예제 #1
0
static PyObj
tupd_richcompare(PyObj self, PyObj ob, int op)
{
	TupleDesc pri, sec;

	if (!PyPgTupleDesc_Check(ob) || op != Py_EQ)
		return(Py_NotImplemented);

	pri = PyPgTupleDesc_GetTupleDesc(self);
	sec = PyPgTupleDesc_GetTupleDesc(ob);

	if (equalTupleDescs(pri, sec))
	{
		Py_INCREF(Py_True);
		return(Py_True);
	}

	Py_INCREF(Py_False);
	return(Py_False);
}
예제 #2
0
파일: pg_proc.c 프로젝트: eubide/postgres
/* ----------------------------------------------------------------
 *		ProcedureCreate
 *
 * Note: allParameterTypes, parameterModes, parameterNames, trftypes, and proconfig
 * are either arrays of the proper types or NULL.  We declare them Datum,
 * not "ArrayType *", to avoid importing array.h into pg_proc.h.
 * ----------------------------------------------------------------
 */
ObjectAddress
ProcedureCreate(const char *procedureName,
				Oid procNamespace,
				bool replace,
				bool returnsSet,
				Oid returnType,
				Oid proowner,
				Oid languageObjectId,
				Oid languageValidator,
				const char *prosrc,
				const char *probin,
				char prokind,
				bool security_definer,
				bool isLeakProof,
				bool isStrict,
				char volatility,
				char parallel,
				oidvector *parameterTypes,
				Datum allParameterTypes,
				Datum parameterModes,
				Datum parameterNames,
				List *parameterDefaults,
				Datum trftypes,
				Datum proconfig,
				float4 procost,
				float4 prorows)
{
	Oid			retval;
	int			parameterCount;
	int			allParamCount;
	Oid		   *allParams;
	char	   *paramModes = NULL;
	bool		genericInParam = false;
	bool		genericOutParam = false;
	bool		anyrangeInParam = false;
	bool		anyrangeOutParam = false;
	bool		internalInParam = false;
	bool		internalOutParam = false;
	Oid			variadicType = InvalidOid;
	Acl		   *proacl = NULL;
	Relation	rel;
	HeapTuple	tup;
	HeapTuple	oldtup;
	bool		nulls[Natts_pg_proc];
	Datum		values[Natts_pg_proc];
	bool		replaces[Natts_pg_proc];
	NameData	procname;
	TupleDesc	tupDesc;
	bool		is_update;
	ObjectAddress myself,
				referenced;
	int			i;
	Oid			trfid;

	/*
	 * sanity checks
	 */
	Assert(PointerIsValid(prosrc));

	parameterCount = parameterTypes->dim1;
	if (parameterCount < 0 || parameterCount > FUNC_MAX_ARGS)
		ereport(ERROR,
				(errcode(ERRCODE_TOO_MANY_ARGUMENTS),
				 errmsg_plural("functions cannot have more than %d argument",
							   "functions cannot have more than %d arguments",
							   FUNC_MAX_ARGS,
							   FUNC_MAX_ARGS)));
	/* note: the above is correct, we do NOT count output arguments */

	/* Deconstruct array inputs */
	if (allParameterTypes != PointerGetDatum(NULL))
	{
		/*
		 * We expect the array to be a 1-D OID array; verify that. We don't
		 * need to use deconstruct_array() since the array data is just going
		 * to look like a C array of OID values.
		 */
		ArrayType  *allParamArray = (ArrayType *) DatumGetPointer(allParameterTypes);

		allParamCount = ARR_DIMS(allParamArray)[0];
		if (ARR_NDIM(allParamArray) != 1 ||
			allParamCount <= 0 ||
			ARR_HASNULL(allParamArray) ||
			ARR_ELEMTYPE(allParamArray) != OIDOID)
			elog(ERROR, "allParameterTypes is not a 1-D Oid array");
		allParams = (Oid *) ARR_DATA_PTR(allParamArray);
		Assert(allParamCount >= parameterCount);
		/* we assume caller got the contents right */
	}
	else
	{
		allParamCount = parameterCount;
		allParams = parameterTypes->values;
	}

	if (parameterModes != PointerGetDatum(NULL))
	{
		/*
		 * We expect the array to be a 1-D CHAR array; verify that. We don't
		 * need to use deconstruct_array() since the array data is just going
		 * to look like a C array of char values.
		 */
		ArrayType  *modesArray = (ArrayType *) DatumGetPointer(parameterModes);

		if (ARR_NDIM(modesArray) != 1 ||
			ARR_DIMS(modesArray)[0] != allParamCount ||
			ARR_HASNULL(modesArray) ||
			ARR_ELEMTYPE(modesArray) != CHAROID)
			elog(ERROR, "parameterModes is not a 1-D char array");
		paramModes = (char *) ARR_DATA_PTR(modesArray);
	}

	/*
	 * Detect whether we have polymorphic or INTERNAL arguments.  The first
	 * loop checks input arguments, the second output arguments.
	 */
	for (i = 0; i < parameterCount; i++)
	{
		switch (parameterTypes->values[i])
		{
			case ANYARRAYOID:
			case ANYELEMENTOID:
			case ANYNONARRAYOID:
			case ANYENUMOID:
				genericInParam = true;
				break;
			case ANYRANGEOID:
				genericInParam = true;
				anyrangeInParam = true;
				break;
			case INTERNALOID:
				internalInParam = true;
				break;
		}
	}

	if (allParameterTypes != PointerGetDatum(NULL))
	{
		for (i = 0; i < allParamCount; i++)
		{
			if (paramModes == NULL ||
				paramModes[i] == PROARGMODE_IN ||
				paramModes[i] == PROARGMODE_VARIADIC)
				continue;		/* ignore input-only params */

			switch (allParams[i])
			{
				case ANYARRAYOID:
				case ANYELEMENTOID:
				case ANYNONARRAYOID:
				case ANYENUMOID:
					genericOutParam = true;
					break;
				case ANYRANGEOID:
					genericOutParam = true;
					anyrangeOutParam = true;
					break;
				case INTERNALOID:
					internalOutParam = true;
					break;
			}
		}
	}

	/*
	 * Do not allow polymorphic return type unless at least one input argument
	 * is polymorphic.  ANYRANGE return type is even stricter: must have an
	 * ANYRANGE input (since we can't deduce the specific range type from
	 * ANYELEMENT).  Also, do not allow return type INTERNAL unless at least
	 * one input argument is INTERNAL.
	 */
	if ((IsPolymorphicType(returnType) || genericOutParam)
		&& !genericInParam)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
				 errmsg("cannot determine result data type"),
				 errdetail("A function returning a polymorphic type must have at least one polymorphic argument.")));

	if ((returnType == ANYRANGEOID || anyrangeOutParam) &&
		!anyrangeInParam)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
				 errmsg("cannot determine result data type"),
				 errdetail("A function returning \"anyrange\" must have at least one \"anyrange\" argument.")));

	if ((returnType == INTERNALOID || internalOutParam) && !internalInParam)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
				 errmsg("unsafe use of pseudo-type \"internal\""),
				 errdetail("A function returning \"internal\" must have at least one \"internal\" argument.")));

	if (paramModes != NULL)
	{
		/*
		 * Only the last input parameter can be variadic; if it is, save its
		 * element type.  Errors here are just elog since caller should have
		 * checked this already.
		 */
		for (i = 0; i < allParamCount; i++)
		{
			switch (paramModes[i])
			{
				case PROARGMODE_IN:
				case PROARGMODE_INOUT:
					if (OidIsValid(variadicType))
						elog(ERROR, "variadic parameter must be last");
					break;
				case PROARGMODE_OUT:
				case PROARGMODE_TABLE:
					/* okay */
					break;
				case PROARGMODE_VARIADIC:
					if (OidIsValid(variadicType))
						elog(ERROR, "variadic parameter must be last");
					switch (allParams[i])
					{
						case ANYOID:
							variadicType = ANYOID;
							break;
						case ANYARRAYOID:
							variadicType = ANYELEMENTOID;
							break;
						default:
							variadicType = get_element_type(allParams[i]);
							if (!OidIsValid(variadicType))
								elog(ERROR, "variadic parameter is not an array");
							break;
					}
					break;
				default:
					elog(ERROR, "invalid parameter mode '%c'", paramModes[i]);
					break;
			}
		}
	}

