ABAP Select data from SAP table CNVC_JSTAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVC_JSTAT
*  INTO TABLE @DATA(IT_CNVC_JSTAT2).
*--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_CNVC_JSTAT INDEX 1 INTO DATA(WA_CNVC_JSTAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVC_JSTAT>-MANDT = 1.
<CNVC_JSTAT>-APPLICATION = 1.
<CNVC_JSTAT>-RUNID = 1.
<CNVC_JSTAT>-RFCDEST = 1.
<CNVC_JSTAT>-JOBCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVC_JSTAT-JOBNAME, sy-vline,
  WA_CNVC_JSTAT-STATUS, sy-vline,
  WA_CNVC_JSTAT-STRTDATE, sy-vline,
  WA_CNVC_JSTAT-STRTTIME, sy-vline,
  WA_CNVC_JSTAT-DDTEXT, sy-vline,
  WA_CNVC_JSTAT-PERCENTAGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVC_JSTAT 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_CNVC_JSTAT 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_CNVC_JSTAT INTO WA_CNVC_JSTAT.


*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_CNVC_JSTAT_STR, 
MANDT TYPE STRING,
APPLICATION TYPE STRING,
RUNID TYPE STRING,
RFCDEST TYPE STRING,
JOBCOUNT TYPE STRING,
JOBNAME TYPE STRING,
STATUS TYPE STRING,
STRTDATE TYPE STRING,
STRTTIME TYPE STRING,
DDTEXT TYPE STRING,
PERCENTAGE TYPE STRING,
LAST_ACTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVC_JSTAT_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_CNVC_JSTAT_STR-MANDT sy-vline 
WA_CNVC_JSTAT_STR-APPLICATION sy-vline 
WA_CNVC_JSTAT_STR-RUNID sy-vline 
WA_CNVC_JSTAT_STR-RFCDEST sy-vline 
WA_CNVC_JSTAT_STR-JOBCOUNT sy-vline 
WA_CNVC_JSTAT_STR-JOBNAME sy-vline 
WA_CNVC_JSTAT_STR-STATUS sy-vline 
WA_CNVC_JSTAT_STR-STRTDATE sy-vline 
WA_CNVC_JSTAT_STR-STRTTIME sy-vline 
WA_CNVC_JSTAT_STR-DDTEXT sy-vline 
WA_CNVC_JSTAT_STR-PERCENTAGE sy-vline 
WA_CNVC_JSTAT_STR-LAST_ACTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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