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pgsql: Add an 'enable_material' GUC.

From: rhaas(at)postgresql(dot)org (Robert Haas)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Add an 'enable_material' GUC.
Date: 2010-04-19 00:55:26
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Lists: pgsql-committers
Log Message:
Add an 'enable_material' GUC.

The logic for determining whether to materialize has been significantly
overhauled for 9.0.  In case there should be any doubt about whether
materialization is a win in any particular case, this should provide a
convenient way of seeing what happens without it; but even with enable_material
turned off, we still materialize in cases where it is required for

Thanks to Tom Lane for the review.

Modified Files:
        config.sgml (r1.267 -> r1.268)
        costsize.c (r1.216 -> r1.217)
        joinpath.c (r1.132 -> r1.133)
        subselect.c (r1.161 -> r1.162)
        guc.c (r1.547 -> r1.548)
        postgresql.conf.sample (r1.282 -> r1.283)
        cost.h (r1.100 -> r1.101)
        rangefuncs.out (r1.24 -> r1.25)

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Subject: pgbouncer - pgbouncer: Increase room for DateStyle storage.
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Subject: pgsql: Provide better guidance for adjusting shared_buffers.

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