ABAP Select data from SAP table FMFG_MRG_IPAC_REV_OUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMFG_MRG_IPAC_REV_OUT
*  INTO TABLE @DATA(IT_FMFG_MRG_IPAC_REV_OUT2).
*--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_FMFG_MRG_IPAC_REV_OUT INDEX 1 INTO DATA(WA_FMFG_MRG_IPAC_REV_OUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMFG_MRG_IPAC_REV_OUT>-INCLUDE = 1.
<FMFG_MRG_IPAC_REV_OUT>-CLIENT = 1.
<FMFG_MRG_IPAC_REV_OUT>-FILEID = 1.
<FMFG_MRG_IPAC_REV_OUT>-BUKRS = 1.
<FMFG_MRG_IPAC_REV_OUT>-DOCREF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMFG_MRG_IPAC_REV_OUT-BELNR, sy-vline,
  WA_FMFG_MRG_IPAC_REV_OUT-GJAHR, sy-vline,
  WA_FMFG_MRG_IPAC_REV_OUT-BUZEI, sy-vline,
  WA_FMFG_MRG_IPAC_REV_OUT-RECNBR, sy-vline,
  WA_FMFG_MRG_IPAC_REV_OUT-TRANSID, sy-vline,
  WA_FMFG_MRG_IPAC_REV_OUT-IPAC_DT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMFG_MRG_IPAC_REV_OUT 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_FMFG_MRG_IPAC_REV_OUT 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_FMFG_MRG_IPAC_REV_OUT INTO WA_FMFG_MRG_IPAC_REV_OUT.


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

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

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

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

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

*Conversion exit GJAHR, internal->external for field REVERSE_DOC_FY
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMFG_MRG_IPAC_REV_OUT-REVERSE_DOC_FY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMFG_MRG_IPAC_REV_OUT-REVERSE_DOC_FY.
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_FMFG_MRG_IPAC_REV_OUT_STR, 
INCLUDE TYPE STRING,
CLIENT TYPE STRING,
FILEID TYPE STRING,
BUKRS TYPE STRING,
DOCREF TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
RECNBR TYPE STRING,
TRANSID TYPE STRING,
IPAC_DT TYPE STRING,
CLEARING_DOC TYPE STRING,
CLEARING_DOC_FY TYPE STRING,
REVERSE_DOC TYPE STRING,
REVERSE_DOC_FY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMFG_MRG_IPAC_REV_OUT_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_FMFG_MRG_IPAC_REV_OUT_STR-INCLUDE sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-CLIENT sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-FILEID sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-BUKRS sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-DOCREF sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-BELNR sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-GJAHR sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-BUZEI sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-RECNBR sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-TRANSID sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-IPAC_DT sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-CLEARING_DOC sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-CLEARING_DOC_FY sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-REVERSE_DOC sy-vline 
WA_FMFG_MRG_IPAC_REV_OUT_STR-REVERSE_DOC_FY sy-vline      INTO ld_text SEPARATED BY SPACE.

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