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Assign constraint name when cloning FK definition for partitions 

This is for example used when attaching a partition to a partitioned
table which includes foreign keys, and in this case the constraint name
has been missing in the data cloned.  This could lead to hard crashes,
as when validating the foreign key constraint, the constraint name is
always expected.  Particularly, when using log_min_messages >= DEBUG1, a
log message would be generated with this unassigned constraint name,
leading to an assertion failure on HEAD.

While on it, rename a variable in ATExecAttachPartition which was
declared twice with the same name.

Author: Michael Paquier
Reviewed-by: Álvaro Herrera
Discussion: https://postgr.es/m/20181005042236.GG1629@paquier.xyz
Backpatch-through: 11
This commit is contained in:
Michael Paquier 2018-10-06 14:59:52 +09:00
parent 076cfffb39
commit c905b67b79
2 changed files with 8 additions and 7 deletions
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1
src/backend/catalog/pg_constraint.c
View File

@ -574,6 +574,7 @@ CloneForeignKeyConstraints(Oid parentId, Oid relationId, List **cloned)
fkconstraint = makeNode(Constraint);
/* for now this is all we need */
fkconstraint->conname = pstrdup(NameStr(constrForm->conname));
fkconstraint->fk_upd_action = constrForm->confupdtype;
fkconstraint->fk_del_action = constrForm->confdeltype;
fkconstraint->deferrable = constrForm->condeferrable;

14
src/backend/commands/tablecmds.c
View File

@ -14219,21 +14219,21 @@ ATExecAttachPartition(List **wqueue, Relation rel, PartitionCmd *cmd)
RelationGetRelid(attachrel), &cloned);
foreach(l, cloned)
{
ClonedConstraint *cloned = lfirst(l);
ClonedConstraint *clonedcon = lfirst(l);
NewConstraint *newcon;
Relation clonedrel;
AlteredTableInfo *parttab;
clonedrel = relation_open(cloned->relid, NoLock);
clonedrel = relation_open(clonedcon->relid, NoLock);
parttab = ATGetQueueEntry(wqueue, clonedrel);
newcon = (NewConstraint *) palloc0(sizeof(NewConstraint));
newcon->name = cloned->constraint->conname;
newcon->name = clonedcon->constraint->conname;
newcon->contype = CONSTR_FOREIGN;
newcon->refrelid = cloned->refrelid;
newcon->refindid = cloned->conindid;
newcon->conid = cloned->conid;
newcon->qual = (Node *) cloned->constraint;
newcon->refrelid = clonedcon->refrelid;
newcon->refindid = clonedcon->conindid;
newcon->conid = clonedcon->conid;
newcon->qual = (Node *) clonedcon->constraint;
parttab->constraints = lappend(parttab->constraints, newcon);