ABAP Select data from SAP table PARAM_CNJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PARAM_CNJ
*  INTO TABLE @DATA(IT_PARAM_CNJ2).
*--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_PARAM_CNJ INDEX 1 INTO DATA(WA_PARAM_CNJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PARAM_CNJ>-HIEKZ = 1.
<PARAM_CNJ>-INCOR = 1.
<PARAM_CNJ>-INCVG = 1.
<PARAM_CNJ>-AOBKZ = 1.
<PARAM_CNJ>-INCNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PARAM_CNJ-STUFE, sy-vline,
  WA_PARAM_CNJ-NOSEL, sy-vline,
  WA_PARAM_CNJ-PRPS, sy-vline,
  WA_PARAM_CNJ-PSTX, sy-vline,
  WA_PARAM_CNJ-AUFK, sy-vline,
  WA_PARAM_CNJ-NETZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PARAM_CNJ 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_PARAM_CNJ 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_PARAM_CNJ INTO WA_PARAM_CNJ.


*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_PARAM_CNJ_STR, 
HIEKZ TYPE STRING,
INCOR TYPE STRING,
INCVG TYPE STRING,
AOBKZ TYPE STRING,
INCNT TYPE STRING,
STUFE TYPE STRING,
NOSEL TYPE STRING,
PRPS TYPE STRING,
PSTX TYPE STRING,
AUFK TYPE STRING,
NETZ TYPE STRING,
ACT TYPE STRING,
ELEM TYPE STRING,
AFAB TYPE STRING,
AFFH TYPE STRING,
RESB TYPE STRING,
KBED TYPE STRING,
PLAF TYPE STRING,
AFRU TYPE STRING,
PROJ TYPE STRING,
MLST TYPE STRING,
EVOF TYPE STRING,
EBKM TYPE STRING,
SDOR TYPE STRING,
COST TYPE STRING,
DRILLDOWN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PARAM_CNJ_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_PARAM_CNJ_STR-HIEKZ sy-vline 
WA_PARAM_CNJ_STR-INCOR sy-vline 
WA_PARAM_CNJ_STR-INCVG sy-vline 
WA_PARAM_CNJ_STR-AOBKZ sy-vline 
WA_PARAM_CNJ_STR-INCNT sy-vline 
WA_PARAM_CNJ_STR-STUFE sy-vline 
WA_PARAM_CNJ_STR-NOSEL sy-vline 
WA_PARAM_CNJ_STR-PRPS sy-vline 
WA_PARAM_CNJ_STR-PSTX sy-vline 
WA_PARAM_CNJ_STR-AUFK sy-vline 
WA_PARAM_CNJ_STR-NETZ sy-vline 
WA_PARAM_CNJ_STR-ACT sy-vline 
WA_PARAM_CNJ_STR-ELEM sy-vline 
WA_PARAM_CNJ_STR-AFAB sy-vline 
WA_PARAM_CNJ_STR-AFFH sy-vline 
WA_PARAM_CNJ_STR-RESB sy-vline 
WA_PARAM_CNJ_STR-KBED sy-vline 
WA_PARAM_CNJ_STR-PLAF sy-vline 
WA_PARAM_CNJ_STR-AFRU sy-vline 
WA_PARAM_CNJ_STR-PROJ sy-vline 
WA_PARAM_CNJ_STR-MLST sy-vline 
WA_PARAM_CNJ_STR-EVOF sy-vline 
WA_PARAM_CNJ_STR-EBKM sy-vline 
WA_PARAM_CNJ_STR-SDOR sy-vline 
WA_PARAM_CNJ_STR-COST sy-vline 
WA_PARAM_CNJ_STR-DRILLDOWN sy-vline      INTO ld_text SEPARATED BY SPACE.

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