148 lines
6.2 KiB
C++
148 lines
6.2 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 "sql/resolver/ddl/ob_create_database_resolver.h"
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#include "sql/ob_sql_utils.h"
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#include "sql/resolver/ob_stmt_resolver.h"
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#include "sql/resolver/ddl/ob_database_resolver.h"
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#include "sql/resolver/ddl/ob_create_database_stmt.h"
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#include "sql/session/ob_sql_session_info.h"
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namespace oceanbase
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{
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using namespace common;
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namespace sql
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{
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ObCreateDatabaseResolver::ObCreateDatabaseResolver(ObResolverParams ¶ms)
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: ObDDLResolver(params)
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{
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}
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ObCreateDatabaseResolver::~ObCreateDatabaseResolver()
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{
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}
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int ObCreateDatabaseResolver::resolve(const ParseNode &parse_tree)
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{
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int ret = OB_SUCCESS;
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ParseNode *node = const_cast<ParseNode*>(&parse_tree);
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if (OB_ISNULL(node)
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|| OB_UNLIKELY(node->type_ != T_CREATE_DATABASE)
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|| OB_UNLIKELY(node->num_child_ != DATABASE_NODE_COUNT)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid parse tree", K(ret));
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} else if (OB_ISNULL(session_info_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("session info should not be null", K(ret));
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} else if (OB_ISNULL(node->children_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("invalid node children", K(node), K(node->children_));
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} else {
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ObCreateDatabaseStmt *create_database_stmt = NULL;
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if (OB_ISNULL(create_database_stmt = create_stmt<ObCreateDatabaseStmt>())) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_ERROR("failed to create create_database_stmt", K(ret));
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} else {
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stmt_ = create_database_stmt;
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create_database_stmt->set_tenant_id(session_info_->get_effective_tenant_id());
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}
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//resolve if not exists
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if (OB_SUCC(ret)) {
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if (node->children_[IF_NOT_EXIST] != NULL) {
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if (node->children_[IF_NOT_EXIST]->type_ != T_IF_NOT_EXISTS) {
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LOG_WARN("invalid parse tree", K(ret));
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} else {
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create_database_stmt->set_if_not_exists(true);
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}
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}
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}
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//resolve database name
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if (OB_SUCC(ret)) {
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ObString database_name;
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//node->children_指针上面已经做了判断，这里不再做判断
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ParseNode *dbname_node = node->children_[DBNAME];
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if (OB_ISNULL(dbname_node) || dbname_node->type_ != T_IDENT) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid parse tree", K(ret));
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} else {
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database_name.assign_ptr(dbname_node->str_value_,
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static_cast<int32_t>(dbname_node->str_len_));
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ObNameCaseMode mode = OB_NAME_CASE_INVALID;
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if (OB_FAIL(session_info_->get_name_case_mode(mode))) {
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LOG_WARN("fail to get name case mode", K(mode), K(ret));
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} else {
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bool perserve_lettercase = lib::is_oracle_mode() ?
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true : (mode != OB_LOWERCASE_AND_INSENSITIVE);
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ObCollationType cs_type = CS_TYPE_INVALID;
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if (OB_FAIL(session_info_->get_collation_connection(cs_type))) {
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LOG_WARN("fail to get collation_connection", K(ret));
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} else if (OB_FAIL(ObSQLUtils::check_and_convert_db_name(
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cs_type, perserve_lettercase, database_name))) {
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LOG_WARN("fail to check and convert database name", K(database_name), K(ret));
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} else if (OB_FAIL(create_database_stmt->set_database_name(database_name))) {
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LOG_WARN("set database name failed", K(ret));
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}
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}
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}
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}
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//resolve database options
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if (OB_SUCC(ret)) {
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//node->children_指针上面已经做了判断，这里不再做判断
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ParseNode *dboption_node = node->children_[DATABASE_OPTION];
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if (NULL != dboption_node) {
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if (T_DATABASE_OPTION_LIST != dboption_node->type_) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid parse tree", K(ret));
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} else {
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ObDatabaseResolver<ObCreateDatabaseStmt> resolver;
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if (OB_FAIL(resolver.resolve_database_options(create_database_stmt, dboption_node, session_info_))) {
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LOG_WARN("resolve database option failed", K(ret));
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}
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}
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} else {
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//empty
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}
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}
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if (OB_SUCC(ret)) {
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if (CHARSET_INVALID == create_database_stmt->get_charset_type() && CS_TYPE_INVALID == create_database_stmt->get_collation_type()) {
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// For CREATE DATABASE statements, the server character set and collation are used as default
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// values for table definitions if the database character set and collation are not specified.
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// To override this, provide explicit CHARACTER SET and COLLATE table options.
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// http://dev.mysql.com/doc/refman/5.7/en/charset-database.html
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int64_t coll_cs_srv_int64 = -1;
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int64_t coll_srv_int64 = -1;
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if (OB_FAIL(session_info_->get_sys_variable(share::SYS_VAR_CHARACTER_SET_SERVER, coll_cs_srv_int64))) {
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SQL_RESV_LOG(WARN, "fail to get sys variable character_set_server", K(ret));
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} else if (OB_FAIL(session_info_->get_sys_variable(share::SYS_VAR_COLLATION_SERVER, coll_srv_int64))) {
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SQL_RESV_LOG(WARN, "fail to get sys variable collation_server", K(ret));
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} else if (!ObCharset::is_valid_collation(coll_cs_srv_int64) || !ObCharset::is_valid_collation(coll_srv_int64)) {
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ret = OB_ERR_UNEXPECTED;
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SQL_RESV_LOG(WARN, "invalid collation type", K(ret), K(coll_cs_srv_int64), K(coll_srv_int64));
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} else {
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ObCharsetType cs = ObCharset::charset_type_by_coll(static_cast<ObCollationType>(coll_cs_srv_int64));
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ObCollationType coll_type = static_cast<ObCollationType>(coll_srv_int64);
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create_database_stmt->set_charset_type(cs);
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create_database_stmt->set_collation_type(coll_type);
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}
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}
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}
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}
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LOG_INFO("resolve create database finish", K(ret));
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return ret;
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}
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} //end namespace sql
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} //end namespace oceanbase
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