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-rw-r--r--src/backend/commands/alter.c4
-rw-r--r--src/backend/commands/indexcmds.c25
-rw-r--r--src/backend/commands/tablecmds.c134
-rw-r--r--src/backend/commands/trigger.c25
4 files changed, 121 insertions, 67 deletions
diff --git a/src/backend/commands/alter.c b/src/backend/commands/alter.c
index 0f4e0f701ab..91df1a0aca7 100644
--- a/src/backend/commands/alter.c
+++ b/src/backend/commands/alter.c
@@ -105,9 +105,8 @@ ExecRenameStmt(RenameStmt *stmt)
{
Oid relid;
- CheckRelationOwnership(stmt->relation, true);
-
relid = RangeVarGetRelid(stmt->relation, false);
+ CheckRelationOwnership(relid, true);
switch (stmt->renameType)
{
@@ -223,7 +222,6 @@ ExecAlterObjectSchemaStmt(AlterObjectSchemaStmt *stmt)
case OBJECT_TABLE:
case OBJECT_VIEW:
case OBJECT_FOREIGN_TABLE:
- CheckRelationOwnership(stmt->relation, true);
AlterTableNamespace(stmt->relation, stmt->newschema,
stmt->objectType, AccessExclusiveLock);
break;
diff --git a/src/backend/commands/indexcmds.c b/src/backend/commands/indexcmds.c
index ab73567ad2a..1a0ee84963d 100644
--- a/src/backend/commands/indexcmds.c
+++ b/src/backend/commands/indexcmds.c
@@ -76,7 +76,8 @@ static char *ChooseIndexNameAddition(List *colnames);
* DefineIndex
* Creates a new index.
*
- * 'heapRelation': the relation the index will apply to.
+ * 'relationId': the OID of the heap relation on which the index is to be
+ * created
* 'indexRelationName': the name for the new index, or NULL to indicate
* that a nonconflicting default name should be picked.
* 'indexRelationId': normally InvalidOid, but during bootstrap can be
@@ -105,7 +106,7 @@ static char *ChooseIndexNameAddition(List *colnames);
* 'concurrent': avoid blocking writers to the table while building.
*/
void
-DefineIndex(RangeVar *heapRelation,
+DefineIndex(Oid relationId,
char *indexRelationName,
Oid indexRelationId,
char *accessMethodName,
@@ -128,7 +129,6 @@ DefineIndex(RangeVar *heapRelation,
Oid *collationObjectId;
Oid *classObjectId;
Oid accessMethodId;
- Oid relationId;
Oid namespaceId;
Oid tablespaceId;
List *indexColNames;
@@ -148,6 +148,7 @@ DefineIndex(RangeVar *heapRelation,
int n_old_snapshots;
LockRelId heaprelid;
LOCKTAG heaplocktag;
+ LOCKMODE lockmode;
Snapshot snapshot;
int i;
@@ -166,14 +167,18 @@ DefineIndex(RangeVar *heapRelation,
INDEX_MAX_KEYS)));
/*
- * Open heap relation, acquire a suitable lock on it, remember its OID
- *
* Only SELECT ... FOR UPDATE/SHARE are allowed while doing a standard
* index build; but for concurrent builds we allow INSERT/UPDATE/DELETE
* (but not VACUUM).
+ *
+ * NB: Caller is responsible for making sure that relationId refers
+ * to the relation on which the index should be built; except in bootstrap
+ * mode, this will typically require the caller to have already locked
+ * the relation. To avoid lock upgrade hazards, that lock should be at
+ * least as strong as the one we take here.
