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2021-05-31 22:56:52 +08:00
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src/sql/resolver/dcl/ob_drop_user_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 "sql/resolver/dcl/ob_drop_user_resolver.h"
#include "sql/session/ob_sql_session_info.h"
#include "share/schema/ob_schema_struct.h"
using namespace oceanbase::sql;
using namespace oceanbase::common;
using oceanbase::share::schema::ObUserInfo;
ObDropUserResolver::ObDropUserResolver(ObResolverParams& params) : ObDCLResolver(params)
{}
ObDropUserResolver::~ObDropUserResolver()
{}
int ObDropUserResolver::resolve(const ParseNode& parse_tree)
{
int ret = OB_SUCCESS;
ParseNode* top_node = const_cast<ParseNode*>(&parse_tree);
ParseNode* user_list_node = nullptr;
ObDropUserStmt* drop_user_stmt = NULL;
CHECK_COMPATIBILITY_MODE(params_.session_info_);
if (OB_ISNULL(params_.session_info_)) {
ret = OB_NOT_INIT;
LOG_WARN("Session info is not inited", K(ret));
} else if (lib::is_oracle_mode()) {
// oracle mode
if (OB_ISNULL(top_node)) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "top_node is null", K(ret));
} else if (T_DROP_USER != top_node->type_ || 2 != top_node->num_child_) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "invalid argument", K(ret), K(top_node->type_), K(top_node->num_child_));
} else {
// resolve cascade_node
ParseNode* cascade_node = top_node->children_[1];
if (OB_ISNULL(cascade_node)) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "cascade_node is null", K(ret));
} else if (1 != cascade_node->value_) {
// todo: drop user only support cascade
ret = OB_NOT_SUPPORTED;
SQL_RESV_LOG(WARN, "this grammar is not supported now", K(ret));
} else {
if (OB_ISNULL(user_list_node = top_node->children_[0])) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "node is null", K(ret));
} else if (T_DROP_USER_LIST != user_list_node->type_ || user_list_node->num_child_ <= 0) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "invalid argument", K(ret), K(user_list_node->type_), K(user_list_node->num_child_));
} else if (user_list_node->num_child_ > 1) {
ret = OB_ERR_PARSER_SYNTAX;
SQL_RESV_LOG(WARN, "this grammar is not supported in oracle mode", K(ret));
} else {
// do nothing
}
}
}
} else { // !is_oracle_mode()
// mysql_mode
if (OB_ISNULL(top_node)) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "top_node is null", K(ret));
} else if (T_DROP_USER != top_node->type_ || top_node->num_child_ <= 0) {
ret = OB_ERR_UNEXPECTED;
SQL_RESV_LOG(WARN, "invalid argument", K(ret), K(top_node->type_), K(top_node->num_child_));
} else {
user_list_node = top_node;
}
}
if (OB_SUCC(ret)) {
// mysql mode and oracle mode in common
if (OB_ISNULL(drop_user_stmt = create_stmt<ObDropUserStmt>())) {
ret = OB_ALLOCATE_MEMORY_FAILED;
SQL_RESV_LOG(ERROR, "Failed to create ObDropUserStmt", K(ret));
} else {
uint64_t tenant_id = params_.session_info_->get_effective_tenant_id();
// resovle user_list_node
for (int i = 0; i < user_list_node->num_child_ && OB_SUCCESS == ret; ++i) {
if (OB_ISNULL(user_list_node->children_[i])) {
ret = OB_ERR_PARSE_SQL;
LOG_WARN("The child of user_hostname node should not be NULL", K(ret), K(i));
} else if (2 != user_list_node->children_[i]->num_child_) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("sql_parser parse user error", K(ret));
} else if (OB_ISNULL(user_list_node->children_[i]->children_[0])) {
// 0: user, 1: hostname
ret = OB_ERR_PARSE_SQL;
LOG_WARN("The child of user node should not be NULL", K(ret), K(i));
} else {
ParseNode* user_hostname_node = user_list_node->children_[i];
ObString user_name(user_hostname_node->children_[0]->str_len_, user_hostname_node->children_[0]->str_value_);
ObString host_name;
if (NULL == user_hostname_node->children_[1]) {
host_name.assign_ptr(OB_DEFAULT_HOST_NAME, static_cast<int32_t>(STRLEN(OB_DEFAULT_HOST_NAME)));
} else {
host_name.assign_ptr(user_hostname_node->children_[1]->str_value_,
static_cast<int32_t>(user_hostname_node->children_[1]->str_len_));
}
const ObUserInfo* user_info = NULL;
if (OB_FAIL(schema_checker_->get_user_info(tenant_id, user_name, host_name, user_info))) {
LOG_WARN("failed to get user info", K(ret), K(user_name));
if (OB_USER_NOT_EXIST == ret) {
// skip, RS general process , compat MySQL
ret = OB_SUCCESS;
}
} else if (extract_pure_id(user_info->get_user_id()) <= OB_USER_ID) {
ret = OB_ERR_NO_PRIVILEGE;
SQL_RESV_LOG(WARN, "Can not drop internal user", K(ret));
}
if (OB_SUCC(ret)) {
if (OB_FAIL(drop_user_stmt->add_user(user_name, host_name))) {
LOG_WARN("Add user error", K(user_name), K(ret));
}
}
}
}
if (OB_SUCC(ret)) {
drop_user_stmt->set_tenant_id(tenant_id);
}
}
}
if (OB_SUCC(ret) && ObSchemaChecker::is_ora_priv_check()) {
OZ(schema_checker_->check_ora_ddl_priv(session_info_->get_effective_tenant_id(),
session_info_->get_priv_user_id(),
ObString(""),
stmt::T_DROP_USER,
session_info_->get_enable_role_array()),
session_info_->get_effective_tenant_id(),
session_info_->get_user_id());
}
return ret;
}