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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX SQL_EXE
#include "sql/executor/ob_executor.h"
#include "lib/stat/ob_diagnose_info.h"
#include "sql/executor/ob_remote_scheduler.h"
#include "sql/executor/ob_task_executor_ctx.h"
#include "sql/executor/ob_execute_result.h"
#include "sql/executor/ob_task_spliter.h"
#include "sql/engine/ob_physical_plan.h"
#include "sql/engine/ob_physical_plan_ctx.h"
#include "sql/session/ob_sql_session_info.h"
#include "sql/engine/ob_exec_context.h"
#include "sql/engine/ob_operator.h"
#include "lib/profile/ob_perf_event.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
int ObExecutor::init(ObPhysicalPlan *plan)
{
int ret = OB_SUCCESS;
if (true == inited_) {
ret = OB_INIT_TWICE;
LOG_WARN("executor is inited twice", K(ret));
} else if (OB_ISNULL(plan)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("plan is NULL", K(ret));
} else {
phy_plan_ = plan;
inited_ = true;
}
return ret;
}
void ObExecutor::reset()
{
inited_ = false;
phy_plan_ = NULL;
execution_id_ = OB_INVALID_ID;
}
int ObExecutor::execute_plan(ObExecContext &ctx)
{
NG_TRACE(exec_plan_begin);
int ret = OB_SUCCESS;
ObTaskExecutorCtx &task_exec_ctx = ctx.get_task_exec_ctx();
ObExecuteResult &exec_result = task_exec_ctx.get_execute_result();
ObSQLSessionInfo *session_info = ctx.get_my_session();
ObPhysicalPlanCtx *plan_ctx = ctx.get_physical_plan_ctx();
int64_t batched_stmt_cnt = ctx.get_sql_ctx()->multi_stmt_item_.get_batched_stmt_cnt();
ctx.set_use_temp_expr_ctx_cache(true);
// If the batch execution is rewritten by insert multi values, there is no need to repack multiple times
if (ctx.get_sql_ctx()->is_do_insert_batch_opt()) {
batched_stmt_cnt = 0;
}
if (OB_UNLIKELY(!inited_)) {
ret = OB_NOT_INIT;
LOG_WARN("not inited", K(ret));
} else if (OB_ISNULL(session_info)) {
ret = OB_NOT_INIT;
LOG_WARN("session info is NULL", K(ret));
} else if (OB_ISNULL(phy_plan_)) {
ret = OB_NOT_INIT;
LOG_WARN("phy_plan_ is NULL", K(ret));
} else if (OB_FAIL(session_info->set_cur_phy_plan(phy_plan_))) {
LOG_WARN("set extra serialize vars", K(ret));
} else if (OB_FAIL(phy_plan_->get_expr_frame_info()
.pre_alloc_exec_memory(ctx))) {
LOG_WARN("fail to pre allocate memory", K(ret), K(phy_plan_->get_expr_frame_info()));
} else if (batched_stmt_cnt > 0
&& OB_FAIL(plan_ctx->create_implicit_cursor_infos(batched_stmt_cnt))) {
LOG_WARN("create implicit cursor infos failed", K(ret), K(batched_stmt_cnt));
} else {
ObPhyPlanType execute_type = phy_plan_->get_plan_type();
// 特殊处理如下case：
// MULTI PART INSERT (remote)
// SELECT (local)
// 这样的计划在优化器生成阶段，plan type是OB_PHY_PLAN_DISTRIBUTED，
// 但是需要使用local的方式进行执行调度
if (execute_type != OB_PHY_PLAN_LOCAL && phy_plan_->is_require_local_execution()) {
execute_type = OB_PHY_PLAN_LOCAL;
LOG_TRACE("change the plan execution type",
"fact", execute_type, K(phy_plan_->get_plan_type()));
}
switch (execute_type) {
case OB_PHY_PLAN_LOCAL: {
EVENT_INC(SQL_LOCAL_COUNT);
ObOperator *op = NULL;
if (OB_FAIL(phy_plan_->get_root_op_spec()->create_operator(ctx, op))) {
LOG_WARN("create operator from spec failed", K(ret));
} else if (OB_ISNULL(op)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("created operator is NULL", K(ret));
} else {
exec_result.set_static_engine_root(op);
}
break;
}
case OB_PHY_PLAN_REMOTE:
EVENT_INC(SQL_REMOTE_COUNT);
ret = execute_remote_single_partition_plan(ctx);
break;
case OB_PHY_PLAN_DISTRIBUTED:
EVENT_INC(SQL_DISTRIBUTED_COUNT);
// PX 特殊路径
// PX 模式下，调度工作由 ObPxCoord 算子负责
ret = execute_static_cg_px_plan(ctx);
break;
default:
ret = OB_ERR_UNEXPECTED;
break;
}
}
NG_TRACE(exec_plan_end);
return ret;
}
int ObExecutor::execute_remote_single_partition_plan(ObExecContext &ctx)
{
ObRemoteScheduler scheduler;
return scheduler.schedule(ctx, phy_plan_);
}
int ObExecutor::execute_static_cg_px_plan(ObExecContext &ctx)
{
int ret = OB_SUCCESS;
ObOperator *op = NULL;
if (OB_FAIL(phy_plan_->get_root_op_spec()->create_op_input(ctx))) {
LOG_WARN("create input from spec failed", K(ret));
} else if (OB_FAIL(phy_plan_->get_root_op_spec()->create_operator(ctx, op))) {
LOG_WARN("create operator from spec failed", K(ret));
} else if (OB_ISNULL(op)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("created operator is NULL", K(ret));
} else {
ctx.get_task_executor_ctx()
->get_execute_result()
.set_static_engine_root(op);
}
return ret;
}
int ObExecutor::close(ObExecContext &ctx)
{
// close函数要设计成不管什么时候调都可以，因此不管inited_的值
int ret = OB_SUCCESS;
ObSQLSessionInfo *session_info = ctx.get_my_session();
if (OB_LIKELY(NULL != session_info)) {
//将session中的cur_phy_plan_重置为NULL
session_info->reset_cur_phy_plan_to_null();
}
return ret;
}