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Difference between check and a small table


Suppose I have one table, and one field (of this table) which accepts only a
certain range of values (they do not need to be continuous though).
What is the difference in the number of operations performed by postgres on
insert/update of data to this field if I use:
- check clauses
- a foreign key referencing another small table with those values?

Is there any significant performance improvement in using one method instead
of another?

Thanks in advance,

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Nov 12 '05 #1
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