regression=# UPDATE foo SET f2=now() WHERE f1=1; ERROR: deadlock detected DETAIL: Process 18122 waits for AccessExclusiveLock on relation 154635 of database 17139; blocked by process 18133. Process 18133 waits for ShareLock on transaction 6330; blocked by process 18122.
The trouble here is that GIST indexes are not concurrency-safe. This is on the TODO list but I fear it's not a small task ...
Wow, that's bad. I always thought the TODO item was talking about poor concurrent performance - not actual concurrency errors!
Chris
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