*/
- rel = heap_openrv(heapRelation,
- (concurrent ? ShareUpdateExclusiveLock : ShareLock));
+ lockmode = concurrent ? ShareUpdateExclusiveLock : ShareLock;
+ rel = heap_open(relationId, lockmode);
relationId = RelationGetRelid(rel);
namespaceId = RelationGetNamespace(rel);
@@ -191,12 +196,12 @@ DefineIndex(RangeVar *heapRelation,
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("cannot create index on foreign table \"%s\"",
- heapRelation->relname)));
+ RelationGetRelationName(rel))));
else
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("\"%s\" is not a table",
- heapRelation->relname)));
+ RelationGetRelationName(rel))));
}
/*
@@ -503,7 +508,7 @@ DefineIndex(RangeVar *heapRelation,
*/
/* Open and lock the parent heap relation */
- rel = heap_openrv(heapRelation, ShareUpdateExclusiveLock);
+ rel = heap_open(relationId, ShareUpdateExclusiveLock);
/* And the target index relation */
indexRelation = index_open(indexRelationId, RowExclusiveLock);
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index adf278bb1fa..ae62c698499 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -73,6 +73,7 @@
#include "storage/lock.h"
#include "storage/predicate.h"
#include "storage/smgr.h"
+#include "tcop/utility.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
@@ -272,7 +273,8 @@ static void checkFkeyPermissions(Relation rel, int16 *attnums, int natts);
static void validateForeignKeyConstraint(char *conname,
Relation rel, Relation pkrel,
Oid pkindOid, Oid constraintOid);
-static void createForeignKeyTriggers(Relation rel, Constraint *fkconstraint,
+static void createForeignKeyTriggers(Relation rel, Oid refRelOid,
+ Constraint *fkconstraint,
Oid constraintOid, Oid indexOid);
static void ATController(Relation rel, List *cmds, bool recurse, LOCKMODE lockmode);
static void ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
@@ -346,7 +348,8 @@ static bool ATColumnChangeRequiresRewrite(Node *expr, AttrNumber varattno);
static void ATExecAlterColumnType(AlteredTableInfo *tab, Relation rel,
AlterTableCmd *cmd, LOCKMODE lockmode);
static void ATPostAlterTypeCleanup(List **wqueue, AlteredTableInfo *tab, LOCKMODE lockmode);
-static void ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode);
+static void ATPostAlterTypeParse(Oid oldRelId, Oid refRelId, char *cmd,
+ List **wqueue, LOCKMODE lockmode);
static void change_owner_fix_column_acls(Oid relationOid,
Oid oldOwnerId, Oid newOwnerId);
static void change_owner_recurse_to_sequences(Oid relationOid,
@@ -2378,15 +2381,13 @@ CheckTableNotInUse(Relation rel, const char *stmt)
* rather than reassess it at lower levels.
*/
void
-AlterTable(AlterTableStmt *stmt)
+AlterTable(Oid relid, AlterTableStmt *stmt)
{
Relation rel;
LOCKMODE lockmode = AlterTableGetLockLevel(stmt->cmds);
- /*
- * Acquire same level of lock as already acquired during parsing.
- */
- rel = relation_openrv(stmt->relation, lockmode);
+ /* Caller is required to provide an adequate lock. */
+ rel = relation_open(relid, NoLock);
CheckTableNotInUse(rel, "ALTER TABLE");
@@ -5153,7 +5154,7 @@ ATExecAddIndex(AlteredTableInfo *tab, Relation rel,
/* The IndexStmt has already been through transformIndexStmt */
- DefineIndex(stmt->relation, /* relation */
+ DefineIndex(RelationGetRelid(rel), /* relation */
stmt->idxname, /* index name */
InvalidOid, /* no predefined OID */
stmt->accessMethod, /* am name */
@@ -5465,7 +5466,10 @@ ATAddForeignKeyConstraint(AlteredTableInfo *tab, Relation rel,
* table; trying to start with a lesser lock will just create a risk of
* deadlock.)
*/
- pkrel = heap_openrv(fkconstraint->pktable, AccessExclusiveLock);
+ if (OidIsValid(fkconstraint->old_pktable_oid))
+ pkrel = heap_open(fkconstraint->old_pktable_oid, AccessExclusiveLock);
+ else
+ pkrel = heap_openrv(fkconstraint->pktable, AccessExclusiveLock);
/*
* Validity checks (permission checks wait till we have the column
@@ -5713,7 +5717,8 @@ ATAddForeignKeyConstraint(AlteredTableInfo *tab, Relation rel,
/*
* Create the triggers that will enforce the constraint.