	/*
	 * All seems OK; prepare the data to be inserted into pg_proc.
	 */

	for (i = 0; i < Natts_pg_proc; ++i)
	{
		nulls[i] = false;
		values[i] = (Datum) 0;
		replaces[i] = true;
	}

	namestrcpy(&procname, procedureName);
	values[Anum_pg_proc_proname - 1] = NameGetDatum(&procname);
	values[Anum_pg_proc_pronamespace - 1] = ObjectIdGetDatum(procNamespace);
	values[Anum_pg_proc_proowner - 1] = ObjectIdGetDatum(proowner);
	values[Anum_pg_proc_prolang - 1] = ObjectIdGetDatum(languageObjectId);
	values[Anum_pg_proc_procost - 1] = Float4GetDatum(procost);
	values[Anum_pg_proc_prorows - 1] = Float4GetDatum(prorows);
	values[Anum_pg_proc_provariadic - 1] = ObjectIdGetDatum(variadicType);
	values[Anum_pg_proc_protransform - 1] = ObjectIdGetDatum(InvalidOid);
	values[Anum_pg_proc_prokind - 1] = CharGetDatum(prokind);
	values[Anum_pg_proc_prosecdef - 1] = BoolGetDatum(security_definer);
	values[Anum_pg_proc_proleakproof - 1] = BoolGetDatum(isLeakProof);
	values[Anum_pg_proc_proisstrict - 1] = BoolGetDatum(isStrict);
	values[Anum_pg_proc_proretset - 1] = BoolGetDatum(returnsSet);
	values[Anum_pg_proc_provolatile - 1] = CharGetDatum(volatility);
	values[Anum_pg_proc_proparallel - 1] = CharGetDatum(parallel);
	values[Anum_pg_proc_pronargs - 1] = UInt16GetDatum(parameterCount);
	values[Anum_pg_proc_pronargdefaults - 1] = UInt16GetDatum(list_length(parameterDefaults));
	values[Anum_pg_proc_prorettype - 1] = ObjectIdGetDatum(returnType);
	values[Anum_pg_proc_proargtypes - 1] = PointerGetDatum(parameterTypes);
	if (allParameterTypes != PointerGetDatum(NULL))
		values[Anum_pg_proc_proallargtypes - 1] = allParameterTypes;
	else
		nulls[Anum_pg_proc_proallargtypes - 1] = true;
	if (parameterModes != PointerGetDatum(NULL))
		values[Anum_pg_proc_proargmodes - 1] = parameterModes;
	else
		nulls[Anum_pg_proc_proargmodes - 1] = true;
	if (parameterNames != PointerGetDatum(NULL))
		values[Anum_pg_proc_proargnames - 1] = parameterNames;
	else
		nulls[Anum_pg_proc_proargnames - 1] = true;
	if (parameterDefaults != NIL)
		values[Anum_pg_proc_proargdefaults - 1] = CStringGetTextDatum(nodeToString(parameterDefaults));
	else
		nulls[Anum_pg_proc_proargdefaults - 1] = true;
	if (trftypes != PointerGetDatum(NULL))
		values[Anum_pg_proc_protrftypes - 1] = trftypes;
	else
		nulls[Anum_pg_proc_protrftypes - 1] = true;
	values[Anum_pg_proc_prosrc - 1] = CStringGetTextDatum(prosrc);
	if (probin)
		values[Anum_pg_proc_probin - 1] = CStringGetTextDatum(probin);
	else
		nulls[Anum_pg_proc_probin - 1] = true;
	if (proconfig != PointerGetDatum(NULL))
		values[Anum_pg_proc_proconfig - 1] = proconfig;
	else
		nulls[Anum_pg_proc_proconfig - 1] = true;
	/* proacl will be determined later */

	rel = table_open(ProcedureRelationId, RowExclusiveLock);
	tupDesc = RelationGetDescr(rel);

	/* Check for pre-existing definition */
	oldtup = SearchSysCache3(PROCNAMEARGSNSP,
							 PointerGetDatum(procedureName),
							 PointerGetDatum(parameterTypes),
							 ObjectIdGetDatum(procNamespace));

	if (HeapTupleIsValid(oldtup))
	{
		/* There is one; okay to replace it? */
		Form_pg_proc oldproc = (Form_pg_proc) GETSTRUCT(oldtup);
		Datum		proargnames;
		bool		isnull;
		const char *dropcmd;

		if (!replace)
			ereport(ERROR,
					(errcode(ERRCODE_DUPLICATE_FUNCTION),
					 errmsg("function \"%s\" already exists with same argument types",
							procedureName)));
		if (!pg_proc_ownercheck(oldproc->oid, proowner))
			aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_FUNCTION,
						   procedureName);

		/* Not okay to change routine kind */
		if (oldproc->prokind != prokind)
			ereport(ERROR,
					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
					 errmsg("cannot change routine kind"),
					 (oldproc->prokind == PROKIND_AGGREGATE ?
					  errdetail("\"%s\" is an aggregate function.", procedureName) :
					  oldproc->prokind == PROKIND_FUNCTION ?
					  errdetail("\"%s\" is a function.", procedureName) :
					  oldproc->prokind == PROKIND_PROCEDURE ?
					  errdetail("\"%s\" is a procedure.", procedureName) :
					  oldproc->prokind == PROKIND_WINDOW ?
					  errdetail("\"%s\" is a window function.", procedureName) :
					  0)));

		dropcmd = (prokind == PROKIND_PROCEDURE ? "DROP PROCEDURE" : "DROP FUNCTION");

		/*
		 * Not okay to change the return type of the existing proc, since
		 * existing rules, views, etc may depend on the return type.
		 *
		 * In case of a procedure, a changing return type means that whether
		 * the procedure has output parameters was changed.  Since there is no
		 * user visible return type, we produce a more specific error message.
		 */
		if (returnType != oldproc->prorettype ||
			returnsSet != oldproc->proretset)
			ereport(ERROR,
					(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
					 prokind == PROKIND_PROCEDURE
					 ? errmsg("cannot change whether a procedure has output parameters")
					 : errmsg("cannot change return type of existing function"),
					 /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
					 errhint("Use %s %s first.",
							 dropcmd,
							 format_procedure(oldproc->oid))));

