Tom Lane wrote:

> What we need is a unique index on pg_constraint.
> The problem with that is that pg_constraint contains both table-related
> and type (domain) related constraints; but it strikes me that we could
> probably create a unique index on (conrelid, contypid, conname).

Weren't you proposing elsewhere to split pg_constraint in two catalogs,
one for table constraint and another for domain constraints?  That seems
a cleaner solution to me.

Álvaro Herrera      
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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