From: Alvaro Herrera <alvherre@commandprompt.com>
To: Samuel Gendler <sgendler@ideasculptor.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Kris Jurka <books@ejurka.com>
Cc: pgsql-performance <pgsql-performance@postgresql.org>
Subject: Re: No hash join across partitioned tables?
Date: Sat, 16 Oct 2010 12:29:39 -0300
Message-ID: <1287242940-sup-5258@alvh.no-ip.org> (raw)
In-Reply-To: <AANLkTim1+h8jgOV6iEoN8OxF19MTb+wHFDMP8_tKdONp@mail.gmail.com>
References: <201002252346.o1PNkXG07892@momjian.us>
<9477.1267142614@sss.pgh.pa.us>
<603c8f071003020816j77b3ec63wbad0415df003c0f1@mail.gmail.com>
<17546.1267546998@sss.pgh.pa.us>
<AANLkTinx8lLTEKWcyEQ1rxVz6WMJVKNezfXW5TKnNAU6@mail.gmail.com>
<1287205016-sup-542@alvh.no-ip.org>
<29559.1287206562@sss.pgh.pa.us>
<AANLkTim1+h8jgOV6iEoN8OxF19MTb+wHFDMP8_tKdONp@mail.gmail.com>
Excerpts from Samuel Gendler's message of sáb oct 16 02:35:46 -0300 2010:
> An issue with automatically analyzing the entire hierarchy is 'abstract'
> table definitions. I've got a set of tables for storing the same data at
> different granularities of aggregation. Within each granularity, I've got
> partitions, but because the set of columns is identical for each
> granularity, I've got an abstract table definition that is inherited by
> everything. I don't need or want statistics kept on that table because I
> never query across the abstract table, only the parent table of each
> aggregation granularity
Hmm, I think you'd be better served by using LIKE instead of regular
inheritance.
--
Álvaro Herrera <alvherre@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
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Cc: alvherre@commandprompt.com, sgendler@ideasculptor.com, tgl@sss.pgh.pa.us, robertmhaas@gmail.com, bruce@momjian.us, books@ejurka.com
Subject: Re: No hash join across partitioned tables?
In-Reply-To: <1287242940-sup-5258@alvh.no-ip.org>
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