		/*
		 * If it returns RECORD, check for possible change of record type
		 * implied by OUT parameters
		 */
		if (returnType == RECORDOID)
		{
			TupleDesc	olddesc;
			TupleDesc	newdesc;

			olddesc = build_function_result_tupdesc_t(oldtup);
			newdesc = build_function_result_tupdesc_d(prokind,
													  allParameterTypes,
													  parameterModes,
													  parameterNames);
			if (olddesc == NULL && newdesc == NULL)
				 /* ok, both are runtime-defined RECORDs */ ;
			else if (olddesc == NULL || newdesc == NULL ||
					 !equalTupleDescs(olddesc, newdesc))
				ereport(ERROR,
						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
						 errmsg("cannot change return type of existing function"),
						 errdetail("Row type defined by OUT parameters is different."),
						 /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
						 errhint("Use %s %s first.",
								 dropcmd,
								 format_procedure(oldproc->oid))));
		}

		/*
		 * If there were any named input parameters, check to make sure the
		 * names have not been changed, as this could break existing calls. We
		 * allow adding names to formerly unnamed parameters, though.
		 */
		proargnames = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
									  Anum_pg_proc_proargnames,
									  &isnull);
		if (!isnull)
		{
			Datum		proargmodes;
			char	  **old_arg_names;
			char	  **new_arg_names;
			int			n_old_arg_names;
			int			n_new_arg_names;
			int			j;

			proargmodes = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
										  Anum_pg_proc_proargmodes,
										  &isnull);
			if (isnull)
				proargmodes = PointerGetDatum(NULL);	/* just to be sure */

			n_old_arg_names = get_func_input_arg_names(proargnames,
													   proargmodes,
													   &old_arg_names);
			n_new_arg_names = get_func_input_arg_names(parameterNames,
													   parameterModes,
													   &new_arg_names);
			for (j = 0; j < n_old_arg_names; j++)
			{
				if (old_arg_names[j] == NULL)
					continue;
				if (j >= n_new_arg_names || new_arg_names[j] == NULL ||
					strcmp(old_arg_names[j], new_arg_names[j]) != 0)
					ereport(ERROR,
							(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
							 errmsg("cannot change name of input parameter \"%s\"",
									old_arg_names[j]),
							 /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
							 errhint("Use %s %s first.",
									 dropcmd,
									 format_procedure(oldproc->oid))));
			}
		}

		/*
		 * If there are existing defaults, check compatibility: redefinition
		 * must not remove any defaults nor change their types.  (Removing a
		 * default might cause a function to fail to satisfy an existing call.
		 * Changing type would only be possible if the associated parameter is
		 * polymorphic, and in such cases a change of default type might alter
		 * the resolved output type of existing calls.)
		 */
		if (oldproc->pronargdefaults != 0)
		{
			Datum		proargdefaults;
			List	   *oldDefaults;
			ListCell   *oldlc;
			ListCell   *newlc;

			if (list_length(parameterDefaults) < oldproc->pronargdefaults)
				ereport(ERROR,
						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
						 errmsg("cannot remove parameter defaults from existing function"),
						 /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
						 errhint("Use %s %s first.",
								 dropcmd,
								 format_procedure(oldproc->oid))));

			proargdefaults = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
											 Anum_pg_proc_proargdefaults,
											 &isnull);
			Assert(!isnull);
			oldDefaults = castNode(List, stringToNode(TextDatumGetCString(proargdefaults)));
			Assert(list_length(oldDefaults) == oldproc->pronargdefaults);

			/* new list can have more defaults than old, advance over 'em */
			newlc = list_head(parameterDefaults);
			for (i = list_length(parameterDefaults) - oldproc->pronargdefaults;
				 i > 0;
				 i--)
				newlc = lnext(newlc);

			foreach(oldlc, oldDefaults)
			{
				Node	   *oldDef = (Node *) lfirst(oldlc);
				Node	   *newDef = (Node *) lfirst(newlc);

				if (exprType(oldDef) != exprType(newDef))
					ereport(ERROR,
							(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
							 errmsg("cannot change data type of existing parameter default value"),
							 /* translator: first %s is DROP FUNCTION or DROP PROCEDURE */
							 errhint("Use %s %s first.",
									 dropcmd,
									 format_procedure(oldproc->oid))));
				newlc = lnext(newlc);
			}
		}
예제 #3
0
/* ----------------------------------------------------------------
 *		ProcedureCreate
 *
 * Note: allParameterTypes, parameterModes, parameterNames are either arrays
 * of the proper types or NULL.  We declare them Datum, not "ArrayType *",
 * to avoid importing array.h into pg_proc.h.
 * ----------------------------------------------------------------
 */
Oid
ProcedureCreate(const char *procedureName,
				Oid procNamespace,
				bool replace,
				bool returnsSet,
				Oid returnType,
				Oid languageObjectId,
				Oid languageValidator,
				const char *prosrc,
				const char *probin,
				bool isAgg,
				bool security_definer,
				bool isStrict,
				char volatility,
				oidvector *parameterTypes,
				Datum allParameterTypes,
				Datum parameterModes,
				Datum parameterNames)
{
	Oid			retval;
	int			parameterCount;
	int			allParamCount;
	Oid		   *allParams;
	bool		genericInParam = false;
	bool		genericOutParam = false;
	bool		internalInParam = false;
	bool		internalOutParam = false;
	Relation	rel;
	HeapTuple	tup;
	HeapTuple	oldtup;
	char		nulls[Natts_pg_proc];
	Datum		values[Natts_pg_proc];
	char		replaces[Natts_pg_proc];
	Oid			relid;
	NameData	procname;
	TupleDesc	tupDesc;
	bool		is_update;
	ObjectAddress myself,
				referenced;
	int			i;

	/*
	 * sanity checks
	 */
	Assert(PointerIsValid(prosrc));
	Assert(PointerIsValid(probin));

	parameterCount = parameterTypes->dim1;
	if (parameterCount < 0 || parameterCount > FUNC_MAX_ARGS)
		ereport(ERROR,
				(errcode(ERRCODE_TOO_MANY_ARGUMENTS),
				 errmsg("functions cannot have more than %d arguments",
						FUNC_MAX_ARGS)));
	/* note: the above is correct, we do NOT count output arguments */

	if (allParameterTypes != PointerGetDatum(NULL))
	{
		/*
		 * We expect the array to be a 1-D OID array; verify that. We don't
		 * need to use deconstruct_array() since the array data is just going
		 * to look like a C array of OID values.
		 */
		allParamCount = ARR_DIMS(DatumGetPointer(allParameterTypes))[0];
		if (ARR_NDIM(DatumGetPointer(allParameterTypes)) != 1 ||
			allParamCount <= 0 ||
			ARR_ELEMTYPE(DatumGetPointer(allParameterTypes)) != OIDOID)
			elog(ERROR, "allParameterTypes is not a 1-D Oid array");
		allParams = (Oid *) ARR_DATA_PTR(DatumGetPointer(allParameterTypes));
		Assert(allParamCount >= parameterCount);
		/* we assume caller got the contents right */
	}
	else
	{
		allParamCount = parameterCount;
		allParams = parameterTypes->values;
	}

