200 lines
8.5 KiB
C++
200 lines
8.5 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 contains implementation for _make_xml_binary.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_priv_xml_binary.h"
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#include "ob_expr_lob_utils.h"
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#ifdef OB_BUILD_ORACLE_XML
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#include "sql/engine/expr/ob_expr_xml_func_helper.h"
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#include "lib/xml/ob_xml_util.h"
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#include "sql/engine/ob_exec_context.h"
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#endif
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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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// Internal expression used for generate binary xml from xmltype data
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ObExprPrivXmlBinary::ObExprPrivXmlBinary(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_PRIV_MAKE_XML_BINARY, N_PRIV_XML_BINARY, TWO_OR_THREE, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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int ObExprPrivXmlBinary::calc_result_typeN(ObExprResType& type,
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ObExprResType* types_stack,
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int64_t param_num,
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ObExprTypeCtx& type_ctx) const
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{
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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// 1st param is schema id for validation from column definition
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// schema id in xml data maybe 0 or different from column definition
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// 2nd param is xmltype data (udt sql type), or varchar(should parse again)
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if (param_num != 2) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid param number", K(param_num));
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} else if (!ob_is_oracle_numeric_type(types_stack[0].get_type())) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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LOG_WARN("invalid type", K(ret), K(types_stack[0].get_type()));
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} else if (types_stack[1].is_ext() && types_stack[1].get_udt_id() == T_OBJ_XML) {
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types_stack[1].get_calc_meta().set_sql_udt(ObXMLSqlType);
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} else if (!types_stack[1].is_xml_sql_type()
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&& !types_stack[1].is_character_type() // remove later
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&& !types_stack[1].is_null()) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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LOG_WARN("invalid type", K(ret), K(types_stack[1].get_type()));
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}
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if (OB_SUCC(ret)) {
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if (types_stack[1].is_character_type() && types_stack[1].get_charset_type() != CHARSET_UTF8MB4) {
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types_stack[1].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN); // remove later
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}
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type.set_type(ObLongTextType);
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type.set_collation_type(CS_TYPE_BINARY);
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type.set_collation_level(CS_LEVEL_IMPLICIT);
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type.set_accuracy(ObAccuracy::DDL_DEFAULT_ACCURACY[ObLongTextType]);
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}
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return ret;
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}
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#ifdef OB_BUILD_ORACLE_XML
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int ObExprPrivXmlBinary::eval_priv_xml_binary(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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int ret = OB_SUCCESS;
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ObDatum *schema_id = NULL;
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ObDatum *xml_datum = NULL;
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ObObjParam old_expr_type;
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if (expr.args_[1]->type_ == T_QUESTIONMARK) {
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const ParamStore ¶m_store = ctx.exec_ctx_.get_physical_plan_ctx()->get_param_store();
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int64_t param_idx = expr.args_[1]->extra_;
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if (param_idx < 0 || param_idx >= param_store.count()) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("param_idx is invalid", K(ret), K(param_idx));
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} else {
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old_expr_type = param_store.at(param_idx);
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if (ObLongTextType == old_expr_type.get_type()) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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LOG_WARN("old_expr_type invalid ObLongTextType type", K(ret));
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}
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}
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}
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if (OB_FAIL(ret)) {
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} else if (OB_FAIL(expr.args_[0]->eval(ctx, schema_id))) {
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LOG_WARN("eval geo arg failed", K(ret));
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} else if (OB_FAIL(expr.args_[1]->eval(ctx, xml_datum))) {
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LOG_WARN("eval sird arg failed", K(ret));
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} else if (xml_datum->is_null()) {
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res.set_null();
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} else {
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ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
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common::ObArenaAllocator &tmp_allocator = tmp_alloc_g.get_allocator();
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ObString xml_plain_text = xml_datum->get_string();
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ObIMulModeBase *xml_root = NULL;
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ObStringBuffer jbuf(&tmp_allocator);
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ObCollationType cs_type = expr.args_[1]->obj_meta_.is_character_type()
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? expr.args_[1]->obj_meta_.get_collation_type()
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: CS_TYPE_BINARY;