*/
- createForeignKeyTriggers(rel, fkconstraint, constrOid, indexOid);
+ createForeignKeyTriggers(rel, RelationGetRelid(pkrel), fkconstraint,
+ constrOid, indexOid);
/*
* Tell Phase 3 to check that the constraint is satisfied by existing rows.
@@ -6202,14 +6207,14 @@ validateForeignKeyConstraint(char *conname,
}
static void
-CreateFKCheckTrigger(RangeVar *myRel, Constraint *fkconstraint,
+CreateFKCheckTrigger(Oid myRelOid, Oid refRelOid, Constraint *fkconstraint,
Oid constraintOid, Oid indexOid, bool on_insert)
{
CreateTrigStmt *fk_trigger;
fk_trigger = makeNode(CreateTrigStmt);
fk_trigger->trigname = "RI_ConstraintTrigger";
- fk_trigger->relation = myRel;
+ fk_trigger->relation = NULL;
fk_trigger->row = true;
fk_trigger->timing = TRIGGER_TYPE_AFTER;
@@ -6230,10 +6235,11 @@ CreateFKCheckTrigger(RangeVar *myRel, Constraint *fkconstraint,
fk_trigger->isconstraint = true;
fk_trigger->deferrable = fkconstraint->deferrable;
fk_trigger->initdeferred = fkconstraint->initdeferred;
- fk_trigger->constrrel = fkconstraint->pktable;
+ fk_trigger->constrrel = NULL;
fk_trigger->args = NIL;
- (void) CreateTrigger(fk_trigger, NULL, constraintOid, indexOid, true);
+ (void) CreateTrigger(fk_trigger, NULL, myRelOid, refRelOid, constraintOid,
+ indexOid, true);
/* Make changes-so-far visible */
CommandCounterIncrement();
@@ -6243,18 +6249,13 @@ CreateFKCheckTrigger(RangeVar *myRel, Constraint *fkconstraint,
* Create the triggers that implement an FK constraint.
*/
static void
-createForeignKeyTriggers(Relation rel, Constraint *fkconstraint,
+createForeignKeyTriggers(Relation rel, Oid refRelOid, Constraint *fkconstraint,
Oid constraintOid, Oid indexOid)
{
- RangeVar *myRel;
+ Oid myRelOid;
CreateTrigStmt *fk_trigger;
- /*
- * Reconstruct a RangeVar for my relation (not passed in, unfortunately).
- */
- myRel = makeRangeVar(get_namespace_name(RelationGetNamespace(rel)),
- pstrdup(RelationGetRelationName(rel)),
- -1);
+ myRelOid = RelationGetRelid(rel);
/* Make changes-so-far visible */
CommandCounterIncrement();
@@ -6265,14 +6266,14 @@ createForeignKeyTriggers(Relation rel, Constraint *fkconstraint,
*/
fk_trigger = makeNode(CreateTrigStmt);
fk_trigger->trigname = "RI_ConstraintTrigger";
- fk_trigger->relation = fkconstraint->pktable;
+ fk_trigger->relation = NULL;
fk_trigger->row = true;
fk_trigger->timing = TRIGGER_TYPE_AFTER;
fk_trigger->events = TRIGGER_TYPE_DELETE;
fk_trigger->columns = NIL;
fk_trigger->whenClause = NULL;
fk_trigger->isconstraint = true;
- fk_trigger->constrrel = myRel;
+ fk_trigger->constrrel = NULL;
switch (fkconstraint->fk_del_action)
{
case FKCONSTR_ACTION_NOACTION:
@@ -6307,7 +6308,8 @@ createForeignKeyTriggers(Relation rel, Constraint *fkconstraint,
}
fk_trigger->args = NIL;
- (void) CreateTrigger(fk_trigger, NULL, constraintOid, indexOid, true);
+ (void) CreateTrigger(fk_trigger, NULL, refRelOid, myRelOid, constraintOid,
+ indexOid, true);
/* Make changes-so-far visible */
CommandCounterIncrement();
@@ -6318,14 +6320,14 @@ createForeignKeyTriggers(Relation rel, Constraint *fkconstraint,
*/
fk_trigger = makeNode(CreateTrigStmt);
fk_trigger->trigname = "RI_ConstraintTrigger";
- fk_trigger->relation = fkconstraint->pktable;
