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Commite5da0fe

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committed
Catalog domain not-null constraints
This applies the explicit catalog representation of not-nullconstraints introduced byb0e96f3 for table constraints also todomain not-null constraints.Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>Reviewed-by: jian he <jian.universality@gmail.com>Discussion:https://www.postgresql.org/message-id/flat/9ec24d7b-633d-463a-84c6-7acff769c9e8%40eisentraut.org
1 parentc9c260d commite5da0fe

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10 files changed

+386
-115
lines changed

10 files changed

+386
-115
lines changed

‎src/backend/catalog/information_schema.sql

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -445,7 +445,7 @@ CREATE VIEW check_constraints AS
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SELECT current_database()::information_schema.sql_identifierAS constraint_catalog,
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rs.nspname::information_schema.sql_identifierAS constraint_schema,
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con.conname::information_schema.sql_identifierAS constraint_name,
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pg_catalog.format('%s IS NOT NULL',at.attname)::information_schema.character_dataAS check_clause
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pg_catalog.format('%s IS NOT NULL',coalesce(at.attname,'VALUE'))::information_schema.character_dataAS check_clause
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FROM pg_constraint con
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LEFT JOIN pg_namespace rsONrs.oid=con.connamespace
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LEFT JOIN pg_class cONc.oid=con.conrelid

‎src/backend/catalog/pg_constraint.c

Lines changed: 44 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -629,6 +629,50 @@ findNotNullConstraint(Oid relid, const char *colname)
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returnfindNotNullConstraintAttnum(relid,attnum);
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}
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/*
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* Find and return the pg_constraint tuple that implements a validated
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* not-null constraint for the given domain.
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*/
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HeapTuple
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findDomainNotNullConstraint(Oidtypid)
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{
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Relationpg_constraint;
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HeapTupleconTup,
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retval=NULL;
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SysScanDescscan;
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ScanKeyDatakey;
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pg_constraint=table_open(ConstraintRelationId,AccessShareLock);
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ScanKeyInit(&key,
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Anum_pg_constraint_contypid,
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BTEqualStrategyNumber,F_OIDEQ,
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ObjectIdGetDatum(typid));
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scan=systable_beginscan(pg_constraint,ConstraintRelidTypidNameIndexId,
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true,NULL,1,&key);
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while (HeapTupleIsValid(conTup=systable_getnext(scan)))
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{
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Form_pg_constraintcon= (Form_pg_constraint)GETSTRUCT(conTup);
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/*
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* We're looking for a NOTNULL constraint that's marked validated.
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*/
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if (con->contype!=CONSTRAINT_NOTNULL)
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continue;
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if (!con->convalidated)
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continue;
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/* Found it */
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retval=heap_copytuple(conTup);
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break;
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}
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systable_endscan(scan);
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table_close(pg_constraint,AccessShareLock);
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returnretval;
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}
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/*
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* Given a pg_constraint tuple for a not-null constraint, return the column
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* number it is for.

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