Re: [HACKERS] Proposal: Local indexes for partitioned table

From: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
To: Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>
Cc: Jesper Pedersen <jesper(dot)pedersen(at)redhat(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Maksim Milyutin <milyutinma(at)gmail(dot)com>
Subject: Re: [HACKERS] Proposal: Local indexes for partitioned table
Date: 2017-12-29 20:38:18
Message-ID: 20171229203818.pqxf2cyl4g2wre6h@alvherre.pgsql
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I just realized there's a further problem in the area: when a partition
is detached from its parent, its indexes are not made independent of the
indexes on parent. So they can't be dropped on their own (booh!); and
dropping the index on the former parent partitioned table drops the
index on the former partition also (hiss!). I think the fix for this is
to delete all dependencies, and re-register normal ones. Should be
straightforward, but I'm not doing it this year.

Álvaro Herrera
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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