greenplumn pg_operator 源码
greenplumn pg_operator 代码
文件路径：/src/backend/catalog/pg_operator.c
/*-------------------------------------------------------------------------
*
* pg_operator.c
* routines to support manipulation of the pg_operator relation
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/catalog/pg_operator.c
*
* NOTES
* these routines moved here from commands/define.c and somewhat cleaned up.
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/htup_details.h"
#include "access/table.h"
#include "access/xact.h"
#include "catalog/catalog.h"
#include "catalog/dependency.h"
#include "catalog/indexing.h"
#include "catalog/namespace.h"
#include "catalog/objectaccess.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_type.h"
#include "miscadmin.h"
#include "parser/parse_oper.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/syscache.h"
#include "catalog/oid_dispatch.h"
static Oid OperatorGet(const char *operatorName,
Oid operatorNamespace,
Oid leftObjectId,
Oid rightObjectId,
bool *defined);
static Oid OperatorLookup(List *operatorName,
Oid leftObjectId,
Oid rightObjectId,
bool *defined);
static Oid OperatorShellMake(const char *operatorName,
Oid operatorNamespace,
Oid leftTypeId,
Oid rightTypeId);
static Oid get_other_operator(List *otherOp,
Oid otherLeftTypeId, Oid otherRightTypeId,
const char *operatorName, Oid operatorNamespace,
Oid leftTypeId, Oid rightTypeId,
bool isCommutator);
/*
* Check whether a proposed operator name is legal
*
* This had better match the behavior of parser/scan.l!
*
* We need this because the parser is not smart enough to check that
* the arguments of CREATE OPERATOR's COMMUTATOR, NEGATOR, etc clauses
* are operator names rather than some other lexical entity.
*/
static bool
validOperatorName(const char *name)
{
size_t len = strlen(name);
/* Can't be empty or too long */
if (len == 0 || len >= NAMEDATALEN)
return false;
/* Can't contain any invalid characters */
/* Test string here should match op_chars in scan.l */
if (strspn(name, "~!@#^&|`?+-*/%<>=") != len)
return false;
/* Can't contain slash-star or dash-dash (comment starts) */
if (strstr(name, "/*") || strstr(name, "--"))
return false;
/*
* For SQL standard compatibility, '+' and '-' cannot be the last char of
* a multi-char operator unless the operator contains chars that are not
* in SQL operators. The idea is to lex '=-' as two operators, but not to
* forbid operator names like '?-' that could not be sequences of standard
* SQL operators.
*/
if (len > 1 &&
(name[len - 1] == '+' ||
name[len - 1] == '-'))
{
int ic;
for (ic = len - 2; ic >= 0; ic--)
{
if (strchr("~!@#^&|`?%", name[ic]))
break;
}
if (ic < 0)
return false; /* nope, not valid */
}
/* != isn't valid either, because parser will convert it to <> */
if (strcmp(name, "!=") == 0)
return false;
return true;
}
/*
* OperatorGet
*
* finds an operator given an exact specification (name, namespace,
* left and right type IDs).
*
* *defined is set true if defined (not a shell)
*/
static Oid
OperatorGet(const char *operatorName,
Oid operatorNamespace,
Oid leftObjectId,
Oid rightObjectId,
bool *defined)
{
HeapTuple tup;
Oid operatorObjectId;
tup = SearchSysCache4(OPERNAMENSP,
PointerGetDatum(operatorName),
ObjectIdGetDatum(leftObjectId),
ObjectIdGetDatum(rightObjectId),
ObjectIdGetDatum(operatorNamespace));
if (HeapTupleIsValid(tup))
{
Form_pg_operator oprform = (Form_pg_operator) GETSTRUCT(tup);
operatorObjectId = oprform->oid;
*defined = RegProcedureIsValid(oprform->oprcode);
ReleaseSysCache(tup);
}
else
{
operatorObjectId = InvalidOid;
*defined = false;
}
return operatorObjectId;
}
/*
* OperatorLookup
*
* looks up an operator given a possibly-qualified name and
* left and right type IDs.
