ABAP Select data from SAP table DB6_VIEW_INSTANCE_DATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6_VIEW_INSTANCE_DATA 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 DB6_VIEW_INSTANCE_DATA. 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 DB6_VIEW_INSTANCE_DATA 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_DB6_VIEW_INSTANCE_DATA TYPE STANDARD TABLE OF DB6_VIEW_INSTANCE_DATA,
      WA_DB6_VIEW_INSTANCE_DATA TYPE DB6_VIEW_INSTANCE_DATA,
      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: <DB6_VIEW_INSTANCE_DATA> TYPE DB6_VIEW_INSTANCE_DATA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6_VIEW_INSTANCE_DATA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6_VIEW_INSTANCE_DATA
  INTO TABLE IT_DB6_VIEW_INSTANCE_DATA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6_VIEW_INSTANCE_DATA
*  INTO TABLE @DATA(IT_DB6_VIEW_INSTANCE_DATA2).
*--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_DB6_VIEW_INSTANCE_DATA INDEX 1 INTO DATA(WA_DB6_VIEW_INSTANCE_DATA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6_VIEW_INSTANCE_DATA ASSIGNING <DB6_VIEW_INSTANCE_DATA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6_VIEW_INSTANCE_DATA>-INSTANCE_INFO = 1.
<DB6_VIEW_INSTANCE_DATA>-INST_NAME = 1.
<DB6_VIEW_INSTANCE_DATA>-IS_INST_PARTITIONABLE = 1.
<DB6_VIEW_INSTANCE_DATA>-NUM_DBPARTITIONS = 1.
<DB6_VIEW_INSTANCE_DATA>-INST_PTR_SIZE = 1.

ENDLOOP.

LOOP AT IT_DB6_VIEW_INSTANCE_DATA INTO WA_DB6_VIEW_INSTANCE_DATA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6_VIEW_INSTANCE_DATA-RELEASE_NUM, sy-vline,
  WA_DB6_VIEW_INSTANCE_DATA-SERVICE_LEVEL, sy-vline,
  WA_DB6_VIEW_INSTANCE_DATA-BLD_LEVEL, sy-vline,
  WA_DB6_VIEW_INSTANCE_DATA-PTF, sy-vline,
  WA_DB6_VIEW_INSTANCE_DATA-FIXPACK_NUM, sy-vline,
  WA_DB6_VIEW_INSTANCE_DATA-NUM_MEMBERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6_VIEW_INSTANCE_DATA 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_DB6_VIEW_INSTANCE_DATA 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_DB6_VIEW_INSTANCE_DATA INTO WA_DB6_VIEW_INSTANCE_DATA.


*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_DB6_VIEW_INSTANCE_DATA_STR, 
INSTANCE_INFO TYPE STRING,
INST_NAME TYPE STRING,
IS_INST_PARTITIONABLE TYPE STRING,
NUM_DBPARTITIONS TYPE STRING,
INST_PTR_SIZE TYPE STRING,
RELEASE_NUM TYPE STRING,
SERVICE_LEVEL TYPE STRING,
BLD_LEVEL TYPE STRING,
PTF TYPE STRING,
FIXPACK_NUM TYPE STRING,
NUM_MEMBERS TYPE STRING,
SYSTEM_INFO TYPE STRING,
HADR_INFO TYPE STRING,
DBPARTITIONNUM TYPE STRING,
HADR_CONNECT_STATUS TYPE STRING,
HADR_CONNECT_TIME TYPE STRING,
HADR_HEARTBEAT TYPE STRING,
HADR_LOCAL_HOST TYPE STRING,
HADR_LOCAL_SERVICE TYPE STRING,
HADR_LOG_GAP TYPE STRING,
HADR_PRIMARY_LOG_FILE TYPE STRING,
HADR_PRIMARY_LOG_LSN TYPE STRING,
HADR_PRIMARY_LOG_PAGE TYPE STRING,
HADR_REMOTE_HOST TYPE STRING,
HADR_REMOTE_INSTANCE TYPE STRING,
HADR_REMOTE_SERVICE TYPE STRING,
HADR_ROLE TYPE STRING,
HADR_STANDBY_LOG_FILE TYPE STRING,
HADR_STANDBY_LOG_LSN TYPE STRING,
HADR_STANDBY_LOG_PAGE TYPE STRING,
HADR_STATE TYPE STRING,
HADR_SYNCMODE TYPE STRING,
HADR_TIMEOUT TYPE STRING,
HADR_INFO_VISIBLE TYPE STRING,
SINGLE_SYSTEM_INFO TYPE STRING,
PARTITN TYPE STRING,
OS_NAME TYPE STRING,
OS_VERSION TYPE STRING,
OS_RELEASE TYPE STRING,
HOST_NAME TYPE STRING,
TOTAL_CPUS TYPE STRING,
CONFIGURED_CPUS TYPE STRING,
TOTAL_MEMORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6_VIEW_INSTANCE_DATA_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_DB6_VIEW_INSTANCE_DATA_STR-INSTANCE_INFO sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-INST_NAME sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-IS_INST_PARTITIONABLE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-NUM_DBPARTITIONS sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-INST_PTR_SIZE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-RELEASE_NUM sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-SERVICE_LEVEL sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-BLD_LEVEL sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-PTF sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-FIXPACK_NUM sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-NUM_MEMBERS sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-SYSTEM_INFO sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_INFO sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-DBPARTITIONNUM sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_CONNECT_STATUS sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_CONNECT_TIME sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_HEARTBEAT sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_LOCAL_HOST sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_LOCAL_SERVICE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_LOG_GAP sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_PRIMARY_LOG_FILE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_PRIMARY_LOG_LSN sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_PRIMARY_LOG_PAGE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_REMOTE_HOST sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_REMOTE_INSTANCE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_REMOTE_SERVICE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_ROLE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_STANDBY_LOG_FILE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_STANDBY_LOG_LSN sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_STANDBY_LOG_PAGE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_STATE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_SYNCMODE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_TIMEOUT sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HADR_INFO_VISIBLE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-SINGLE_SYSTEM_INFO sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-PARTITN sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-OS_NAME sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-OS_VERSION sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-OS_RELEASE sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-HOST_NAME sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-TOTAL_CPUS sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-CONFIGURED_CPUS sy-vline 
WA_DB6_VIEW_INSTANCE_DATA_STR-TOTAL_MEMORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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