>>>>> "Tom" == Tom Lane <tgl@sss.pgh.pa.us> writes:
Tom> Tell you the truth, my advice is to reconsider the way you're
Tom> using NULLs. C.J. Date thinks NULLs are evil and best
Tom> avoided ... your case may be an example of what he's driving
Tom> at.
I have reconsidered...the NULLs have to stay, but the index is no
longer unique, it is only on the non-null columns, and is only being
used for select purposes. Instead, I am enforcing the constraint via
a "before insert" trigger. Except for loading the table, this table
will have virtually no inserts, so the trigger seems a reasonable way
to go.
roland
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Roland B. Roberts, PhD RL Enterprises
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