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We haven't had a fixed limit on rule recursion depth since 7.3 ...

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but the documentation still said so.
This commit is contained in:
Tom Lane 2005-01-29 23:45:36 +00:00
parent b7d236d663
commit 5703a69003
1 changed files with 6 additions and 7 deletions
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13
doc/src/sgml/rules.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/rules.sgml,v 1.40 2005/01/23 00:30:18 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/rules.sgml,v 1.41 2005/01/29 23:45:36 tgl Exp $ -->
<chapter id="rules">
<title>The Rule System</title>
@ -1000,12 +1000,11 @@ CREATE RULE <replaceable>rule_name</> AS ON <replaceable>event</>
The query trees generated from rule actions are thrown into the
rewrite system again, and maybe more rules get applied resulting
in more or less query trees.
So the query trees in the rule actions must have either a different command type
or a different result relation, otherwise, this recursive process will end up in a loop.
There is a fixed recursion limit of currently 100 iterations.
If after 100 iterations there are still update rules to apply, the
rule system assumes a loop over multiple rule definitions and reports
an error.
So a rule's actions must have either a different
command type or a different result relation than the rule itself is
on, otherwise this recursive process will end up in an infinite loop.
(Recursive expansion of a rule will be detected and reported as an
error.)
</para>
<para>