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Add mutex in FunctionFactory

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This commit is contained in:
ANDREI STAROVEROV 2021-07-04 00:47:43 +03:00
parent a640ea1f2c
commit b277d4db91
2 changed files with 18 additions and 10 deletions
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14
src/Functions/FunctionFactory.cpp
View File

@ -1,4 +1,3 @@
#include <AggregateFunctions/AggregateFunctionFactory.h>
#include <Functions/FunctionFactory.h>
#include <Functions/UserDefinedFunction.h>
@ -32,11 +31,12 @@ const String & getFunctionCanonicalNameIfAny(const String & name)
return FunctionFactory::instance().getCanonicalNameIfAny(name);
}
void FunctionFactory::registerFunction(const
std::string & name,
void FunctionFactory::registerFunction(
const std::string & name,
Value creator,
CaseSensitiveness case_sensitiveness)
{
std::lock_guard<std::mutex> guard(mutex);
if (!functions.emplace(name, creator).second)
throw Exception("FunctionFactory: the function name '" + name + "' is not unique",
ErrorCodes::LOGICAL_ERROR);
@ -79,6 +79,7 @@ FunctionOverloadResolverPtr FunctionFactory::getImpl(
std::vector<std::string> FunctionFactory::getAllNames() const
{
std::lock_guard<std::mutex> guard(mutex);
std::vector<std::string> res;
res.reserve(functions.size());
for (const auto & func : functions)
@ -97,6 +98,7 @@ FunctionOverloadResolverPtr FunctionFactory::tryGetImpl(
const std::string & name_param,
ContextConstPtr context) const
{
std::lock_guard<std::mutex> guard(mutex);
String name = getAliasToOrName(name_param);
FunctionOverloadResolverPtr res;
@ -146,6 +148,10 @@ void FunctionFactory::registerUserDefinedFunction(const ASTCreateFunctionQuery &
if (AggregateFunctionFactory::instance().isAggregateFunctionName(create_function_query.function_name))
throw Exception(ErrorCodes::FUNCTION_ALREADY_EXISTS, "The aggregate function {} already exists", create_function_query.function_name);
{
std::lock_guard<std::mutex> guard(mutex);
user_defined_functions.insert(create_function_query.function_name);
}
registerFunction(create_function_query.function_name, [create_function_query](ContextPtr context)
{
auto function = UserDefinedFunction::create(context);
@ -155,11 +161,11 @@ void FunctionFactory::registerUserDefinedFunction(const ASTCreateFunctionQuery &
FunctionOverloadResolverPtr res = std::make_unique<FunctionToOverloadResolverAdaptor>(function);
return res;
}, CaseSensitiveness::CaseSensitive);
user_defined_functions.insert(create_function_query.function_name);
}
void FunctionFactory::unregisterUserDefinedFunction(const String & name)
{
std::lock_guard<std::mutex> guard(mutex);
if (functions.contains(name))
{
if (user_defined_functions.contains(name))

14
src/Functions/FunctionFactory.h
View File

@ -8,6 +8,7 @@
#include <functional>
#include <memory>
#include <mutex>
#include <string>
#include <unordered_map>
@ -20,7 +21,7 @@ namespace DB
* some dictionaries from Context.
*/
class FunctionFactory : private boost::noncopyable,
public IFactoryWithAliases<std::function<FunctionOverloadResolverPtr(ContextPtr)>>
public IFactoryWithAliases<std::function<FunctionOverloadResolverPtr(ContextConstPtr)>>
{
public:
static FunctionFactory & instance();
@ -49,14 +50,14 @@ public:
std::vector<std::string> getAllNames() const;
/// Throws an exception if not found.
FunctionOverloadResolverPtr get(const std::string & name, ContextPtr context) const;
FunctionOverloadResolverPtr get(const std::string & name, ContextConstPtr context) const;
/// Returns nullptr if not found.
FunctionOverloadResolverPtr tryGet(const std::string & name, ContextPtr context) const;
FunctionOverloadResolverPtr tryGet(const std::string & name, ContextConstPtr context) const;
/// The same methods to get developer interface implementation.
FunctionOverloadResolverPtr getImpl(const std::string & name, ContextPtr context) const;
FunctionOverloadResolverPtr tryGetImpl(const std::string & name, ContextPtr context) const;
FunctionOverloadResolverPtr getImpl(const std::string & name, ContextConstPtr context) const;
FunctionOverloadResolverPtr tryGetImpl(const std::string & name, ContextConstPtr context) const;
/// Register a function by its name.
/// No locking, you must register all functions before usage of get.
@ -71,9 +72,10 @@ private:
Functions functions;
std::unordered_set<String> user_defined_functions;
Functions case_insensitive_functions;
mutable std::mutex mutex;
template <typename Function>
static FunctionOverloadResolverPtr adaptFunctionToOverloadResolver(ContextPtr context)
static FunctionOverloadResolverPtr adaptFunctionToOverloadResolver(ContextConstPtr context)
{
return std::make_unique<FunctionToOverloadResolverAdaptor>(Function::create(context));
}