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ObObjType in_type = expr.args_[1]->obj_meta_.is_character_type()
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? expr.args_[1]->obj_meta_.get_type()
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: ObLongTextType;
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ObMulModeMemCtx* mem_ctx = nullptr;
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lib::ObMallocHookAttrGuard malloc_guard(lib::ObMemAttr(MTL_ID(), "XMLModule"));
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if (OB_FAIL(ObXmlUtil::create_mulmode_tree_context(&tmp_allocator, mem_ctx))) {
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LOG_WARN("fail to create tree memory context", K(ret));
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} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(&tmp_allocator,
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in_type,
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cs_type,
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true,
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xml_plain_text))) {
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LOG_WARN("get xml plain text failed", K(ret), K(xml_datum));
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} else if (xml_plain_text.empty()) {
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res.set_null();
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} else if (expr.args_[1]->obj_meta_.is_character_type()) {
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// remove later, use xmlparse in rewrite, input arg can be restricted to xmltype
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ObXmlDocument *xml_doc = NULL;
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if (OB_FAIL(ObXmlParserUtils::parse_document_text(mem_ctx, xml_plain_text, xml_doc))) {
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LOG_WARN("parse xml plain text as document failed.", K(ret), K(xml_plain_text));
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ret = OB_ERR_XML_PARSE;
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LOG_USER_ERROR(OB_ERR_XML_PARSE);
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} else if (OB_ISNULL(xml_doc)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("get null xml document.", K(ret));
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} else {
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xml_root = static_cast<ObIMulModeBase *>(xml_doc);
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ObString res_string;
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if (!xml_doc->get_encoding().empty() || xml_doc->get_encoding_flag()) {
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xml_doc->set_encoding(ObXmlUtil::get_charset_name(ObCollationType::CS_TYPE_UTF8MB4_BIN));
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}
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if (OB_FAIL(xml_root->get_raw_binary(res_string, &tmp_allocator))) {
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LOG_WARN("failed to get xml binary", K(ret), K(xml_plain_text));
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} else {
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ObTextStringDatumResult str_result(expr.datum_meta_.type_, &expr, &ctx, &res);
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if (OB_FAIL(str_result.init(res_string.length()))) {
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LOG_WARN("init lob result failed");
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} else if (OB_FAIL(str_result.append(res_string.ptr(), res_string.length()))) {
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LOG_WARN("append lob result failed");
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} else {
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str_result.set_result();
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}
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}
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}
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} else { // must be xmlsql type
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// Todo: xml schema validation
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ObMulModeNodeType type = M_NULL;
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if (OB_FAIL(ObXmlUtil::xml_bin_type(xml_plain_text, type))) {
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} else if (type == M_UNPARESED_DOC) {
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ObString res_string;
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if (OB_FAIL(common::ObMulModeFactory::get_xml_base(mem_ctx, xml_plain_text,
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ObNodeMemType::BINARY_TYPE,
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ObNodeMemType::BINARY_TYPE,
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xml_root))) {
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LOG_WARN("get xml base failed", K(ret));
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} else if (OB_FAIL(xml_root->get_raw_binary(res_string, mem_ctx->allocator_))) {
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LOG_WARN("get raw binary failed", K(ret));
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} else {
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ObTextStringDatumResult str_result(expr.datum_meta_.type_, &expr, &ctx, &res);
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if (OB_FAIL(str_result.init(res_string.length()))) {
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LOG_WARN("init lob result failed");
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} else if (OB_FAIL(str_result.append(res_string.ptr(), res_string.length()))) {
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LOG_WARN("append lob result failed");
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} else {
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str_result.set_result();
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}
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}
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} else if (type != M_DOCUMENT && type != M_UNPARESED_DOC) {
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ret = OB_XML_INSERT_FRAGMENT;
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LOG_WARN("can only insert xml document", K(ret), K(type));
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} else {
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res.set_string(xml_datum->get_string());
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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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#endif
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int ObExprPrivXmlBinary::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
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{
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UNUSEDx(expr_cg_ctx, raw_expr);
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rt_expr.eval_func_ = eval_priv_xml_binary;
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return OB_SUCCESS;
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}
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} // namespace sql
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} // namespace oceanbase
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