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src/sql/resolver/cmd/ob_variable_set_resolver.cpp
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266
src/sql/resolver/cmd/ob_variable_set_resolver.cpp
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/**
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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/ob_resolver_utils.h"
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#include "sql/resolver/expr/ob_raw_expr_util.h"
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#include "sql/resolver/dml/ob_select_resolver.h"
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#include "sql/resolver/cmd/ob_variable_set_resolver.h"
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#include "sql/resolver/cmd/ob_variable_set_stmt.h"
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#include "sql/session/ob_sql_session_info.h"
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namespace oceanbase {
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using namespace common;
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using namespace share;
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namespace sql {
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ObVariableSetResolver::ObVariableSetResolver(ObResolverParams& params) : ObStmtResolver(params)
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{}
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ObVariableSetResolver::~ObVariableSetResolver()
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{}
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int ObVariableSetResolver::resolve(const ParseNode& parse_tree)
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{
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int ret = OB_SUCCESS;
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ObVariableSetStmt* variable_set_stmt = NULL;
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if (OB_UNLIKELY(T_VARIABLE_SET != parse_tree.type_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("parse_tree.type_ must be T_VARIABLE_SET", K(ret), K(parse_tree.type_));
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} else if (OB_ISNULL(session_info_) || OB_ISNULL(allocator_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("session_info_ or allocator_ is NULL", K(ret), K(session_info_), K(allocator_));
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} else if (OB_ISNULL(variable_set_stmt = create_stmt<ObVariableSetStmt>())) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_ERROR("create variable set stmt failed", K(ret));
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} else {
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stmt_ = variable_set_stmt;
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variable_set_stmt->set_actual_tenant_id(session_info_->get_effective_tenant_id());
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ParseNode* set_node = NULL;
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ObVariableSetStmt::VariableSetNode var_node;
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for (int64_t i = 0; OB_SUCC(ret) && i < parse_tree.num_child_; ++i) {
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if (OB_ISNULL(set_node = parse_tree.children_[i])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("set node is NULL", K(ret));
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} else if (OB_UNLIKELY(T_VAR_VAL != set_node->type_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("set_node->type_ must be T_VAR_VAL", K(ret), K(set_node->type_));
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} else {
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ParseNode* var = NULL;
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switch (set_node->value_) {
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case 0:
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var_node.set_scope_ = ObSetVar::SET_SCOPE_SESSION;
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break;
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case 1:
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var_node.set_scope_ = ObSetVar::SET_SCOPE_GLOBAL;
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variable_set_stmt->set_has_global_variable(true);
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break;
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case 2:
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var_node.set_scope_ = ObSetVar::SET_SCOPE_SESSION;
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break;
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default:
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var_node.set_scope_ = ObSetVar::SET_SCOPE_NEXT_TRANS;
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break;
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}
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if (OB_FAIL(ret)) {
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} else if (OB_ISNULL(var = set_node->children_[0])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("var is NULL", K(ret));
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} else {
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ObString var_name;
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if (T_IDENT == var->type_) {
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var_node.is_system_variable_ = true;
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var_name.assign_ptr(var->str_value_, static_cast<int32_t>(var->str_len_));
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} else if (T_OBJ_ACCESS_REF == var->type_) { // Oracle mode
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const ParseNode* name_node = NULL;
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if (OB_ISNULL(name_node = var->children_[0]) || OB_UNLIKELY(var->children_[1] != NULL)) {
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ret = OB_NOT_SUPPORTED;
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LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable name not an identifier type");
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} else if (OB_UNLIKELY(name_node->type_ != T_IDENT)) {
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ret = OB_NOT_SUPPORTED;
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LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable name not an identifier type");
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} else {
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var_node.is_system_variable_ = true;
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var_name.assign_ptr(name_node->str_value_, static_cast<int32_t>(name_node->str_len_));
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}
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} else {
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var_node.is_system_variable_ = (T_SYSTEM_VARIABLE == var->type_);
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var_name.assign_ptr(var->str_value_, static_cast<int32_t>(var->str_len_));
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(ob_write_string(*allocator_, var_name, var_node.variable_name_))) {
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LOG_WARN("Can not malloc space for variable name", K(ret));
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} else {
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ObCharset::casedn(CS_TYPE_UTF8MB4_GENERAL_CI, var_node.variable_name_);
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}
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}
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if (OB_FAIL(ret)) {
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} else if (OB_ISNULL(set_node->children_[1])) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("value node is NULL", K(ret));
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} else if (T_DEFAULT == set_node->children_[1]->type_) {
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// set system_variable = default
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var_node.is_set_default_ = true;
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} else if (var_node.is_system_variable_) {
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ParseNode value_node;
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if (T_IDENT == set_node->children_[1]->type_) {
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MEMCPY(&value_node, set_node->children_[1], sizeof(ParseNode));
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value_node.type_ = T_VARCHAR;
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} else if (T_COLUMN_REF == set_node->children_[1]->type_) {
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if (NULL == set_node->children_[1]->children_[0] && NULL == set_node->children_[1]->children_[1] &&
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NULL != set_node->children_[1]->children_[2]) {
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MEMCPY(&value_node, set_node->children_[1]->children_[2], sizeof(ParseNode));
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value_node.type_ = T_VARCHAR;
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} else {
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MEMCPY(&value_node, set_node->children_[1], sizeof(ParseNode));
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}
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} else if (T_OBJ_ACCESS_REF == set_node->children_[1]->type_) { // Oracle mode
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if (OB_ISNULL(set_node->children_[1]->children_[0]) ||
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OB_UNLIKELY(set_node->children_[1]->children_[1] != NULL)) {
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ret = OB_NOT_SUPPORTED;
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LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable value not a varchar nor identifier type");
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} else {
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MEMCPY(&value_node, set_node->children_[1]->children_[0], sizeof(ParseNode));
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}
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if (OB_SUCC(ret)) {
