http://www.oracle-wiki.net/startdocsdefaultschemas
ACKGROUND
When an 11g database is created withouttweakingany of the options,using eitherdbcaor theinstaller,the schema listed in the table below,36 of them(!),are created by default.
This document gives an overview of their purpose and function and,should the functionailty not be required,whether they can be safely deleted*or not without compromising the fundamental operation of the database. Additionally,having been removed,if a schema is required again,there are details of which script(s) are required to be run in order to recreate*it.
As well as the schema installed by default,there are features that may need to be installed. The schema required to perform these functions,their purpose and installation scripts are described in theOther Administrative Schemasection below.
[@more@]
*IMPORTANT
Removal of schema marked Safe To Remove may require further actions than that of simply dropping the user.
Installation of certain functionality may require further actions than that of simply running the scripts cited below.
Consult the appropriate Oracle documentation for the full set of removal and/or installation steps.
DEFAULT SCHEMA
| USER NAME | DEFAULT TABLESPACE | TEMPORARY TABLESPACE | LOCKED? | DBA? |
|---|---|---|---|---|
| ANONYMOUS | SYSAUX | TEMP | YES | |
| APEX_030200 | SYSAUX | TEMP | YES | |
| APEX_PUBLIC_USER | USERS | TEMP | YES | |
| APPQOSSYS | SYSAUX | TEMP | YES | |
| BI | USERS | TEMP | YES | |
| CTXSYS | SYSAUX | TEMP | YES | |
| DBSNMP | SYSTEM | TEMP | ||
| DIP | USERS | TEMP | YES | |
| EXFSYS | SYSAUX | TEMP | YES | |
| FLOWS_FILES | SYSAUX | TEMP | YES | |
| HR | USERS | TEMP | YES | |
| IX | USERS | TEMP | YES | |
| MDDATA | USERS | TEMP | YES | |
| MDSYS | SYSAUX | TEMP | YES | |
| MGMT_VIEW | SYSTEM | TEMP | ||
| OE | USERS | TEMP | YES | |
| OLAPSYS | SYSAUX | TEMP | YES | |
| ORACLE_OCM | USERS | TEMP | YES | |
| ORDDATA | SYSAUX | TEMP | YES | |
| ORDPLUGINS | SYSAUX | TEMP | YES | |
| ORDSYS | SYSAUX | TEMP | YES | |
| OUTLN | SYSTEM | TEMP | YES | |
| OWBSYS | SYSAUX | TEMP | YES | |
| OWBSYS_AUDIT | SYSAUX | TEMP | YES | |
| PM | USERS | TEMP | YES | |
| SCOTT | USERS | TEMP | YES | |
| SH | USERS | TEMP | YES | |
| SI_INFORMTN_SCHEMA | SYSAUX | TEMP | YES | |
| SPATIAL_CSW_ADMIN_USR | USERS | TEMP | YES | |
| SPATIAL_WFS_ADMIN_USR | USERS | TEMP | YES | |
| SYS | SYSTEM | TEMP | YES | |
| SYSMAN | SYSAUX | TEMP | ||
| SYSTEM | SYSTEM | TEMP | YES | |
| WMSYS | SYSAUX | TEMP | YES | |
| XDB | SYSAUX | TEMP | YES | |
| XS$NULL | USERS | TEMP | YES |
SCHEMA OVERVIEW
ANONYMOUS
Purpose:
Account that allows HTTP access to Oracle XML DB. It is used in place of theAPEX_PUBLIC_USERaccount when the Embedded PL/SQL Gateway (EPG) is installed in the database. EPG is a Web server that can be used with Oracle Database. It provides the necessary infrastructure to create dynamic applications. See alsoXDB.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/catqm.sql
APEX_030200
Purpose:
Part of the Oracle Application Express Suite - (Oracle APEX,previously named Oracle HTML DB) which is a freeware software development environment. It allows a fast development cycle to be achieved to create web based applications. The account owns the Application Express schema and metadata. See alsoAPEX_PUBLIC_USERandFLOW_FILES.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/apex/apexins.sql
APEX_PUBLIC_USER
Purpose:
Part of the Oracle Application Express Suite - (Oracle APEX,previously named Oracle HTML DB) which is a freeware software development environment. It allows a fast development cycle to be achieved to create web based applications. This minimally privileged account is used for Application Express configuration with Oracle HTTP Server and mod_plsql. See alsoAPEX_030200and
APPQOSSYS
Purpose:
Used for storing/managing all data and metadata required by Oracle Quality of Service Management.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_ADMIN/rdbms/admin/catqos.sql
BI
Purpose:
Safe To Remove:
Yes �C run$ORACLE_HOME/demo/schema/drop_sch.sql
Recreation Script:
$ORACLE_HOME/demo/schema/bus_intelligence/bi_main.sql
CTXSYS
Purpose:
The account used to administer Oracle Text. Oracle Text enables the building of text query applications and document classification applications. It provides indexing,word and theme searching,and viewing capabilities for text.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ctx/admin/ctxsys.sql
DBSNMP
Purpose:
The account used by the Management Agent component of Oracle Enterprise Manager to monitor and manage the database. Password is created at installation or database creation time.
