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oceanbase-admin
2021-05-31 22:56:52 +08:00
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src/sql/resolver/tcl/ob_start_trans_resolver.cpp Normal file
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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_RESV
#include "ob_start_trans_resolver.h"
#include "sql/session/ob_sql_session_info.h"
#include "sql/ob_trans_character.h"
namespace oceanbase {
using namespace common;
using namespace share;
namespace sql {
ObStartTransResolver::ObStartTransResolver(ObResolverParams& params) : ObTCLResolver(params)
{}
ObStartTransResolver::~ObStartTransResolver()
{}
int ObStartTransResolver::resolve(const ParseNode& parse_node)
{
int ret = OB_SUCCESS;
ObStartTransStmt* start_stmt = NULL;
if (OB_UNLIKELY(T_BEGIN != parse_node.type_ || 1 != parse_node.num_child_)) {
ret = OB_ERR_UNEXPECTED;
LOG_ERROR("unexpected val", K(parse_node.type_), K(parse_node.num_child_), K(ret));
} else if (OB_UNLIKELY(NULL == (start_stmt = create_stmt<ObStartTransStmt>()))) {
ret = OB_SQL_RESOLVER_NO_MEMORY;
LOG_WARN("failed to create select stmt", K(ret));
} else {
stmt_ = start_stmt;
const uint64_t tenant_id = session_info_->get_effective_tenant_id();
const share::schema::ObSysVariableSchema* sys_variable = NULL;
if (OB_FAIL(schema_checker_->get_sys_variable_schema(tenant_id, sys_variable))) {
LOG_WARN("fail to get sys variable schema", K(tenant_id), K(ret));
} else if (OB_ISNULL(sys_variable)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("sys variable should not be null", K(tenant_id), K(ret));
} else if (OB_UNLIKELY(!session_info_->has_user_super_privilege() && sys_variable->is_read_only() &&
IS_READ_WRITE(parse_node.children_[0]->value_))) {
ret = OB_ERR_OPTION_PREVENTS_STATEMENT;
LOG_WARN("the server is running with read_only, cannot execute stmt");
} else {
bool tx_read_only = params_.session_info_->get_tx_read_only();
if (IS_READ_ONLY(parse_node.children_[0]->value_)) {
start_stmt->set_read_only(true);
} else if (IS_READ_WRITE(parse_node.children_[0]->value_)) {
start_stmt->set_read_only(false);
} else {
start_stmt->set_read_only(tx_read_only);
}
if (IS_WITH_SNAPSHOT(parse_node.children_[0]->value_)) {
start_stmt->set_with_consistent_snapshot(true);
}
}
}
return ret;
}
} // namespace sql
} // namespace oceanbase