mirror of
https://git.postgresql.org/git/postgresql.git
synced 2025-01-12 18:34:36 +08:00
2ff6555313
The xlogreader refactoring broke the logic to decide which timeline to start streaming from. XLogPageRead() uses the timeline history to check which timeline the requested WAL position falls into. However, after the refactoring, XLogPageRead() is always first called with the first page in the segment, to verify the segment header, and only then with the actual WAL position we're interested in. That first read of the segment's header made XLogPageRead() to always start streaming from the old timeline containing the segment header, not the timeline containing the actual record, if there was a timeline switch within the segment. I thought I fixed this yesterday, but that fix was too narrow and only fixed this for the corner-case that the timeline switch happened in the first page of the segment. To fix this more robustly, pass explicitly the position of the record we're actually interested in to XLogPageRead, and use that to decide which timeline to read from, rather than deduce it from the page and offset. Per report from Fujii Masao. |
||
---|---|---|
config | ||
contrib | ||
doc | ||
src | ||
.gitignore | ||
aclocal.m4 | ||
configure | ||
configure.in | ||
COPYRIGHT | ||
GNUmakefile.in | ||
Makefile | ||
README | ||
README.git |
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.