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if (T_IDENT == set_node->children_[1]->children_[0]->type_) {
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value_node.type_ = T_VARCHAR;
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} else if (T_FUN_SYS == set_node->children_[1]->children_[0]->type_) {
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// do nothing
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} else {
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ret = OB_NOT_SUPPORTED;
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LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable value type");
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}
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}
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} else {
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MEMCPY(&value_node, set_node->children_[1], sizeof(ParseNode));
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}
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if (OB_SUCC(ret)) {
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if (0 == var_node.variable_name_.case_compare("ob_compatibility_mode") &&
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0 == strncasecmp(
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value_node.str_value_, "oracle", std::min(static_cast<int32_t>(value_node.str_len_), 6))) {
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ret = OB_NOT_SUPPORTED;
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LOG_USER_ERROR(OB_NOT_SUPPORTED, "Not support oracle mode");
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} else if (OB_FAIL(
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ObResolverUtils::resolve_const_expr(params_, value_node, var_node.value_expr_, NULL))) {
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LOG_WARN("resolve variable value failed", K(ret));
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}
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}
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} else {
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if (OB_FAIL(ObResolverUtils::resolve_const_expr(
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params_, *set_node->children_[1], var_node.value_expr_, NULL))) {
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LOG_WARN("resolve variable value failed", K(ret));
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}
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}
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if (OB_SUCC(ret) && OB_FAIL(variable_set_stmt->add_variable_node(var_node))) {
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LOG_WARN("Add set entry failed", K(ret));
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}
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}
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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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ObAlterSessionSetResolver::ObAlterSessionSetResolver(ObResolverParams& params) : ObStmtResolver(params)
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{}
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ObAlterSessionSetResolver::~ObAlterSessionSetResolver()
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{}
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// for oracle mode grammer: alter session set sys_var = val
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int ObAlterSessionSetResolver::resolve(const ParseNode& parse_tree)
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{
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int ret = OB_SUCCESS;
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ObVariableSetStmt* variable_set_stmt = NULL;
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if (OB_UNLIKELY(T_ALTER_SESSION_SET != parse_tree.type_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("parse_tree.type_ must be T_ALTER_SESSION_SET", K(ret), K(parse_tree.type_));
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} else if (OB_ISNULL(session_info_) || OB_ISNULL(allocator_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_ERROR("session_info_ or allocator_ is NULL", K(ret), K(session_info_), K(allocator_));
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} else if (OB_ISNULL(variable_set_stmt = create_stmt<ObVariableSetStmt>())) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_ERROR("create variable set stmt failed", K(ret));
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} else {
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// start resolve
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stmt_ = variable_set_stmt;
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variable_set_stmt->set_actual_tenant_id(session_info_->get_effective_tenant_id());
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ParseNode* set_clause_node = NULL;
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ParseNode* set_param_node = NULL;
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ObVariableSetStmt::VariableSetNode var_node;
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// resolve alter_session_set_clause
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if (OB_ISNULL(set_clause_node = parse_tree.children_[0])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("set_clause_node is NULL", K(ret));
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} else if (T_ALTER_SESSION_SET_PARAMETER_LIST != set_clause_node->type_) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("set_node->type_ must be T_ALTER_SESSION_SET_PARAMETER_LIST", K(ret), K(set_clause_node->type_));
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} else {
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// resolve set_system_parameter_clause_list
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for (int64_t i = 0; OB_SUCC(ret) && i < set_clause_node->num_child_; ++i) {
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if (OB_ISNULL(set_param_node = set_clause_node->children_[i])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("set_param_node is null", K(ret));
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} else if (T_VAR_VAL != set_param_node->type_) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("set_node->type_ must be T_VAR_VAL", K(ret), K(set_param_node->type_));
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} else {
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// resolve set_system_parameter_clause
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ParseNode* var = NULL;
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var_node.set_scope_ = ObSetVar::SET_SCOPE_SESSION;
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if (OB_ISNULL(var = set_param_node->children_[0])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("var is NULL", K(ret));
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} else {
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// resolve variable
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ObString var_name;
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if (T_IDENT != var->type_) {
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ret = OB_NOT_SUPPORTED;
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LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable name not an identifier type");
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} else {
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var_node.is_system_variable_ = true;
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var_name.assign_ptr(var->str_value_, static_cast<int32_t>(var->str_len_));
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}
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if (OB_SUCC(ret)) {
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if (OB_FAIL(ob_write_string(*allocator_, var_name, var_node.variable_name_))) {
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LOG_WARN("Can not malloc space for variable name", K(ret));
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} else {
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ObCharset::casedn(CS_TYPE_UTF8MB4_GENERAL_CI, var_node.variable_name_);
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}
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}
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// resolve value
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if (OB_SUCC(ret)) {
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if (OB_ISNULL(set_param_node->children_[1])) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("value node is NULL", K(ret));
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} else if (var_node.is_system_variable_) {
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ParseNode value_node;
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MEMCPY(&value_node, set_param_node->children_[1], sizeof(ParseNode));
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if (OB_FAIL(ObResolverUtils::resolve_const_expr(params_, value_node, var_node.value_expr_, NULL))) {
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LOG_WARN("resolve variable value failed", K(ret));
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}
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}
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}
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}
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if (OB_SUCC(ret) && OB_FAIL(variable_set_stmt->add_variable_node(var_node))) {
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LOG_WARN("Add set entry failed", K(ret));
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}
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}
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} // end for
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}
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}
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return ret;
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}
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} // namespace sql
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} // namespace oceanbase
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