Developers,
I'm finding an issue I thought was fixed with RC2, which is affecting my
ability to use arrays in RC5:
Summary: Fast repeated calls to INT[] = INT[] operator causes error
Severity: Query Failure
Version: 8.0.0rc5, previous builds of 8.0.0
Platform: Gentoo Linux
Description:
The following comparison works fine normally:
template1=# select '{}'::INT[] = '{}'::INT[];
?column?
----------
t
(1 row)
However, we're found that if you run thousands of empty array comparisons in a
few seconds/minutes, eventually the empty array comparison breaks, and you
get:
ERROR: cache lookup failed for function 0
Thereafter, *any* attempt to compare arrays gets:
dm=# select '{}'::INT[] = '{}'::INT[];
ERROR: cache lookup failed for function 0
I'm working on a repeatable test case and seeing whether vacuum and/or restart
affects this, but since we're 24 hours from wrap, I thought I should raise
this issue ASAP.
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco