| From: | Teodor Sigaev <teodor(at)sigaev(dot)ru> |
|---|---|
| To: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, Uriy Zhuravlev <u(dot)zhuravlev(at)postgrespro(dot)ru> |
| Cc: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Selectivity estimation for intarray with @@ |
| Date: | 2015-07-21 14:14:39 |
| Message-ID: | 55AE53CF.1050904@sigaev.ru |
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| Thread: | |
| Lists: | pgsql-hackers |
Some notices about code:
1 Near function transformOperator() there is wrong operator name "@<"
2 int_query (and intquery) should be replaced to query_int to be consistent with
actual type name. At least where it's used as separate lexeme.
3 For historical reasons @@ doesn't commutate with itself, it has a commutator
~~. Patch assumes that @@ is self-commutator, but ~~ will use 'contsel' as a
restrict estimation. Suppose, we need to declare ~~ as deprecated and introduce
commutating @@ operator.
--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/
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