4afa70a218
Co-authored-by: Carrot-77 <1012982871@qq.com> Co-authored-by: wu-xingying <729224612@qq.com>
65 lines
2.9 KiB
C++
65 lines
2.9 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 extractvalue.
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*/
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#ifndef OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_EXRACTVALUE_H
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#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_EXRACTVALUE_H
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "lib/xml/ob_xpath.h"
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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 ObExprExtractValue : public ObFuncExprOperator
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{
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public:
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explicit ObExprExtractValue(common::ObIAllocator &alloc);
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virtual ~ObExprExtractValue();
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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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static int eval_extract_value(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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static int eval_mysql_extract_value(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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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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private:
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static int extract_xpath_result(ObMulModeMemCtx *xml_mem_ctx, ObString& xpath_str, ObString& default_ns,
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ObIMulModeBase* xml_doc, ObPathVarObject* prefix_ns, ObString &xml_res);
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static int extract_mysql_xpath_result(ObMulModeMemCtx *xml_mem_ctx, ObString& xpath_str,
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ObIMulModeBase* xml_doc, ObStringBuffer &xml_res);
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static int extract_node_value(ObIAllocator &allocator, ObIMulModeBase *node, ObString &xml_res);
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static int has_same_parent_node(ObMulModeMemCtx *xml_mem_ctx, ObString& xpath_str, ObString& default_ns,
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ObIMulModeBase* xml_doc, ObPathVarObject* prefix_ns, bool &is_same_parent);
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static int merge_text_nodes_with_same_parent(ObIAllocator *allocator, ObIArray<ObIMulModeBase *> &result_nodes,
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ObString &xml_res);
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static int append_text_into_buffer(ObIAllocator *allocator,
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ObIArray<ObIMulModeBase *> &result_nodes,
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ObStringBuffer &xml_res);
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static int append_text_value(ObStringBuffer &buffer, ObIMulModeBase *node);
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static int get_new_xpath(ObString xpath_str, ObString &new_xpath, bool &cal_count);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprExtractValue);
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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_EXRACTVALUE_H
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