9b31f8aa03
Co-authored-by: nroskill <nroskill@gmail.com> Co-authored-by: akaError <lzg020616@163.com> Co-authored-by: yinyj17 <yinyijun92@gmail.com>
66 lines
2.4 KiB
C++
66 lines
2.4 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 extract(xml).
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*/
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#ifndef OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_EXRACT_XML_H
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#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_EXRACT_XML_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_xpath.h"
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#endif
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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 ObExprExtractXml : public ObFuncExprOperator
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{
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public:
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explicit ObExprExtractXml(common::ObIAllocator &alloc);
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virtual ~ObExprExtractXml();
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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) const override;
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#ifdef OB_BUILD_ORACLE_XML
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static int eval_extract_xml(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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#else
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static int eval_extract_xml(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)
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const override;
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#ifdef OB_BUILD_ORACLE_XML
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private:
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static int append_node_to_res(ObIAllocator &allocator,ObXmlDocument *root, ObIMulModeBase *node);
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static int concat_xpath_result(ObPathExprIter &xpath_iter,
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ObCollationType cs_type,
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ObXmlDocument *&root,
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ObMulModeNodeType &node_type,
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ObMulModeMemCtx* ctx);
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static int check_and_set_res(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &res,
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ObLibTreeNodeVector &node_vector,
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ObIAllocator &allocator);
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#endif
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprExtractXml);
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};
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} // sql
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} // oceanbase
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#endif // OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_EXRACT_XML_H
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