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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_execute_result.h"
#include "lib/ash/ob_active_session_guard.h"
#include "sql/engine/ob_operator.h"
#include "sql/engine/ob_exec_context.h"
using namespace oceanbase::common;
namespace oceanbase
{
namespace sql
{
int ObExecuteResult::open(ObExecContext &ctx)
{
int ret = OB_SUCCESS;
UNUSED(ctx);
ret = open();
return ret;
}
int ObExecuteResult::get_next_row(ObExecContext &ctx, const common::ObNewRow *&row)
{
int ret = OB_SUCCESS;
row = &row_;
const ObOpSpec &spec = static_engine_root_->get_spec();
if (spec.output_.count() > 0 && NULL == row_.cells_) {
if (OB_ISNULL(row_.cells_ = static_cast<ObObj *>(
ctx.get_allocator().alloc(sizeof(ObObj) * spec.output_.count())))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("allocate memory failed", K(ret));
} else {
for (int64_t i = 0; i < spec.output_.count(); i++) {
new (&row_.cells_[i]) ObObj();
}
row_.count_ = spec.output_.count();
row_.projector_size_ = 0;
row_.projector_ = NULL;
}
}
if (OB_FAIL(ret)) {
} else if (!spec.is_vectorized()) {
ret = get_next_row();
// convert datum to obj
if (OB_SUCC(ret)) {
for (int64_t i = 0; OB_SUCC(ret) && i < spec.output_.count(); i++) {
ObDatum *datum = NULL;
ObExpr *expr = spec.output_.at(i);
if (OB_FAIL(expr->eval(static_engine_root_->get_eval_ctx(), datum))) {
LOG_WARN("expr evaluate failed", K(ret));
} else if (OB_FAIL(datum->to_obj(
row_.cells_[i], expr->obj_meta_, expr->obj_datum_map_))) {
LOG_WARN("convert datum to obj failed", K(ret));
}
}
}
} else {
ret = br_it_.get_next_row();
if (OB_SUCC(ret)) {
const int64_t idx = br_it_.cur_idx();
for (int64_t i = 0; OB_SUCC(ret) && i < spec.output_.count(); i++) {
ObExpr *expr = spec.output_.at(i);
// expressions are evaluated in get_next_batch(), get datum value directly
const ObDatum *datum = expr->locate_batch_datums(
static_engine_root_->get_eval_ctx()) + (expr->is_batch_result() ? idx : 0);
if (OB_FAIL(datum->to_obj(
row_.cells_[i], expr->obj_meta_, expr->obj_datum_map_))) {
LOG_WARN("convert datum to obj failed", K(ret));
}
}
}
}
return ret;
}
int ObExecuteResult::close(ObExecContext &ctx)
{
int ret = OB_SUCCESS;
UNUSED(ctx);
ret = close();
return ret;
}
int ObExecuteResult::open() const
{
int ret = OB_SUCCESS;
if (OB_ISNULL(static_engine_root_)) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else if (OB_FAIL(static_engine_root_->open())) {
if (OB_TRY_LOCK_ROW_CONFLICT != ret && OB_TRANSACTION_SET_VIOLATION != ret) {
LOG_WARN("open operator failed", K(ret));
}
} else if (!static_engine_root_->get_spec().plan_->var_init_exprs_.empty()) {
// Evaluate the var init expr in generated table, This is to be compatible with some of mysql's uses of variables
// Such as "select c1,(@rownum:= @rownum+1) as CCBH from t1,(SELECT@rownum:=0) B"
const ExprFixedArray &var_init_exprs = static_engine_root_->get_spec().plan_->var_init_exprs_;
for (int64_t i = 0; OB_SUCC(ret) && i < var_init_exprs.count(); i++) {
ObDatum *datum = NULL;
ObExpr *expr = var_init_exprs.at(i);
if (OB_FAIL(expr->eval(static_engine_root_->get_eval_ctx(), datum))) {
LOG_WARN("expr evaluate failed", K(ret));
}
}
}
return ret;
}
int ObExecuteResult::get_next_row() const
{
int ret = OB_SUCCESS;
bool got_row = false;
if (OB_ISNULL(static_engine_root_)) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret), KP(static_engine_root_));
}
// switch bind array iterator in DML returning plan
while (OB_SUCC(ret) && !got_row) {
