ABAP Select data from SAP table CLCMDOCCATVH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLCMDOCCATVH
*  INTO TABLE @DATA(IT_CLCMDOCCATVH2).
*--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_CLCMDOCCATVH INDEX 1 INTO DATA(WA_CLCMDOCCATVH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLCMDOCCATVH>-MANDT = 1.
<CLCMDOCCATVH>-LGLCNTNTMCATEGORY = 1.
<CLCMDOCCATVH>-LGLCNTNTMCATEGORYNAME = 1.
<CLCMDOCCATVH>-LGLCNTNTMCATEGORYNAMESYST = 1.
<CLCMDOCCATVH>-LGLCNTNTMCATEGORYNAMEINENGLISH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLCMDOCCATVH-LGLCNTNTMPARENTCATEGORY, sy-vline,
  WA_CLCMDOCCATVH-LGLCNTNTMPARENTCATEGORYTEXT, sy-vline,
  WA_CLCMDOCCATVH-LGLCNTNTMPARCATSYSTNAME, sy-vline,
  WA_CLCMDOCCATVH-LGLCNTNTMPARCATENGLISHNAME, sy-vline,
  WA_CLCMDOCCATVH-LGLCNTNTMROOTCATEGORYNAME, sy-vline,
  WA_CLCMDOCCATVH-LGLCNTNTMROOTCATENGLISHNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLCMDOCCATVH 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_CLCMDOCCATVH 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_CLCMDOCCATVH INTO WA_CLCMDOCCATVH.


*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_CLCMDOCCATVH_STR, 
MANDT TYPE STRING,
LGLCNTNTMCATEGORY TYPE STRING,
LGLCNTNTMCATEGORYNAME TYPE STRING,
LGLCNTNTMCATEGORYNAMESYST TYPE STRING,
LGLCNTNTMCATEGORYNAMEINENGLISH TYPE STRING,
LGLCNTNTMPARENTCATEGORY TYPE STRING,
LGLCNTNTMPARENTCATEGORYTEXT TYPE STRING,
LGLCNTNTMPARCATSYSTNAME TYPE STRING,
LGLCNTNTMPARCATENGLISHNAME TYPE STRING,
LGLCNTNTMROOTCATEGORYNAME TYPE STRING,
LGLCNTNTMROOTCATENGLISHNAME TYPE STRING,
LGLCNTNTMCATPURPOSE TYPE STRING,
LGLCNTNTMCATISMULTISELECTION TYPE STRING,
LGLCNTNTMCATEGORYPATH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLCMDOCCATVH_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_CLCMDOCCATVH_STR-MANDT sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMCATEGORY sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMCATEGORYNAME sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMCATEGORYNAMESYST sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMCATEGORYNAMEINENGLISH sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMPARENTCATEGORY sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMPARENTCATEGORYTEXT sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMPARCATSYSTNAME sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMPARCATENGLISHNAME sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMROOTCATEGORYNAME sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMROOTCATENGLISHNAME sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMCATPURPOSE sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMCATISMULTISELECTION sy-vline 
WA_CLCMDOCCATVH_STR-LGLCNTNTMCATEGORYPATH sy-vline      INTO ld_text SEPARATED BY SPACE.

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