/*
* Prepare the SQLFunctionParseInfo struct for parsing a SQL function body
*
* This includes resolving actual types of polymorphic arguments.
*
* call_expr can be passed as NULL, but then we will fail if there are any
* polymorphic arguments.
*/
SQLFunctionParseInfoPtr
prepare_sql_fn_parse_info(HeapTuple procedureTuple,
Node *call_expr,
Oid inputCollation)
{
SQLFunctionParseInfoPtr pinfo;
Form_pg_proc procedureStruct = (Form_pg_proc) GETSTRUCT(procedureTuple);
int nargs;
pinfo = (SQLFunctionParseInfoPtr) palloc0(sizeof(SQLFunctionParseInfo));
/* Save the function's input collation */
pinfo->collation = inputCollation;
/*
* Copy input argument types from the pg_proc entry, then resolve any
* polymorphic types.
*/
pinfo->nargs = nargs = procedureStruct->pronargs;
if (nargs > 0)
{
Oid *argOidVect;
int argnum;
argOidVect = (Oid *) palloc(nargs * sizeof(Oid));
memcpy(argOidVect,
procedureStruct->proargtypes.values,
nargs * sizeof(Oid));
for (argnum = 0; argnum < nargs; argnum++)
{
Oid argtype = argOidVect[argnum];
if (IsPolymorphicType(argtype))
{
argtype = get_call_expr_argtype(call_expr, argnum);
if (argtype == InvalidOid)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("could not determine actual type of argument declared %s",
format_type_be(argOidVect[argnum]))));
argOidVect[argnum] = argtype;
}
}
pinfo->argtypes = argOidVect;
}
return pinfo;
}
/* ----------------------------------------------------------------
* 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);
}
}
/*
* AggregateCreate
*/
ObjectAddress
AggregateCreate(const char *aggName,
Oid aggNamespace,
char aggKind,
int numArgs,
int numDirectArgs,
oidvector *parameterTypes,
Datum allParameterTypes,
Datum parameterModes,
Datum parameterNames,
List *parameterDefaults,
Oid variadicArgType,
List *aggtransfnName,
List *aggfinalfnName,
List *aggcombinefnName,
List *aggserialfnName,
List *aggdeserialfnName,
List *aggmtransfnName,
List *aggminvtransfnName,
List *aggmfinalfnName,
bool finalfnExtraArgs,
bool mfinalfnExtraArgs,
List *aggsortopName,
Oid aggTransType,
Oid aggSerialType,
int32 aggTransSpace,
Oid aggmTransType,
int32 aggmTransSpace,
const char *agginitval,
const char *aggminitval,
char proparallel)
{
Relation aggdesc;
HeapTuple tup;
bool nulls[Natts_pg_aggregate];
Datum values[Natts_pg_aggregate];
Form_pg_proc proc;
Oid transfn;
Oid finalfn = InvalidOid; /* can be omitted */
Oid combinefn = InvalidOid; /* can be omitted */
Oid serialfn = InvalidOid; /* can be omitted */
Oid deserialfn = InvalidOid; /* can be omitted */
Oid mtransfn = InvalidOid; /* can be omitted */
Oid minvtransfn = InvalidOid; /* can be omitted */
Oid mfinalfn = InvalidOid; /* can be omitted */
Oid sortop = InvalidOid; /* can be omitted */
Oid *aggArgTypes = parameterTypes->values;
bool hasPolyArg;
bool hasInternalArg;
bool mtransIsStrict = false;
Oid rettype;
Oid finaltype;
Oid fnArgs[FUNC_MAX_ARGS];
int nargs_transfn;
int nargs_finalfn;
Oid procOid;
TupleDesc tupDesc;
int i;
ObjectAddress myself,
referenced;
AclResult aclresult;
/* sanity checks (caller should have caught these) */
if (!aggName)
elog(ERROR, "no aggregate name supplied");
if (!aggtransfnName)
elog(ERROR, "aggregate must have a transition function");
if (numDirectArgs < 0 || numDirectArgs > numArgs)
elog(ERROR, "incorrect number of direct args for aggregate");
/*
* Aggregates can have at most FUNC_MAX_ARGS-1 args, else the transfn
* and/or finalfn will be unrepresentable in pg_proc. We must check now
* to protect fixed-size arrays here and possibly in called functions.
*/
if (numArgs < 0 || numArgs > FUNC_MAX_ARGS - 1)
ereport(ERROR,
(errcode(ERRCODE_TOO_MANY_ARGUMENTS),
errmsg_plural("aggregates cannot have more than %d argument",
"aggregates cannot have more than %d arguments",
FUNC_MAX_ARGS - 1,
FUNC_MAX_ARGS - 1)));
/* check for polymorphic and INTERNAL arguments */
hasPolyArg = false;
hasInternalArg = false;
for (i = 0; i < numArgs; i++)
{
if (IsPolymorphicType(aggArgTypes[i]))
hasPolyArg = true;
else if (aggArgTypes[i] == INTERNALOID)
hasInternalArg = true;
}
/*
* If transtype is polymorphic, must have polymorphic argument also; else
* we will have no way to deduce the actual transtype.
*/
if (IsPolymorphicType(aggTransType) && !hasPolyArg)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("cannot determine transition data type"),
errdetail("An aggregate using a polymorphic transition type must have at least one polymorphic argument.")));
/*
* Likewise for moving-aggregate transtype, if any
*/
if (OidIsValid(aggmTransType) &&
IsPolymorphicType(aggmTransType) && !hasPolyArg)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("cannot determine transition data type"),
errdetail("An aggregate using a polymorphic transition type must have at least one polymorphic argument.")));
/*
* An ordered-set aggregate that is VARIADIC must be VARIADIC ANY. In
* principle we could support regular variadic types, but it would make
* things much more complicated because we'd have to assemble the correct
* subsets of arguments into array values. Since no standard aggregates
* have use for such a case, we aren't bothering for now.
*/
if (AGGKIND_IS_ORDERED_SET(aggKind) && OidIsValid(variadicArgType) &&
variadicArgType != ANYOID)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("a variadic ordered-set aggregate must use VARIADIC type ANY")));
/*
* If it's a hypothetical-set aggregate, there must be at least as many
* direct arguments as aggregated ones, and the last N direct arguments
* must match the aggregated ones in type. (We have to check this again
* when the aggregate is called, in case ANY is involved, but it makes
* sense to reject the aggregate definition now if the declared arg types
* don't match up.) It's unconditionally OK if numDirectArgs == numArgs,
* indicating that the grammar merged identical VARIADIC entries from both
* lists. Otherwise, if the agg is VARIADIC, then we had VARIADIC only on
* the aggregated side, which is not OK. Otherwise, insist on the last N
* parameter types on each side matching exactly.
