Add missing documentation for argument of amcostestimate()

Alexander Korotkov <akorotkov@postgresql.org>

Commit: dc444801ba692f773836308a44b2c0ed88af87e5
Author: Alexander Korotkov <akorotkov@postgresql.org>
Date: 2018-08-10T11:20:11Z
Releases: 11.0
Add missing documentation for argument of amcostestimate()

5262f7a4fc44 have introduced parallel index scan.  In order to estimate the
number of parallel workers, it adds extra argument to amcostestimate() index
access method API function.  However, this extra argument was missed in the
documentation.  This commit fixes that.

Discussion: https://postgr.es/m/4128fdb4-8b63-2e05-38f6-3125f8c27263%40lab.ntt.co.jp
Author: Tatsuro Yamada, Alexander Korotkov
Backpatch-through: 10

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doc/src/sgml/indexam.sgml modified +19 −3

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