87 lines
3.2 KiB
C++
87 lines
3.2 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#define USING_LOG_PREFIX SQL_RESV
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#include "ob_start_trans_resolver.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/ob_trans_character.h"
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#include "share/schema/ob_sys_variable_mgr.h" // ObSimpleSysVariableSchema
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namespace oceanbase
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{
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using namespace common;
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using namespace share;
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namespace sql
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{
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ObStartTransResolver::ObStartTransResolver(ObResolverParams ¶ms)
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: ObTCLResolver(params)
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{
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}
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ObStartTransResolver::~ObStartTransResolver()
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{
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}
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int ObStartTransResolver::resolve(const ParseNode &parse_node)
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{
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int ret = OB_SUCCESS;
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ObStartTransStmt *start_stmt = NULL;
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if (OB_UNLIKELY(T_BEGIN != parse_node.type_ || 2 != parse_node.num_child_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("unexpected val", K(parse_node.type_), K(parse_node.num_child_), K(ret));
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} else if (OB_UNLIKELY(NULL == (start_stmt = create_stmt<ObStartTransStmt>()))) {
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ret = OB_SQL_RESOLVER_NO_MEMORY;
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LOG_WARN("failed to create select stmt", K(ret));
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} else if (OB_ISNULL(schema_checker_)
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|| OB_ISNULL(schema_checker_->get_schema_guard())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("schema guard is null", KR(ret));
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} else {
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stmt_ = start_stmt;
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const uint64_t tenant_id = session_info_->get_effective_tenant_id();
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// Use initial simple sys variable while create a tenant to avoid cyclic dependence
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const share::schema::ObSimpleSysVariableSchema *sys_variable = NULL;
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share::schema::ObSchemaGetterGuard *schema_guard = schema_checker_->get_schema_guard();
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if (OB_FAIL(schema_guard->get_sys_variable_schema(tenant_id, sys_variable))) {
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LOG_WARN("fail to get sys variable schema", K(tenant_id), K(ret));
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} else if (OB_ISNULL(sys_variable)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("sys variable should not be null", K(tenant_id), K(ret));
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} else if (OB_UNLIKELY(!session_info_->has_user_super_privilege()
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&& sys_variable->get_read_only()
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&& IS_READ_WRITE(parse_node.children_[0]->value_))) {
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ret = OB_ERR_OPTION_PREVENTS_STATEMENT;
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LOG_WARN("the server is running with read_only, cannot execute stmt");
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} else {
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if (IS_READ_ONLY(parse_node.children_[0]->value_)) {
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start_stmt->set_read_only(true);
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} else if (IS_READ_WRITE(parse_node.children_[0]->value_)) {
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start_stmt->set_read_only(false);
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}
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if (IS_WITH_SNAPSHOT(parse_node.children_[0]->value_)) {
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start_stmt->set_with_consistent_snapshot(true);
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}
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// hint
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auto hint = parse_node.children_[1];
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if (hint) {
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start_stmt->set_hint(ObString(hint->str_len_, hint->str_value_));
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}
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}
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}
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return ret;
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}
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}/* ns sql*/
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}/* ns oceanbase */
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