ABAP Select data from SAP table CNVSTATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVSTATE
*  INTO TABLE @DATA(IT_CNVSTATE2).
*--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_CNVSTATE INDEX 1 INTO DATA(WA_CNVSTATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVSTATE>-MANDT = 1.
<CNVSTATE>-PACKID = 1.
<CNVSTATE>-PHASE = 1.
<CNVSTATE>-TABNAME = 1.
<CNVSTATE>-PROGNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVSTATE-TASKID, sy-vline,
  WA_CNVSTATE-RERUN, sy-vline,
  WA_CNVSTATE-PRECURSOR, sy-vline,
  WA_CNVSTATE-PRETABNAME, sy-vline,
  WA_CNVSTATE-JOBNAME, sy-vline,
  WA_CNVSTATE-JOBCOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVSTATE 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_CNVSTATE 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_CNVSTATE INTO WA_CNVSTATE.


*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_CNVSTATE_STR, 
MANDT TYPE STRING,
PACKID TYPE STRING,
PHASE TYPE STRING,
TABNAME TYPE STRING,
PROGNAME TYPE STRING,
TASKID TYPE STRING,
RERUN TYPE STRING,
PRECURSOR TYPE STRING,
PRETABNAME TYPE STRING,
JOBNAME TYPE STRING,
JOBCOUNT TYPE STRING,
SERVER TYPE STRING,
RUNMODE TYPE STRING,
STATE_TEC TYPE STRING,
STATE_LOG TYPE STRING,
STARTTIME TYPE STRING,
ENDTIME TYPE STRING,
DURATION TYPE STRING,
RECSELECT TYPE STRING,
RECTOTAL TYPE STRING,
RECREAD TYPE STRING,
RECUPD TYPE STRING,
RECDUMWRITE TYPE STRING,
RECDUMREAD TYPE STRING,
RECCOUNT1 TYPE STRING,
RECCOUNT2 TYPE STRING,
RERUNARG TYPE STRING,
TABID TYPE STRING,
CLUID_MIN TYPE STRING,
CLUID_MAX TYPE STRING,
PROGTYPE TYPE STRING,
UPDTYPE TYPE STRING,
MULTIPROG TYPE STRING,
GENTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVSTATE_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_CNVSTATE_STR-MANDT sy-vline 
WA_CNVSTATE_STR-PACKID sy-vline 
WA_CNVSTATE_STR-PHASE sy-vline 
WA_CNVSTATE_STR-TABNAME sy-vline 
WA_CNVSTATE_STR-PROGNAME sy-vline 
WA_CNVSTATE_STR-TASKID sy-vline 
WA_CNVSTATE_STR-RERUN sy-vline 
WA_CNVSTATE_STR-PRECURSOR sy-vline 
WA_CNVSTATE_STR-PRETABNAME sy-vline 
WA_CNVSTATE_STR-JOBNAME sy-vline 
WA_CNVSTATE_STR-JOBCOUNT sy-vline 
WA_CNVSTATE_STR-SERVER sy-vline 
WA_CNVSTATE_STR-RUNMODE sy-vline 
WA_CNVSTATE_STR-STATE_TEC sy-vline 
WA_CNVSTATE_STR-STATE_LOG sy-vline 
WA_CNVSTATE_STR-STARTTIME sy-vline 
WA_CNVSTATE_STR-ENDTIME sy-vline 
WA_CNVSTATE_STR-DURATION sy-vline 
WA_CNVSTATE_STR-RECSELECT sy-vline 
WA_CNVSTATE_STR-RECTOTAL sy-vline 
WA_CNVSTATE_STR-RECREAD sy-vline 
WA_CNVSTATE_STR-RECUPD sy-vline 
WA_CNVSTATE_STR-RECDUMWRITE sy-vline 
WA_CNVSTATE_STR-RECDUMREAD sy-vline 
WA_CNVSTATE_STR-RECCOUNT1 sy-vline 
WA_CNVSTATE_STR-RECCOUNT2 sy-vline 
WA_CNVSTATE_STR-RERUNARG sy-vline 
WA_CNVSTATE_STR-TABID sy-vline 
WA_CNVSTATE_STR-CLUID_MIN sy-vline 
WA_CNVSTATE_STR-CLUID_MAX sy-vline 
WA_CNVSTATE_STR-PROGTYPE sy-vline 
WA_CNVSTATE_STR-UPDTYPE sy-vline 
WA_CNVSTATE_STR-MULTIPROG sy-vline 
WA_CNVSTATE_STR-GENTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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