*/
if (aggKind == AGGKIND_HYPOTHETICAL &&
numDirectArgs < numArgs)
{
int numAggregatedArgs = numArgs - numDirectArgs;
if (OidIsValid(variadicArgType) ||
numDirectArgs < numAggregatedArgs ||
memcmp(aggArgTypes + (numDirectArgs - numAggregatedArgs),
aggArgTypes + numDirectArgs,
numAggregatedArgs * sizeof(Oid)) != 0)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("a hypothetical-set aggregate must have direct arguments matching its aggregated arguments")));
}
/*
* Find the transfn. For ordinary aggs, it takes the transtype plus all
* aggregate arguments. For ordered-set aggs, it takes the transtype plus
* all aggregated args, but not direct args. However, we have to treat
* specially the case where a trailing VARIADIC item is considered to
* cover both direct and aggregated args.
*/
if (AGGKIND_IS_ORDERED_SET(aggKind))
{
if (numDirectArgs < numArgs)
nargs_transfn = numArgs - numDirectArgs + 1;
else
{
/* special case with VARIADIC last arg */
Assert(variadicArgType != InvalidOid);
nargs_transfn = 2;
}
fnArgs[0] = aggTransType;
memcpy(fnArgs + 1, aggArgTypes + (numArgs - (nargs_transfn - 1)),
(nargs_transfn - 1) * sizeof(Oid));
}
else
{
nargs_transfn = numArgs + 1;
fnArgs[0] = aggTransType;
memcpy(fnArgs + 1, aggArgTypes, numArgs * sizeof(Oid));
}
transfn = lookup_agg_function(aggtransfnName, nargs_transfn,
fnArgs, variadicArgType,
&rettype);
/*
* Return type of transfn (possibly after refinement by
* enforce_generic_type_consistency, if transtype isn't polymorphic) must
* exactly match declared transtype.
*
* In the non-polymorphic-transtype case, it might be okay to allow a
* rettype that's binary-coercible to transtype, but I'm not quite
* convinced that it's either safe or useful. When transtype is
* polymorphic we *must* demand exact equality.
*/
if (rettype != aggTransType)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("return type of transition function %s is not %s",
NameListToString(aggtransfnName),
format_type_be(aggTransType))));
tup = SearchSysCache1(PROCOID, ObjectIdGetDatum(transfn));
if (!HeapTupleIsValid(tup))
elog(ERROR, "cache lookup failed for function %u", transfn);
proc = (Form_pg_proc) GETSTRUCT(tup);
/*
* If the transfn is strict and the initval is NULL, make sure first input
* type and transtype are the same (or at least binary-compatible), so
* that it's OK to use the first input value as the initial transValue.
*/
if (proc->proisstrict && agginitval == NULL)
{
if (numArgs < 1 ||
!IsBinaryCoercible(aggArgTypes[0], aggTransType))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("must not omit initial value when transition function is strict and transition type is not compatible with input type")));
}
ReleaseSysCache(tup);
/* handle moving-aggregate transfn, if supplied */
if (aggmtransfnName)
{
/*
* The arguments are the same as for the regular transfn, except that
* the transition data type might be different. So re-use the fnArgs
* values set up above, except for that one.
*/
Assert(OidIsValid(aggmTransType));
fnArgs[0] = aggmTransType;
mtransfn = lookup_agg_function(aggmtransfnName, nargs_transfn,
fnArgs, variadicArgType,
&rettype);
/* As above, return type must exactly match declared mtranstype. */
if (rettype != aggmTransType)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("return type of transition function %s is not %s",
NameListToString(aggmtransfnName),
format_type_be(aggmTransType))));
tup = SearchSysCache1(PROCOID, ObjectIdGetDatum(mtransfn));
if (!HeapTupleIsValid(tup))
elog(ERROR, "cache lookup failed for function %u", mtransfn);
proc = (Form_pg_proc) GETSTRUCT(tup);
/*
* If the mtransfn is strict and the minitval is NULL, check first
* input type and mtranstype are binary-compatible.
*/
if (proc->proisstrict && aggminitval == NULL)
{
if (numArgs < 1 ||
!IsBinaryCoercible(aggArgTypes[0], aggmTransType))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("must not omit initial value when transition function is strict and transition type is not compatible with input type")));
}
/* Remember if mtransfn is strict; we may need this below */
mtransIsStrict = proc->proisstrict;
ReleaseSysCache(tup);
}
/* handle minvtransfn, if supplied */
if (aggminvtransfnName)
{
/*
* This must have the same number of arguments with the same types as
* the forward transition function, so just re-use the fnArgs data.
*/
Assert(aggmtransfnName);
minvtransfn = lookup_agg_function(aggminvtransfnName, nargs_transfn,
fnArgs, variadicArgType,
&rettype);
/* As above, return type must exactly match declared mtranstype. */
if (rettype != aggmTransType)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("return type of inverse transition function %s is not %s",
NameListToString(aggminvtransfnName),
format_type_be(aggmTransType))));
tup = SearchSysCache1(PROCOID, ObjectIdGetDatum(minvtransfn));
if (!HeapTupleIsValid(tup))
elog(ERROR, "cache lookup failed for function %u", minvtransfn);
proc = (Form_pg_proc) GETSTRUCT(tup);
/*
* We require the strictness settings of the forward and inverse
* transition functions to agree. This saves having to handle
* assorted special cases at execution time.
*/
if (proc->proisstrict != mtransIsStrict)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("strictness of aggregate's forward and inverse transition functions must match")));
ReleaseSysCache(tup);
}
/* handle finalfn, if supplied */
if (aggfinalfnName)
{
/*
* If finalfnExtraArgs is specified, the transfn takes the transtype
* plus all args; otherwise, it just takes the transtype plus any
* direct args. (Non-direct args are useless at runtime, and are
* actually passed as NULLs, but we may need them in the function
* signature to allow resolution of a polymorphic agg's result type.)
*/
Oid ffnVariadicArgType = variadicArgType;
fnArgs[0] = aggTransType;
memcpy(fnArgs + 1, aggArgTypes, numArgs * sizeof(Oid));
if (finalfnExtraArgs)
nargs_finalfn = numArgs + 1;
else
{
nargs_finalfn = numDirectArgs + 1;
if (numDirectArgs < numArgs)
{
/* variadic argument doesn't affect finalfn */
ffnVariadicArgType = InvalidOid;
}
}
finalfn = lookup_agg_function(aggfinalfnName, nargs_finalfn,
fnArgs, ffnVariadicArgType,
&finaltype);
/*
* When finalfnExtraArgs is specified, the finalfn will certainly be
* passed at least one null argument, so complain if it's strict.
