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Update reference to sampling algorithm in analyze.c

Tomas Vondra <tomas.vondra@postgresql.org>

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Commit: 0161e522cbb536d8978ca8e5b5341b16805cc6b4
Author: Tomas Vondra <tomas.vondra@postgresql.org>
Date: 2019-06-27T16:15:05Z
Releases: 10.10 
Update reference to sampling algorithm in analyze.c

Commit 83e176ec1 moved row sampling functions from analyze.c to
utils/misc/sampling.c, but failed to update comment referring to
the sampling algorithm from Jeff Vitter's paper. Correct the
comment by pointing to utils/misc/sampling.c.

Author: Etsuro Fujita
Discussion: https://postgr.es/m/CAPmGK154gp%2BQd%3DcorQOv%2BPmbyVyZBjp_%2Bhb766UJeD1e_ie6XQ%40mail.gmail.com

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PathChange+/−
src/backend/commands/analyze.c modified +7 −7

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