ABAP Select data from SAP table CNV_20100_CEFORM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNV_20100_CEFORM 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 CNV_20100_CEFORM. 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 CNV_20100_CEFORM 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_CNV_20100_CEFORM TYPE STANDARD TABLE OF CNV_20100_CEFORM,
      WA_CNV_20100_CEFORM TYPE CNV_20100_CEFORM,
      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: <CNV_20100_CEFORM> TYPE CNV_20100_CEFORM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNV_20100_CEFORM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNV_20100_CEFORM
  INTO TABLE IT_CNV_20100_CEFORM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_20100_CEFORM
*  INTO TABLE @DATA(IT_CNV_20100_CEFORM2).
*--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_CNV_20100_CEFORM INDEX 1 INTO DATA(WA_CNV_20100_CEFORM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNV_20100_CEFORM ASSIGNING <CNV_20100_CEFORM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_20100_CEFORM>-MANDT = 1.
<CNV_20100_CEFORM>-PACKID = 1.
<CNV_20100_CEFORM>-APPLCLASS = 1.
<CNV_20100_CEFORM>-SUBCLASS = 1.
<CNV_20100_CEFORM>-TABNAME = 1.

ENDLOOP.

LOOP AT IT_CNV_20100_CEFORM INTO WA_CNV_20100_CEFORM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_20100_CEFORM-FORM, sy-vline,
  WA_CNV_20100_CEFORM-POINTER, sy-vline,
  WA_CNV_20100_CEFORM-FIELD, sy-vline,
  WA_CNV_20100_CEFORM-SNR, sy-vline,
  WA_CNV_20100_CEFORM-SIGN, sy-vline,
  WA_CNV_20100_CEFORM-OPT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_20100_CEFORM 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_CNV_20100_CEFORM 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_CNV_20100_CEFORM INTO WA_CNV_20100_CEFORM.


*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_CNV_20100_CEFORM_STR, 
MANDT TYPE STRING,
PACKID TYPE STRING,
APPLCLASS TYPE STRING,
SUBCLASS TYPE STRING,
TABNAME TYPE STRING,
FORM TYPE STRING,
POINTER TYPE STRING,
FIELD TYPE STRING,
SNR TYPE STRING,
SIGN TYPE STRING,
OPT TYPE STRING,
LOW TYPE STRING,
HIGH TYPE STRING,
SETFLAG TYPE STRING,
SORT TYPE STRING,
FLLIST TYPE STRING,
HCLASS TYPE STRING,
HIENM TYPE STRING,
TYPE TYPE STRING,
VALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_20100_CEFORM_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_CNV_20100_CEFORM_STR-MANDT sy-vline 
WA_CNV_20100_CEFORM_STR-PACKID sy-vline 
WA_CNV_20100_CEFORM_STR-APPLCLASS sy-vline 
WA_CNV_20100_CEFORM_STR-SUBCLASS sy-vline 
WA_CNV_20100_CEFORM_STR-TABNAME sy-vline 
WA_CNV_20100_CEFORM_STR-FORM sy-vline 
WA_CNV_20100_CEFORM_STR-POINTER sy-vline 
WA_CNV_20100_CEFORM_STR-FIELD sy-vline 
WA_CNV_20100_CEFORM_STR-SNR sy-vline 
WA_CNV_20100_CEFORM_STR-SIGN sy-vline 
WA_CNV_20100_CEFORM_STR-OPT sy-vline 
WA_CNV_20100_CEFORM_STR-LOW sy-vline 
WA_CNV_20100_CEFORM_STR-HIGH sy-vline 
WA_CNV_20100_CEFORM_STR-SETFLAG sy-vline 
WA_CNV_20100_CEFORM_STR-SORT sy-vline 
WA_CNV_20100_CEFORM_STR-FLLIST sy-vline 
WA_CNV_20100_CEFORM_STR-HCLASS sy-vline 
WA_CNV_20100_CEFORM_STR-HIENM sy-vline 
WA_CNV_20100_CEFORM_STR-TYPE sy-vline 
WA_CNV_20100_CEFORM_STR-VALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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