What is shadow table in SAP BC-UPG - Upgrade - General?

SAP Term: shadow table

• Component: BC-UPG

• Component Name: Upgrade - General

• Description: Version of a table with the target release structure This table version is saved to the database with a name other than the original. Shadow tables are used to create the shadow Repository. In a Repository Switch Upgrade only the substitution tables are created as shadow tables. A System Switch Upgrade creates all SAP NetWeaver Application Server tables or SAP Web Application Server or SAP Basis tables in older releases required to operate the shadow instance. When the upgrade switches to the new system, the shadow tables are renamed with the original names if they: are substitution tables are part of the conversion are part of the shadow import into "old" tables.

Smart SAP Assistant

• Key Concepts: 
  A shadow table is a table in SAP that stores data from a source table. It is used to store data temporarily during an upgrade process. The shadow table is created with the same structure as the source table, but with different names. The data from the source table is then copied into the shadow table. 
  
  How to use it: 
  Shadow tables are used during an upgrade process to ensure that the data in the source table is not lost or corrupted during the upgrade. The data from the source table is copied into the shadow table, and then the upgrade process is performed on the shadow table. Once the upgrade process is complete, the data from the shadow table is copied back into the source table. 
  
  Tips & Tricks: 
  When using a shadow table, it is important to ensure that all of the data from the source table has been successfully copied into the shadow table before beginning the upgrade process. This will help to ensure that no data is lost or corrupted during the upgrade process. 
  
  Related Information: 
  Shadow tables are part of SAP's Upgrade Management Tool (UMT). UMT is a tool used to manage and automate SAP upgrades. It helps to ensure that upgrades are performed correctly and efficiently, and helps to reduce downtime associated with upgrades.