	/*
	 * Do not allow return type ANYARRAY or ANYELEMENT unless at least one
	 * input argument is ANYARRAY or ANYELEMENT.  Also, do not allow return
	 * type INTERNAL unless at least one input argument is INTERNAL.
	 */
	for (i = 0; i < parameterCount; i++)
	{
		switch (parameterTypes->values[i])
		{
			case ANYARRAYOID:
			case ANYELEMENTOID:
				genericInParam = true;
				break;
			case INTERNALOID:
				internalInParam = true;
				break;
		}
	}

	if (allParameterTypes != PointerGetDatum(NULL))
	{
		for (i = 0; i < allParamCount; i++)
		{
			/*
			 * We don't bother to distinguish input and output params here, so
			 * if there is, say, just an input INTERNAL param then we will
			 * still set internalOutParam.	This is OK since we don't really
			 * care.
			 */
			switch (allParams[i])
			{
				case ANYARRAYOID:
				case ANYELEMENTOID:
					genericOutParam = true;
					break;
				case INTERNALOID:
					internalOutParam = true;
					break;
			}
		}
	}

	if ((returnType == ANYARRAYOID || returnType == ANYELEMENTOID ||
		 genericOutParam) && !genericInParam)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
				 errmsg("cannot determine result data type"),
				 errdetail("A function returning \"anyarray\" or \"anyelement\" must have at least one argument of either type.")));

	if ((returnType == INTERNALOID || internalOutParam) && !internalInParam)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
				 errmsg("unsafe use of pseudo-type \"internal\""),
				 errdetail("A function returning \"internal\" must have at least one \"internal\" argument.")));

	/*
	 * don't allow functions of complex types that have the same name as
	 * existing attributes of the type
	 */
	if (parameterCount == 1 &&
		OidIsValid(parameterTypes->values[0]) &&
		(relid = typeidTypeRelid(parameterTypes->values[0])) != InvalidOid &&
		get_attnum(relid, procedureName) != InvalidAttrNumber)
		ereport(ERROR,
				(errcode(ERRCODE_DUPLICATE_COLUMN),
				 errmsg("\"%s\" is already an attribute of type %s",
						procedureName,
						format_type_be(parameterTypes->values[0]))));

	/*
	 * All seems OK; prepare the data to be inserted into pg_proc.
	 */

	for (i = 0; i < Natts_pg_proc; ++i)
	{
		nulls[i] = ' ';
		values[i] = (Datum) 0;
		replaces[i] = 'r';
	}

	namestrcpy(&procname, procedureName);
	values[Anum_pg_proc_proname - 1] = NameGetDatum(&procname);
	values[Anum_pg_proc_pronamespace - 1] = ObjectIdGetDatum(procNamespace);
	values[Anum_pg_proc_proowner - 1] = ObjectIdGetDatum(GetUserId());
	values[Anum_pg_proc_prolang - 1] = ObjectIdGetDatum(languageObjectId);
	values[Anum_pg_proc_proisagg - 1] = BoolGetDatum(isAgg);
	values[Anum_pg_proc_prosecdef - 1] = BoolGetDatum(security_definer);
	values[Anum_pg_proc_proisstrict - 1] = BoolGetDatum(isStrict);
	values[Anum_pg_proc_proretset - 1] = BoolGetDatum(returnsSet);
	values[Anum_pg_proc_provolatile - 1] = CharGetDatum(volatility);
	values[Anum_pg_proc_pronargs - 1] = UInt16GetDatum(parameterCount);
	values[Anum_pg_proc_prorettype - 1] = ObjectIdGetDatum(returnType);
	values[Anum_pg_proc_proargtypes - 1] = PointerGetDatum(parameterTypes);
	if (allParameterTypes != PointerGetDatum(NULL))
		values[Anum_pg_proc_proallargtypes - 1] = allParameterTypes;
	else
		nulls[Anum_pg_proc_proallargtypes - 1] = 'n';
	if (parameterModes != PointerGetDatum(NULL))
		values[Anum_pg_proc_proargmodes - 1] = parameterModes;
	else
		nulls[Anum_pg_proc_proargmodes - 1] = 'n';
	if (parameterNames != PointerGetDatum(NULL))
		values[Anum_pg_proc_proargnames - 1] = parameterNames;
	else
		nulls[Anum_pg_proc_proargnames - 1] = 'n';
	values[Anum_pg_proc_prosrc - 1] = DirectFunctionCall1(textin,
													CStringGetDatum(prosrc));
	values[Anum_pg_proc_probin - 1] = DirectFunctionCall1(textin,
													CStringGetDatum(probin));
	/* start out with empty permissions */
	nulls[Anum_pg_proc_proacl - 1] = 'n';

	rel = heap_open(ProcedureRelationId, RowExclusiveLock);
	tupDesc = RelationGetDescr(rel);

	/* Check for pre-existing definition */
	oldtup = SearchSysCache(PROCNAMEARGSNSP,
							PointerGetDatum(procedureName),
							PointerGetDatum(parameterTypes),
							ObjectIdGetDatum(procNamespace),
							0);

	if (HeapTupleIsValid(oldtup))
	{
		/* There is one; okay to replace it? */
		Form_pg_proc oldproc = (Form_pg_proc) GETSTRUCT(oldtup);

		if (!replace)
			ereport(ERROR,
					(errcode(ERRCODE_DUPLICATE_FUNCTION),
			errmsg("function \"%s\" already exists with same argument types",
				   procedureName)));
		if (!pg_proc_ownercheck(HeapTupleGetOid(oldtup), GetUserId()))
			aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_PROC,
						   procedureName);

		/*
		 * Not okay to change the return type of the existing proc, since
		 * existing rules, views, etc may depend on the return type.
		 */
		if (returnType != oldproc->prorettype ||
			returnsSet != oldproc->proretset)
			ereport(ERROR,
					(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
					 errmsg("cannot change return type of existing function"),
					 errhint("Use DROP FUNCTION first.")));

		/*
		 * If it returns RECORD, check for possible change of record type
		 * implied by OUT parameters
		 */
		if (returnType == RECORDOID)
		{
			TupleDesc	olddesc;
			TupleDesc	newdesc;

			olddesc = build_function_result_tupdesc_t(oldtup);
			newdesc = build_function_result_tupdesc_d(allParameterTypes,
													  parameterModes,
													  parameterNames);
			if (olddesc == NULL && newdesc == NULL)
				 /* ok, both are runtime-defined RECORDs */ ;
			else if (olddesc == NULL || newdesc == NULL ||
					 !equalTupleDescs(olddesc, newdesc))
				ereport(ERROR,
						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
					errmsg("cannot change return type of existing function"),
				errdetail("Row type defined by OUT parameters is different."),
						 errhint("Use DROP FUNCTION first.")));
		}

		/* Can't change aggregate status, either */
		if (oldproc->proisagg != isAgg)
		{
			if (oldproc->proisagg)
				ereport(ERROR,
						(errcode(ERRCODE_WRONG_OBJECT_TYPE),
						 errmsg("function \"%s\" is an aggregate",
								procedureName)));
			else
				ereport(ERROR,
						(errcode(ERRCODE_WRONG_OBJECT_TYPE),
						 errmsg("function \"%s\" is not an aggregate",
								procedureName)));
		}

		/* do not change existing ownership or permissions, either */
		replaces[Anum_pg_proc_proowner - 1] = ' ';
		replaces[Anum_pg_proc_proacl - 1] = ' ';

		/* Okay, do it... */
		tup = heap_modifytuple(oldtup, tupDesc, values, nulls, replaces);
		simple_heap_update(rel, &tup->t_self, tup);

