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Add exclusion constraints, which generalize the concept of uniqueness to

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support any indexable commutative operator, not just equality.  Two rows
violate the exclusion constraint if "row1.col OP row2.col" is TRUE for
each of the columns in the constraint.

Jeff Davis, reviewed by Robert Haas
This commit is contained in:
Tom Lane
2009-12-07 05:22:23 +00:00
parent 8de7472b45
commit 0cb65564e5
43 changed files with 1613 additions and 236 deletions
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10
src/backend/commands/vacuum.c
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@@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.396 2009/11/16 21:32:06 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.397 2009/12/07 05:22:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -763,7 +763,8 @@ vac_update_relstats(Relation relation,
/*
* If we have discovered that there are no indexes, then there's no
* primary key either. This could be done more thoroughly...
* primary key either, nor any exclusion constraints. This could be done
* more thoroughly...
*/
if (!hasindex)
{
@@ -772,6 +773,11 @@ vac_update_relstats(Relation relation,
pgcform->relhaspkey = false;
dirty = true;
}
if (pgcform->relhasexclusion && pgcform->relkind != RELKIND_INDEX)
{
pgcform->relhasexclusion = false;
dirty = true;
}
}
/* We also clear relhasrules and relhastriggers if needed */