Change the rules for inherited CHECK constraints to be essentially the same

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as those for inherited columns; that is, it's no longer allowed for a child
table to not have a check constraint matching one that exists on a parent.
This satisfies the principle of least surprise (rows selected from the parent
will always appear to meet its check constraints) and eliminates some
longstanding bogosity in pg_dump, which formerly had to guess about whether
check constraints were really inherited or not.

The implementation involves adding conislocal and coninhcount columns to
pg_constraint (paralleling attislocal and attinhcount in pg_attribute)
and refactoring various ALTER TABLE actions to be more like those for
columns.

Alex Hunsaker, Nikhil Sontakke, Tom Lane

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This commit is contained in:

Tom Lane

2008-05-09 23:32:05 +00:00

parent f8df836ae3

commit cd902b331d

25 changed files with 1391 additions and 575 deletions

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src/backend/commands/tablecmds.c

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