		ReleaseSysCache(oldtup);
		is_update = true;
	}
	else
	{
		/* Creating a new procedure */
		tup = heap_formtuple(tupDesc, values, nulls);
		simple_heap_insert(rel, tup);
		is_update = false;
	}

	/* Need to update indexes for either the insert or update case */
	CatalogUpdateIndexes(rel, tup);

	retval = HeapTupleGetOid(tup);

	/*
	 * Create dependencies for the new function.  If we are updating an
	 * existing function, first delete any existing pg_depend entries.
	 */
	if (is_update)
	{
		deleteDependencyRecordsFor(ProcedureRelationId, retval);
		deleteSharedDependencyRecordsFor(ProcedureRelationId, retval);
	}

	myself.classId = ProcedureRelationId;
	myself.objectId = retval;
	myself.objectSubId = 0;

	/* dependency on namespace */
	referenced.classId = NamespaceRelationId;
	referenced.objectId = procNamespace;
	referenced.objectSubId = 0;
	recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);

	/* dependency on implementation language */
	referenced.classId = LanguageRelationId;
	referenced.objectId = languageObjectId;
	referenced.objectSubId = 0;
	recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);

	/* dependency on return type */
	referenced.classId = TypeRelationId;
	referenced.objectId = returnType;
	referenced.objectSubId = 0;
	recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);

	/* dependency on parameter types */
	for (i = 0; i < allParamCount; i++)
	{
		referenced.classId = TypeRelationId;
		referenced.objectId = allParams[i];
		referenced.objectSubId = 0;
		recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
	}

	/* dependency on owner */
	recordDependencyOnOwner(ProcedureRelationId, retval, GetUserId());

	heap_freetuple(tup);

	heap_close(rel, RowExclusiveLock);

	/* Verify function body */
	if (OidIsValid(languageValidator))
	{
		/* Advance command counter so new tuple can be seen by validator */
		CommandCounterIncrement();
		OidFunctionCall1(languageValidator, ObjectIdGetDatum(retval));
	}

	return retval;
}
예제 #4
0
/*
 * Use the supplied ResultRelInfo to create an appropriately restructured
 * version of the tuple in the supplied slot, if necessary.
 *
 * slot -- slot containing the input tuple
 * resultRelInfo -- info pertaining to the target part of an insert
 *
 * If no restructuring is required, the result is the argument slot, else
 * it is the slot from the argument result info updated to hold the
 * restructured tuple.
 */
TupleTableSlot *
reconstructMatchingTupleSlot(TupleTableSlot *slot, ResultRelInfo *resultRelInfo)
{
	int natts;
	Datum *values;
	bool *isnull;
	AttrMap *map;
	TupleTableSlot *partslot;
	Datum *partvalues;
	bool *partisnull;

	map = resultRelInfo->ri_partInsertMap;

	TupleDesc inputTupDesc = slot->tts_tupleDescriptor;
	TupleDesc resultTupDesc = resultRelInfo->ri_RelationDesc->rd_att;
	bool tupleDescMatch = (resultRelInfo->tupdesc_match == 1);
	if (resultRelInfo->tupdesc_match == 0)
	{
		tupleDescMatch = equalTupleDescs(inputTupDesc, resultTupDesc, false);

		if (tupleDescMatch)
		{
			resultRelInfo->tupdesc_match = 1;
		}
		else
		{
			resultRelInfo->tupdesc_match = -1;
		}
	}

	/* No map and matching tuple descriptor means no restructuring needed. */
	if (map == NULL && tupleDescMatch)
		return slot;

	/* Put the given tuple into attribute arrays. */
	natts = slot->tts_tupleDescriptor->natts;
	slot_getallattrs(slot);
	values = slot_get_values(slot);
	isnull = slot_get_isnull(slot);

	/*
	 * Get the target slot ready. If this is a child partition table,
	 * set target slot to ri_partSlot. Otherwise, use ri_resultSlot.
	 */
	if (map != NULL)
	{
		Assert(resultRelInfo->ri_partSlot != NULL);
		partslot = resultRelInfo->ri_partSlot;
	}
	else
	{
		if (resultRelInfo->ri_resultSlot == NULL)
		{
			resultRelInfo->ri_resultSlot = MakeSingleTupleTableSlot(resultTupDesc);
		}

		partslot = resultRelInfo->ri_resultSlot;
	}

	partslot = ExecStoreAllNullTuple(partslot);
	partvalues = slot_get_values(partslot);
	partisnull = slot_get_isnull(partslot);

	/* Restructure the input tuple.  Non-zero map entries are attribute
	 * numbers in the target tuple, however, not every attribute
	 * number of the input tuple need be present.  In particular,
	 * attribute numbers corresponding to dropped attributes will be
	 * missing.
	 */
	reconstructTupleValues(map, values, isnull, natts,
						partvalues, partisnull, partslot->tts_tupleDescriptor->natts);
	partslot = ExecStoreVirtualTuple(partslot);

	return partslot;
}
예제 #5
0
/*
 * Search the relation 'rel' for tuple using the sequential scan.
 *
 * If a matching tuple is found, lock it with lockmode, fill the slot with its
 * contents, and return true.  Return false otherwise.
 *
 * Note that this stops on the first matching tuple.
 *
 * This can obviously be quite slow on tables that have more than few rows.
 */
bool
RelationFindReplTupleSeq(Relation rel, LockTupleMode lockmode,
						 TupleTableSlot *searchslot, TupleTableSlot *outslot)
{
	HeapTuple	scantuple;
	HeapScanDesc scan;
	SnapshotData snap;
	TransactionId xwait;
	bool		found;
	TupleDesc	desc = RelationGetDescr(rel);

	Assert(equalTupleDescs(desc, outslot->tts_tupleDescriptor));

	/* Start an index scan. */
	InitDirtySnapshot(snap);
	scan = heap_beginscan(rel, &snap, 0, NULL);

retry:
	found = false;

	heap_rescan(scan, NULL);

	/* Try to find the tuple */
	while ((scantuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
	{
		if (!tuple_equals_slot(desc, scantuple, searchslot))
			continue;

		found = true;
		ExecStoreTuple(scantuple, outslot, InvalidBuffer, false);
		ExecMaterializeSlot(outslot);

		xwait = TransactionIdIsValid(snap.xmin) ?
			snap.xmin : snap.xmax;

		/*
		 * If the tuple is locked, wait for locking transaction to finish and
		 * retry.
		 */
		if (TransactionIdIsValid(xwait))
		{
			XactLockTableWait(xwait, NULL, NULL, XLTW_None);
			goto retry;
		}
	}

	/* Found tuple, try to lock it in the lockmode. */
	if (found)
	{
		Buffer		buf;
		HeapUpdateFailureData hufd;
		HTSU_Result res;
		HeapTupleData locktup;

		ItemPointerCopy(&outslot->tts_tuple->t_self, &locktup.t_self);

		PushActiveSnapshot(GetLatestSnapshot());

		res = heap_lock_tuple(rel, &locktup, GetCurrentCommandId(false),
							  lockmode,
							  LockWaitBlock,
							  false /* don't follow updates */ ,
							  &buf, &hufd);
		/* the tuple slot already has the buffer pinned */
		ReleaseBuffer(buf);

