Oracle 19c 新特性官方文檔介紹：
以下是本版本新增的主要特性。
PDB中的工作負載捕獲和重放
本地用戶可以捕獲、重放和報告PDB級別的工作負載。
參見“關於在CDB中使用可管理性特性”和Oracle數據庫測試指南。
PDBs的ADDM分析
可以使用ADDM通過在PDB中獲取的AWR快照來分析存儲在PDB中的AWR數據。還可以分析導入到PDB的AWR存儲中的非CDB、CDB根目錄或PDB的AWR數據。默認情況下，PDB的自動ADDM是禁用的。您可以通過啓用自動AWR快照來爲PDB啓用它。
參見“關於在CDB中使用可管理性特性”和Oracle數據庫性能調優指南。
基礎設施數據庫管理員的數據庫庫操作控制
可以使用Oracle Database Vault阻止普通用戶(例如，基礎架構dba)訪問PDBs中的本地數據。因此，普通用戶被阻止訪問本地數據。Oracle Database Vault使您能夠爲您的業務應用程序存儲敏感數據，並允許操作人員在不訪問敏感客戶數據的情況下管理數據庫基礎設施。
參見“使用數據庫庫操作控制來限制多租戶通用用戶訪問本地PDB數據”。
在同一個CDB中支持多個PDB碎片
CDB可以包含多個pdb作爲切分目錄數據庫。此外，CDB可以包含來自不同分片數據庫(SDBs)的分片PDBs，每個分片PDBs由它自己單獨的目錄數據庫管理。
參見使用Oracle分片。
自動化的PDB搬遷
在Oracle Grid基礎設施中，您可以使用Oracle Fleet補丁和供應來自動將PDB從一個CDB遷移到另一個CDB。自動重定位使您能夠更快地爲單個的PDBs打補丁，而不會將其他的PDBs暴露在補丁中的更改中。
請參閱Oracle集羣軟件管理和部署指南。
使用DBCA克隆遠程PDB
您可以在靜默模式下使用DBCA克隆遠程PDB。
請參閱“關於克隆遠程PDB”。
遠程PDB搬遷
可以使用數據庫配置助手(DBCA)將PDB從遠程CDB重新定位到本地CDB。
請參閱“使用DBCA重新定位PDB:示例”。
雲對象存儲支持數據泵導入
impdb的憑據參數指定憑據對象的名稱，該憑據對象包含訪問對象存儲桶所需的用戶名和密碼。還可以使用數據庫屬性DEFAULT_CREDENTIAL指定默認憑據。
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New Features
The following major features are new in this release.
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Workload capture and replay in a PDB
A local user can capture, replay, and report on a workload at the PDB level.
See "About Using Manageability Features in a CDB" and Oracle Database Testing Guide.
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ADDM analysis for PDBs
You can use ADDM to analyze AWR data stored inside the PDB through an AWR snapshot taken inside the PDB. You can also analyze AWR data of a non-CDB, CDB root, or PDB imported into the AWR storage of a PDB. Automatic ADDM of a PDB is disabled by default. You can enable it for a PDB by enabling automatic AWR snapshots.
See "About Using Manageability Features in a CDB" and Oracle Database Performance Tuning Guide.
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Database Vault Operations Control for infrastructure database administrators
You can use Oracle Database Vault to block common users (for example, infrastructure DBAs) from accessing local data in PDBs. Thus, common users are blocked from accessing local data. Oracle Database Vault enables you to store sensitive data for your business applications and allow operations to manage the database infrastructure without having to access sensitive customer data.
See "Using Database Vault Operations Control to Restrict Multitenant Common User Access to Local PDB Data".
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Support for multiple PDB shards in the same CDB
A CDB can contain multiple PDBs as shard catalog databases. Also, a CDB can contain shard PDBs from different sharded databases (SDBs), each managed by its own separate catalog database.
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Automated PDB relocation
In Oracle Grid Infrastructure, you can use Oracle Fleet Patching and Provisioning to automate relocation of a PDB from one CDB to another. Automated relocation enables you to patch individual PDBs more quickly without exposing other PDBs to the changes in the patch.
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Cloning a remote PDB using DBCA
You can clone a remote PDB using DBCA in silent mode.
See "About Cloning a Remote PDB".
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Remote PDB relocation
You can use Database Configuration Assistant (DBCA) to relocate a PDB from a remote CDB to a local CDB.
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Cloud object store support for Data Pump Import
The
credentialparameter ofimpdbspecifies the name of a credential object that contains the user name and password required to access an object store bucket. You can also specify a default credential using the database propertyDEFAULT_CREDENTIAL.