*
* *defined is set true if defined (not a shell)
*/
static Oid
OperatorLookup(List *operatorName,
Oid leftObjectId,
Oid rightObjectId,
bool *defined)
{
Oid operatorObjectId;
RegProcedure oprcode;
operatorObjectId = LookupOperName(NULL, operatorName,
leftObjectId, rightObjectId,
true, -1);
if (!OidIsValid(operatorObjectId))
{
*defined = false;
return InvalidOid;
}
oprcode = get_opcode(operatorObjectId);
*defined = RegProcedureIsValid(oprcode);
return operatorObjectId;
}
/*
* OperatorShellMake
* Make a "shell" entry for a not-yet-existing operator.
*/
static Oid
OperatorShellMake(const char *operatorName,
Oid operatorNamespace,
Oid leftTypeId,
Oid rightTypeId)
{
Relation pg_operator_desc;
Oid operatorObjectId;
int i;
HeapTuple tup;
Datum values[Natts_pg_operator];
bool nulls[Natts_pg_operator];
NameData oname;
TupleDesc tupDesc;
/*
* validate operator name
*/
if (!validOperatorName(operatorName))
ereport(ERROR,
(errcode(ERRCODE_INVALID_NAME),
errmsg("\"%s\" is not a valid operator name",
operatorName)));
/*
* open pg_operator
*/
pg_operator_desc = table_open(OperatorRelationId, RowExclusiveLock);
tupDesc = pg_operator_desc->rd_att;
/*
* initialize our *nulls and *values arrays
*/
for (i = 0; i < Natts_pg_operator; ++i)
{
nulls[i] = false;
values[i] = (Datum) NULL; /* redundant, but safe */
}
/*
* initialize values[] with the operator name and input data types. Note
* that oprcode is set to InvalidOid, indicating it's a shell.
*/
operatorObjectId = GetNewOidForOperator(pg_operator_desc, OperatorOidIndexId,
Anum_pg_operator_oid,
unconstify(char *, operatorName),
leftTypeId, rightTypeId,
operatorNamespace);
values[Anum_pg_operator_oid - 1] = ObjectIdGetDatum(operatorObjectId);
namestrcpy(&oname, operatorName);
values[Anum_pg_operator_oprname - 1] = NameGetDatum(&oname);
values[Anum_pg_operator_oprnamespace - 1] = ObjectIdGetDatum(operatorNamespace);
values[Anum_pg_operator_oprowner - 1] = ObjectIdGetDatum(GetUserId());
values[Anum_pg_operator_oprkind - 1] = CharGetDatum(leftTypeId ? (rightTypeId ? 'b' : 'r') : 'l');
values[Anum_pg_operator_oprcanmerge - 1] = BoolGetDatum(false);
values[Anum_pg_operator_oprcanhash - 1] = BoolGetDatum(false);
values[Anum_pg_operator_oprleft - 1] = ObjectIdGetDatum(leftTypeId);
values[Anum_pg_operator_oprright - 1] = ObjectIdGetDatum(rightTypeId);
values[Anum_pg_operator_oprresult - 1] = ObjectIdGetDatum(InvalidOid);
values[Anum_pg_operator_oprcom - 1] = ObjectIdGetDatum(InvalidOid);
values[Anum_pg_operator_oprnegate - 1] = ObjectIdGetDatum(InvalidOid);
values[Anum_pg_operator_oprcode - 1] = ObjectIdGetDatum(InvalidOid);
values[Anum_pg_operator_oprrest - 1] = ObjectIdGetDatum(InvalidOid);
values[Anum_pg_operator_oprjoin - 1] = ObjectIdGetDatum(InvalidOid);
/*
* create a new operator tuple
*/
tup = heap_form_tuple(tupDesc, values, nulls);
/*
* insert our "shell" operator tuple
*/
CatalogTupleInsert(pg_operator_desc, tup);
/* Add dependencies for the entry */
makeOperatorDependencies(tup, false);
heap_freetuple(tup);
/* Post creation hook for new shell operator */
InvokeObjectPostCreateHook(OperatorRelationId, operatorObjectId, 0);
/*
* Make sure the tuple is visible for subsequent lookups/updates.
*/
CommandCounterIncrement();
/*
* close the operator relation and return the oid.
