DUNN TYPE STRING,
DUNN_LEVEL TYPE STRING,
DUNN_AREA TYPE STRING,
ITEM_TEXT TYPE STRING,
REF_DOC_NO TYPE STRING,
REF_KEY_1 TYPE STRING,
REF_KEY_2 TYPE STRING,
ALLOC_NMBR TYPE STRING,
AW_OBJ_TYPE TYPE STRING,
AW_OBJ_KEY TYPE STRING,
AW_LOGSYSTEM TYPE STRING,
M_TIMESTAMP TYPE STRING,
M_UNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FDM_DOC_MIRROR_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_FDM_DOC_MIRROR_STR-MANDT sy-vline 
WA_FDM_DOC_MIRROR_STR-M_BUKRS sy-vline 
WA_FDM_DOC_MIRROR_STR-ITEM_TYPE sy-vline 
WA_FDM_DOC_MIRROR_STR-ITEM_KEY sy-vline 
WA_FDM_DOC_MIRROR_STR-INVOICE_REF_TYPE sy-vline 
WA_FDM_DOC_MIRROR_STR-INVOICE_REF_KEY sy-vline 
WA_FDM_DOC_MIRROR_STR-M_XPOSTED sy-vline 
WA_FDM_DOC_MIRROR_STR-M_KUNNR sy-vline 
WA_FDM_DOC_MIRROR_STR-M_BELNR sy-vline 
WA_FDM_DOC_MIRROR_STR-M_GJAHR sy-vline 
WA_FDM_DOC_MIRROR_STR-M_BUZEI sy-vline 
WA_FDM_DOC_MIRROR_STR-M_REBZT sy-vline 
WA_FDM_DOC_MIRROR_STR-M_BELNR_CORR sy-vline 
WA_FDM_DOC_MIRROR_STR-M_GJAHR_CORR sy-vline 
WA_FDM_DOC_MIRROR_STR-M_BUZEI_CORR sy-vline 
WA_FDM_DOC_MIRROR_STR-M_FILKD sy-vline 
WA_FDM_DOC_MIRROR_STR-AMT_DOCCUR sy-vline 
WA_FDM_DOC_MIRROR_STR-CURRENCY sy-vline 
WA_FDM_DOC_MIRROR_STR-LC_AMOUNT sy-vline 
WA_FDM_DOC_MIRROR_STR-DB_CR_IND sy-vline 
WA_FDM_DOC_MIRROR_STR-XPAYMT_ON_ACCT sy-vline 
WA_FDM_DOC_MIRROR_STR-XCLOSED sy-vline 
WA_FDM_DOC_MIRROR_STR-CLOSED_AT sy-vline 
WA_FDM_DOC_MIRROR_STR-XREVERSED sy-vline 
WA_FDM_DOC_MIRROR_STR-DOC_DATE sy-vline 
WA_FDM_DOC_MIRROR_STR-INV_REF sy-vline 
WA_FDM_DOC_MIRROR_STR-BLINE_DATE sy-vline 
WA_FDM_DOC_MIRROR_STR-DSCT_DAYS1 sy-vline 
WA_FDM_DOC_MIRROR_STR-DSCT_DAYS2 sy-vline 
WA_FDM_DOC_MIRROR_STR-NETTERMS sy-vline 
WA_FDM_DOC_MIRROR_STR-DSCT_PCT1 sy-vline 
WA_FDM_DOC_MIRROR_STR-DSCT_PCT2 sy-vline 
WA_FDM_DOC_MIRROR_STR-FIXEDTERMS sy-vline 
WA_FDM_DOC_MIRROR_STR-DISC_BASE sy-vline 
WA_FDM_DOC_MIRROR_STR-DSC_AMT_DC sy-vline 
WA_FDM_DOC_MIRROR_STR-PYMT_METH sy-vline 
WA_FDM_DOC_MIRROR_STR-PMNT_BLOCK sy-vline 
WA_FDM_DOC_MIRROR_STR-DUNN_BLOCK sy-vline 
WA_FDM_DOC_MIRROR_STR-LAST_DUNN sy-vline 
WA_FDM_DOC_MIRROR_STR-DUNN_LEVEL sy-vline 
WA_FDM_DOC_MIRROR_STR-DUNN_AREA sy-vline 
WA_FDM_DOC_MIRROR_STR-ITEM_TEXT sy-vline 
WA_FDM_DOC_MIRROR_STR-REF_DOC_NO sy-vline 
WA_FDM_DOC_MIRROR_STR-REF_KEY_1 sy-vline 
WA_FDM_DOC_MIRROR_STR-REF_KEY_2 sy-vline 
WA_FDM_DOC_MIRROR_STR-ALLOC_NMBR sy-vline 
WA_FDM_DOC_MIRROR_STR-AW_OBJ_TYPE sy-vline 
WA_FDM_DOC_MIRROR_STR-AW_OBJ_KEY sy-vline 
WA_FDM_DOC_MIRROR_STR-AW_LOGSYSTEM sy-vline 
WA_FDM_DOC_MIRROR_STR-M_TIMESTAMP sy-vline 
WA_FDM_DOC_MIRROR_STR-M_UNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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