* Nothing bad would happen at runtime (you'd just get a null result),
* but it's surely not what the user wants, so let's complain now.
*/
if (finalfnExtraArgs && func_strict(finalfn))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("final function with extra arguments must not be declared STRICT")));
}
else
{
/*
* If no finalfn, aggregate result type is type of the state value
*/
finaltype = aggTransType;
}
Assert(OidIsValid(finaltype));
/* handle the combinefn, if supplied */
if (aggcombinefnName)
{
Oid combineType;
/*
* Combine function must have 2 argument, each of which is the trans
* type
*/
fnArgs[0] = aggTransType;
fnArgs[1] = aggTransType;
combinefn = lookup_agg_function(aggcombinefnName, 2, fnArgs,
variadicArgType, &combineType);
/* Ensure the return type matches the aggregates trans type */
if (combineType != aggTransType)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("return type of combine function %s is not %s",
NameListToString(aggcombinefnName),
format_type_be(aggTransType))));
/*
* A combine function to combine INTERNAL states must accept nulls and
* ensure that the returned state is in the correct memory context.
*/
if (aggTransType == INTERNALOID && func_strict(combinefn))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("combine function with \"%s\" transition type must not be declared STRICT",
format_type_be(aggTransType))));
}
/*
* Validate the serialization function, if present. We must ensure that
* the return type of this function is the same as the specified
* serialType.
*/
if (aggserialfnName)
{
fnArgs[0] = aggTransType;
serialfn = lookup_agg_function(aggserialfnName, 1,
fnArgs, variadicArgType,
&rettype);
if (rettype != aggSerialType)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("return type of serialization function %s is not %s",
NameListToString(aggserialfnName),
format_type_be(aggSerialType))));
}
/*
* Validate the deserialization function, if present. We must ensure that
* the return type of this function is the same as the transType.
*/
if (aggdeserialfnName)
{
fnArgs[0] = aggSerialType;
deserialfn = lookup_agg_function(aggdeserialfnName, 1,
fnArgs, variadicArgType,
&rettype);
if (rettype != aggTransType)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("return type of deserialization function %s is not %s",
NameListToString(aggdeserialfnName),
format_type_be(aggTransType))));
}
/*
* If finaltype (i.e. aggregate return type) is polymorphic, inputs must
* be polymorphic also, else parser will fail to deduce result type.
* (Note: given the previous test on transtype and inputs, this cannot
* happen, unless someone has snuck a finalfn definition into the catalogs
* that itself violates the rule against polymorphic result with no
* polymorphic input.)
*/
if (IsPolymorphicType(finaltype) && !hasPolyArg)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("cannot determine result data type"),
errdetail("An aggregate returning a polymorphic type "
"must have at least one polymorphic argument.")));
/*
* Also, the return type can't be INTERNAL unless there's at least one
* INTERNAL argument. This is the same type-safety restriction we enforce
* for regular functions, but at the level of aggregates. We must test
* this explicitly because we allow INTERNAL as the transtype.
*/
if (finaltype == INTERNALOID && !hasInternalArg)
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 a moving-aggregate implementation is supplied, look up its finalfn
* if any, and check that the implied aggregate result type matches the
* plain implementation.
*/
if (OidIsValid(aggmTransType))
{
/* handle finalfn, if supplied */
if (aggmfinalfnName)
{
/*
* The arguments are figured the same way as for the regular
* finalfn, but using aggmTransType and mfinalfnExtraArgs.
*/
Oid ffnVariadicArgType = variadicArgType;
fnArgs[0] = aggmTransType;
memcpy(fnArgs + 1, aggArgTypes, numArgs * sizeof(Oid));
if (mfinalfnExtraArgs)
nargs_finalfn = numArgs + 1;
else
{
nargs_finalfn = numDirectArgs + 1;
if (numDirectArgs < numArgs)
{
/* variadic argument doesn't affect finalfn */
ffnVariadicArgType = InvalidOid;
}
}
mfinalfn = lookup_agg_function(aggmfinalfnName, nargs_finalfn,
fnArgs, ffnVariadicArgType,
&rettype);
/* As above, check strictness if mfinalfnExtraArgs is given */
if (mfinalfnExtraArgs && func_strict(mfinalfn))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("final function with extra arguments must not be declared STRICT")));
}
else
{
/*
* If no finalfn, aggregate result type is type of the state value
*/
rettype = aggmTransType;
}
Assert(OidIsValid(rettype));
if (rettype != finaltype)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("moving-aggregate implementation returns type %s, but plain implementation returns type %s",
format_type_be(aggmTransType),
format_type_be(aggTransType))));
}
/* handle sortop, if supplied */
if (aggsortopName)
{
if (numArgs != 1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("sort operator can only be specified for single-argument aggregates")));
sortop = LookupOperName(NULL, aggsortopName,
aggArgTypes[0], aggArgTypes[0],
false, -1);
}
/*
* permission checks on used types
*/
for (i = 0; i < numArgs; i++)
{
aclresult = pg_type_aclcheck(aggArgTypes[i], GetUserId(), ACL_USAGE);
if (aclresult != ACLCHECK_OK)
aclcheck_error_type(aclresult, aggArgTypes[i]);
}
aclresult = pg_type_aclcheck(aggTransType, GetUserId(), ACL_USAGE);
if (aclresult != ACLCHECK_OK)
aclcheck_error_type(aclresult, aggTransType);
if (OidIsValid(aggmTransType))
{
aclresult = pg_type_aclcheck(aggmTransType, GetUserId(), ACL_USAGE);
if (aclresult != ACLCHECK_OK)
aclcheck_error_type(aclresult, aggmTransType);
}
aclresult = pg_type_aclcheck(finaltype, GetUserId(), ACL_USAGE);
if (aclresult != ACLCHECK_OK)
aclcheck_error_type(aclresult, finaltype);
/*
* Everything looks okay. Try to create the pg_proc entry for the
* aggregate. (This could fail if there's already a conflicting entry.)
*/
myself = ProcedureCreate(aggName,
aggNamespace,
false, /* no replacement */
false, /* doesn't return a set */
finaltype, /* returnType */
GetUserId(), /* proowner */
INTERNALlanguageId, /* languageObjectId */
InvalidOid, /* no validator */
"aggregate_dummy", /* placeholder proc */
NULL, /* probin */
true, /* isAgg */
false, /* isWindowFunc */
false, /* security invoker (currently not
* definable for agg) */
false, /* isLeakProof */
false, /* isStrict (not needed for agg) */
PROVOLATILE_IMMUTABLE, /* volatility (not
* needed for agg) */
proparallel,
parameterTypes, /* paramTypes */
allParameterTypes, /* allParamTypes */
parameterModes, /* parameterModes */
parameterNames, /* parameterNames */
parameterDefaults, /* parameterDefaults */
PointerGetDatum(NULL), /* trftypes */
PointerGetDatum(NULL), /* proconfig */
1, /* procost */
0); /* prorows */
procOid = myself.objectId;
/*
* Okay to create the pg_aggregate entry.