Safe To Remove:
Yes �C run$ORACLE_HOME/rdbms/admin/catnsnmp.sql
Recreation Script:
$ORACLE_HOME/rdbms/admin/catsnmp.sql
DIP
Purpose:
The account used by the Directory Integration Platform (DIP) to synchronize the changes in Oracle Internet Directory with the applications in the database.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/catdip.sql
EXFSYS
Purpose:
The account used internally to access the EXFSYS schema,which is associated with the Rules Manager and Expression Filter feature. This feature enables the building of complex PL/SQL rules and expressions. The EXFSYS schema contains the Rules Manager and Expression Filter DDL,DML,and associated metadata.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/exfsys.sql
FLOW_FILES
Purpose:
Part of the Oracle Application Express Suite - (Oracle APEX,previously named Oracle HTML DB) which is a freeware software development environment. It allows a fast development cycle to be achieved to create web based applications. This account owns the Application Express uploaded files. See alsoAPEX_030200andAPEX_PUBLIC_USER.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/apex/apexins.sql
HR
Purpose:
The account that owns the Human Resources schema included in the Oracle Sample Schemas. See alsoBI,86);" target="_blank" rel="nofollow">PM.
Safe To Remove:
Yes �C run$ORACLE_HOME/demo/schema/drop_sch.sql
Recreation Script:
$ORACLE_HOME/demo/schema/human_resources/hr_main.sql
IX
Purpose:
Safe To Remove:
Yes �C run$ORACLE_HOME/demo/schema/drop_sch.sql
Recreation Script:
$ORACLE_HOME/demo/schema/info_exchange/ix_main.sql
MDDATA
Purpose:
The schema used by Oracle Spatial for storing Geocoder and router data. See alsoSPATIAL_CSW_ADMIN_USR,SPATIAL_WFS_ADMIN_USRandMDSYS.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/md/admin/catmd.sql
MDSYS
Purpose:
The Oracle Spatial and Oracle Multimedia Locator administrator account. See alsoMDDATAandSPATIAL_WFS_ADMIN_USR.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ord/admin/ordinst.sql
MGMT_VIEW
Purpose:
An account used by Oracle Enterprise Manager Database Control. Password is randomly generated at installation or database creation time. Users do not need to know this password.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/sysman/admin/emdrep/bin/RepManager
OE
Purpose:
The account that owns the Order Entry schema included in the Oracle Sample Schemas. See alsoPM.
Safe To Remove:
Yes �C run$ORACLE_HOME/demo/schema/drop_sch.sql
Recreation Script:
$ORACLE_HOME/ demo/schema/order_entry/oe_main.sql
OLAPSYS
Purpose:
The account that owns the OLAP Catalog (CWMLite). This account has been deprecated,but is retained for backward compatibility.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/olap/admin/amdsys.sql
ORACLE_OCM
Purpose:
This account contains the instrumentation for configuration collection used by the Oracle Configuration Manager.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/catocm.sql
ORDDATA
Purpose:
This account contains the Oracle Multimedia DICOM data model.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ord/admin/ordisysc.sql
ORDPLUGINS
Purpose:
The Oracle Multimedia user. Plug-ins supplied by Oracle and third-party,format plug-ins are installed in this schema. Oracle Multimedia enables Oracle Database to store,manage,and retrieve images,audio,video,DICOM format medical images and other objects,or other heterogeneous media data integrated with other enterprise information. See alsoORDSYSandSI_INFORMTN_SCHEMA.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ord/admin/ordinst.sql
ORDSYS
Purpose:
The Oracle Multimedia administrator account. See alsoORDPLUGINSand
OUTLN
Purpose:
The account that supports plan stability. Plan stability prevents certain database environment changes from affecting the performance characteristics of applications by preserving execution plans in stored outlines. OUTLN acts as a role to centrally manage metadata associated with stored outlines.
Safe To Remove:
No
Recreation Script:
$ORACLE_HOME/rdbms/admin/sql.bsq. Recover from backup or recreate the database.
