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Support deferrable uniqueness constraints.

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The current implementation fires an AFTER ROW trigger for each tuple that
looks like it might be non-unique according to the index contents at the
time of insertion.  This works well as long as there aren't many conflicts,
but won't scale to massive unique-key reassignments.  Improving that case
is a TODO item.

Dean Rasheed
This commit is contained in:
Tom Lane
2009-07-29 20:56:21 +00:00
parent 8504905793
commit 25d9bf2e3e
51 changed files with 1241 additions and 245 deletions
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3
src/test/regress/sql/sanity_check.sql
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@@ -22,4 +22,5 @@ FROM pg_class c LEFT JOIN pg_namespace n ON n.oid = relnamespace
WHERE relhasoids
AND ((nspname ~ '^pg_') IS NOT FALSE)
AND NOT EXISTS (SELECT 1 FROM pg_index i WHERE indrelid = c.oid
AND indkey[0] = -2 AND indnatts = 1 AND indisunique);
AND indkey[0] = -2 AND indnatts = 1
AND indisunique AND indimmediate);