ABAP Select data from SAP table CPEC_FORMCONV_MIGR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPEC_FORMCONV_MIGR
*  INTO TABLE @DATA(IT_CPEC_FORMCONV_MIGR2).
*--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_CPEC_FORMCONV_MIGR INDEX 1 INTO DATA(WA_CPEC_FORMCONV_MIGR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPEC_FORMCONV_MIGR>-CLIENT = 1.
<CPEC_FORMCONV_MIGR>-LOGSYS = 1.
<CPEC_FORMCONV_MIGR>-RECORDNAME = 1.
<CPEC_FORMCONV_MIGR>-FORMID = 1.
<CPEC_FORMCONV_MIGR>-COND_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPEC_FORMCONV_MIGR-VALIDTO, sy-vline,
  WA_CPEC_FORMCONV_MIGR-CONVPLACE, sy-vline,
  WA_CPEC_FORMCONV_MIGR-CURRFROM, sy-vline,
  WA_CPEC_FORMCONV_MIGR-UOMFROM, sy-vline,
  WA_CPEC_FORMCONV_MIGR-CURRTO, sy-vline,
  WA_CPEC_FORMCONV_MIGR-UOMTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPEC_FORMCONV_MIGR 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_CPEC_FORMCONV_MIGR 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_CPEC_FORMCONV_MIGR INTO WA_CPEC_FORMCONV_MIGR.


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

*Conversion exit TSTPS, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_CPEC_FORMCONV_MIGR-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPEC_FORMCONV_MIGR-VALIDTO.
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_CPEC_FORMCONV_MIGR_STR, 
CLIENT TYPE STRING,
LOGSYS TYPE STRING,
RECORDNAME TYPE STRING,
FORMID TYPE STRING,
COND_TYPE TYPE STRING,
VALIDTO TYPE STRING,
CONVPLACE TYPE STRING,
CURRFROM TYPE STRING,
UOMFROM TYPE STRING,
CURRTO TYPE STRING,
UOMTO TYPE STRING,
CONVERSIONRULE TYPE STRING,
FIXEXCHRATE TYPE STRING,
FACTORFROM TYPE STRING,
FACTORTO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPEC_FORMCONV_MIGR_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_CPEC_FORMCONV_MIGR_STR-CLIENT sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-LOGSYS sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-RECORDNAME sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-FORMID sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-COND_TYPE sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-VALIDTO sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-CONVPLACE sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-CURRFROM sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-UOMFROM sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-CURRTO sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-UOMTO sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-CONVERSIONRULE sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-FIXEXCHRATE sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-FACTORFROM sy-vline 
WA_CPEC_FORMCONV_MIGR_STR-FACTORTO sy-vline      INTO ld_text SEPARATED BY SPACE.

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