sql query cursor problem

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Peter RISKO
Your email address : rpetike@freemail.hu

System Configuration
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Architecture (example: Intel Pentium) : Intel Pentium III

Operating System (example: Linux 2.0.26 ELF) : Linux 2.4.3

PostgreSQL version (example: PostgreSQL-7.0): PostgreSQL-7.1.1

Compiler used (example: gcc 2.8.0) : gcc 2.95.2

Please enter a FULL description of your problem:
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Dear list members,
We are developing an application that uses Postgresql as its dbms.
It seems we've found a bug in PostgreSQL handling of cursored queries.
I assume that it's legal to do 'fetch backward all in xxx' and then
'fetch 1 in xxx' afterwards. If it is not legal in Postgresql, the rest
of this mail is irrelevant. (I have been using Postgresql for quite a
long time now, and I experienced that you cannot 'fall off' of neither
ends of a query result by moving the cursor.)

Please describe a way to repeat the problem. Please try to provide a
concise reproducible example, if at all possible:
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So the bug appears when I execute the following steps:

1.
in psql shell: => create database test;
=> create user tester with password 'tester';
2.
in the os's shell: $ psql -d test -U tester -f ss3.sql
$ psql -d test -U tester
3.
in psql shell: => \i test5a.sql
=> fetch 1 in lionhart;
=> fetch -1 in lionhart;
=> fetch 1 in lionhart;
??? last fetch should return a row, but it doesn't seem like...

Attached files:
ss3.sql : The dumped content of my database
test5a.sql : The query we would use

If you know how this problem might be fixed, list the solution below:
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