		PopActiveSnapshot();

		switch (res)
		{
			case HeapTupleMayBeUpdated:
				break;
			case HeapTupleUpdated:
				/* XXX: Improve handling here */
				ereport(LOG,
						(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
						 errmsg("concurrent update, retrying")));
				goto retry;
			case HeapTupleInvisible:
				elog(ERROR, "attempted to lock invisible tuple");
			default:
				elog(ERROR, "unexpected heap_lock_tuple status: %u", res);
				break;
		}
	}

	heap_endscan(scan);

	return found;
}
예제 #6
0
/* ----------------------------------------------------------------
 *		ProcedureCreate
 *
 * Note: allParameterTypes, parameterModes, parameterNames, and proconfig
 * are either arrays of the proper types or NULL.  We declare them Datum,
 * not "ArrayType *", to avoid importing array.h into pg_proc_fn.h.
 * ----------------------------------------------------------------
 */
Oid
ProcedureCreate(const char *procedureName,
				Oid procNamespace,
				bool replace,
				bool returnsSet,
				Oid returnType,
				Oid languageObjectId,
				Oid languageValidator,
				const char *prosrc,
				const char *probin,
				bool isAgg,
				bool isWindowFunc,
				bool security_definer,
				bool isStrict,
				char volatility,
				oidvector *parameterTypes,
				Datum allParameterTypes,
				Datum parameterModes,
				Datum parameterNames,
				List *parameterDefaults,
				Datum proconfig,
				float4 procost,
				float4 prorows)
{
	Oid			retval;
	int			parameterCount;
	int			allParamCount;
	Oid		   *allParams;
	bool		genericInParam = false;
	bool		genericOutParam = false;
	bool		internalInParam = false;
	bool		internalOutParam = false;
	Oid			variadicType = InvalidOid;
	Oid			proowner = GetUserId();
	Relation	rel;
	HeapTuple	tup;
	HeapTuple	oldtup;
	bool		nulls[Natts_pg_proc];
	Datum		values[Natts_pg_proc];
	bool		replaces[Natts_pg_proc];
	Oid			relid;
	NameData	procname;
	TupleDesc	tupDesc;
	bool		is_update;
	ObjectAddress myself,
				referenced;
	int			i;

	/*
	 * sanity checks
	 */
	Assert(PointerIsValid(prosrc));

	parameterCount = parameterTypes->dim1;
	if (parameterCount < 0 || parameterCount > FUNC_MAX_ARGS)
		ereport(ERROR,
				(errcode(ERRCODE_TOO_MANY_ARGUMENTS),
				 errmsg_plural("functions cannot have more than %d argument",
							   "functions cannot have more than %d arguments",
							   FUNC_MAX_ARGS,
							   FUNC_MAX_ARGS)));
	/* note: the above is correct, we do NOT count output arguments */

	if (allParameterTypes != PointerGetDatum(NULL))
	{
		/*
		 * We expect the array to be a 1-D OID array; verify that. We don't
		 * need to use deconstruct_array() since the array data is just going
		 * to look like a C array of OID values.
		 */
		ArrayType  *allParamArray = (ArrayType *) DatumGetPointer(allParameterTypes);

		allParamCount = ARR_DIMS(allParamArray)[0];
		if (ARR_NDIM(allParamArray) != 1 ||
			allParamCount <= 0 ||
			ARR_HASNULL(allParamArray) ||
			ARR_ELEMTYPE(allParamArray) != OIDOID)
			elog(ERROR, "allParameterTypes is not a 1-D Oid array");
		allParams = (Oid *) ARR_DATA_PTR(allParamArray);
		Assert(allParamCount >= parameterCount);
		/* we assume caller got the contents right */
	}
	else
	{
		allParamCount = parameterCount;
		allParams = parameterTypes->values;
	}

	/*
	 * Do not allow polymorphic return type unless at least one input argument
	 * is polymorphic.	Also, do not allow return type INTERNAL unless at
	 * least one input argument is INTERNAL.
	 */
	for (i = 0; i < parameterCount; i++)
	{
		switch (parameterTypes->values[i])
		{
			case ANYARRAYOID:
			case ANYELEMENTOID:
			case ANYNONARRAYOID:
			case ANYENUMOID:
				genericInParam = true;
				break;
			case INTERNALOID:
				internalInParam = true;
				break;
		}
	}

	if (allParameterTypes != PointerGetDatum(NULL))
	{
		for (i = 0; i < allParamCount; i++)
		{
			/*
			 * We don't bother to distinguish input and output params here, so
			 * if there is, say, just an input INTERNAL param then we will
			 * still set internalOutParam.	This is OK since we don't really
			 * care.
			 */
			switch (allParams[i])
			{
				case ANYARRAYOID:
				case ANYELEMENTOID:
				case ANYNONARRAYOID:
				case ANYENUMOID:
					genericOutParam = true;
					break;
				case INTERNALOID:
					internalOutParam = true;
					break;
			}
		}
	}

	if ((IsPolymorphicType(returnType) || genericOutParam)
		&& !genericInParam)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
				 errmsg("cannot determine result data type"),
				 errdetail("A function returning a polymorphic type must have at least one polymorphic argument.")));

	if ((returnType == INTERNALOID || internalOutParam) && !internalInParam)
		ereport(ERROR,
				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
				 errmsg("unsafe use of pseudo-type \"internal\""),
				 errdetail("A function returning \"internal\" must have at least one \"internal\" argument.")));

	/*
	 * don't allow functions of complex types that have the same name as
	 * existing attributes of the type
	 */
	if (parameterCount == 1 &&
		OidIsValid(parameterTypes->values[0]) &&
		(relid = typeidTypeRelid(parameterTypes->values[0])) != InvalidOid &&
		get_attnum(relid, procedureName) != InvalidAttrNumber)
		ereport(ERROR,
				(errcode(ERRCODE_DUPLICATE_COLUMN),
				 errmsg("\"%s\" is already an attribute of type %s",
						procedureName,
						format_type_be(parameterTypes->values[0]))));

	if (parameterModes != PointerGetDatum(NULL))
	{
		/*
		 * We expect the array to be a 1-D CHAR array; verify that. We don't
		 * need to use deconstruct_array() since the array data is just going
		 * to look like a C array of char values.
		 */
		ArrayType  *modesArray = (ArrayType *) DatumGetPointer(parameterModes);
		char	   *modes;

		if (ARR_NDIM(modesArray) != 1 ||
			ARR_DIMS(modesArray)[0] != allParamCount ||
			ARR_HASNULL(modesArray) ||
			ARR_ELEMTYPE(modesArray) != CHAROID)
			elog(ERROR, "parameterModes is not a 1-D char array");
		modes = (char *) ARR_DATA_PTR(modesArray);

		/*
		 * Only the last input parameter can be variadic; if it is, save its
		 * element type.  Errors here are just elog since caller should have
		 * checked this already.
		 */
		for (i = 0; i < allParamCount; i++)
		{
			switch (modes[i])
			{
				case PROARGMODE_IN:
				case PROARGMODE_INOUT:
					if (OidIsValid(variadicType))
						elog(ERROR, "variadic parameter must be last");
					break;
				case PROARGMODE_OUT:
				case PROARGMODE_TABLE:
					/* okay */
					break;
				case PROARGMODE_VARIADIC:
					if (OidIsValid(variadicType))
						elog(ERROR, "variadic parameter must be last");
					switch (allParams[i])
					{
						case ANYOID:
							variadicType = ANYOID;
							break;
						case ANYARRAYOID:
							variadicType = ANYELEMENTOID;
							break;
						default:
							variadicType = get_element_type(allParams[i]);
							if (!OidIsValid(variadicType))
								elog(ERROR, "variadic parameter is not an array");
							break;
					}
					break;
				default:
					elog(ERROR, "invalid parameter mode '%c'", modes[i]);
					break;
			}
		}
	}