if (OB_FAIL(static_engine_root_->get_next_row())) {
if (OB_ITER_END == ret) {
ObPhysicalPlanCtx *plan_ctx = static_engine_root_->get_exec_ctx().get_physical_plan_ctx();
if (plan_ctx->get_bind_array_count() <= 0
|| plan_ctx->get_bind_array_idx() >= plan_ctx->get_bind_array_count()) {
// no bind array or reach binding array end, do nothing
} else {
plan_ctx->inc_bind_array_idx();
if (OB_FAIL(static_engine_root_->switch_iterator())) {
if (OB_ITER_END != ret) {
LOG_WARN("switch op iterator failed",
K(ret), "op_type", static_engine_root_->op_name());
}
}
}
} else if (OB_TRY_LOCK_ROW_CONFLICT != ret) {
LOG_WARN("get next row from operator failed", K(ret));
}
} else {
got_row = true;
}
}
return ret;
}
int ObExecuteResult::close() const
{
int ret = OB_SUCCESS;
if (NULL != static_engine_root_) {
if (OB_FAIL(static_engine_root_->close())) {
LOG_WARN("close failed", K(ret));
}
}
return ret;
}
ObAsyncExecuteResult::ObAsyncExecuteResult()
: field_count_(0),
scanner_(nullptr),
cur_row_(nullptr),
spec_(nullptr)
{
}
int ObAsyncExecuteResult::open(ObExecContext &ctx)
{
int ret = OB_SUCCESS;
ObPhysicalPlanCtx *plan_ctx = ctx.get_physical_plan_ctx();
ObSQLSessionInfo *session = ctx.get_my_session();
if (OB_ISNULL(scanner_) || OB_ISNULL(plan_ctx) || OB_ISNULL(session)) {
ret = OB_NOT_INIT;
LOG_WARN("scanner is invalid", K(ret), K(scanner_), K(plan_ctx), K(session));
} else if (OB_FAIL(ObTaskExecutorCtxUtil::merge_task_result_meta(*plan_ctx, *scanner_))) {
LOG_WARN("merge task result meta failed", K(ret), KPC_(scanner));
} else if (OB_FAIL(session->replace_user_variables(ctx, scanner_->get_session_var_map()))) {
LOG_WARN("replace user variables failed", K(ret));
} else if (field_count_ <= 0) {
//远端没有数据返回，因此不需要创建row buffer
} else if (OB_FAIL(ob_create_row(ctx.get_allocator(), field_count_, cur_row_))) {
LOG_WARN("create current row failed", K(ret), K(field_count_));
} else {
if (nullptr == spec_) {
row_iter_ = scanner_->begin();
} else {
if (OB_FAIL(scanner_->get_datum_store().begin(datum_iter_))) {
LOG_WARN("fail to init datum iter", K(ret));
}
}
}
return ret;
}
int ObAsyncExecuteResult::get_next_row(ObExecContext &ctx, const ObNewRow *&row)
{
UNUSED(ctx);
int ret = OB_SUCCESS;
if (field_count_ <= 0) {
ret = OB_ITER_END;
} else if (OB_ISNULL(cur_row_)) {
ret = OB_NOT_INIT;
LOG_WARN("scanner is invalid", K(ret));
} else if (nullptr == spec_) {
if (OB_FAIL(row_iter_.get_next_row(*cur_row_))) {
if (OB_ITER_END != ret) {
LOG_WARN("get next row from row iterator failed", K(ret));
}
}
} else {
// Static engine.
// For async execute result, ObExecContext::eval_ctx_ is destroyed, can not be used.
const ObChunkDatumStore::StoredRow *sr = NULL;
if (OB_FAIL(datum_iter_.get_next_row(sr))) {
if (OB_ITER_END != ret) {
LOG_WARN("get next row from datum iterator failed", K(ret));
}
} else if (OB_ISNULL(sr) || spec_->output_.count() != sr->cnt_) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("store row is NULL or datum count mismatch",
K(ret), KP(sr), K(spec_->output_.count()));
} else {
for (int64_t i = 0; OB_SUCC(ret) && i < spec_->output_.count(); i++) {
const sql::ObExpr *e = spec_->output_.at(i);
if (OB_FAIL(sr->cells()[i].to_obj(cur_row_->cells_[i],
e->obj_meta_,
e->obj_datum_map_))) {
LOG_WARN("convert datum to obj failed", K(ret));
}
}
}
}
if (OB_SUCC(ret)) {
row = cur_row_;
}
return ret;
}
int ObAsyncExecuteResult::close(ObExecContext &ctx)
{
UNUSED(ctx);
return common::OB_SUCCESS;
}
}/* ns sql*/
}/* ns oceanbase */