pgsql: Fix ts_stat's failure on empty tsvector.

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix ts_stat's failure on empty tsvector.
Date: 2009-10-13 14:33:21
Message-ID: 20091013143321.748BF753FB7@cvs.postgresql.org
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Log Message:
-----------
Fix ts_stat's failure on empty tsvector.
Also insert a couple of Asserts that check for stack overflow.
Bogus coding appears to be new in 8.4 --- older releases had a much
simpler algorithm here. Per bug #5111.

Tags:
----
REL8_4_STABLE

Modified Files:
--------------
pgsql/src/backend/utils/adt:
tsvector_op.c (r1.23 -> r1.23.2.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsvector_op.c?r1=1.23&r2=1.23.2.1)

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