ABAP Select data from SAP table WSAGENT_CONFIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSAGENT_CONFIG
*  INTO TABLE @DATA(IT_WSAGENT_CONFIG2).
*--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_WSAGENT_CONFIG INDEX 1 INTO DATA(WA_WSAGENT_CONFIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSAGENT_CONFIG>-CONTROLLER = 1.
<WSAGENT_CONFIG>-AGENT_PLUGIN_ENABLED = 1.
<WSAGENT_CONFIG>-IS_INIT = 1.
<WSAGENT_CONFIG>-AGENT_TYPE = 1.
<WSAGENT_CONFIG>-AGENT_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSAGENT_CONFIG-VERSION, sy-vline,
  WA_WSAGENT_CONFIG-PATCH_TEXT, sy-vline,
  WA_WSAGENT_CONFIG-OPERATING_SYSTEM, sy-vline,
  WA_WSAGENT_CONFIG-WORK_DIR, sy-vline,
  WA_WSAGENT_CONFIG-LOG_FILE_NAME, sy-vline,
  WA_WSAGENT_CONFIG-CSMCONF_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSAGENT_CONFIG 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_WSAGENT_CONFIG 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_WSAGENT_CONFIG INTO WA_WSAGENT_CONFIG.


*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_WSAGENT_CONFIG_STR, 
CONTROLLER TYPE STRING,
AGENT_PLUGIN_ENABLED TYPE STRING,
IS_INIT TYPE STRING,
AGENT_TYPE TYPE STRING,
AGENT_NAME TYPE STRING,
VERSION TYPE STRING,
PATCH_TEXT TYPE STRING,
OPERATING_SYSTEM TYPE STRING,
WORK_DIR TYPE STRING,
LOG_FILE_NAME TYPE STRING,
CSMCONF_NAME TYPE STRING,
INIFILE_NAME TYPE STRING,
LOCAL_HOST_NAME TYPE STRING,
INSTANCE_TYPE TYPE STRING,
MANAGED_SAP_SYS_NR TYPE STRING,
MGD_SYSTEM_NAME TYPE STRING,
MGD_SYSTEM_NAME_MULTIPLE_C11S TYPE STRING,
CONNECTED_TO_SHARED_MEMORY TYPE STRING,
SHARED_MEMORY_SIZE TYPE STRING,
CENTRAL_CCMSATTACHED TYPE STRING,
NUMBER_OF_CENS TYPE STRING,
LIST_OF_CENTRAL_SYSTEMS TYPE STRING,
CONTROLLER TYPE STRING,
ITEM TYPE STRING,
CUSTOMIZING_IN_LOCAL_SYSTEM TYPE STRING,
SEMAPHORES_ENABLED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSAGENT_CONFIG_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_WSAGENT_CONFIG_STR-CONTROLLER sy-vline 
WA_WSAGENT_CONFIG_STR-AGENT_PLUGIN_ENABLED sy-vline 
WA_WSAGENT_CONFIG_STR-IS_INIT sy-vline 
WA_WSAGENT_CONFIG_STR-AGENT_TYPE sy-vline 
WA_WSAGENT_CONFIG_STR-AGENT_NAME sy-vline 
WA_WSAGENT_CONFIG_STR-VERSION sy-vline 
WA_WSAGENT_CONFIG_STR-PATCH_TEXT sy-vline 
WA_WSAGENT_CONFIG_STR-OPERATING_SYSTEM sy-vline 
WA_WSAGENT_CONFIG_STR-WORK_DIR sy-vline 
WA_WSAGENT_CONFIG_STR-LOG_FILE_NAME sy-vline 
WA_WSAGENT_CONFIG_STR-CSMCONF_NAME sy-vline 
WA_WSAGENT_CONFIG_STR-INIFILE_NAME sy-vline 
WA_WSAGENT_CONFIG_STR-LOCAL_HOST_NAME sy-vline 
WA_WSAGENT_CONFIG_STR-INSTANCE_TYPE sy-vline 
WA_WSAGENT_CONFIG_STR-MANAGED_SAP_SYS_NR sy-vline 
WA_WSAGENT_CONFIG_STR-MGD_SYSTEM_NAME sy-vline 
WA_WSAGENT_CONFIG_STR-MGD_SYSTEM_NAME_MULTIPLE_C11S sy-vline 
WA_WSAGENT_CONFIG_STR-CONNECTED_TO_SHARED_MEMORY sy-vline 
WA_WSAGENT_CONFIG_STR-SHARED_MEMORY_SIZE sy-vline 
WA_WSAGENT_CONFIG_STR-CENTRAL_CCMSATTACHED sy-vline 
WA_WSAGENT_CONFIG_STR-NUMBER_OF_CENS sy-vline 
WA_WSAGENT_CONFIG_STR-LIST_OF_CENTRAL_SYSTEMS sy-vline 
WA_WSAGENT_CONFIG_STR-CONTROLLER sy-vline 
WA_WSAGENT_CONFIG_STR-ITEM sy-vline 
WA_WSAGENT_CONFIG_STR-CUSTOMIZING_IN_LOCAL_SYSTEM sy-vline 
WA_WSAGENT_CONFIG_STR-SEMAPHORES_ENABLED sy-vline      INTO ld_text SEPARATED BY SPACE.

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