	/*
	 * All seems OK; prepare the data to be inserted into pg_proc.
	 */

	for (i = 0; i < Natts_pg_proc; ++i)
	{
		nulls[i] = false;
		values[i] = (Datum) 0;
		replaces[i] = true;
	}

	namestrcpy(&procname, procedureName);
	values[Anum_pg_proc_proname - 1] = NameGetDatum(&procname);
	values[Anum_pg_proc_pronamespace - 1] = ObjectIdGetDatum(procNamespace);
	values[Anum_pg_proc_proowner - 1] = ObjectIdGetDatum(proowner);
	values[Anum_pg_proc_prolang - 1] = ObjectIdGetDatum(languageObjectId);
	values[Anum_pg_proc_procost - 1] = Float4GetDatum(procost);
	values[Anum_pg_proc_prorows - 1] = Float4GetDatum(prorows);
	values[Anum_pg_proc_provariadic - 1] = ObjectIdGetDatum(variadicType);
	values[Anum_pg_proc_proisagg - 1] = BoolGetDatum(isAgg);
	values[Anum_pg_proc_proiswindow - 1] = BoolGetDatum(isWindowFunc);
	values[Anum_pg_proc_prosecdef - 1] = BoolGetDatum(security_definer);
	values[Anum_pg_proc_proisstrict - 1] = BoolGetDatum(isStrict);
	values[Anum_pg_proc_proretset - 1] = BoolGetDatum(returnsSet);
	values[Anum_pg_proc_provolatile - 1] = CharGetDatum(volatility);
	values[Anum_pg_proc_pronargs - 1] = UInt16GetDatum(parameterCount);
	values[Anum_pg_proc_pronargdefaults - 1] = UInt16GetDatum(list_length(parameterDefaults));
	values[Anum_pg_proc_prorettype - 1] = ObjectIdGetDatum(returnType);
	values[Anum_pg_proc_proargtypes - 1] = PointerGetDatum(parameterTypes);
	if (allParameterTypes != PointerGetDatum(NULL))
		values[Anum_pg_proc_proallargtypes - 1] = allParameterTypes;
	else
		nulls[Anum_pg_proc_proallargtypes - 1] = true;
	if (parameterModes != PointerGetDatum(NULL))
		values[Anum_pg_proc_proargmodes - 1] = parameterModes;
	else
		nulls[Anum_pg_proc_proargmodes - 1] = true;
	if (parameterNames != PointerGetDatum(NULL))
		values[Anum_pg_proc_proargnames - 1] = parameterNames;
	else
		nulls[Anum_pg_proc_proargnames - 1] = true;
	if (parameterDefaults != NIL)
		values[Anum_pg_proc_proargdefaults - 1] = CStringGetTextDatum(nodeToString(parameterDefaults));
	else
		nulls[Anum_pg_proc_proargdefaults - 1] = true;
	values[Anum_pg_proc_prosrc - 1] = CStringGetTextDatum(prosrc);
	if (probin)
		values[Anum_pg_proc_probin - 1] = CStringGetTextDatum(probin);
	else
		nulls[Anum_pg_proc_probin - 1] = true;
	if (proconfig != PointerGetDatum(NULL))
		values[Anum_pg_proc_proconfig - 1] = proconfig;
	else
		nulls[Anum_pg_proc_proconfig - 1] = true;
	/* start out with empty permissions */
	nulls[Anum_pg_proc_proacl - 1] = true;

	rel = heap_open(ProcedureRelationId, RowExclusiveLock);
	tupDesc = RelationGetDescr(rel);

	/* Check for pre-existing definition */
	oldtup = SearchSysCache(PROCNAMEARGSNSP,
							PointerGetDatum(procedureName),
							PointerGetDatum(parameterTypes),
							ObjectIdGetDatum(procNamespace),
							0);

	if (HeapTupleIsValid(oldtup))
	{
		/* There is one; okay to replace it? */
		Form_pg_proc oldproc = (Form_pg_proc) GETSTRUCT(oldtup);

		if (!replace)
			ereport(ERROR,
					(errcode(ERRCODE_DUPLICATE_FUNCTION),
			errmsg("function \"%s\" already exists with same argument types",
				   procedureName)));
		if (!pg_proc_ownercheck(HeapTupleGetOid(oldtup), proowner))
			aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_PROC,
						   procedureName);

		/*
		 * Not okay to change the return type of the existing proc, since
		 * existing rules, views, etc may depend on the return type.
		 */
		if (returnType != oldproc->prorettype ||
			returnsSet != oldproc->proretset)
			ereport(ERROR,
					(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
					 errmsg("cannot change return type of existing function"),
					 errhint("Use DROP FUNCTION first.")));

		/*
		 * If it returns RECORD, check for possible change of record type
		 * implied by OUT parameters
		 */
		if (returnType == RECORDOID)
		{
			TupleDesc	olddesc;
			TupleDesc	newdesc;

			olddesc = build_function_result_tupdesc_t(oldtup);
			newdesc = build_function_result_tupdesc_d(allParameterTypes,
													  parameterModes,
													  parameterNames);
			if (olddesc == NULL && newdesc == NULL)
				 /* ok, both are runtime-defined RECORDs */ ;
			else if (olddesc == NULL || newdesc == NULL ||
					 !equalTupleDescs(olddesc, newdesc))
				ereport(ERROR,
						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
					errmsg("cannot change return type of existing function"),
				errdetail("Row type defined by OUT parameters is different."),
						 errhint("Use DROP FUNCTION first.")));
		}

		/*
		 * If there are existing defaults, check compatibility: redefinition
		 * must not remove any defaults nor change their types.  (Removing a
		 * default might cause a function to fail to satisfy an existing call.
		 * Changing type would only be possible if the associated parameter is
		 * polymorphic, and in such cases a change of default type might alter
		 * the resolved output type of existing calls.)
		 */
		if (oldproc->pronargdefaults != 0)
		{
			Datum		proargdefaults;
			bool		isnull;
			List	   *oldDefaults;
			ListCell   *oldlc;
			ListCell   *newlc;

			if (list_length(parameterDefaults) < oldproc->pronargdefaults)
				ereport(ERROR,
						(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
						 errmsg("cannot remove parameter defaults from existing function"),
						 errhint("Use DROP FUNCTION first.")));

			proargdefaults = SysCacheGetAttr(PROCNAMEARGSNSP, oldtup,
											 Anum_pg_proc_proargdefaults,
											 &isnull);
			Assert(!isnull);
			oldDefaults = (List *) stringToNode(TextDatumGetCString(proargdefaults));
			Assert(IsA(oldDefaults, List));
			Assert(list_length(oldDefaults) == oldproc->pronargdefaults);

