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Remove deprecated COMMENT ON RULE syntax

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This was only used for allowing upgrades from pre-7.3 instances, which
was a long time ago.
This commit is contained in:
Peter Eisentraut
2017-02-22 08:45:14 -05:00
parent 9e43e8714c
commit e8d016d819
7 changed files with 54 additions and 149 deletions
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128
src/backend/catalog/objectaddress.c
View File

@ -1325,6 +1325,8 @@ get_object_address_relobject(ObjectType objtype, List *objname,
Relation relation = NULL;
int nnames;
const char *depname;
List *relname;
Oid reloid;
/* Extract name of dependent object. */
depname = strVal(llast(objname));
@ -1332,88 +1334,58 @@ get_object_address_relobject(ObjectType objtype, List *objname,
/* Separate relation name from dependent object name. */
nnames = list_length(objname);
if (nnames < 2)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("must specify relation and object name")));
/* Extract relation name and open relation. */
relname = list_truncate(list_copy(objname), nnames - 1);
relation = heap_openrv_extended(makeRangeVarFromNameList(relname),
AccessShareLock,
missing_ok);
reloid = relation ? RelationGetRelid(relation) : InvalidOid;
switch (objtype)
{
Oid reloid;
/*
* For compatibility with very old releases, we sometimes allow users
* to attempt to specify a rule without mentioning the relation name.
* If there's only rule by that name in the entire database, this will
* work. But objects other than rules don't get this special
* treatment.
*/
if (objtype != OBJECT_RULE)
elog(ERROR, "must specify relation and object name");
address.classId = RewriteRelationId;
address.objectId =
get_rewrite_oid_without_relid(depname, &reloid, missing_ok);
address.objectSubId = 0;
/*
* Caller is expecting to get back the relation, even though we didn't
* end up using it to find the rule.
*/
if (OidIsValid(address.objectId))
relation = heap_open(reloid, AccessShareLock);
case OBJECT_RULE:
address.classId = RewriteRelationId;
address.objectId = relation ?
get_rewrite_oid(reloid, depname, missing_ok) : InvalidOid;
address.objectSubId = 0;
break;
case OBJECT_TRIGGER:
address.classId = TriggerRelationId;
address.objectId = relation ?
get_trigger_oid(reloid, depname, missing_ok) : InvalidOid;
address.objectSubId = 0;
break;
case OBJECT_TABCONSTRAINT:
address.classId = ConstraintRelationId;
address.objectId = relation ?
get_relation_constraint_oid(reloid, depname, missing_ok) :
InvalidOid;
address.objectSubId = 0;
break;
case OBJECT_POLICY:
address.classId = PolicyRelationId;
address.objectId = relation ?
get_relation_policy_oid(reloid, depname, missing_ok) :
InvalidOid;
address.objectSubId = 0;
break;
default:
elog(ERROR, "unrecognized objtype: %d", (int) objtype);
}
else
/* Avoid relcache leak when object not found. */
if (!OidIsValid(address.objectId))
{
List *relname;
Oid reloid;
if (relation != NULL)
heap_close(relation, AccessShareLock);
/* Extract relation name and open relation. */
relname = list_truncate(list_copy(objname), nnames - 1);
relation = heap_openrv_extended(makeRangeVarFromNameList(relname),
AccessShareLock,
missing_ok);
reloid = relation ? RelationGetRelid(relation) : InvalidOid;
switch (objtype)
{
case OBJECT_RULE:
address.classId = RewriteRelationId;
address.objectId = relation ?
get_rewrite_oid(reloid, depname, missing_ok) : InvalidOid;
address.objectSubId = 0;
break;
case OBJECT_TRIGGER:
address.classId = TriggerRelationId;
address.objectId = relation ?
get_trigger_oid(reloid, depname, missing_ok) : InvalidOid;
address.objectSubId = 0;
break;
case OBJECT_TABCONSTRAINT:
address.classId = ConstraintRelationId;
address.objectId = relation ?
get_relation_constraint_oid(reloid, depname, missing_ok) :
InvalidOid;
address.objectSubId = 0;
break;
case OBJECT_POLICY:
address.classId = PolicyRelationId;
address.objectId = relation ?
get_relation_policy_oid(reloid, depname, missing_ok) :
InvalidOid;
address.objectSubId = 0;
break;
default:
elog(ERROR, "unrecognized objtype: %d", (int) objtype);
/* placate compiler, which doesn't know elog won't return */
address.classId = InvalidOid;
address.objectId = InvalidOid;
address.objectSubId = 0;
}
/* Avoid relcache leak when object not found. */
if (!OidIsValid(address.objectId))
{
if (relation != NULL)
heap_close(relation, AccessShareLock);
relation = NULL; /* department of accident prevention */
return address;
}
relation = NULL; /* department of accident prevention */
return address;
}
/* Done. */

