ABAP Select data from SAP table CNO1ACT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNO1ACT 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 CNO1ACT. 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 CNO1ACT 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_CNO1ACT TYPE STANDARD TABLE OF CNO1ACT,
      WA_CNO1ACT TYPE CNO1ACT,
      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: <CNO1ACT> TYPE CNO1ACT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNO1ACT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNO1ACT
  INTO TABLE IT_CNO1ACT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNO1ACT
*  INTO TABLE @DATA(IT_CNO1ACT2).
*--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_CNO1ACT INDEX 1 INTO DATA(WA_CNO1ACT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNO1ACT ASSIGNING <CNO1ACT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNO1ACT>-POSID = 1.
<CNO1ACT>-POST1 = 1.
<CNO1ACT>-AUFNR = 1.
<CNO1ACT>-KTEXT = 1.
<CNO1ACT>-ACTIVITY = 1.

ENDLOOP.

LOOP AT IT_CNO1ACT INTO WA_CNO1ACT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNO1ACT-SUB_ACTIVI, sy-vline,
  WA_CNO1ACT-LTXA1, sy-vline,
  WA_CNO1ACT-ARBEI, sy-vline,
  WA_CNO1ACT-ISMNW, sy-vline,
  WA_CNO1ACT-OFMNW, sy-vline,
  WA_CNO1ACT-REST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNO1ACT 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_CNO1ACT 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_CNO1ACT INTO WA_CNO1ACT.


*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.

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNO1ACT-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNO1ACT-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNO1ACT-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNO1ACT-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field ACTIVITY
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CNO1ACT-ACTIVITY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNO1ACT-ACTIVITY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field SUB_ACTIVI
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CNO1ACT-SUB_ACTIVI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNO1ACT-SUB_ACTIVI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ARBEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNO1ACT-ARBEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNO1ACT-ARBEH.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CNO1ACT_STR, 
POSID TYPE STRING,
POST1 TYPE STRING,
AUFNR TYPE STRING,
KTEXT TYPE STRING,
ACTIVITY TYPE STRING,
SUB_ACTIVI TYPE STRING,
LTXA1 TYPE STRING,
ARBEI TYPE STRING,
ISMNW TYPE STRING,
OFMNW TYPE STRING,
REST TYPE STRING,
ARBEH TYPE STRING,
ABARB TYPE STRING,
FIN_CONF TYPE STRING,
FSAVD TYPE STRING,
FSEDD TYPE STRING,
SSAVD TYPE STRING,
SSEDD TYPE STRING,
ISDD TYPE STRING,
IEDD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNO1ACT_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_CNO1ACT_STR-POSID sy-vline 
WA_CNO1ACT_STR-POST1 sy-vline 
WA_CNO1ACT_STR-AUFNR sy-vline 
WA_CNO1ACT_STR-KTEXT sy-vline 
WA_CNO1ACT_STR-ACTIVITY sy-vline 
WA_CNO1ACT_STR-SUB_ACTIVI sy-vline 
WA_CNO1ACT_STR-LTXA1 sy-vline 
WA_CNO1ACT_STR-ARBEI sy-vline 
WA_CNO1ACT_STR-ISMNW sy-vline 
WA_CNO1ACT_STR-OFMNW sy-vline 
WA_CNO1ACT_STR-REST sy-vline 
WA_CNO1ACT_STR-ARBEH sy-vline 
WA_CNO1ACT_STR-ABARB sy-vline 
WA_CNO1ACT_STR-FIN_CONF sy-vline 
WA_CNO1ACT_STR-FSAVD sy-vline 
WA_CNO1ACT_STR-FSEDD sy-vline 
WA_CNO1ACT_STR-SSAVD sy-vline 
WA_CNO1ACT_STR-SSEDD sy-vline 
WA_CNO1ACT_STR-ISDD sy-vline 
WA_CNO1ACT_STR-IEDD sy-vline      INTO ld_text SEPARATED BY SPACE.

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