*/
table_close(pg_operator_desc, RowExclusiveLock);
return operatorObjectId;
}
/*
* OperatorCreate
*
* "X" indicates an optional argument (i.e. one that can be NULL or 0)
* operatorName name for new operator
* operatorNamespace namespace for new operator
* leftTypeId X left type ID
* rightTypeId X right type ID
* procedureId procedure ID for operator
* commutatorName X commutator operator
* negatorName X negator operator
* restrictionId X restriction selectivity procedure ID
* joinId X join selectivity procedure ID
* canMerge merge join can be used with this operator
* canHash hash join can be used with this operator
*
* The caller should have validated properties and permissions for the
* objects passed as OID references. We must handle the commutator and
* negator operator references specially, however, since those need not
* exist beforehand.
*
* This routine gets complicated because it allows the user to
* specify operators that do not exist. For example, if operator
* "op" is being defined, the negator operator "negop" and the
* commutator "commop" can also be defined without specifying
* any information other than their names. Since in order to
* add "op" to the PG_OPERATOR catalog, all the Oid's for these
* operators must be placed in the fields of "op", a forward
* declaration is done on the commutator and negator operators.
* This is called creating a shell, and its main effect is to
* create a tuple in the PG_OPERATOR catalog with minimal
* information about the operator (just its name and types).
* Forward declaration is used only for this purpose, it is
* not available to the user as it is for type definition.
*/
ObjectAddress
OperatorCreate(const char *operatorName,
Oid operatorNamespace,
Oid leftTypeId,
Oid rightTypeId,
Oid procedureId,
List *commutatorName,
List *negatorName,
Oid restrictionId,
Oid joinId,
bool canMerge,
bool canHash)
{
Relation pg_operator_desc;
HeapTuple tup;
bool isUpdate;
bool nulls[Natts_pg_operator];
bool replaces[Natts_pg_operator];
Datum values[Natts_pg_operator];
Oid operatorObjectId;
bool operatorAlreadyDefined;
Oid operResultType;
Oid commutatorId,
negatorId;
bool selfCommutator = false;
NameData oname;
int i;
ObjectAddress address;
/*
* Sanity checks
*/
if (!validOperatorName(operatorName))
ereport(ERROR,
(errcode(ERRCODE_INVALID_NAME),
errmsg("\"%s\" is not a valid operator name",
operatorName)));
if (!(OidIsValid(leftTypeId) && OidIsValid(rightTypeId)))
{
/* If it's not a binary op, these things mustn't be set: */
if (commutatorName)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only binary operators can have commutators")));
if (OidIsValid(joinId))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only binary operators can have join selectivity")));
if (canMerge)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only binary operators can merge join")));
if (canHash)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only binary operators can hash")));
}
operResultType = get_func_rettype(procedureId);
if (operResultType != BOOLOID)
{
/* If it's not a boolean op, these things mustn't be set: */
if (negatorName)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only boolean operators can have negators")));
if (OidIsValid(restrictionId))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only boolean operators can have restriction selectivity")));
if (OidIsValid(joinId))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only boolean operators can have join selectivity")));
if (canMerge)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only boolean operators can merge join")));
if (canHash)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("only boolean operators can hash")));
}
operatorObjectId = OperatorGet(operatorName,
operatorNamespace,
leftTypeId,
rightTypeId,
&operatorAlreadyDefined);
if (operatorAlreadyDefined)
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_FUNCTION),
errmsg("operator %s already exists",
operatorName)));
/*
* At this point, if operatorObjectId is not InvalidOid then we are
* filling in a previously-created shell. Insist that the user own any
* such shell.
*/
if (OidIsValid(operatorObjectId) &&
!pg_oper_ownercheck(operatorObjectId, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_OPERATOR,
operatorName);
/*
* Set up the other operators. If they do not currently exist, create
* shells in order to get ObjectId's.
*/
if (commutatorName)
{
/* commutator has reversed arg types */
commutatorId = get_other_operator(commutatorName,
rightTypeId, leftTypeId,
operatorName, operatorNamespace,
leftTypeId, rightTypeId,
true);
/* Permission check: must own other operator */
if (OidIsValid(commutatorId) &&
!pg_oper_ownercheck(commutatorId, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_OPERATOR,
NameListToString(commutatorName));
/*
* self-linkage to this operator; will fix below. Note that only
* self-linkage for commutation makes sense.