+ fk_trigger->relation = NULL;
fk_trigger->row = true;
fk_trigger->timing = TRIGGER_TYPE_AFTER;
fk_trigger->events = TRIGGER_TYPE_UPDATE;
fk_trigger->columns = NIL;
fk_trigger->whenClause = NULL;
fk_trigger->isconstraint = true;
- fk_trigger->constrrel = myRel;
+ fk_trigger->constrrel = NULL;
switch (fkconstraint->fk_upd_action)
{
case FKCONSTR_ACTION_NOACTION:
@@ -6360,7 +6362,8 @@ createForeignKeyTriggers(Relation rel, Constraint *fkconstraint,
}
fk_trigger->args = NIL;
- (void) CreateTrigger(fk_trigger, NULL, constraintOid, indexOid, true);
+ (void) CreateTrigger(fk_trigger, NULL, refRelOid, myRelOid, constraintOid,
+ indexOid, true);
/* Make changes-so-far visible */
CommandCounterIncrement();
@@ -6380,8 +6383,10 @@ createForeignKeyTriggers(Relation rel, Constraint *fkconstraint,
* and the use of self-referential FKs is rare enough, that we live with
* it for now. There will be a real fix in PG 9.2.
*/
- CreateFKCheckTrigger(myRel, fkconstraint, constraintOid, indexOid, true);
- CreateFKCheckTrigger(myRel, fkconstraint, constraintOid, indexOid, false);
+ CreateFKCheckTrigger(myRelOid, refRelOid, fkconstraint, constraintOid,
+ indexOid, true);
+ CreateFKCheckTrigger(myRelOid, refRelOid, fkconstraint, constraintOid,
+ indexOid, false);
}
/*
@@ -7179,7 +7184,8 @@ static void
ATPostAlterTypeCleanup(List **wqueue, AlteredTableInfo *tab, LOCKMODE lockmode)
{
ObjectAddress obj;
- ListCell *l;
+ ListCell *def_item;
+ ListCell *oid_item;
/*
* Re-parse the index and constraint definitions, and attach them to the
@@ -7188,11 +7194,36 @@ ATPostAlterTypeCleanup(List **wqueue, AlteredTableInfo *tab, LOCKMODE lockmode)
* lock on the table the constraint is attached to, and we need to get
* that before dropping. It's safe because the parser won't actually look
* at the catalogs to detect the existing entry.
+ *
+ * We can't rely on the output of deparsing to tell us which relation
+ * to operate on, because concurrent activity might have made the name
+ * resolve differently. Instead, we've got to use the OID of the
+ * constraint or index we're processing to figure out which relation
+ * to operate on.
*/
- foreach(l, tab->changedIndexDefs)
- ATPostAlterTypeParse((char *) lfirst(l), wqueue, lockmode);
- foreach(l, tab->changedConstraintDefs)
- ATPostAlterTypeParse((char *) lfirst(l), wqueue, lockmode);
+ forboth(oid_item, tab->changedConstraintOids,
+ def_item, tab->changedConstraintDefs)
+ {
+ Oid oldId = lfirst_oid(oid_item);
+ Oid relid;
+ Oid confrelid;
+
+ get_constraint_relation_oids(oldId, &relid, &confrelid);
+ ATPostAlterTypeParse(relid, confrelid,
+ (char *) lfirst(def_item),
+ wqueue, lockmode);
+ }
+ forboth(oid_item, tab->changedIndexOids,
+ def_item, tab->changedIndexDefs)
+ {
+ Oid oldId = lfirst_oid(oid_item);
+ Oid relid;
+
+ relid = IndexGetRelation(oldId);
+ ATPostAlterTypeParse(relid, InvalidOid,
+ (char *) lfirst(def_item),
+ wqueue, lockmode);
+ }
/*
* Now we can drop the existing constraints and indexes --- constraints
@@ -7202,18 +7233,18 @@ ATPostAlterTypeCleanup(List **wqueue, AlteredTableInfo *tab, LOCKMODE lockmode)
* should be okay to use DROP_RESTRICT here, since nothing else should be
* depending on these objects.