OWBSYS
Purpose:
The account for administrating the Oracle Warehouse Builder repository. Access this account during the installation process to define the base language of the repository and to define Warehouse Builder workspaces and users. A data warehouse is a relational or multidimensional database that is designed for query and analysis. See alsoOWBSYS_AUDIT.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/owb/UnifiedRepos/cat_owb.sql
OWBSYS_AUDIT
Purpose:
This account is used by the Warehouse Builder Control Center Agent to access the heterogeneous execution audit tables in theOWBSYSschema.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/owb/UnifiedRepos/cat_owb.sql
PM
Purpose:
Safe To Remove:
Yes �C run$ORACLE_HOME/demo/schema/drop_sch.sql
Recreation Script:
$ORACLE_HOME/demo/schema/product_media/pm_main.sql
SCOTT
Purpose:
An account used by Oracle sample programs and examples.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/utlsampl.sql
SH
Purpose:
The account that owns the Sales History schema included in the Oracle Sample Schemas and is only available forEnterprise Editioninstallations. See alsoPM.
Safe To Remove:
Yes �C run$ORACLE_HOME/demo/schema/drop_sch.sql
Recreation Script:
$ORACLE_HOME/demo/schema/sales_history/sh_main.sql
SI_INFORMTN_SCHEMA
Purpose:
The account that stores the information views for the SQL/MM Still Image Standard. See alsoORDPLUGINSandORDSYS.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ord/admin/ordinst.sql
SPATIAL_CSW_ADMIN_USR
Purpose:
The Catalog Services for the Web (CSW) account. It is used by the Oracle Spatial CSW cache manager to load all record type metadata,and record instances from the database into the main memory for the record types that are cached. See alsoSPATIAL_WFS_ADMIN_USR,86);" target="_blank" rel="nofollow">MDDATAandMDSYS.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/md/admin/sdocswpv.sql
SPATIAL_WFS_ADMIN_USR
Purpose:
The Web Feature Service (WFS) account. It is used by the Oracle Spatial WFS cache manager to load all feature type metadata,and feature instances from the database into main memory for the feature types that are cached. See alsoMDSYS.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/md/admin/sdowfspv.sql
SYS
Purpose:
An account used to perform database administration tasks. Password is created at installation or database creation time.
Safe To Remove:
No
Recreation Script:
$ORACLE_HOME/rdbms/admin/sql.bsq. Recover from backup or recreate the database.
SYSMAN
Purpose:
Safe To Remove:
Yes
Recreation Script:
Created as part of thedbconsoleorEnterprise Managerbuild.
SYSTEM
Purpose:
A default generic database administrator account for Oracle databases. For production systems,Oracle recommends creating individual database administrator accounts and not using the genericSYSTEMaccount for database administration operations. Password is created at installation or database creation time.
Safe To Remove:
No
Recreation Script:
$ORACLE_HOME/rdbms/admin/sql.bsq. Recover from backup or recreate the database.
WMSYS
Purpose:
The account used to store the metadata information for Oracle Workspace Manager.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/owmctab.plb
XDB
Purpose:
The account used for storing Oracle XML DB data and metadata. See alsoANONYMOUS.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/catqm.sql
XS$NULL
Purpose:
An internal account that represents the absence of a user in a session. Because XS$NULL is not a user,this account can only be accessed by the Oracle Database instance. XS$NULL has no privileges and no one can authenticate as XS$NULL,nor can authentication credentials ever be assigned to XS$NULL.
Safe To Remove:
No
Recreation Script:
$ORACLE_HOME/rdbms/admin/sql.bsq. Recover from backup or recreate the database.
OTHER ADMINISTRATIVE SCHEMA
The schema listed below arenotinstalled by default,but can be built using the creation script(s) cited and any necessary additional steps as prescribed by the appropriate Oracle manual.
LBACSYS
Purpose:
The account used to administer Oracle Label Security (OLS). It is created only when the Label Security custom option is installed.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/rdbms/admin/catlbacs.sql
WK_TEST
Purpose:
The instance administrator for the default instance,WK_INST. After unlocking this account and assigning this user a password,then the cached schema password must also be updated using the administration tool Edit Instance Page. Ultra Search provides uniform search-and-location capabilities over multiple repositories,such as Oracle databases,other ODBC compliant databases,IMAP mail servers,HTML documents managed by a Web server,files on disk,and more. See alsoWKSYS
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ultrasearch/admin/wk0csys.sql
WKSYS
Purpose:
An Ultra Search database super-user. WKSYS can grant super-user privileges to other users,such as WK_TEST. All Oracle Ultra Search database objects are installed in the WKSYS schema. See alsoWK_TEST
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ultrasearch/admin/wk0csys.sql
WKPROXY
Purpose:
An administrative account of Application Server Ultra Search.
Safe To Remove:
Yes
Recreation Script:
$ORACLE_HOME/ultrasearch/admin/wk0csys.sql
ADDITIONAL INFORMATION
Further information can be found in Metalink article160861.1.
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