| From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | vadim(at)sable(dot)krasnoyarsk(dot)su (Vadim B(dot) Mikheev) |
| Cc: | hackers(at)postgreSQL(dot)org (PostgreSQL-development) |
| Subject: | OR clause and joins |
| Date: | 1998-08-07 05:10:18 |
| Message-ID: | 199808070510.BAA03771@candle.pha.pa.us |
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| Thread: | |
| Lists: | pgsql-hackers |
I believe that clauses.c:join_clause_p properly only allows merge and
hash joins on non-OR clauses. It is called from
initialize_join_clause_info().
I can't get anything but a sequential scan on an OR clause, so I think
we are safe with the multi-index OR handling.
I will keep checking, though.
--
Bruce Momjian | 830 Blythe Avenue
maillist(at)candle(dot)pha(dot)pa(dot)us | Drexel Hill, Pennsylvania 19026
+ If your life is a hard drive, | (610) 353-9879(w)
+ Christ can be your backup. | (610) 853-3000(h)
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