*/
- foreach(l, tab->changedConstraintOids)
+ foreach(oid_item, tab->changedConstraintOids)
{
obj.classId = ConstraintRelationId;
- obj.objectId = lfirst_oid(l);
+ obj.objectId = lfirst_oid(oid_item);
obj.objectSubId = 0;
performDeletion(&obj, DROP_RESTRICT);
}
- foreach(l, tab->changedIndexOids)
+ foreach(oid_item, tab->changedIndexOids)
{
obj.classId = RelationRelationId;
- obj.objectId = lfirst_oid(l);
+ obj.objectId = lfirst_oid(oid_item);
obj.objectSubId = 0;
performDeletion(&obj, DROP_RESTRICT);
}
@@ -7225,11 +7256,13 @@ ATPostAlterTypeCleanup(List **wqueue, AlteredTableInfo *tab, LOCKMODE lockmode)
}
static void
-ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode)
+ATPostAlterTypeParse(Oid oldRelId, Oid refRelId, char *cmd, List **wqueue,
+ LOCKMODE lockmode)
{
List *raw_parsetree_list;
List *querytree_list;
ListCell *list_item;
+ Relation rel;
/*
* We expect that we will get only ALTER TABLE and CREATE INDEX
@@ -7245,16 +7278,21 @@ ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode)
if (IsA(stmt, IndexStmt))
querytree_list = lappend(querytree_list,
- transformIndexStmt((IndexStmt *) stmt,
+ transformIndexStmt(oldRelId,
+ (IndexStmt *) stmt,
cmd));
else if (IsA(stmt, AlterTableStmt))
querytree_list = list_concat(querytree_list,
- transformAlterTableStmt((AlterTableStmt *) stmt,
+ transformAlterTableStmt(oldRelId,
+ (AlterTableStmt *) stmt,
cmd));
else
querytree_list = lappend(querytree_list, stmt);
}
+ /* Caller should already have acquired whatever lock we need. */
+ rel = relation_open(oldRelId, NoLock);
+
/*
* Attach each generated command to the proper place in the work queue.
* Note this could result in creation of entirely new work-queue entries.
@@ -7266,7 +7304,6 @@ ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode)
foreach(list_item, querytree_list)
{
Node *stm = (Node *) lfirst(list_item);
- Relation rel;
AlteredTableInfo *tab;
switch (nodeTag(stm))
@@ -7276,14 +7313,12 @@ ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode)
IndexStmt *stmt = (IndexStmt *) stm;
AlterTableCmd *newcmd;
- rel = relation_openrv(stmt->relation, lockmode);
tab = ATGetQueueEntry(wqueue, rel);
newcmd = makeNode(AlterTableCmd);
newcmd->subtype = AT_ReAddIndex;
newcmd->def = (Node *) stmt;
tab->subcmds[AT_PASS_OLD_INDEX] =
lappend(tab->subcmds[AT_PASS_OLD_INDEX], newcmd);
- relation_close(rel, NoLock);
break;
}
case T_AlterTableStmt:
@@ -7291,7 +7326,6 @@ ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode)
AlterTableStmt *stmt = (AlterTableStmt *) stm;
ListCell *lcmd;
- rel = relation_openrv(stmt->relation, lockmode);
tab = ATGetQueueEntry(wqueue, rel);
foreach(lcmd, stmt->cmds)
{
@@ -7314,7 +7348,6 @@ ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode)
(int) cmd->subtype);
}
}
- relation_close(rel, NoLock);
break;
}
default:
@@ -7322,8 +7355,9 @@ ATPostAlterTypeParse(char *cmd, List **wqueue, LOCKMODE lockmode)
(int) nodeTag(stm));
}
}
-}
+ relation_close(rel, NoLock);
+}
/*
* ALTER TABLE OWNER
@@ -9002,7 +9036,8 @@ ATExecGenericOptions(Relation rel, List *options)
/*
* Execute ALTER TABLE SET SCHEMA
*
- * Note: caller must have checked ownership of the relation already
+ * WARNING WARNING WARNING: In previous *minor* releases the caller was
+ * responsible for checking ownership of the relation, but now we do it here.
