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282 lines (255 loc) · 9.45 KB
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/*
* Copyright (c) 2025 OceanBase.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef OCEANBASE_SQL_PLAN_CACHE_OB_PS_CACHE_CALLBACK_H_
#define OCEANBASE_SQL_PLAN_CACHE_OB_PS_CACHE_CALLBACK_H_
#include "lib/utility/ob_macro_utils.h"
#include "sql/plan_cache/ob_pcv_set.h"
#include "sql/plan_cache/ob_prepare_stmt_struct.h"
namespace oceanbase
{
namespace sql
{
class ObPCVSet;
class ObGetClosedStmtIdOp
{
public:
ObGetClosedStmtIdOp(common::ObIArray< std::pair<ObPsStmtId, int64_t> > *expired_ps,
common::ObIArray< std::pair<ObPsStmtId, int64_t> > *closed_ps)
: closed_ps_(closed_ps),
expired_ps_(expired_ps),
used_size_(0),
callback_ret_(OB_SUCCESS)
{
}
// ref_count is 1 indicates that all sessions do not depend on the objects in the current cache;
int operator()(common::hash::HashMapPair<ObPsStmtId, ObPsStmtInfo*> &entry)
{
int &ret = callback_ret_;
if (OB_ISNULL(closed_ps_) || OB_ISNULL(expired_ps_)) {
callback_ret_ = common::OB_NOT_INIT;
SQL_PC_LOG(WARN, "key_array not inited", K(callback_ret_));
} else if (OB_ISNULL(entry.second)) {
callback_ret_ = common::OB_INVALID_ARGUMENT;
SQL_PC_LOG(WARN, "ps session info is null", KP(entry.second), K_(callback_ret));
} else if (1 == entry.second->get_ref_count()) {
std::pair<ObPsStmtId, int64_t> id_time;
id_time.first = entry.first;
id_time.second = entry.second->get_last_closed_timestamp();
if (entry.second->is_expired()) {
// for expired ps info, only evicted once;
// use cas, because auto cache evict and flush ps cache may concurrent processing
if (ATOMIC_BCAS(entry.second->get_is_expired_evicted_ptr(), false, true)) {
if (OB_SUCCESS != (callback_ret_ = expired_ps_->push_back(id_time))) {
SQL_PC_LOG(WARN, "fail to push back key", K_(callback_ret));
}
}
} else {
if (OB_SUCCESS != (callback_ret_ = closed_ps_->push_back(id_time))) {
SQL_PC_LOG(WARN, "fail to push back key", K_(callback_ret));
} else {
used_size_ += entry.second->get_item_and_info_size();
}
}
}
// The Story Behind Return Code:
// We change the interface for this because of supporting that iterations encounter an error
// to return immediately, yet for all the existing logics there, they don't care the return
// code and wants to continue iteration anyway. So to keep the old behavior and makes everyone
// else happy, we have to return OB_SUCCESS here. And we only make this return code thing
// affects the behavior in tenant meta manager washing tablet. If you want to change the
// behavior in such places, please consult the individual file owners to fully understand the
// needs there.
return common::OB_SUCCESS;
}
int get_callback_ret() { return callback_ret_; }
int64_t get_used_size() { return used_size_; }
private:
common::ObIArray< std::pair<ObPsStmtId, int64_t> > *closed_ps_;
common::ObIArray< std::pair<ObPsStmtId, int64_t> > *expired_ps_;
int64_t used_size_;
int callback_ret_;
DISALLOW_COPY_AND_ASSIGN(ObGetClosedStmtIdOp);
};
class ObGetAllStmtIdOp
{
public:
explicit ObGetAllStmtIdOp(common::ObIArray<ObPsStmtId> *key_array)
: key_array_(key_array),
callback_ret_(OB_SUCCESS)
{
}
int operator()(common::hash::HashMapPair<ObPsStmtId, ObPsStmtInfo*> &entry)
{
int callback_ret_ = common::OB_SUCCESS;
if (OB_ISNULL(key_array_)) {
callback_ret_ = common::OB_NOT_INIT;
SQL_PC_LOG_RET(WARN, callback_ret_, "key_array not inited", K(callback_ret_));
} else if (OB_SUCCESS != (callback_ret_ = key_array_->push_back(entry.first))) {
SQL_PC_LOG_RET(WARN, callback_ret_, "fail to push back key", K(callback_ret_));
}
// The Story Behind Return Code:
// We change the interface for this because of supporting that iterations encounter an error
// to return immediately, yet for all the existing logics there, they don't care the return
// code and wants to continue iteration anyway. So to keep the old behavior and makes everyone
// else happy, we have to return OB_SUCCESS here. And we only make this return code thing
// affects the behavior in tenant meta manager washing tablet. If you want to change the
// behavior in such places, please consult the individual file owners to fully understand the
// needs there.
