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This interface is designed to give an access to WAL for extensions which could implement new access method, for example. Previously it was impossible because restoring from custom WAL would need to access system catalog to find a redo custom function. This patch suggests generic way to describe changes on page with standart layout. Bump XLOG_PAGE_MAGIC because of new record type. Author: Alexander Korotkov with a help of Petr Jelinek, Markus Nullmeier and minor editorization by my Reviewers: Petr Jelinek, Alvaro Herrera, Teodor Sigaev, Jim Nasby, Michael Paquier |
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