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Add pg_visibility contrib module.

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This lets you examine the visibility map as well as page-level
visibility information.  I initially wrote it as a debugging aid,
but was encouraged to polish it for commit.

Patch by me, reviewed by Masahiko Sawada.

Discussion: 56D77803.6080503@BlueTreble.com
This commit is contained in:
Robert Haas
2016-03-08 08:38:50 -05:00
parent 6f56b41ac0
commit ba0a198fb1
9 changed files with 544 additions and 0 deletions
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contrib/pg_visibility/pg_visibility.control Normal file
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# pg_visibility extension
comment = 'examine the visibility map (VM) and page-level visibility info'
default_version = '1.0'
module_pathname = '$libdir/pg_visibility'
relocatable = true