ABAP Select data from SAP table FCOV_CO_MIG2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FCOV_CO_MIG2 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 FCOV_CO_MIG2. 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 FCOV_CO_MIG2 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_FCOV_CO_MIG2 TYPE STANDARD TABLE OF FCOV_CO_MIG2,
      WA_FCOV_CO_MIG2 TYPE FCOV_CO_MIG2,
      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: <FCOV_CO_MIG2> TYPE FCOV_CO_MIG2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FCOV_CO_MIG2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FCOV_CO_MIG2
  INTO TABLE IT_FCOV_CO_MIG2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FCOV_CO_MIG2
*  INTO TABLE @DATA(IT_FCOV_CO_MIG22).
*--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_FCOV_CO_MIG2 INDEX 1 INTO DATA(WA_FCOV_CO_MIG22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FCOV_CO_MIG2 ASSIGNING <FCOV_CO_MIG2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FCOV_CO_MIG2>-MANDT = 1.
<FCOV_CO_MIG2>-KOKRS = 1.
<FCOV_CO_MIG2>-BELNR = 1.
<FCOV_CO_MIG2>-BUZEI = 1.
<FCOV_CO_MIG2>-AWTYP = 1.

ENDLOOP.

LOOP AT IT_FCOV_CO_MIG2 INTO WA_FCOV_CO_MIG2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FCOV_CO_MIG2-AWKEY, sy-vline,
  WA_FCOV_CO_MIG2-AWSYS, sy-vline,
  WA_FCOV_CO_MIG2-BLDAT, sy-vline,
  WA_FCOV_CO_MIG2-TWAER, sy-vline,
  WA_FCOV_CO_MIG2-WTGBTR, sy-vline,
  WA_FCOV_CO_MIG2-KSTAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FCOV_CO_MIG2 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_FCOV_CO_MIG2 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_FCOV_CO_MIG2 INTO WA_FCOV_CO_MIG2.


*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_FCOV_CO_MIG2-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOV_CO_MIG2-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOV_CO_MIG2-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOV_CO_MIG2-AWSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WTGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FCOV_CO_MIG2-WTGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOV_CO_MIG2-WTGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOV_CO_MIG2-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOV_CO_MIG2-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOV_CO_MIG2-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOV_CO_MIG2-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOV_CO_MIG2-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOV_CO_MIG2-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOV_CO_MIG2-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOV_CO_MIG2-VBELN.
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_FCOV_CO_MIG2_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
AWSYS TYPE STRING,
BLDAT TYPE STRING,
TWAER TYPE STRING,
WTGBTR TYPE STRING,
KSTAR TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
PARGB TYPE STRING,
OBJNR TYPE STRING,
OBJNR_N1 TYPE STRING,
OBJNR_N2 TYPE STRING,
OBJNR_N3 TYPE STRING,
ACCASTY TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
VBELN TYPE STRING,
VBPOSNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FCOV_CO_MIG2_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_FCOV_CO_MIG2_STR-MANDT sy-vline 
WA_FCOV_CO_MIG2_STR-KOKRS sy-vline 
WA_FCOV_CO_MIG2_STR-BELNR sy-vline 
WA_FCOV_CO_MIG2_STR-BUZEI sy-vline 
WA_FCOV_CO_MIG2_STR-AWTYP sy-vline 
WA_FCOV_CO_MIG2_STR-AWKEY sy-vline 
WA_FCOV_CO_MIG2_STR-AWSYS sy-vline 
WA_FCOV_CO_MIG2_STR-BLDAT sy-vline 
WA_FCOV_CO_MIG2_STR-TWAER sy-vline 
WA_FCOV_CO_MIG2_STR-WTGBTR sy-vline 
WA_FCOV_CO_MIG2_STR-KSTAR sy-vline 
WA_FCOV_CO_MIG2_STR-BUKRS sy-vline 
WA_FCOV_CO_MIG2_STR-GSBER sy-vline 
WA_FCOV_CO_MIG2_STR-PARGB sy-vline 
WA_FCOV_CO_MIG2_STR-OBJNR sy-vline 
WA_FCOV_CO_MIG2_STR-OBJNR_N1 sy-vline 
WA_FCOV_CO_MIG2_STR-OBJNR_N2 sy-vline 
WA_FCOV_CO_MIG2_STR-OBJNR_N3 sy-vline 
WA_FCOV_CO_MIG2_STR-ACCASTY sy-vline 
WA_FCOV_CO_MIG2_STR-KOSTL sy-vline 
WA_FCOV_CO_MIG2_STR-AUFNR sy-vline 
WA_FCOV_CO_MIG2_STR-POSNR sy-vline 
WA_FCOV_CO_MIG2_STR-VBELN sy-vline 
WA_FCOV_CO_MIG2_STR-VBPOSNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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