ABAP Select data from SAP table CVDDHHITT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVDDHHITT
*  INTO TABLE @DATA(IT_CVDDHHITT2).
*--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_CVDDHHITT INDEX 1 INTO DATA(WA_CVDDHHITT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CVDDHHITT>-LOGID = 1.
<CVDDHHITT>-RECADR_C = 1.
<CVDDHHITT>-RECADR_P = 1.
<CVDDHHITT>-RECLAND_C = 1.
<CVDDHHITT>-RECCITY_C = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVDDHHITT-RECLAND_P, sy-vline,
  WA_CVDDHHITT-RECCITY_P, sy-vline,
  WA_CVDDHHITT-PDEST, sy-vline,
  WA_CVDDHHITT-RSPOID, sy-vline,
  WA_CVDDHHITT-SEDAT, sy-vline,
  WA_CVDDHHITT-SETIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVDDHHITT 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_CVDDHHITT 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_CVDDHHITT INTO WA_CVDDHHITT.


*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 SPDEV, internal->external for field PDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_CVDDHHITT-PDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CVDDHHITT-PDEST.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CVDDHHITT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CVDDHHITT-MATNR.
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_CVDDHHITT_STR, 
LOGID TYPE STRING,
RECADR_C TYPE STRING,
RECADR_P TYPE STRING,
RECLAND_C TYPE STRING,
RECCITY_C TYPE STRING,
RECLAND_P TYPE STRING,
RECCITY_P TYPE STRING,
PDEST TYPE STRING,
RSPOID TYPE STRING,
SEDAT TYPE STRING,
SETIM TYPE STRING,
DDOID TYPE STRING,
REPTYPE TYPE STRING,
REPSTATUS TYPE STRING,
MATNR TYPE STRING,
IPPERS TYPE STRING,
INITIATOR TYPE STRING,
CRDAT TYPE STRING,
CRTIM TYPE STRING,
STARTDAT TYPE STRING,
JOBID TYPE STRING,
DDOCNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVDDHHITT_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_CVDDHHITT_STR-LOGID sy-vline 
WA_CVDDHHITT_STR-RECADR_C sy-vline 
WA_CVDDHHITT_STR-RECADR_P sy-vline 
WA_CVDDHHITT_STR-RECLAND_C sy-vline 
WA_CVDDHHITT_STR-RECCITY_C sy-vline 
WA_CVDDHHITT_STR-RECLAND_P sy-vline 
WA_CVDDHHITT_STR-RECCITY_P sy-vline 
WA_CVDDHHITT_STR-PDEST sy-vline 
WA_CVDDHHITT_STR-RSPOID sy-vline 
WA_CVDDHHITT_STR-SEDAT sy-vline 
WA_CVDDHHITT_STR-SETIM sy-vline 
WA_CVDDHHITT_STR-DDOID sy-vline 
WA_CVDDHHITT_STR-REPTYPE sy-vline 
WA_CVDDHHITT_STR-REPSTATUS sy-vline 
WA_CVDDHHITT_STR-MATNR sy-vline 
WA_CVDDHHITT_STR-IPPERS sy-vline 
WA_CVDDHHITT_STR-INITIATOR sy-vline 
WA_CVDDHHITT_STR-CRDAT sy-vline 
WA_CVDDHHITT_STR-CRTIM sy-vline 
WA_CVDDHHITT_STR-STARTDAT sy-vline 
WA_CVDDHHITT_STR-JOBID sy-vline 
WA_CVDDHHITT_STR-DDOCNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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