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Add temporal PRIMARY KEY and UNIQUE constraints

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Add WITHOUT OVERLAPS clause to PRIMARY KEY and UNIQUE constraints.
These are backed by GiST indexes instead of B-tree indexes, since they
are essentially exclusion constraints with = for the scalar parts of
the key and && for the temporal part.

Author: Paul A. Jungwirth <pj@illuminatedcomputing.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CA+renyUApHgSZF9-nd-a0+OPGharLQLO=mDHcY4_qQ0+noCUVg@mail.gmail.com
This commit is contained in:
Peter Eisentraut
2024-01-24 15:43:41 +01:00
parent 74a7306310
commit 46a0cd4cef
34 changed files with 1135 additions and 52 deletions
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2
src/backend/nodes/outfuncs.c
View File

@@ -756,6 +756,7 @@ _outConstraint(StringInfo str, const Constraint *node)
case CONSTR_PRIMARY:
appendStringInfoString(str, "PRIMARY_KEY");
WRITE_NODE_FIELD(keys);
WRITE_BOOL_FIELD(without_overlaps);
WRITE_NODE_FIELD(including);
WRITE_NODE_FIELD(options);
WRITE_STRING_FIELD(indexname);
@@ -768,6 +769,7 @@ _outConstraint(StringInfo str, const Constraint *node)
appendStringInfoString(str, "UNIQUE");
WRITE_BOOL_FIELD(nulls_not_distinct);
WRITE_NODE_FIELD(keys);
WRITE_BOOL_FIELD(without_overlaps);
WRITE_NODE_FIELD(including);
WRITE_NODE_FIELD(options);
WRITE_STRING_FIELD(indexname);

2
src/backend/nodes/readfuncs.c
View File

@@ -427,6 +427,7 @@ _readConstraint(void)
case CONSTR_PRIMARY:
READ_NODE_FIELD(keys);
READ_BOOL_FIELD(without_overlaps);
READ_NODE_FIELD(including);
READ_NODE_FIELD(options);
READ_STRING_FIELD(indexname);
@@ -438,6 +439,7 @@ _readConstraint(void)
case CONSTR_UNIQUE:
READ_BOOL_FIELD(nulls_not_distinct);
READ_NODE_FIELD(keys);
READ_BOOL_FIELD(without_overlaps);
READ_NODE_FIELD(including);
READ_NODE_FIELD(options);
READ_STRING_FIELD(indexname);