*/
/* initialize nulls and values */
for (i = 0; i < Natts_pg_aggregate; i++)
{
nulls[i] = false;
values[i] = (Datum) NULL;
}
values[Anum_pg_aggregate_aggfnoid - 1] = ObjectIdGetDatum(procOid);
values[Anum_pg_aggregate_aggkind - 1] = CharGetDatum(aggKind);
values[Anum_pg_aggregate_aggnumdirectargs - 1] = Int16GetDatum(numDirectArgs);
values[Anum_pg_aggregate_aggtransfn - 1] = ObjectIdGetDatum(transfn);
values[Anum_pg_aggregate_aggfinalfn - 1] = ObjectIdGetDatum(finalfn);
values[Anum_pg_aggregate_aggcombinefn - 1] = ObjectIdGetDatum(combinefn);
values[Anum_pg_aggregate_aggserialfn - 1] = ObjectIdGetDatum(serialfn);
values[Anum_pg_aggregate_aggdeserialfn - 1] = ObjectIdGetDatum(deserialfn);
values[Anum_pg_aggregate_aggmtransfn - 1] = ObjectIdGetDatum(mtransfn);
values[Anum_pg_aggregate_aggminvtransfn - 1] = ObjectIdGetDatum(minvtransfn);
values[Anum_pg_aggregate_aggmfinalfn - 1] = ObjectIdGetDatum(mfinalfn);
values[Anum_pg_aggregate_aggfinalextra - 1] = BoolGetDatum(finalfnExtraArgs);
values[Anum_pg_aggregate_aggmfinalextra - 1] = BoolGetDatum(mfinalfnExtraArgs);
values[Anum_pg_aggregate_aggsortop - 1] = ObjectIdGetDatum(sortop);
values[Anum_pg_aggregate_aggtranstype - 1] = ObjectIdGetDatum(aggTransType);
values[Anum_pg_aggregate_aggserialtype - 1] = ObjectIdGetDatum(aggSerialType);
values[Anum_pg_aggregate_aggtransspace - 1] = Int32GetDatum(aggTransSpace);
values[Anum_pg_aggregate_aggmtranstype - 1] = ObjectIdGetDatum(aggmTransType);
values[Anum_pg_aggregate_aggmtransspace - 1] = Int32GetDatum(aggmTransSpace);
if (agginitval)
values[Anum_pg_aggregate_agginitval - 1] = CStringGetTextDatum(agginitval);
else
nulls[Anum_pg_aggregate_agginitval - 1] = true;
if (aggminitval)
values[Anum_pg_aggregate_aggminitval - 1] = CStringGetTextDatum(aggminitval);
else
nulls[Anum_pg_aggregate_aggminitval - 1] = true;
aggdesc = heap_open(AggregateRelationId, RowExclusiveLock);
tupDesc = aggdesc->rd_att;
tup = heap_form_tuple(tupDesc, values, nulls);
simple_heap_insert(aggdesc, tup);
CatalogUpdateIndexes(aggdesc, tup);
heap_close(aggdesc, RowExclusiveLock);
/*
* Create dependencies for the aggregate (above and beyond those already
* made by ProcedureCreate). Note: we don't need an explicit dependency
* on aggTransType since we depend on it indirectly through transfn.
* Likewise for aggmTransType using the mtransfunc, and also for
* aggSerialType using the serialfn, if they exist.
*/
/* Depends on transition function */
referenced.classId = ProcedureRelationId;
referenced.objectId = transfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
/* Depends on final function, if any */
if (OidIsValid(finalfn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = finalfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on combine function, if any */
if (OidIsValid(combinefn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = combinefn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on serialization function, if any */
if (OidIsValid(serialfn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = serialfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on deserialization function, if any */
if (OidIsValid(deserialfn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = deserialfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on forward transition function, if any */
if (OidIsValid(mtransfn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = mtransfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on inverse transition function, if any */
if (OidIsValid(minvtransfn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = minvtransfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on final function, if any */
if (OidIsValid(mfinalfn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = mfinalfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on sort operator, if any */
if (OidIsValid(sortop))
{
referenced.classId = OperatorRelationId;
referenced.objectId = sortop;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
return myself;
}
/*
* make_scalar_array_op()
* Build expression tree for "scalar op ANY/ALL (array)" construct.
*/
Expr *
make_scalar_array_op(ParseState *pstate, List *opname,
bool useOr,
Node *ltree, Node *rtree,
int location)
{
Oid ltypeId,
rtypeId,
atypeId,
res_atypeId;
Operator tup;
Form_pg_operator opform;
Oid actual_arg_types[2];
Oid declared_arg_types[2];
List *args;
Oid rettype;
ScalarArrayOpExpr *result;
ltypeId = exprType(ltree);
atypeId = exprType(rtree);
/*
* The right-hand input of the operator will be the element type of the
* array. However, if we currently have just an untyped literal on the
* right, stay with that and hope we can resolve the operator.
*/
if (atypeId == UNKNOWNOID)
rtypeId = UNKNOWNOID;
else
{
rtypeId = get_base_element_type(atypeId);
if (!OidIsValid(rtypeId))
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("op ANY/ALL (array) requires array on right side"),
parser_errposition(pstate, location)));
}
/* Now resolve the operator */
tup = oper(pstate, opname, ltypeId, rtypeId, false, location);
opform = (Form_pg_operator) GETSTRUCT(tup);
/* Check it's not a shell */
if (!RegProcedureIsValid(opform->oprcode))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_FUNCTION),
errmsg("operator is only a shell: %s",
op_signature_string(opname,
opform->oprkind,
opform->oprleft,
opform->oprright)),
parser_errposition(pstate, location)));
args = list_make2(ltree, rtree);
actual_arg_types[0] = ltypeId;
actual_arg_types[1] = rtypeId;
declared_arg_types[0] = opform->oprleft;
declared_arg_types[1] = opform->oprright;
/*
* enforce consistency with polymorphic argument and return types,
* possibly adjusting return type or declared_arg_types (which will be
* used as the cast destination by make_fn_arguments)
*/
rettype = enforce_generic_type_consistency(actual_arg_types,
declared_arg_types,
2,
opform->oprresult,
false);
/*
* Check that operator result is boolean
*/
if (rettype != BOOLOID)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("op ANY/ALL (array) requires operator to yield boolean"),
parser_errposition(pstate, location)));
if (get_func_retset(opform->oprcode))
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("op ANY/ALL (array) requires operator not to return a set"),
parser_errposition(pstate, location)));
/*
* Now switch back to the array type on the right, arranging for any
* needed cast to be applied. Beware of polymorphic operators here;
* enforce_generic_type_consistency may or may not have replaced a
* polymorphic type with a real one.
