On 3/3/15 8:04 PM, Kyotaro HORIGUCHI wrote:
>Note: The OID alias types don't sctrictly comply the transaction
>   isolation rules so do not use them where exact transaction
>   isolation on the values of these types has a
>   significance. Likewise, since they look as simple constants to
>   planner so you might get slower plans than the queries joining
>   the system tables correnspond to the OID types.

Might I suggest:

Note: The OID alias types do not completely follow transaction isolation rules. The planner also treats them as simple constants, which may result in sub-optimal planning.
--
Jim Nasby, Data Architect, Blue Treble Consulting
Data in Trouble? Get it in Treble! http://BlueTreble.com


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