127 lines
4.8 KiB
C++
127 lines
4.8 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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* This file is for func xmlserialize.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_xml_serialize.h"
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#include "ob_expr_xml_func_helper.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_exec_context.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprXmlSerialize::ObExprXmlSerialize(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_XML_SERIALIZE, N_XMLSERIALIZE, MORE_THAN_TWO, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprXmlSerialize::~ObExprXmlSerialize()
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{
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}
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int ObExprXmlSerialize::calc_result_typeN(ObExprResType& type,
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ObExprResType* types,
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int64_t param_num,
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ObExprTypeCtx& type_ctx) const
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{
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int ret = OB_SUCCESS;
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ObExprResType dst_type;
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if (OB_UNLIKELY(param_num != 10)) {
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ret = OB_ERR_PARAM_SIZE;
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LOG_WARN("invalid param number", K(ret), K(param_num));
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} else if (!is_called_in_sql()) {
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ret = OB_ERR_SP_LILABEL_MISMATCH;
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LOG_WARN("expr call in pl semantics disallowed", K(ret), K(N_XMLSERIALIZE));
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LOG_USER_ERROR(OB_ERR_SP_LILABEL_MISMATCH, static_cast<int>(strlen(N_XMLSERIALIZE)), N_XMLSERIALIZE);
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} else {
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if (!ob_is_integer_type(types[0].get_type())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid xml doc type", K(ret), K(types[0].get_type()));
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} else if (types[1].is_ext() && types[1].get_udt_id() == T_OBJ_XML) {
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types[1].get_calc_meta().set_sql_udt(ObXMLSqlType);
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}
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if (OB_SUCC(ret) && OB_FAIL(get_dest_type(types[2], dst_type))) {
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LOG_WARN("fail to get return datatype", K(ret), K(dst_type));
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}
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// opt encoding and version
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for (int32_t i = 3; i < 7 && OB_SUCC(ret); i += 2) {
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if (!ob_is_integer_type(types[i].get_type())) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid opt type", K(ob_obj_type_str(types[i].get_type())), K(ret));
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} else if (!ob_is_string_type(types[i+1].get_type())) {
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types[i+1].set_calc_type(ObVarcharType);
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types[i+1].set_calc_collation_type(ObCharset::get_system_collation());
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}
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}
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// set return type
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if (OB_SUCC(ret)) {
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type.set_type(dst_type.get_type());
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if (dst_type.get_collation_type() == CS_TYPE_INVALID) {
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type.set_collation_type(CS_TYPE_UTF8MB4_BIN);
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} else {
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type.set_collation_type(dst_type.get_collation_type());
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}
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type.set_collation_level(CS_LEVEL_IMPLICIT);
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type.set_full_length(dst_type.get_length(), dst_type.get_length_semantics());
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}
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}
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return ret;
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}
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int ObExprXmlSerialize::get_dest_type(const ObExprResType as_type, ObExprResType &dst_type) const
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{
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int ret = OB_SUCCESS;
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if (!as_type.is_int() && !as_type.get_param().is_int()) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("cast param type is unexpected", K(as_type));
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} else {
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const ObObj ¶m = as_type.get_param();
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ParseNode parse_node;
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parse_node.value_ = param.get_int();
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ObObjType obj_type = static_cast<ObObjType>(parse_node.int16_values_[OB_NODE_CAST_TYPE_IDX]);
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ObCollationType cs_type = static_cast<ObCollationType>(parse_node.int16_values_[OB_NODE_CAST_COLL_IDX]);
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dst_type.set_type(obj_type);
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dst_type.set_collation_type(cs_type);
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if (ob_is_varchar_type(dst_type.get_type(), dst_type.get_collation_type()) || ob_is_nvarchar2(obj_type)) {
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dst_type.set_full_length(parse_node.int32_values_[1], as_type.get_accuracy().get_length_semantics());
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} else if (ob_is_clob(dst_type.get_type(), dst_type.get_collation_type()) ||
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ob_is_blob(dst_type.get_type(), dst_type.get_collation_type())) {
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int64_t text_length = parse_node.int32_values_[1];
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dst_type.set_length(text_length < 0 ? ObAccuracy::DDL_DEFAULT_ACCURACY[obj_type].get_length() : text_length);
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} else {
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ret = OB_ERR_INVALID_DATATYPE;
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LOG_WARN("invalid datatype", K(ret), K(dst_type.get_type()), K(dst_type.get_collation_type()));
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}
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}
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return ret;
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}
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int ObExprXmlSerialize::cg_expr(ObExprCGCtx &expr_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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UNUSED(expr_cg_ctx);
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UNUSED(raw_expr);
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rt_expr.eval_func_ = eval_xml_serialize;
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return OB_SUCCESS;
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}
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}
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} |