*/
void
AlterTableNamespace(RangeVar *relation, const char *newschema,
@@ -9017,6 +9052,7 @@ AlterTableNamespace(RangeVar *relation, const char *newschema,
rel = relation_openrv(relation, lockmode);
relid = RelationGetRelid(rel);
+ CheckRelationOwnership(relid, true);
oldNspOid = RelationGetNamespace(rel);
/* Check relation type against type specified in the ALTER command */
diff --git a/src/backend/commands/trigger.c b/src/backend/commands/trigger.c
index ab87562d0ce..3c2447671c7 100644
--- a/src/backend/commands/trigger.c
+++ b/src/backend/commands/trigger.c
@@ -92,6 +92,13 @@ static void AfterTriggerSaveEvent(EState *estate, ResultRelInfo *relinfo,
* queryString is the source text of the CREATE TRIGGER command.
* This must be supplied if a whenClause is specified, else it can be NULL.
*
+ * relOid, if nonzero, is the relation on which the trigger should be
+ * created. If zero, the name provided in the statement will be looked up.
+ *
+ * refRelOid, if nonzero, is the relation to which the constraint trigger
+ * refers. If zero, the constraint relation name provided in the statement
+ * will be looked up as needed.
+ *
* constraintOid, if nonzero, says that this trigger is being created
* internally to implement that constraint. A suitable pg_depend entry will
* be made to link the trigger to that constraint. constraintOid is zero when
@@ -114,7 +121,7 @@ static void AfterTriggerSaveEvent(EState *estate, ResultRelInfo *relinfo,
*/
Oid
CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
- Oid constraintOid, Oid indexOid,
+ Oid relOid, Oid refRelOid, Oid constraintOid, Oid indexOid,
bool isInternal)
{
int16 tgtype;
@@ -143,7 +150,10 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
ObjectAddress myself,
referenced;
- rel = heap_openrv(stmt->relation, AccessExclusiveLock);
+ if (OidIsValid(relOid))
+ rel = heap_open(relOid, AccessExclusiveLock);
+ else
+ rel = heap_openrv(stmt->relation, AccessExclusiveLock);
/*
* Triggers must be on tables or views, and there are additional
@@ -192,8 +202,13 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
errmsg("permission denied: \"%s\" is a system catalog",
RelationGetRelationName(rel))));
- if (stmt->isconstraint && stmt->constrrel != NULL)
- constrrelid = RangeVarGetRelid(stmt->constrrel, false);
+ if (stmt->isconstraint)
+ {
+ if (OidIsValid(refRelOid))
+ constrrelid = refRelOid;
+ else if (stmt->constrrel != NULL)
+ constrrelid = RangeVarGetRelid(stmt->constrrel, false);
+ }
/* permission checks */
if (!isInternal)
@@ -501,7 +516,7 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg("trigger \"%s\" for relation \"%s\" already exists",
- trigname, stmt->relation->relname)));
+ trigname, RelationGetRelationName(rel))));
}
systable_endscan(tgscan);
}
generated by cgit v1.2.3 (git 2.46.0) at 2025-08-31 05:01:59 +0000