9b31f8aa03
Co-authored-by: nroskill <nroskill@gmail.com> Co-authored-by: akaError <lzg020616@163.com> Co-authored-by: yinyj17 <yinyijun92@gmail.com>
110 lines
4.5 KiB
C++
110 lines
4.5 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 xmlserialize.
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*/
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#ifndef OCEANBASE_SQL_OB_EXPR_XML_SERIALIZE_H_
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#define OCEANBASE_SQL_OB_EXPR_XML_SERIALIZE_H_
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#include "sql/engine/expr/ob_expr_operator.h"
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#ifdef OB_BUILD_ORACLE_XML
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#include "lib/xml/ob_multi_mode_interface.h"
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#include "lib/xml/ob_xml_tree.h"
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#endif
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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class ObExprXmlSerialize : public ObFuncExprOperator
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{
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public:
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explicit ObExprXmlSerialize(common::ObIAllocator &alloc);
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virtual ~ObExprXmlSerialize();
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virtual int calc_result_typeN(ObExprResType& type,
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ObExprResType* types,
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int64_t param_num,
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common::ObExprTypeCtx& type_ctx)
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const override;
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#ifdef OB_BUILD_ORACLE_XML
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static int eval_xml_serialize(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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#else
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static int eval_xml_serialize(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res) { return OB_NOT_SUPPORTED; }
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#endif
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virtual int cg_expr(ObExprCGCtx &expr_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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int get_dest_type(const ObExprResType as_type, ObExprResType &dst_type) const;
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#ifdef OB_BUILD_ORACLE_XML
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private:
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static bool is_supported_return_type(ObObjType val_type, ObCollationType cs_type);
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static int get_xml_base_by_doc_type(ObMulModeMemCtx* mem_ctx,
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bool is_xml_doc,
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ObCollationType cs_type,
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ObDatum *xml_datum,
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ObIMulModeBase *&node);
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static int get_and_check_int_from_expr(const ObExpr *expr,
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ObEvalCtx &ctx,
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int64_t start,
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int64_t end,
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int64_t &res);
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static int transform_to_dst_type(const ObExpr &expr, ObString &xml_format_str);
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static int string_length_check_only(const ObLength max_length_char,
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const ObCollationType cs_type,
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const ObObj &obj);
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static int get_and_check_encoding_spec(const ObExpr *expr,
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ObEvalCtx &ctx,
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ObObjType return_type,
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ObCollationType return_cs_type,
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ObString &encoding_spec);
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static int print_format_xml_text(ObIAllocator &allocator,
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ObEvalCtx &ctx,
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ObIMulModeBase *xml_doc,
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bool with_encoding,
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bool with_version,
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uint32_t format_flag,
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ObParameterPrint &print_params,
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ObString &res);
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private:
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// xml_doc_type
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const static int64_t OB_XML_DOCUMENT = 0;
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const static int64_t OB_XML_CONTENT = 1;
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const static int64_t OB_XML_DOC_TYPE_IMPLICIT = 2;
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// encoding type
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const static int64_t OB_XML_NONE_ENCODING = 0;
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const static int64_t OB_XML_WITH_ENCODING = 1;
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// version type
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const static int64_t OB_XML_NONE_VERSION = 0;
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const static int64_t OB_XML_WITH_VERSION = 1;
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// indent type
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const static int64_t OB_XML_NO_INDENT = 1;
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const static int64_t OB_XML_INDENT = 2;
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const static int64_t OB_XML_INDENT_SIZE = 3;
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const static int64_t OB_XML_INDENT_IMPLICT = 4;
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// indent size
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const static int64_t OB_XML_INDENT_INVALID = -1;
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const static int64_t OB_XML_INDENT_MIN = 0;
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const static int64_t OB_XML_INDENT_MAX = 12;
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// default type
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const static int64_t OB_XML_DEFAULTS_IMPLICIT = 0;
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const static int64_t OB_XML_HIDE_DEFAULTS = 1;
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const static int64_t OB_XML_SHOW_DEFAULTS = 2;
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#endif
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprXmlSerialize);
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};
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} // sql
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} // oceanbase
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#endif // OCEANBASE_SQL_OB_EXPR_XML_SERIALIZE_H_
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