*/
if (IsPolymorphicType(declared_arg_types[1]))
{
/* assume the actual array type is OK */
res_atypeId = atypeId;
}
else
{
res_atypeId = get_array_type(declared_arg_types[1]);
if (!OidIsValid(res_atypeId))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("could not find array type for data type %s",
format_type_be(declared_arg_types[1])),
parser_errposition(pstate, location)));
}
actual_arg_types[1] = atypeId;
declared_arg_types[1] = res_atypeId;
/* perform the necessary typecasting of arguments */
make_fn_arguments(pstate, args, actual_arg_types, declared_arg_types);
/* and build the expression node */
result = makeNode(ScalarArrayOpExpr);
result->opno = oprid(tup);
result->opfuncid = opform->oprcode;
result->useOr = useOr;
/* inputcollid will be set by parse_collate.c */
result->args = args;
result->location = location;
ReleaseSysCache(tup);
return (Expr *) result;
}
TupleCheckStatus
FilterInit(Filter *filter, TupleDesc desc, Oid collation)
{
int i;
ParsedFunction func;
HeapTuple ftup;
HeapTuple ltup;
Form_pg_proc pp;
Form_pg_language lp;
TupleCheckStatus status = NEED_COERCION_CHECK;
if (filter->funcstr == NULL)
return NO_COERCION;
/* parse filter function */
func = ParseFunction(filter->funcstr, true);
filter->funcid = func.oid;
filter->nargs = func.nargs;
for (i = 0; i < filter->nargs; i++)
{
/* Check for polymorphic types and internal pseudo-type argument */
if (IsPolymorphicType(func.argtypes[i]) ||
func.argtypes[i] == INTERNALOID)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("filter function does not support a polymorphic function and having a internal pseudo-type argument function: %s",
get_func_name(filter->funcid))));
filter->argtypes[i] = func.argtypes[i];
}
ftup = SearchSysCache(PROCOID, ObjectIdGetDatum(filter->funcid), 0, 0, 0);
pp = (Form_pg_proc) GETSTRUCT(ftup);
if (pp->proretset)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("filter function must not return set")));
/* Check data type of the function result value */
if (pp->prorettype == desc->tdtypeid && pp->prorettype != RECORDOID)
status = NO_COERCION;
else if (pp->prorettype == RECORDOID)
{
TupleDesc resultDesc = NULL;
/* Check for OUT parameters defining a RECORD result */
resultDesc = build_function_result_tupdesc_t(ftup);
if (resultDesc)
{
if (tupledesc_match(desc, resultDesc))
status = NO_COERCION;
FreeTupleDesc(resultDesc);
}
}
else if (get_typtype(pp->prorettype) != TYPTYPE_COMPOSITE)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("function return data type and target table data type do not match")));
/* Get default values */
#if PG_VERSION_NUM >= 80400
filter->fn_ndargs = pp->pronargdefaults;
if (filter->fn_ndargs > 0)
{
Datum proargdefaults;
bool isnull;
char *str;
List *defaults;
ListCell *l;
filter->defaultValues = palloc(sizeof(Datum) * filter->fn_ndargs);
filter->defaultIsnull = palloc(sizeof(bool) * filter->fn_ndargs);
proargdefaults = SysCacheGetAttr(PROCOID, ftup,
Anum_pg_proc_proargdefaults,
&isnull);
Assert(!isnull);
str = TextDatumGetCString(proargdefaults);
defaults = (List *) stringToNode(str);
Assert(IsA(defaults, List));
pfree(str);
filter->econtext = CreateStandaloneExprContext();
i = 0;
foreach(l, defaults)
{
Expr *expr = (Expr *) lfirst(l);
ExprState *argstate;
ExprDoneCond thisArgIsDone;
argstate = ExecInitExpr(expr, NULL);
filter->defaultValues[i] = ExecEvalExpr(argstate,
filter->econtext,
&filter->defaultIsnull[i],
&thisArgIsDone);
if (thisArgIsDone != ExprSingleResult)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("functions and operators can take at most one set argument")));
i++;
}
/*
* Polymorph the polymorphic types in the TupleDesc to the appropriate type
* related to the 'target' base type.
*
* Polymorphic types are pseudo types and thus Postgres won't store them,
* so 'self' will never be a relation type.
*/
PyObj
PyPgTupleDesc_Polymorph(PyObj self, PyObj target)
{
int i;
TupleDesc td;
PyObj td_types, rob;
MemoryContext former;
Assert(PyPgTupleDesc_CheckExact(self));
Assert(PyPgTupleDesc_GetPolymorphic(self) != -1);
Assert(PyPgType_Check(target));
Assert(!PyPgType_IsPolymorphic(target));
td_types = PyPgTupleDesc_GetTypesTuple(self);
td = PyPgTupleDesc_GetTupleDesc(self);
/*
* We need to update any polymorphic attributes, so
* grab a copy.
*/
former = MemoryContextSwitchTo(PythonMemoryContext);
if (td->constr != NULL)
td = Py_CreateTupleDescCopyConstr(td);
else
td = Py_CreateTupleDescCopy(td);
MemoryContextSwitchTo(former);
if (td == NULL)
return(NULL);
for (i = 0; i < td->natts; ++i)
{
PyObj polymorphic_type, polymorphed_type;
PyPgTypeInfo typinfo;
if (!IsPolymorphicType(td->attrs[i]->atttypid))
continue;
polymorphic_type = PyTuple_GET_ITEM(td_types, i);
polymorphed_type = PyPgType_Polymorph(polymorphic_type, target);
if (polymorphed_type == NULL)
{
Py_FreeTupleDesc(td);
return(NULL);
}
typinfo = PyPgTypeInfo(polymorphed_type);
/*
* It's not a pseudo type anymore; change the oid.
*/
td->attrs[i]->atttypid = typinfo->typoid;
td->attrs[i]->attalign = typinfo->typalign;
td->attrs[i]->attbyval = typinfo->typbyval;
td->attrs[i]->attlen = typinfo->typlen;
/*
* Done with that type for now.
* PyPgTupleDesc_New() will grab a new reference when it builds the types
* tuple.
*/
Py_DECREF(polymorphed_type);
}
/*
* Make and return the PyPgTupleDesc object..
