From: | tgl(at)postgresql(dot)org (Tom Lane) |
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To: | pgsql-committers(at)postgresql(dot)org |
Subject: | pgsql: Fix planner to make a reasonable assumption about the amount of |
Date: | 2010-08-14 15:47:30 |
Message-ID: | 20100814154730.A811C7541D7@cvs.postgresql.org |
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Lists: | pgsql-committers |
Log Message:
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Fix planner to make a reasonable assumption about the amount of memory space
used by array_agg(), string_agg(), and similar aggregate functions that use
"internal" as their transition datatype. The previous coding thought this
took *no* extra space, since "internal" is pass-by-value; but actually these
aggregates typically consume a great deal of space. Per bug #5608 from
Itagaki Takahiro, and fix suggestion from Hitoshi Harada.
Back-patch to 8.4, where array_agg was introduced.
Tags:
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REL8_4_STABLE
Modified Files:
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pgsql/src/backend/optimizer/util:
clauses.c (r1.277.2.2 -> r1.277.2.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/clauses.c?r1=1.277.2.2&r2=1.277.2.3)
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