Glossary
application
Parent topic: Glossary
application common object
Parent topic: Glossary
application common user
Parent topic: Glossary
application container
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application patch
ALTER PLUGGABLE DATABASE APPLICATION
statement.
Parent topic: Glossary
application root
CREATE PLUGGABLE DATABASE
statement.
Parent topic: Glossary
application seed
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application upgrade
ALTER PLUGGABLE DATABASE APPLICATION
statement.
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CDB
An Oracle Database installation that contains at least one PDB. A PDB appears to an Oracle Net client as a traditional Oracle database. Every Oracle database is either a CDB or a non-CDB.
Parent topic: Glossary
CDB administrator
A database administrator who manages a CDB. A PDB administrator manages individual PDBs within the CDB.
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CDB fleet
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CDB restore point
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CDB root
In a multitenant container database (CDB), a collection of schemas, schema objects, and nonschema objects to which all PDBs belong. Every CDB has exactly one root container, which stores the system metadata required to manage PDBs. All PDBs belong to the CDB root.
Parent topic: Glossary
clean restore point
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common object
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common user
In a multitenant container database (CDB), a database user that exists with the same identity in multiple containers. A common user created in the CDB root has the same identity in every existing and future PDB. A common user created in an application container has the same identity in every existing and future application PDB in this application container.
Parent topic: Glossary
container
In a multitenant container database (CDB), either the root or a PDB.
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container data object
In a CDB, a table or view containing data pertaining to multiple containers and possibly the CDB as a whole, along with mechanisms to restrict data visible to specific common users through such objects to one or more containers. Examples of container data objects are Oracle-supplied views whose names begin with V$
and CDB_
.
Parent topic: Glossary
cross-container operation
In a CDB, a DDL statement that affects the CDB itself, multiple containers, multiple common users or roles, or a container other than the one to which the user is connected. Only a common user connected to the root can perform cross-container operations.
Parent topic: Glossary
data link
In a PDB, an internal mechanism that points to data (not metadata) in the root. For example, AWR data resides in the root. Each PDB uses an object link to point to the AWR data in the root, thereby making views such as DBA_HIST_ACTIVE_SESS_HISTORY
and DBA_HIST_BASELINE
accessible in each separate container.
Parent topic: Glossary
database consolidation
The general process of moving data from one or more non-CDBs into a multitenant container database (CDB).
Parent topic: Glossary
data-linked common object
A common object that exists either in the CDB root or an application root. The data, rather than the metadata, is shared by any PDB that contains a data link that points to the common object.
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extended data-linked common object
A hybrid of a data-linked common object and a metadata-linked common object. For an extended data-linked object, each application PDB can create its own PDB-specific data while sharing the common data in the application root.
Parent topic: Glossary
lead CDB
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local user
In a multitenant container database (CDB), any user that is not a common user.
Parent topic: Glossary
metadata link
In a PDB, an internal mechanism that points to a dictionary object definition stored in the root. For example, the OBJ$
table in each PDB uses a metadata link to point to the definition of OBJ$
stored in the root.
Parent topic: Glossary
metadata-linked common object
A common object that exists either in the CDB root or an application root. The metadata, rather than the data, is shared by any PDB that contains a metadata link that points to the common object.
Parent topic: Glossary
multitenant architecture
The architecture that enables an Oracle database to function as a multitenant container database (CDB), which means that it can contain multiple PDBs. A PDB is a portable collection of schemas, schema objects, and nonschema objects that appears to an Oracle Net client as a traditional Oracle database (non-CDB).
Parent topic: Glossary
non-CDB
An Oracle database that is not a multitenant container database (CDB). Before Oracle Database 12c, all databases were non-CDBs. Starting in Oracle Database 12c, every database must be either a CDB or a non-CDB.
Parent topic: Glossary
Oracle Multitenant
A database option that enables you to create multiple PDBs in a CDB.
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PDB
In a multitenant container database (CDB), a portable collection of schemas, schema objects, and nonschema objects that appears to an Oracle Net client as a traditional Oracle database (non-CDB).
Parent topic: Glossary
PDB administrator
A database administrator who manages one or more PDBs. A CDB administrator manages the whole CDB.
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PDB archive file
A compressed file that contains both PDB data files and an XML metadata file. You can create a PDB by specifying the archive file, and thereby avoid copying the XML file and the data files separately.
Parent topic: Glossary
PDB lockdown profile
A security mechanism to restrict operations that are available to local users connected to a specified PDB. A typical use is to limit the effect of a grant privilege. For example, you limit the grant of ALTER SYSTEM
to only those options whose names begin with PLSQL
.
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PDB performance profile
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PDB restore point
Within a CDB, a restore point that usable only for a specific PDB. In contrast, a CDB restore point is usable by all PDBs.
Parent topic: Glossary
PDB snapshot
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PDB synchronization
The user-initiated update of the application in an application PDB to the latest version and patch in the application root.
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PDB/non-CDB compatibility guarantee
In the multitenant architecture, the guarantee that a PDB behaves the same as a non-CDB as seen from a client connecting with Oracle Net.
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proxy PDB
A PDB that references a PDB in a remote CDB using a database link. The remote PDB is called a referenced PDB.
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referenced PDB
The PDB that is referenced by a proxy PDB. A local PDB is in the same CDB as its referenced PDB, whereas a remote PDB is in a different CDB.
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refreshable clone PDB
A read-only clone that can periodically synchronize with its source PDB. Depending on the value in the REFRESH MODE
clause, the synchronization occurs either automatically or manually.
Parent topic: Glossary
resource plan
A container for resource plan directives that specify how resources are allocated to resource consumer groups.
Parent topic: Glossary
resource plan directive
A set of limits and controls for CPU, physical I/O, or logical I/O consumption for sessions in a consumer group.
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seed PDB
In a multitenant container database (CDB), a default pluggable database (PDB) that the system uses as a template for user-created PDBs. A PDB seed is either the system-supplied PDB$SEED
or an application seed.
Parent topic: Glossary
shared undo mode
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snapshot copy PDB
SNAPSHOT COPY
clause. When creating a snapshot copy, Oracle Database does not make a complete copy of the source data files. Rather, Oracle Database creates a storage-level snapshot of the underlying file system, and then uses the snapshot to create PDB clones. Unlike a standard clone PDB, a snapshot copy PDB cannot be unplugged from the CDB root or plugged in to an application root.
Parent topic: Glossary
split mirror clone PDB
Parent topic: Glossary
system container
Parent topic: Glossary