*/
rob = PyPgTupleDesc_New(td);
Assert(PyPgTupleDesc_GetPolymorphic(rob) == -1);
return(rob);
}
PyObj
PyPgTupleDesc_NEW(PyTypeObject *subtype, TupleDesc td)
{
int i, anatts = 0, byrefnatts = 0, poly = -1;
int attnum, free_att;
int *idxmap, *freemap = NULL;
MemoryContext former;
PyObj typs, namemap, names, rob;
rob = ((PyObj) subtype->tp_alloc(subtype, 0));
if (rob == NULL)
{
/*
* Subsequent failures will free the TupleDesc via dealloc,
* so be consistent and clear it here as we couldn't get 'rob'.
*/
Py_FreeTupleDesc(td);
return(NULL);
}
PyPgTupleDesc_SetTupleDesc(rob, td);
typs = TupleDesc_GetPyPgTypes(td);
if (typs == NULL)
{
Py_DECREF(rob);
return(NULL);
}
PyPgTupleDesc_SetTypesTuple(rob, typs);
for (i = 0; i < td->natts; ++i)
{
if (!td->attrs[i]->attisdropped)
{
++anatts;
if (!td->attrs[i]->attbyval)
++byrefnatts;
if (poly == -1 && IsPolymorphicType(td->attrs[i]->atttypid))
poly = i;
}
}
PyPgTupleDesc_SetNatts(rob, anatts); /* active attributes */
PyPgTupleDesc_SetPolymorphic(rob, poly); /* first polymorphic att */
names = TupleDesc_BuildNames(td, anatts);
if (names == NULL)
{
Py_DECREF(rob);
return(NULL);
}
PyPgTupleDesc_SetNames(rob, names);
namemap = build_name_map(names);
if (namemap == NULL)
{
Py_DECREF(rob);
return(NULL);
}
PyPgTupleDesc_SetNameMap(rob, namemap);
/*
* Build IndexMap and FreeMap
*
* Fast access to !dropped attributes and
* Fast access to !byval attributes.
*/
/*
* Dropped attribute exist. In this case,
* fast access to the actual attribute number is
* desired, so create the index map for the TupleDesc
* to speed things along.
*
* In situations where Datums and Nulls are built,
* fast access to the !typbyval Datum indexes is provided
* by the freemap.
*/
former = MemoryContextSwitchTo(PythonMemoryContext);
idxmap = Py_palloc(sizeof(int) * (anatts + 1));
if (idxmap != NULL)
{
freemap = Py_palloc(sizeof(int) * (byrefnatts + 1));
if (freemap == NULL)
{
pfree(idxmap);
idxmap = NULL;
}
}
MemoryContextSwitchTo(former);
if (idxmap == NULL)
{
Py_DECREF(rob);
return(NULL);
}
/*
* No more Python or Postgres calls are made from here out.
*/
for (i = 0, attnum = 0, free_att = 0; i < td->natts; ++i)
{
if (attnum == anatts)
{
/* The rest are dropped; exit loop. */
break;
}
/*
* If it's dropped, it will not take part in the index map,
* nor will a Datum ever need to be freed at its index.
*/
if (td->attrs[i]->attisdropped)
continue;
if (!td->attrs[i]->attbyval)
{
freemap[free_att] = i;
++free_att;
}
idxmap[attnum] = i;
++attnum;
}
/* Terminate the maps */
freemap[byrefnatts] = -1;
idxmap[anatts] = -1;
PyPgTupleDesc_SetIndexMap(rob, idxmap);
PyPgTupleDesc_SetFreeMap(rob, freemap);
return(rob);
}
Datum
plpgsql_validator(PG_FUNCTION_ARGS)
{
Oid funcoid = PG_GETARG_OID(0);
HeapTuple tuple;
Form_pg_proc proc;
char functyptype;
int numargs;
Oid *argtypes;
char **argnames;
char *argmodes;
bool istrigger = false;
int i;
if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
PG_RETURN_VOID();
/* Get the new function's pg_proc entry */
tuple = SearchSysCache(PROCOID,
ObjectIdGetDatum(funcoid),
0, 0, 0);
if (!HeapTupleIsValid(tuple))
elog(ERROR, "cache lookup failed for function %u", funcoid);
proc = (Form_pg_proc) GETSTRUCT(tuple);
functyptype = get_typtype(proc->prorettype);
/* Disallow pseudotype result */
/* except for TRIGGER, RECORD, VOID, or polymorphic */
if (functyptype == TYPTYPE_PSEUDO)
{
/* we assume OPAQUE with no arguments means a trigger */
if (proc->prorettype == TRIGGEROID ||
(proc->prorettype == OPAQUEOID && proc->pronargs == 0))
istrigger = true;
else if (proc->prorettype != RECORDOID &&
proc->prorettype != VOIDOID &&
!IsPolymorphicType(proc->prorettype))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("PL/pgSQL functions cannot return type %s",
format_type_be(proc->prorettype))));
}
/* Disallow pseudotypes in arguments (either IN or OUT) */
/* except for polymorphic */
numargs = get_func_arg_info(tuple,
&argtypes, &argnames, &argmodes);
for (i = 0; i < numargs; i++)
{
if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO)
{
if (!IsPolymorphicType(argtypes[i]))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("PL/pgSQL functions cannot accept type %s",
format_type_be(argtypes[i]))));
}
}
/* Postpone body checks if !check_function_bodies */
if (check_function_bodies)
{
FunctionCallInfoData fake_fcinfo;
FmgrInfo flinfo;
TriggerData trigdata;
int rc;
/*
* Connect to SPI manager (is this needed for compilation?)
*/
if ((rc = SPI_connect()) != SPI_OK_CONNECT)
elog(ERROR, "SPI_connect failed: %s", SPI_result_code_string(rc));
/*
* Set up a fake fcinfo with just enough info to satisfy
* plpgsql_compile().
*/
MemSet(&fake_fcinfo, 0, sizeof(fake_fcinfo));
MemSet(&flinfo, 0, sizeof(flinfo));
fake_fcinfo.flinfo = &flinfo;
flinfo.fn_oid = funcoid;
flinfo.fn_mcxt = CurrentMemoryContext;
if (istrigger)
{
MemSet(&trigdata, 0, sizeof(trigdata));
trigdata.type = T_TriggerData;
fake_fcinfo.context = (Node *) &trigdata;
}
/* Test-compile the function */
plpgsql_compile(&fake_fcinfo, true);
/*
* Disconnect from SPI manager
*/
if ((rc = SPI_finish()) != SPI_OK_FINISH)
elog(ERROR, "SPI_finish failed: %s", SPI_result_code_string(rc));
}
ReleaseSysCache(tuple);
PG_RETURN_VOID();
}
/*
* internal_get_result_type -- workhorse code implementing all the above
*
* funcid must always be supplied. call_expr and rsinfo can be NULL if not
* available. We will return TYPEFUNC_RECORD, and store NULL into
* *resultTupleDesc, if we cannot deduce the complete result rowtype from
* the available information.
