diff options
| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2011-06-01 18:43:50 -0400 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2011-06-30 11:24:31 -0400 |
| commit | 897795240cfaaed724af2f53ed2c50c9862f951f (patch) | |
| tree | a646222fe29936f565e715a1cce3a65016587057 /src/include/nodes/parsenodes.h | |
| parent | b36927fbe922d1aac5d6e42c04eecf65bf37f5f3 (diff) | |
Enable CHECK constraints to be declared NOT VALID
This means that they can initially be added to a large existing table
without checking its initial contents, but new tuples must comply to
them; a separate pass invoked by ALTER TABLE / VALIDATE can verify
existing data and ensure it complies with the constraint, at which point
it is marked validated and becomes a normal part of the table ecosystem.
An non-validated CHECK constraint is ignored in the planner for
constraint_exclusion purposes; when validated, cached plans are
recomputed so that partitioning starts working right away.
This patch also enables domains to have unvalidated CHECK constraints
attached to them as well by way of ALTER DOMAIN / ADD CONSTRAINT / NOT
VALID, which can later be validated with ALTER DOMAIN / VALIDATE
CONSTRAINT.
Thanks to Thom Brown, Dean Rasheed and Jaime Casanova for the various
reviews, and Robert Hass for documentation wording improvement
suggestions.
This patch was sponsored by Enova Financial.
Diffstat (limited to 'src/include/nodes/parsenodes.h')
| -rw-r--r-- | src/include/nodes/parsenodes.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h index c65e3cd6e8c..00c1269bd14 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -1190,6 +1190,7 @@ typedef enum AlterTableType AT_AddConstraint, /* add constraint */ AT_AddConstraintRecurse, /* internal to commands/tablecmds.c */ AT_ValidateConstraint, /* validate constraint */ + AT_ValidateConstraintRecurse, /* internal to commands/tablecmds.c */ AT_ProcessedConstraint, /* pre-processed add constraint (local in * parser/parse_utilcmd.c) */ AT_AddIndexConstraint, /* add constraint using existing index */ @@ -1543,6 +1544,8 @@ typedef struct Constraint char fk_matchtype; /* FULL, PARTIAL, UNSPECIFIED */ char fk_upd_action; /* ON UPDATE action */ char fk_del_action; /* ON DELETE action */ + + /* Fields used for constraints that allow a NOT VALID specification */ bool skip_validation; /* skip validation of existing rows? */ bool initially_valid; /* mark the new constraint as valid? */ } Constraint; |