*/
if (!OidIsValid(commutatorId))
selfCommutator = true;
}
else
commutatorId = InvalidOid;
if (negatorName)
{
/* negator has same arg types */
negatorId = get_other_operator(negatorName,
leftTypeId, rightTypeId,
operatorName, operatorNamespace,
leftTypeId, rightTypeId,
false);
/* Permission check: must own other operator */
if (OidIsValid(negatorId) &&
!pg_oper_ownercheck(negatorId, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_OPERATOR,
NameListToString(negatorName));
}
else
negatorId = InvalidOid;
/*
* set up values in the operator tuple
*/
for (i = 0; i < Natts_pg_operator; ++i)
{
values[i] = (Datum) NULL;
replaces[i] = true;
nulls[i] = false;
}
namestrcpy(&oname, operatorName);
values[Anum_pg_operator_oprname - 1] = NameGetDatum(&oname);
values[Anum_pg_operator_oprnamespace - 1] = ObjectIdGetDatum(operatorNamespace);
values[Anum_pg_operator_oprowner - 1] = ObjectIdGetDatum(GetUserId());
values[Anum_pg_operator_oprkind - 1] = CharGetDatum(leftTypeId ? (rightTypeId ? 'b' : 'r') : 'l');
values[Anum_pg_operator_oprcanmerge - 1] = BoolGetDatum(canMerge);
values[Anum_pg_operator_oprcanhash - 1] = BoolGetDatum(canHash);
values[Anum_pg_operator_oprleft - 1] = ObjectIdGetDatum(leftTypeId);
values[Anum_pg_operator_oprright - 1] = ObjectIdGetDatum(rightTypeId);
values[Anum_pg_operator_oprresult - 1] = ObjectIdGetDatum(operResultType);
values[Anum_pg_operator_oprcom - 1] = ObjectIdGetDatum(commutatorId);
values[Anum_pg_operator_oprnegate - 1] = ObjectIdGetDatum(negatorId);
values[Anum_pg_operator_oprcode - 1] = ObjectIdGetDatum(procedureId);
values[Anum_pg_operator_oprrest - 1] = ObjectIdGetDatum(restrictionId);
values[Anum_pg_operator_oprjoin - 1] = ObjectIdGetDatum(joinId);
pg_operator_desc = table_open(OperatorRelationId, RowExclusiveLock);
/*
* If we are replacing an operator shell, update; else insert
*/
if (operatorObjectId)
{
isUpdate = true;
tup = SearchSysCacheCopy1(OPEROID,
ObjectIdGetDatum(operatorObjectId));
if (!HeapTupleIsValid(tup))
elog(ERROR, "cache lookup failed for operator %u",
operatorObjectId);
replaces[Anum_pg_operator_oid - 1] = false;
tup = heap_modify_tuple(tup,
RelationGetDescr(pg_operator_desc),
values,
nulls,
replaces);
CatalogTupleUpdate(pg_operator_desc, &tup->t_self, tup);
}
else
{
isUpdate = false;
operatorObjectId = GetNewOidForOperator(pg_operator_desc,
OperatorOidIndexId,
Anum_pg_operator_oid,
NameStr(oname), leftTypeId,
rightTypeId, operatorNamespace);
values[Anum_pg_operator_oid - 1] = ObjectIdGetDatum(operatorObjectId);
tup = heap_form_tuple(RelationGetDescr(pg_operator_desc),
values, nulls);
CatalogTupleInsert(pg_operator_desc, tup);
}
/* Add dependencies for the entry */
address = makeOperatorDependencies(tup, isUpdate);
/* Post creation hook for new operator */
InvokeObjectPostCreateHook(OperatorRelationId, operatorObjectId, 0);
table_close(pg_operator_desc, RowExclusiveLock);
/*
* If a commutator and/or negator link is provided, update the other
* operator(s) to point at this one, if they don't already have a link.