			/* new list can have more defaults than old, advance over 'em */
			newlc = list_head(parameterDefaults);
			for (i = list_length(parameterDefaults) - oldproc->pronargdefaults;
				 i > 0;
				 i--)
				newlc = lnext(newlc);

			foreach(oldlc, oldDefaults)
			{
				Node	   *oldDef = (Node *) lfirst(oldlc);
				Node	   *newDef = (Node *) lfirst(newlc);

				if (exprType(oldDef) != exprType(newDef))
					ereport(ERROR,
							(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
							 errmsg("cannot change data type of existing parameter default value"),
							 errhint("Use DROP FUNCTION first.")));
				newlc = lnext(newlc);
			}
		}
예제 #7
0
파일: execDML.c 프로젝트: qiuyesuifeng/gpdb
/*
 * Check if the tuple being updated will stay in the same part and throw ERROR
 * if not.  This check is especially necessary for default partition that has
 * no constraint on it.  partslot is the tuple being updated, and
 * resultRelInfo is the target relation of this update.  Call this only
 * estate has valid es_result_partitions.
 */
static void
checkPartitionUpdate(EState *estate, TupleTableSlot *partslot,
					 ResultRelInfo *resultRelInfo)
{
	Relation	resultRelationDesc = resultRelInfo->ri_RelationDesc;
	AttrNumber	max_attr;
	Datum	   *values = NULL;
	bool	   *nulls = NULL;
	TupleDesc	tupdesc = NULL;
	Oid			parentRelid;
	Oid			targetid;

	Assert(estate->es_partition_state != NULL &&
		   estate->es_partition_state->accessMethods != NULL);
	if (!estate->es_partition_state->accessMethods->part_cxt)
		estate->es_partition_state->accessMethods->part_cxt =
			GetPerTupleExprContext(estate)->ecxt_per_tuple_memory;

	Assert(PointerIsValid(estate->es_result_partitions));

	/*
	 * As opposed to INSERT, resultRelation here is the same child part
	 * as scan origin.  However, the partition selection is done with the
	 * parent partition's attribute numbers, so if this result (child) part
	 * has physically-different attribute numbers due to dropped columns,
	 * we should map the child attribute numbers to the parent's attribute
	 * numbers to perform the partition selection.
	 * EState doesn't have the parent relation information at the moment,
	 * so we have to do a hard job here by opening it and compare the
	 * tuple descriptors.  If we find we need to map attribute numbers,
	 * max_partition_attr could also be bogus for this child part,
	 * so we end up materializing the whole columns using slot_getallattrs().
	 * The purpose of this code is just to prevent the tuple from
	 * incorrectly staying in default partition that has no constraint
	 * (parts with constraint will throw an error if the tuple is changing
	 * partition keys to out of part value anyway.)  It's a bit overkill
	 * to do this complicated logic just for this purpose, which is necessary
	 * with our current partitioning design, but I hope some day we can
	 * change this so that we disallow phyisically-different tuple descriptor
	 * across partition.
	 */
	parentRelid = estate->es_result_partitions->part->parrelid;

	/*
	 * I don't believe this is the case currently, but we check the parent relid
	 * in case the updating partition has changed since the last time we opened it.
	 */
	if (resultRelInfo->ri_PartitionParent &&
		parentRelid != RelationGetRelid(resultRelInfo->ri_PartitionParent))
	{
		resultRelInfo->ri_PartCheckTupDescMatch = 0;
		if (resultRelInfo->ri_PartCheckMap != NULL)
			pfree(resultRelInfo->ri_PartCheckMap);
		if (resultRelInfo->ri_PartitionParent)
			relation_close(resultRelInfo->ri_PartitionParent, AccessShareLock);
	}

	/*
	 * Check this at the first pass only to avoid repeated catalog access.
	 */
	if (resultRelInfo->ri_PartCheckTupDescMatch == 0 &&
		parentRelid != RelationGetRelid(resultRelInfo->ri_RelationDesc))
	{
		Relation	parentRel;
		TupleDesc	resultTupdesc, parentTupdesc;

		/*
		 * We are on a child part, let's see the tuple descriptor looks like
		 * the parent's one.  Probably this won't cause deadlock because
		 * DML should have opened the parent table with appropriate lock.
		 */
		parentRel = relation_open(parentRelid, AccessShareLock);
		resultTupdesc = RelationGetDescr(resultRelationDesc);
		parentTupdesc = RelationGetDescr(parentRel);
		if (!equalTupleDescs(resultTupdesc, parentTupdesc, false))
		{
			AttrMap		   *map;
			MemoryContext	oldcontext;

			/* Tuple looks different.  Construct attribute mapping. */
			oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
			map_part_attrs(resultRelationDesc, parentRel, &map, true);
			MemoryContextSwitchTo(oldcontext);

			/* And save it for later use. */
			resultRelInfo->ri_PartCheckMap = map;

			resultRelInfo->ri_PartCheckTupDescMatch = -1;
		}
		else
			resultRelInfo->ri_PartCheckTupDescMatch = 1;

		resultRelInfo->ri_PartitionParent = parentRel;
		/* parentRel will be closed as part of ResultRelInfo cleanup */
	}

	if (resultRelInfo->ri_PartCheckMap != NULL)
	{
		Datum	   *parent_values;
		bool	   *parent_nulls;
		Relation	parentRel = resultRelInfo->ri_PartitionParent;
		TupleDesc	parentTupdesc;
		AttrMap	   *map;

		Assert(parentRel != NULL);
		parentTupdesc = RelationGetDescr(parentRel);

		/*
		 * We need to map the attribute numbers to parent's one, to
		 * select the would-be destination relation, since all partition
		 * rules are based on the parent relation's tuple descriptor.
		 * max_partition_attr can be bogus as well, so don't use it.
		 */
		slot_getallattrs(partslot);
		values = slot_get_values(partslot);
		nulls = slot_get_isnull(partslot);
		parent_values = palloc(parentTupdesc->natts * sizeof(Datum));
		parent_nulls = palloc0(parentTupdesc->natts * sizeof(bool));

		map = resultRelInfo->ri_PartCheckMap;
		reconstructTupleValues(map, values, nulls, partslot->tts_tupleDescriptor->natts,
							   parent_values, parent_nulls, parentTupdesc->natts);

		/* Now we have values/nulls in parent's view. */
		values = parent_values;
		nulls = parent_nulls;
		tupdesc = RelationGetDescr(parentRel);
	}
	else
	{
		/*
		 * map == NULL means we can just fetch values/nulls from the
		 * current slot.
		 */
		Assert(nulls == NULL && tupdesc == NULL);
		max_attr = estate->es_partition_state->max_partition_attr;
		slot_getsomeattrs(partslot, max_attr);
		/* values/nulls pointing to partslot's array. */
		values = slot_get_values(partslot);
		nulls = slot_get_isnull(partslot);
		tupdesc = partslot->tts_tupleDescriptor;
	}

	/* And select the destination relation that this tuple would go to. */
	targetid = selectPartition(estate->es_result_partitions, values,
							   nulls, tupdesc,
							   estate->es_partition_state->accessMethods);

	/* Free up if we allocated mapped attributes. */
	if (values != slot_get_values(partslot))
	{
		Assert(nulls != slot_get_isnull(partslot));
		pfree(values);
		pfree(nulls);
	}

	if (!OidIsValid(targetid))
		ereport(ERROR,
				(errcode(ERRCODE_NO_PARTITION_FOR_PARTITIONING_KEY),
				 errmsg("no partition for partitioning key")));

	if (RelationGetRelid(resultRelationDesc) != targetid)
		ereport(ERROR,
				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
				 errmsg("moving tuple from partition \"%s\" to "
						"partition \"%s\" not supported",
						get_rel_name(RelationGetRelid(resultRelationDesc)),
						get_rel_name(targetid))));
}