ABAP Select data from SAP table CTCV_01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CTCV_01 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 CTCV_01. 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 CTCV_01 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_CTCV_01 TYPE STANDARD TABLE OF CTCV_01,
      WA_CTCV_01 TYPE CTCV_01,
      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: <CTCV_01> TYPE CTCV_01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CTCV_01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CTCV_01
  INTO TABLE IT_CTCV_01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CTCV_01
*  INTO TABLE @DATA(IT_CTCV_012).
*--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_CTCV_01 INDEX 1 INTO DATA(WA_CTCV_012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CTCV_01 ASSIGNING <CTCV_01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CTCV_01>-ATNAM = 1.
<CTCV_01>-ATBEZ = 1.
<CTCV_01>-ATFOR = 1.
<CTCV_01>-ANZST = 1.
<CTCV_01>-ANZDZ = 1.

ENDLOOP.

LOOP AT IT_CTCV_01 INTO WA_CTCV_01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CTCV_01-ATVOR, sy-vline,
  WA_CTCV_01-ATSCH, sy-vline,
  WA_CTCV_01-MSEHI, sy-vline,
  WA_CTCV_01-ATDEX, sy-vline,
  WA_CTCV_01-ATDIM, sy-vline,
  WA_CTCV_01-ATKLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CTCV_01 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_CTCV_01 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_CTCV_01 INTO WA_CTCV_01.


*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 CUNIT, internal->external for field MSEHI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CTCV_01-MSEHI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTCV_01-MSEHI.
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_CTCV_01_STR, 
ATNAM TYPE STRING,
ATBEZ TYPE STRING,
ATFOR TYPE STRING,
ANZST TYPE STRING,
ANZDZ TYPE STRING,
ATVOR TYPE STRING,
ATSCH TYPE STRING,
MSEHI TYPE STRING,
ATDEX TYPE STRING,
ATDIM TYPE STRING,
ATKLE TYPE STRING,
ATEIN TYPE STRING,
ATINT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CTCV_01_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_CTCV_01_STR-ATNAM sy-vline 
WA_CTCV_01_STR-ATBEZ sy-vline 
WA_CTCV_01_STR-ATFOR sy-vline 
WA_CTCV_01_STR-ANZST sy-vline 
WA_CTCV_01_STR-ANZDZ sy-vline 
WA_CTCV_01_STR-ATVOR sy-vline 
WA_CTCV_01_STR-ATSCH sy-vline 
WA_CTCV_01_STR-MSEHI sy-vline 
WA_CTCV_01_STR-ATDEX sy-vline 
WA_CTCV_01_STR-ATDIM sy-vline 
WA_CTCV_01_STR-ATKLE sy-vline 
WA_CTCV_01_STR-ATEIN sy-vline 
WA_CTCV_01_STR-ATINT sy-vline      INTO ld_text SEPARATED BY SPACE.

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