* This supports an alternative style of operator definition wherein the
* user first defines one operator without giving negator or commutator,
* then defines the other operator of the pair with the proper commutator
* or negator attribute. That style doesn't require creation of a shell,
* and it's the only style that worked right before Postgres version 6.5.
* This code also takes care of the situation where the new operator is
* its own commutator.
*/
if (selfCommutator)
commutatorId = operatorObjectId;
if (OidIsValid(commutatorId) || OidIsValid(negatorId))
OperatorUpd(operatorObjectId, commutatorId, negatorId, false);
return address;
}
/*
* Try to lookup another operator (commutator, etc)
*
* If not found, check to see if it is exactly the operator we are trying
* to define; if so, return InvalidOid. (Note that this case is only
* sensible for a commutator, so we error out otherwise.) If it is not
* the same operator, create a shell operator.
*/
static Oid
get_other_operator(List *otherOp, Oid otherLeftTypeId, Oid otherRightTypeId,
const char *operatorName, Oid operatorNamespace,
Oid leftTypeId, Oid rightTypeId, bool isCommutator)
{
Oid other_oid;
bool otherDefined;
char *otherName;
Oid otherNamespace;
AclResult aclresult;
other_oid = OperatorLookup(otherOp,
otherLeftTypeId,
otherRightTypeId,
&otherDefined);
if (OidIsValid(other_oid))
{
/* other op already in catalogs */
return other_oid;
}
otherNamespace = QualifiedNameGetCreationNamespace(otherOp,
&otherName);
if (strcmp(otherName, operatorName) == 0 &&
otherNamespace == operatorNamespace &&
otherLeftTypeId == leftTypeId &&
otherRightTypeId == rightTypeId)
{
/*
* self-linkage to this operator; caller will fix later. Note that
* only self-linkage for commutation makes sense.
*/
if (!isCommutator)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("operator cannot be its own negator or sort operator")));
return InvalidOid;
}
/* not in catalogs, different from operator, so make shell */
aclresult = pg_namespace_aclcheck(otherNamespace, GetUserId(),
ACL_CREATE);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, OBJECT_SCHEMA,
get_namespace_name(otherNamespace));
other_oid = OperatorShellMake(otherName,
otherNamespace,
otherLeftTypeId,
otherRightTypeId);
return other_oid;
}
/*
* OperatorUpd
*
* For a given operator, look up its negator and commutator operators.
* When isDelete is false, update their negator and commutator fields to
* point back to the given operator; when isDelete is true, update those
* fields to no longer point back to the given operator.
*
* The !isDelete case solves a problem for users who need to insert two new
* operators that are the negator or commutator of each other, while the
* isDelete case is needed so as not to leave dangling OID links behind
* after dropping an operator.
*/
void
OperatorUpd(Oid baseId, Oid commId, Oid negId, bool isDelete)
{
Relation pg_operator_desc;
HeapTuple tup;
/*
* If we're making an operator into its own commutator, then we need a
* command-counter increment here, since we've just inserted the tuple
* we're about to update. But when we're dropping an operator, we can
* skip this because we're at the beginning of the command.
*/
if (!isDelete)
CommandCounterIncrement();
/* Open the relation. */
pg_operator_desc = table_open(OperatorRelationId, RowExclusiveLock);
/* Get a writable copy of the commutator's tuple. */
if (OidIsValid(commId))
tup = SearchSysCacheCopy1(OPEROID, ObjectIdGetDatum(commId));
else
tup = NULL;
/* Update the commutator's tuple if need be. */
if (HeapTupleIsValid(tup))
{
Form_pg_operator t = (Form_pg_operator) GETSTRUCT(tup);
bool update_commutator = false;
/*
* Out of due caution, we only change the commutator's oprcom field if
* it has the exact value we expected: InvalidOid when creating an
* operator, or baseId when dropping one.
