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author	Thomas Munro <tmunro@postgresql.org>
	Wed, 16 Oct 2019 03:51:40 +0000 (16:51 +1300)
committer	Thomas Munro <tmunro@postgresql.org>
	Wed, 16 Oct 2019 04:28:24 +0000 (17:28 +1300)
commit	d5ac14f9ccdda036358c9059d4a29836ebc0c440
tree	3d7e1242ce542914a89467af88099bdccf116fbe	tree \| snapshot
parent	4351142e5843dc9fcb080a51aa082d63be59a5ab	commit \| diff

Use libc version as a collation version on glibc systems.

Using glibc's version string to detect potential collation definition
changes is not 100% reliable, but it's better than nothing. Currently
this affects only collations explicitly provided by "libc". More work
will be needed to handle the default collation.

Author: Thomas Munro, based on a suggestion from Christoph Berg
Reviewed-by: Peter Eisentraut
Discussion: https://postgr.es/m/4b76c6d4-ae5e-0dc6-7d0d-b5c796a07e34%402ndquadrant.com

doc/src/sgml/ref/alter_collation.sgml		diff \| blob \| blame \| history
src/backend/utils/adt/pg_locale.c		diff \| blob \| blame \| history
src/bin/pg_dump/t/002_pg_dump.pl		diff \| blob \| blame \| history

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