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libpgcommon is a new static library to allow sharing code among the
various frontend programs and backend; this lets us eliminate duplicate
implementations of common routines. We avoid libpgport, because that's
intended as a place for porting issues; per discussion, it seems better
to keep them separate.
The first use case, and the only implemented by this patch, is pg_malloc
and friends, which many frontend programs were already using.
At the same time, we can use this to provide palloc emulation functions
for the frontend; this way, some palloc-using files in the backend can
also be used by the frontend cleanly. To do this, we change palloc() in
the backend to be a function instead of a macro on top of
MemoryContextAlloc(). This was previously believed to cause loss of
performance, but this implementation has been tweaked by Tom and Andres
so that on modern compilers it provides a slight improvement over the
previous one.
This lets us clean up some places that were already with
localized hacks.
Most of the pg_malloc/palloc changes in this patch were authored by
Andres Freund. Zoltán Böszörményi also independently provided a form of
that. libpgcommon infrastructure was authored by Álvaro.
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This patch implements parallel copying/linking of files by tablespace
using the --jobs option in pg_upgrade.
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Fully update git head, and update back branches in ./COPYRIGHT and
legal.sgml files.
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commit-fest.
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check cluster version numbers, and fix missing table alias.
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Instead, add a function pg_tablespace_location(oid) used to return
the same information, and do this by reading the symbolic link.
Doing it this way makes it possible to relocate a tablespace when the
database is down by simply changing the symbolic link.
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remove from local *.h files.
Per suggestion from Alvaro.
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pointers, which simplifies the code. This was not possible in 9.0 because
everything was in a single nested struct, but is possible now.
Per suggestion from Tom.
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documentation. (Many were left over from the old pg_migrator naming.)
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than packing everything into 'ctx' and passing that to every function.
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from Tom.
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Add documentation.
Supports migration from PG 8.3 and 8.4.
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