return common::OB_SUCCESS;
}
int get_callback_ret() { return callback_ret_; }
private:
common::ObIArray<ObPsStmtId> *key_array_;
int callback_ret_;
DISALLOW_COPY_AND_ASSIGN(ObGetAllStmtIdOp);
};
class ObPsStmtItemRefAtomicOp
{
typedef common::hash::HashMapPair<ObPsSqlKey, ObPsStmtItem *> PsStmtIdKV;
public:
ObPsStmtItemRefAtomicOp(): stmt_item_(NULL), callback_ret_(common::OB_SUCCESS){}
virtual ~ObPsStmtItemRefAtomicOp() {}
virtual int get_value(ObPsStmtItem *&ps_item);
void operator()(const PsStmtIdKV &entry);
inline int get_callback_ret() const { return callback_ret_; }
private:
ObPsStmtItem *stmt_item_;
int callback_ret_;
DISALLOW_COPY_AND_ASSIGN(ObPsStmtItemRefAtomicOp);
};
class ObPsStmtItemDerefAtomicOp
{
typedef common::hash::HashMapPair<ObPsSqlKey, ObPsStmtItem *> PsStmtIdKV;
public:
ObPsStmtItemDerefAtomicOp() : ret_(common::OB_SUCCESS), is_erase_(false) {}
virtual ~ObPsStmtItemDerefAtomicOp() {}
int get_ret() const { return ret_; }
bool is_erase() const { return is_erase_; }
private:
int ret_;
bool is_erase_;
DISALLOW_COPY_AND_ASSIGN(ObPsStmtItemDerefAtomicOp);
};
class ObPsStmtItemEraseAtomicOp
{
typedef common::hash::HashMapPair<ObPsSqlKey, ObPsStmtItem *> PsStmtIdKV;
public:
ObPsStmtItemEraseAtomicOp(ObPsStmtId id)
: stmt_id_(id),
ret_(common::OB_SUCCESS),
need_erase_(false) {}
virtual ~ObPsStmtItemEraseAtomicOp() {}
void operator()(const PsStmtIdKV &entry);
int get_ret() const { return ret_; }
bool need_erase() const { return need_erase_; }
private:
ObPsStmtId stmt_id_;
int ret_;
bool need_erase_;
DISALLOW_COPY_AND_ASSIGN(ObPsStmtItemEraseAtomicOp);
};
class ObPsStmtInfoRefAtomicOp
{
typedef common::hash::HashMapPair<ObPsStmtId, ObPsStmtInfo *> PsStmtInfoKV;
public:
ObPsStmtInfoRefAtomicOp(): stmt_info_(NULL), callback_ret_(common::OB_SUCCESS) {}
virtual ~ObPsStmtInfoRefAtomicOp() {}
virtual int get_value(ObPsStmtInfo *&ps_info);
inline int get_callback_ret() const { return callback_ret_; }
void operator()(const PsStmtInfoKV &entry);
private:
ObPsStmtInfo *stmt_info_;
int callback_ret_;
DISALLOW_COPY_AND_ASSIGN(ObPsStmtInfoRefAtomicOp);
};
class ObPsStmtInfoDerefAtomicOp
{
typedef common::hash::HashMapPair<ObPsStmtId, ObPsStmtInfo *> PsStmtInfoKV;
public:
ObPsStmtInfoDerefAtomicOp() : ret_(common::OB_SUCCESS) {}
virtual ~ObPsStmtInfoDerefAtomicOp() {}
void operator()(const PsStmtInfoKV &entry);
int get_ret() const { return ret_; }
private:
int ret_;
DISALLOW_COPY_AND_ASSIGN(ObPsStmtInfoDerefAtomicOp);
};
class ObPsStmtInfoDestroyAtomicOp
{
typedef common::hash::HashMapPair<ObPsStmtId, ObPsStmtInfo *> PsStmtInfoKV;
public:
ObPsStmtInfoDestroyAtomicOp() : ret_(common::OB_SUCCESS), marked_erase_(false) {}
virtual ~ObPsStmtInfoDestroyAtomicOp() {}
void operator()(const PsStmtInfoKV &entry);
int get_ret() const { return ret_; }
bool marked_erase() const { return marked_erase_; }
private:
int ret_;
bool marked_erase_;
DISALLOW_COPY_AND_ASSIGN(ObPsStmtInfoDestroyAtomicOp);
};
class ObPsPCVSetAtomicOp
{
protected:
typedef common::hash::HashMapPair<ObPlanCacheKey, ObPCVSet *> PsPlanCacheKV;
public:
ObPsPCVSetAtomicOp(const CacheRefHandleID ref_handle)
: pcv_set_(NULL), ref_handle_(ref_handle) {}
virtual ~ObPsPCVSetAtomicOp() {}
// get pcv_set and lock
virtual int get_value(ObPCVSet *&pcv_set);
// get pcv_set and increase reference count
protected:
//when get value, need lock
virtual int lock(ObPCVSet &pcv_set) = 0;
protected:
// According to the interface of ObHashTable, all returned values will be passed
// back to the caller via the callback functor.
// pcv_set_ - the plan cache value that is referenced.
ObPCVSet *pcv_set_;
const CacheRefHandleID ref_handle_;
private:
DISALLOW_COPY_AND_ASSIGN(ObPsPCVSetAtomicOp);
};
class ObPsPCVSetWlockAndRef : public ObPsPCVSetAtomicOp
{
public:
ObPsPCVSetWlockAndRef(const CacheRefHandleID ref_handle)
: ObPsPCVSetAtomicOp(ref_handle) {}
virtual ~ObPsPCVSetWlockAndRef() {}
int lock(ObPCVSet &pcv_set)
{
return pcv_set.lock(false/*wlock*/);
};
private:
DISALLOW_COPY_AND_ASSIGN(ObPsPCVSetWlockAndRef);
};
class ObPsPCVSetRlockAndRef : public ObPsPCVSetAtomicOp
{
public:
ObPsPCVSetRlockAndRef(const CacheRefHandleID ref_handle)
: ObPsPCVSetAtomicOp(ref_handle) {}
virtual ~ObPsPCVSetRlockAndRef() {}
int lock(ObPCVSet &pcvs)
{
return pcvs.lock(true/*rlock*/);
};
private:
DISALLOW_COPY_AND_ASSIGN(ObPsPCVSetRlockAndRef);
};
} //end of namespace sql
} //end of namespace oceanbase
#endif //OCEANBASE_SQL_PLAN_CACHE_OB_PS_CACHE_CALLBACK_H_