ABAP Select data from SAP table VCCIHT_EPI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VCCIHT_EPI
*  INTO TABLE @DATA(IT_VCCIHT_EPI2).
*--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_VCCIHT_EPI INDEX 1 INTO DATA(WA_VCCIHT_EPI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VCCIHT_EPI>-MANDT = 1.
<VCCIHT_EPI>-RECN = 1.
<VCCIHT_EPI>-ACTN = 1.
<VCCIHT_EPI>-VALFR = 1.
<VCCIHT_EPI>-VALTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VCCIHT_EPI-AENNR, sy-vline,
  WA_VCCIHT_EPI-DELFLG, sy-vline,
  WA_VCCIHT_EPI-PARKFLG, sy-vline,
  WA_VCCIHT_EPI-CRDAT, sy-vline,
  WA_VCCIHT_EPI-CRNAM, sy-vline,
  WA_VCCIHT_EPI-UPDDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VCCIHT_EPI 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_VCCIHT_EPI 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_VCCIHT_EPI INTO WA_VCCIHT_EPI.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RECNTCP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VCCIHT_EPI-RECNTCP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VCCIHT_EPI-RECNTCP.
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_VCCIHT_EPI_STR, 
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
RECNTOBJ TYPE STRING,
EPREFOBJ TYPE STRING,
EPTYPE TYPE STRING,
EPID TYPE STRING,
RATINGCAT TYPE STRING,
EPVAL TYPE STRING,
EPIORIG TYPE STRING,
EPIREMARK TYPE STRING,
OPCOND TYPE STRING,
RECNTEPIREF TYPE STRING,
RECNTCP TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VCCIHT_EPI_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_VCCIHT_EPI_STR-MANDT sy-vline 
WA_VCCIHT_EPI_STR-RECN sy-vline 
WA_VCCIHT_EPI_STR-ACTN sy-vline 
WA_VCCIHT_EPI_STR-VALFR sy-vline 
WA_VCCIHT_EPI_STR-VALTO sy-vline 
WA_VCCIHT_EPI_STR-AENNR sy-vline 
WA_VCCIHT_EPI_STR-DELFLG sy-vline 
WA_VCCIHT_EPI_STR-PARKFLG sy-vline 
WA_VCCIHT_EPI_STR-CRDAT sy-vline 
WA_VCCIHT_EPI_STR-CRNAM sy-vline 
WA_VCCIHT_EPI_STR-UPDDAT sy-vline 
WA_VCCIHT_EPI_STR-UPDNAM sy-vline 
WA_VCCIHT_EPI_STR-SRSID sy-vline 
WA_VCCIHT_EPI_STR-OWNID sy-vline 
WA_VCCIHT_EPI_STR-RECNROOT sy-vline 
WA_VCCIHT_EPI_STR-RECNTOBJ sy-vline 
WA_VCCIHT_EPI_STR-EPREFOBJ sy-vline 
WA_VCCIHT_EPI_STR-EPTYPE sy-vline 
WA_VCCIHT_EPI_STR-EPID sy-vline 
WA_VCCIHT_EPI_STR-RATINGCAT sy-vline 
WA_VCCIHT_EPI_STR-EPVAL sy-vline 
WA_VCCIHT_EPI_STR-EPIORIG sy-vline 
WA_VCCIHT_EPI_STR-EPIREMARK sy-vline 
WA_VCCIHT_EPI_STR-OPCOND sy-vline 
WA_VCCIHT_EPI_STR-RECNTEPIREF sy-vline 
WA_VCCIHT_EPI_STR-RECNTCP sy-vline 
WA_VCCIHT_EPI_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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