*/
static TypeFuncClass
internal_get_result_type(Oid funcid,
Node *call_expr,
ReturnSetInfo *rsinfo,
Oid *resultTypeId,
TupleDesc *resultTupleDesc)
{
TypeFuncClass result;
HeapTuple tp;
Form_pg_proc procform;
Oid rettype;
TupleDesc tupdesc;
/* First fetch the function's pg_proc row to inspect its rettype */
tp = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid));
if (!HeapTupleIsValid(tp))
elog(ERROR, "cache lookup failed for function %u", funcid);
procform = (Form_pg_proc) GETSTRUCT(tp);
rettype = procform->prorettype;
/* Check for OUT parameters defining a RECORD result */
tupdesc = build_function_result_tupdesc_t(tp);
if (tupdesc)
{
/*
* It has OUT parameters, so it's basically like a regular composite
* type, except we have to be able to resolve any polymorphic OUT
* parameters.
*/
if (resultTypeId)
*resultTypeId = rettype;
if (resolve_polymorphic_tupdesc(tupdesc,
&procform->proargtypes,
call_expr))
{
if (tupdesc->tdtypeid == RECORDOID &&
tupdesc->tdtypmod < 0)
assign_record_type_typmod(tupdesc);
if (resultTupleDesc)
*resultTupleDesc = tupdesc;
result = TYPEFUNC_COMPOSITE;
}
else
{
if (resultTupleDesc)
*resultTupleDesc = NULL;
result = TYPEFUNC_RECORD;
}
ReleaseSysCache(tp);
return result;
}
/*
* If scalar polymorphic result, try to resolve it.
*/
if (IsPolymorphicType(rettype))
{
Oid newrettype = exprType(call_expr);
if (newrettype == InvalidOid) /* this probably should not happen */
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("could not determine actual result type for function \"%s\" declared to return type %s",
NameStr(procform->proname),
format_type_be(rettype))));
rettype = newrettype;
}
if (resultTypeId)
*resultTypeId = rettype;
if (resultTupleDesc)
*resultTupleDesc = NULL; /* default result */
/* Classify the result type */
result = get_type_func_class(rettype);
switch (result)
{
case TYPEFUNC_COMPOSITE:
if (resultTupleDesc)
*resultTupleDesc = lookup_rowtype_tupdesc_copy(rettype, -1);
/* Named composite types can't have any polymorphic columns */
break;
case TYPEFUNC_SCALAR:
break;
case TYPEFUNC_RECORD:
/* We must get the tupledesc from call context */
if (rsinfo && IsA(rsinfo, ReturnSetInfo) &&
rsinfo->expectedDesc != NULL)
{
result = TYPEFUNC_COMPOSITE;
if (resultTupleDesc)
*resultTupleDesc = rsinfo->expectedDesc;
/* Assume no polymorphic columns here, either */
}
break;
default:
break;
}
ReleaseSysCache(tp);
return result;
}
/*
* AggregateCreate
*/
void
AggregateCreate(const char *aggName,
Oid aggNamespace,
Oid *aggArgTypes,
int numArgs,
List *aggtransfnName,
List *aggfinalfnName,
List *aggsortopName,
Oid aggTransType,
const char *agginitval)
{
Relation aggdesc;
HeapTuple tup;
bool nulls[Natts_pg_aggregate];
Datum values[Natts_pg_aggregate];
Form_pg_proc proc;
Oid transfn;
Oid finalfn = InvalidOid; /* can be omitted */
Oid sortop = InvalidOid; /* can be omitted */
bool hasPolyArg;
bool hasInternalArg;
Oid rettype;
Oid finaltype;
Oid *fnArgs;
int nargs_transfn;
Oid procOid;
TupleDesc tupDesc;
int i;
ObjectAddress myself,
referenced;
/* sanity checks (caller should have caught these) */
if (!aggName)
elog(ERROR, "no aggregate name supplied");
if (!aggtransfnName)
elog(ERROR, "aggregate must have a transition function");
/* check for polymorphic and INTERNAL arguments */
hasPolyArg = false;
hasInternalArg = false;
for (i = 0; i < numArgs; i++)
{
if (IsPolymorphicType(aggArgTypes[i]))
hasPolyArg = true;
else if (aggArgTypes[i] == INTERNALOID)
hasInternalArg = true;
}
/*
* If transtype is polymorphic, must have polymorphic argument also; else
* we will have no way to deduce the actual transtype.
*/
if (IsPolymorphicType(aggTransType) && !hasPolyArg)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("cannot determine transition data type"),
errdetail("An aggregate using a polymorphic transition type must have at least one polymorphic argument.")));
/* find the transfn */
nargs_transfn = numArgs + 1;
fnArgs = (Oid *) palloc(nargs_transfn * sizeof(Oid));
fnArgs[0] = aggTransType;
memcpy(fnArgs + 1, aggArgTypes, numArgs * sizeof(Oid));
transfn = lookup_agg_function(aggtransfnName, nargs_transfn, fnArgs,
&rettype);
/*
* Return type of transfn (possibly after refinement by
* enforce_generic_type_consistency, if transtype isn't polymorphic) must
* exactly match declared transtype.
*
* In the non-polymorphic-transtype case, it might be okay to allow a
* rettype that's binary-coercible to transtype, but I'm not quite
* convinced that it's either safe or useful. When transtype is
* polymorphic we *must* demand exact equality.
*/
if (rettype != aggTransType)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("return type of transition function %s is not %s",
NameListToString(aggtransfnName),
format_type_be(aggTransType))));
tup = SearchSysCache(PROCOID,
ObjectIdGetDatum(transfn),
0, 0, 0);
if (!HeapTupleIsValid(tup))
elog(ERROR, "cache lookup failed for function %u", transfn);
proc = (Form_pg_proc) GETSTRUCT(tup);
/*
* If the transfn is strict and the initval is NULL, make sure first input
* type and transtype are the same (or at least binary-compatible), so
* that it's OK to use the first input value as the initial transValue.
