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|Check what happens if table with column sizes that exceeds page size for a row. If there is limit, then move virtual columns to tables instead
|[http://www.postgresql.org/docs/8.4/interactive/storage-toast.html EXTENDED allows both compression and out-of-line storage. This is the default for most TOAST-able data types. Compression will be attempted first, then out-of-line storage if the row is still too big.]
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|Are postgresql functions transaction safe?