ABAP Select data from SAP table CVD_CVCRH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVD_CVCRH
*  INTO TABLE @DATA(IT_CVD_CVCRH2).
*--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_CVD_CVCRH INDEX 1 INTO DATA(WA_CVD_CVCRH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CVD_CVCRH>-MANDT = 1.
<CVD_CVCRH>-REASONTYP = 1.
<CVD_CVCRH>-REASONCAT = 1.
<CVD_CVCRH>-REASONBPR = 1.
<CVD_CVCRH>-STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVD_CVCRH-PROCESSCAT, sy-vline,
  WA_CVD_CVCRH-RESFLG, sy-vline,
  WA_CVD_CVCRH-OCFLG, sy-vline,
  WA_CVD_CVCRH-SAVFLG, sy-vline,
  WA_CVD_CVCRH-RERFLG, sy-vline,
  WA_CVD_CVCRH-DDBFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVD_CVCRH 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_CVD_CVCRH 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_CVD_CVCRH INTO WA_CVD_CVCRH.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CVD_CVCRH_STR, 
MANDT TYPE STRING,
REASONTYP TYPE STRING,
REASONCAT TYPE STRING,
REASONBPR TYPE STRING,
STATUS TYPE STRING,
PROCESSCAT TYPE STRING,
RESFLG TYPE STRING,
OCFLG TYPE STRING,
SAVFLG TYPE STRING,
RERFLG TYPE STRING,
DDBFLG TYPE STRING,
HPFLG TYPE STRING,
ACKFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVD_CVCRH_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_CVD_CVCRH_STR-MANDT sy-vline 
WA_CVD_CVCRH_STR-REASONTYP sy-vline 
WA_CVD_CVCRH_STR-REASONCAT sy-vline 
WA_CVD_CVCRH_STR-REASONBPR sy-vline 
WA_CVD_CVCRH_STR-STATUS sy-vline 
WA_CVD_CVCRH_STR-PROCESSCAT sy-vline 
WA_CVD_CVCRH_STR-RESFLG sy-vline 
WA_CVD_CVCRH_STR-OCFLG sy-vline 
WA_CVD_CVCRH_STR-SAVFLG sy-vline 
WA_CVD_CVCRH_STR-RERFLG sy-vline 
WA_CVD_CVCRH_STR-DDBFLG sy-vline 
WA_CVD_CVCRH_STR-HPFLG sy-vline 
WA_CVD_CVCRH_STR-ACKFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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