ABAP Select data from SAP table AAPPTACT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AAPPTACT 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 AAPPTACT. 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 AAPPTACT 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_AAPPTACT TYPE STANDARD TABLE OF AAPPTACT,
      WA_AAPPTACT TYPE AAPPTACT,
      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: <AAPPTACT> TYPE AAPPTACT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AAPPTACT
*  INTO TABLE @DATA(IT_AAPPTACT2).
*--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_AAPPTACT INDEX 1 INTO DATA(WA_AAPPTACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AAPPTACT>-MANDT = 1.
<AAPPTACT>-APPOINTMENTACTIVITY = 1.
<AAPPTACT>-APPOINTMENTACTIVITYTYPE = 1.
<AAPPTACT>-APPOINTMENTACTIVITYUUID = 1.
<AAPPTACT>-APPOINTMENTACTIVITYDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AAPPTACT-CUSTMGMTACTIVITYCATEGORY, sy-vline,
  WA_AAPPTACT-CUSTMGMTACTIVITYPRIORITY, sy-vline,
  WA_AAPPTACT-CUSTMGMTACTIVITYISPRIVATE, sy-vline,
  WA_AAPPTACT-CUSTMGMTACTYISDSPDINCALENDAR, sy-vline,
  WA_AAPPTACT-APPTACTIVITYLOCATIONTEXT, sy-vline,
  WA_AAPPTACT-ACCOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AAPPTACT 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_AAPPTACT 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_AAPPTACT INTO WA_AAPPTACT.


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

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

*Conversion exit ALPHA, internal->external for field CONTACTPERSON
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AAPPTACT-CONTACTPERSON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AAPPTACT-CONTACTPERSON.
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_AAPPTACT_STR, 
MANDT TYPE STRING,
APPOINTMENTACTIVITY TYPE STRING,
APPOINTMENTACTIVITYTYPE TYPE STRING,
APPOINTMENTACTIVITYUUID TYPE STRING,
APPOINTMENTACTIVITYDESCRIPTION TYPE STRING,
CUSTMGMTACTIVITYCATEGORY TYPE STRING,
CUSTMGMTACTIVITYPRIORITY TYPE STRING,
CUSTMGMTACTIVITYISPRIVATE TYPE STRING,
CUSTMGMTACTYISDSPDINCALENDAR TYPE STRING,
APPTACTIVITYLOCATIONTEXT TYPE STRING,
ACCOUNT TYPE STRING,
CONTACTPERSON TYPE STRING,
APPOINTMENTACTIVITYISCOMPLETED TYPE STRING,
APPOINTMENTACTIVITYISREJECTED TYPE STRING,
CUSTMGMTACTIVITYSTARTDATETIME TYPE STRING,
CUSTMGMTACTIVITYENDDATETIME TYPE STRING,
RESPONSIBLESALESORGANIZATION TYPE STRING,
SERVICEORGANIZATION TYPE STRING,
RESPONSIBLESERVICEORGANIZATION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
DIVISION TYPE STRING,
SALESORGANIZATIONORGUNITID TYPE STRING,
SALESOFFICEORGUNITID TYPE STRING,
SALESGROUPORGUNITID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AAPPTACT_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_AAPPTACT_STR-MANDT sy-vline 
WA_AAPPTACT_STR-APPOINTMENTACTIVITY sy-vline 
WA_AAPPTACT_STR-APPOINTMENTACTIVITYTYPE sy-vline 
WA_AAPPTACT_STR-APPOINTMENTACTIVITYUUID sy-vline 
WA_AAPPTACT_STR-APPOINTMENTACTIVITYDESCRIPTION sy-vline 
WA_AAPPTACT_STR-CUSTMGMTACTIVITYCATEGORY sy-vline 
WA_AAPPTACT_STR-CUSTMGMTACTIVITYPRIORITY sy-vline 
WA_AAPPTACT_STR-CUSTMGMTACTIVITYISPRIVATE sy-vline 
WA_AAPPTACT_STR-CUSTMGMTACTYISDSPDINCALENDAR sy-vline 
WA_AAPPTACT_STR-APPTACTIVITYLOCATIONTEXT sy-vline 
WA_AAPPTACT_STR-ACCOUNT sy-vline 
WA_AAPPTACT_STR-CONTACTPERSON sy-vline 
WA_AAPPTACT_STR-APPOINTMENTACTIVITYISCOMPLETED sy-vline 
WA_AAPPTACT_STR-APPOINTMENTACTIVITYISREJECTED sy-vline 
WA_AAPPTACT_STR-CUSTMGMTACTIVITYSTARTDATETIME sy-vline 
WA_AAPPTACT_STR-CUSTMGMTACTIVITYENDDATETIME sy-vline 
WA_AAPPTACT_STR-RESPONSIBLESALESORGANIZATION sy-vline 
WA_AAPPTACT_STR-SERVICEORGANIZATION sy-vline 
WA_AAPPTACT_STR-RESPONSIBLESERVICEORGANIZATION sy-vline 
WA_AAPPTACT_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_AAPPTACT_STR-DIVISION sy-vline 
WA_AAPPTACT_STR-SALESORGANIZATIONORGUNITID sy-vline 
WA_AAPPTACT_STR-SALESOFFICEORGUNITID sy-vline 
WA_AAPPTACT_STR-SALESGROUPORGUNITID sy-vline      INTO ld_text SEPARATED BY SPACE.

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