*/
if (proc->proisstrict && agginitval == NULL)
{
if (numArgs < 1 ||
!IsBinaryCoercible(aggArgTypes[0], aggTransType))
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("must not omit initial value when transition function is strict and transition type is not compatible with input type")));
}
ReleaseSysCache(tup);
/* handle finalfn, if supplied */
if (aggfinalfnName)
{
fnArgs[0] = aggTransType;
finalfn = lookup_agg_function(aggfinalfnName, 1, fnArgs,
&finaltype);
}
else
{
/*
* If no finalfn, aggregate result type is type of the state value
*/
finaltype = aggTransType;
}
Assert(OidIsValid(finaltype));
/*
* If finaltype (i.e. aggregate return type) is polymorphic, inputs must
* be polymorphic also, else parser will fail to deduce result type.
* (Note: given the previous test on transtype and inputs, this cannot
* happen, unless someone has snuck a finalfn definition into the catalogs
* that itself violates the rule against polymorphic result with no
* polymorphic input.)
*/
if (IsPolymorphicType(finaltype) && !hasPolyArg)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("cannot determine result data type"),
errdetail("An aggregate returning a polymorphic type "
"must have at least one polymorphic argument.")));
/*
* Also, the return type can't be INTERNAL unless there's at least one
* INTERNAL argument. This is the same type-safety restriction we enforce
* for regular functions, but at the level of aggregates. We must test
* this explicitly because we allow INTERNAL as the transtype.
*/
if (finaltype == INTERNALOID && !hasInternalArg)
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.")));
/* handle sortop, if supplied */
if (aggsortopName)
{
if (numArgs != 1)
ereport(ERROR,
(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
errmsg("sort operator can only be specified for single-argument aggregates")));
sortop = LookupOperName(NULL, aggsortopName,
aggArgTypes[0], aggArgTypes[0],
false, -1);
}
/*
* Everything looks okay. Try to create the pg_proc entry for the
* aggregate. (This could fail if there's already a conflicting entry.)
*/
procOid = ProcedureCreate(aggName,
aggNamespace,
false, /* no replacement */
false, /* doesn't return a set */
finaltype, /* returnType */
INTERNALlanguageId, /* languageObjectId */
InvalidOid, /* no validator */
"aggregate_dummy", /* placeholder proc */
NULL, /* probin */
true, /* isAgg */
false, /* isWindowFunc */
false, /* security invoker (currently not
* definable for agg) */
false, /* isStrict (not needed for agg) */
PROVOLATILE_IMMUTABLE, /* volatility (not
* needed for agg) */
buildoidvector(aggArgTypes,
numArgs), /* paramTypes */
PointerGetDatum(NULL), /* allParamTypes */
PointerGetDatum(NULL), /* parameterModes */
PointerGetDatum(NULL), /* parameterNames */
NIL, /* parameterDefaults */
PointerGetDatum(NULL), /* proconfig */
1, /* procost */
0); /* prorows */
/*
* Okay to create the pg_aggregate entry.
*/
/* initialize nulls and values */
for (i = 0; i < Natts_pg_aggregate; i++)
{
nulls[i] = false;
values[i] = (Datum) NULL;
}
values[Anum_pg_aggregate_aggfnoid - 1] = ObjectIdGetDatum(procOid);
values[Anum_pg_aggregate_aggtransfn - 1] = ObjectIdGetDatum(transfn);
values[Anum_pg_aggregate_aggfinalfn - 1] = ObjectIdGetDatum(finalfn);
values[Anum_pg_aggregate_aggsortop - 1] = ObjectIdGetDatum(sortop);
values[Anum_pg_aggregate_aggtranstype - 1] = ObjectIdGetDatum(aggTransType);
if (agginitval)
values[Anum_pg_aggregate_agginitval - 1] = CStringGetTextDatum(agginitval);
else
nulls[Anum_pg_aggregate_agginitval - 1] = true;
aggdesc = heap_open(AggregateRelationId, RowExclusiveLock);
tupDesc = aggdesc->rd_att;
tup = heap_form_tuple(tupDesc, values, nulls);
simple_heap_insert(aggdesc, tup);
CatalogUpdateIndexes(aggdesc, tup);
heap_close(aggdesc, RowExclusiveLock);
/*
* Create dependencies for the aggregate (above and beyond those already
* made by ProcedureCreate). Note: we don't need an explicit dependency
* on aggTransType since we depend on it indirectly through transfn.
*/
myself.classId = ProcedureRelationId;
myself.objectId = procOid;
myself.objectSubId = 0;
/* Depends on transition function */
referenced.classId = ProcedureRelationId;
referenced.objectId = transfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
/* Depends on final function, if any */
if (OidIsValid(finalfn))
{
referenced.classId = ProcedureRelationId;
referenced.objectId = finalfn;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
/* Depends on sort operator, if any */
if (OidIsValid(sortop))
{
referenced.classId = OperatorRelationId;
referenced.objectId = sortop;
referenced.objectSubId = 0;
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
}
}
/*
* lookup_agg_function -- common code for finding both transfn and finalfn
*/
static Oid
lookup_agg_function(List *fnName,
int nargs,
Oid *input_types,
Oid *rettype)
{
Oid fnOid;
bool retset;
int nvargs;
Oid *true_oid_array;
FuncDetailCode fdresult;
AclResult aclresult;
int i;
/*
* func_get_detail looks up the function in the catalogs, does
* disambiguation for polymorphic functions, handles inheritance, and
* returns the funcid and type and set or singleton status of the
* function's return value. it also returns the true argument types to
* the function.
*/
fdresult = func_get_detail(fnName, NIL, nargs, input_types, false, false,
&fnOid, rettype, &retset, &nvargs,
&true_oid_array, NULL);
/* only valid case is a normal function not returning a set */
if (fdresult != FUNCDETAIL_NORMAL || !OidIsValid(fnOid))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_FUNCTION),
errmsg("function %s does not exist",
func_signature_string(fnName, nargs, input_types))));
if (retset)
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("function %s returns a set",
func_signature_string(fnName, nargs, input_types))));
/*
* If there are any polymorphic types involved, enforce consistency, and
* possibly refine the result type. It's OK if the result is still
* polymorphic at this point, though.
*/
*rettype = enforce_generic_type_consistency(input_types,
true_oid_array,
nargs,
*rettype,
true);
/*
* func_get_detail will find functions requiring run-time argument type
* coercion, but nodeAgg.c isn't prepared to deal with that
*/
for (i = 0; i < nargs; i++)
{
if (!IsPolymorphicType(true_oid_array[i]) &&
!IsBinaryCoercible(input_types[i], true_oid_array[i]))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("function %s requires run-time type coercion",
func_signature_string(fnName, nargs, true_oid_array))));
}
/* Check aggregate creator has permission to call the function */
aclresult = pg_proc_aclcheck(fnOid, GetUserId(), ACL_EXECUTE);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_PROC, get_func_name(fnOid));
return fnOid;
}
/* ----------------------------------------------------------------
* 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);
}
}