*/
if (isDelete && t->oprcom == baseId)
{
t->oprcom = InvalidOid;
update_commutator = true;
}
else if (!isDelete && !OidIsValid(t->oprcom))
{
t->oprcom = baseId;
update_commutator = true;
}
/* If any columns were found to need modification, update tuple. */
if (update_commutator)
{
CatalogTupleUpdate(pg_operator_desc, &tup->t_self, tup);
/*
* Do CCI to make the updated tuple visible. We must do this in
* case the commutator is also the negator. (Which would be a
* logic error on the operator definer's part, but that's not a
* good reason to fail here.) We would need a CCI anyway in the
* deletion case for a self-commutator with no negator.
*/
CommandCounterIncrement();
}
}
/*
* Similarly find and update the negator, if any.
*/
if (OidIsValid(negId))
tup = SearchSysCacheCopy1(OPEROID, ObjectIdGetDatum(negId));
else
tup = NULL;
if (HeapTupleIsValid(tup))
{
Form_pg_operator t = (Form_pg_operator) GETSTRUCT(tup);
bool update_negator = false;
/*
* Out of due caution, we only change the negator's oprnegate field if
* it has the exact value we expected: InvalidOid when creating an
* operator, or baseId when dropping one.
*/
if (isDelete && t->oprnegate == baseId)
{
t->oprnegate = InvalidOid;
update_negator = true;
}
else if (!isDelete && !OidIsValid(t->oprnegate))
{
t->oprnegate = baseId;
update_negator = true;
}
/* If any columns were found to need modification, update tuple. */
if (update_negator)
{
CatalogTupleUpdate(pg_operator_desc, &tup->t_self, tup);
/*
* In the deletion case, do CCI to make the updated tuple visible.
* We must do this in case the operator is its own negator. (Which
* would be a logic error on the operator definer's part, but
* that's not a good reason to fail here.)
*/
if (isDelete)
CommandCounterIncrement();
}
}
/* Close relation and release catalog lock. */
table_close(pg_operator_desc, RowExclusiveLock);
}
/*
* Create dependencies for an operator (either a freshly inserted
* complete operator, a new shell operator, a just-updated shell,
* or an operator that's being modified by ALTER OPERATOR).
*
* NB: the OidIsValid tests in this routine are necessary, in case
* the given operator is a shell.
*/
ObjectAddress
makeOperatorDependencies(HeapTuple tuple, bool isUpdate)
{
Form_pg_operator oper = (Form_pg_operator) GETSTRUCT(tuple);
ObjectAddress myself,
referenced;
myself.classId = OperatorRelationId;
myself.objectId = oper->oid;
myself.objectSubId = 0;
/*
* If we are updating the operator, delete any existing entries, except
* for extension membership which should remain the same.
*/
if (isUpdate)
{
deleteDependencyRecordsFor(myself.classId, myself.objectId, true);
deleteSharedDependencyRecordsFor(myself.classId, myself.objectId, 0);
}
/* Dependency on namespace */
if (OidIsValid(oper->oprnamespace))
{
referenced.classId = NamespaceRelationId;
referenced.objectId = oper->oprnamespace;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Dependency on left type */
if (OidIsValid(oper->oprleft))
{
referenced.classId = TypeRelationId;
referenced.objectId = oper->oprleft;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Dependency on right type */
if (OidIsValid(oper->oprright))
{
referenced.classId = TypeRelationId;
referenced.objectId = oper->oprright;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Dependency on result type */
if (OidIsValid(oper->oprresult))
{
referenced.classId = TypeRelationId;
referenced.objectId = oper->oprresult;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/*
* NOTE: we do not consider the operator to depend on the associated
* operators oprcom and oprnegate. We would not want to delete this
* operator if those go away, but only reset the link fields; which is not
* a function that the dependency code can presently handle. (Something
* could perhaps be done with objectSubId though.) For now, it's okay to
* let those links dangle if a referenced operator is removed.
*/
/* Dependency on implementation function */
if (OidIsValid(oper->oprcode))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = oper->oprcode;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Dependency on restriction selectivity function */
if (OidIsValid(oper->oprrest))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = oper->oprrest;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Dependency on join selectivity function */
if (OidIsValid(oper->oprjoin))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = oper->oprjoin;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Dependency on owner */
recordDependencyOnOwner(OperatorRelationId, oper->oid,
oper->oprowner);
/* Dependency on extension */
recordDependencyOnCurrentExtension(&myself, true);
return myself;
}
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