10
src/backend/parser/gram.y
View File

@ -6283,16 +6283,6 @@ CommentStmt:
n->comment = $8;
$$ = (Node *) n;
}
| COMMENT ON RULE name IS comment_text
{
/* Obsolete syntax supported for awhile for compatibility */
CommentStmt *n = makeNode(CommentStmt);
n->objtype = OBJECT_RULE;
n->objname = list_make1(makeString($4));
n->objargs = NIL;
n->comment = $6;
$$ = (Node *) n;
}
| COMMENT ON TRANSFORM FOR Typename LANGUAGE name IS comment_text
{
CommentStmt *n = makeNode(CommentStmt);

55
src/backend/rewrite/rewriteSupport.c
View File

@ -114,58 +114,3 @@ get_rewrite_oid(Oid relid, const char *rulename, bool missing_ok)
ReleaseSysCache(tuple);
return ruleoid;
}
/*
* Find rule oid, given only a rule name but no rel OID.
*
* If there's more than one, it's an error. If there aren't any, that's an
* error, too. In general, this should be avoided - it is provided to support
* syntax that is compatible with pre-7.3 versions of PG, where rule names
* were unique across the entire database.
*/
Oid
get_rewrite_oid_without_relid(const char *rulename,
Oid *reloid, bool missing_ok)
{
Relation RewriteRelation;
HeapScanDesc scanDesc;
ScanKeyData scanKeyData;
HeapTuple htup;
Oid ruleoid;
/* Search pg_rewrite for such a rule */
ScanKeyInit(&scanKeyData,
Anum_pg_rewrite_rulename,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(rulename));
RewriteRelation = heap_open(RewriteRelationId, AccessShareLock);
scanDesc = heap_beginscan_catalog(RewriteRelation, 1, &scanKeyData);
htup = heap_getnext(scanDesc, ForwardScanDirection);
if (!HeapTupleIsValid(htup))
{
if (!missing_ok)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("rule \"%s\" does not exist", rulename)));
ruleoid = InvalidOid;
}
else
{
ruleoid = HeapTupleGetOid(htup);
if (reloid != NULL)
*reloid = ((Form_pg_rewrite) GETSTRUCT(htup))->ev_class;
htup = heap_getnext(scanDesc, ForwardScanDirection);
if (HeapTupleIsValid(htup))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
errmsg("there are multiple rules named \"%s\"", rulename),
errhint("Specify a relation name as well as a rule name.")));
}
heap_endscan(scanDesc);
heap_close(RewriteRelation, AccessShareLock);
return ruleoid;
}

2
src/include/rewrite/rewriteSupport.h
View File

@ -22,7 +22,5 @@ extern bool IsDefinedRewriteRule(Oid owningRel, const char *ruleName);
extern void SetRelationRuleStatus(Oid relationId, bool relHasRules);
extern Oid get_rewrite_oid(Oid relid, const char *rulename, bool missing_ok);
extern Oid get_rewrite_oid_without_relid(const char *rulename,
Oid *relid, bool missing_ok);
#endif /* REWRITESUPPORT_H */

2
src/test/modules/test_ddl_deparse/expected/comment_on.out
View File

@ -19,5 +19,5 @@ COMMENT ON FUNCTION c_function_test() IS 'FUNCTION test';
ERROR: function c_function_test() does not exist
COMMENT ON TRIGGER trigger_1 ON datatype_table IS 'TRIGGER test';
NOTICE: DDL test: type simple, tag COMMENT
COMMENT ON RULE rule_1 IS 'RULE test';
COMMENT ON RULE rule_1 ON datatype_table IS 'RULE test';
NOTICE: DDL test: type simple, tag COMMENT

2
src/test/modules/test_ddl_deparse/sql/comment_on.sql
View File

@ -11,4 +11,4 @@ COMMENT ON TABLE datatype_table IS 'This table should contain all native datatyp
COMMENT ON VIEW datatype_view IS 'This is a view';
COMMENT ON FUNCTION c_function_test() IS 'FUNCTION test';
COMMENT ON TRIGGER trigger_1 ON datatype_table IS 'TRIGGER test';
COMMENT ON RULE rule_1 IS 'RULE test';
COMMENT ON RULE rule_1 ON datatype_table IS 'RULE test';

4
src/test/regress/expected/object_address.out
View File

@ -214,8 +214,8 @@ WARNING: error for operator family,{addr_nsp,zwei},{}: access method "addr_nsp"
WARNING: error for operator family,{addr_nsp,zwei},{integer}: access method "addr_nsp" does not exist
WARNING: error for operator family,{eins,zwei,drei},{}: access method "eins" does not exist
WARNING: error for operator family,{eins,zwei,drei},{integer}: access method "eins" does not exist
WARNING: error for rule,{eins},{}: rule "eins" does not exist
WARNING: error for rule,{eins},{integer}: rule "eins" does not exist
WARNING: error for rule,{eins},{}: must specify relation and object name
WARNING: error for rule,{eins},{integer}: must specify relation and object name
WARNING: error for rule,{addr_nsp,zwei},{}: relation "addr_nsp" does not exist
WARNING: error for rule,{addr_nsp,zwei},{integer}: relation "addr_nsp" does not exist
WARNING: error for rule,{eins,zwei,drei},{}: schema "eins" does not exist