Alexey Slynko <slynko@tronet.ru> writes:
> Any suggestions?

Fix contrib/intarray to have some selectivity estimation procedures
for its operators?

Without any way to estimate the number of rows matching the @@
condition, the optimizer can hardly be expected to guess right...

regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match