DataOps-platform/app/core/data_resource/resource.py

import json
import re
import logging
from py2neo import Relationship
import pandas as pd
from app.services.neo4j_driver import neo4j_driver
from app.services.package_function import create_or_get_node, relationship_exists, get_node

logger = logging.getLogger("app")

def get_formatted_time():
    """获取格式化的当前时间"""
    import time
    return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

def get_node_by_id(label, id):
    """根据ID获取指定标签的节点"""
    try:
        with neo4j_driver.get_session() as session:
            cypher = f"MATCH (n:{label}) WHERE id(n) = $id RETURN n"
            result = session.run(cypher, id=int(id))
            record = result.single()
            return record["n"] if record else None
    except Exception as e:
        logger.error(f"根据ID获取节点失败: {str(e)}")
        return None

def get_node_by_id_no_label(id):
    """根据ID获取节点，不限制标签"""
    try:
        with neo4j_driver.get_session() as session:
            cypher = "MATCH (n) WHERE id(n) = $id RETURN n"
            result = session.run(cypher, id=int(id))
            record = result.single()
            return record["n"] if record else None
    except Exception as e:
        logger.error(f"根据ID获取节点失败: {str(e)}")
        return None

def delete_relationships(start_node, rel_type=None, end_node=None):
    """删除关系"""
    try:
        with neo4j_driver.get_session() as session:
            if rel_type and end_node:
                cypher = "MATCH (a)-[r:`{rel_type}`]->(b) WHERE id(a) = $start_id AND id(b) = $end_id DELETE r"
                cypher = cypher.replace("{rel_type}", rel_type)
                session.run(cypher, start_id=start_node.id, end_id=end_node.id)
            elif rel_type:
                cypher = "MATCH (a)-[r:`{rel_type}`]->() WHERE id(a) = $start_id DELETE r"
                cypher = cypher.replace("{rel_type}", rel_type)
                session.run(cypher, start_id=start_node.id)
            else:
                cypher = "MATCH (a)-[r]->() WHERE id(a) = $start_id DELETE r"
                session.run(cypher, start_id=start_node.id)
        return True
    except Exception as e:
        logger.error(f"删除关系失败: {str(e)}")
        return False

def update_or_create_node(label, **properties):
    """更新或创建节点"""
    try:
        with neo4j_driver.get_session() as session:
            node_id = properties.pop('id', None)
            if node_id:
                # 更新现有节点
                set_clause = ", ".join([f"n.{k} = ${k}" for k in properties.keys()])
                cypher = f"MATCH (n:{label}) WHERE id(n) = $id SET {set_clause} RETURN n"
                result = session.run(cypher, id=int(node_id), **properties)
            else:
                # 创建新节点
                props_str = ", ".join([f"{k}: ${k}" for k in properties.keys()])
                cypher = f"CREATE (n:{label} {{{props_str}}}) RETURN n"
                result = session.run(cypher, **properties)
            
            record = result.single()
            return record["n"] if record else None
    except Exception as e:
        logger.error(f"更新或创建节点失败: {str(e)}")
        return None

# 数据资源-元数据 关系节点创建、查询
def handle_node(receiver, head_data, data_resource):
    """处理数据资源节点创建和关系建立"""
    try:
        # 更新属性
        update_attributes = {
            'en_name': data_resource['en_name'],
            'time': get_formatted_time(),
            'type': 'structure'  # 结构化文件没有type
        }
        if 'additional_info' in receiver:
            del receiver['additional_info']
        tag_list = receiver.get('tag')
        receiver.update(update_attributes)

        # 创建或获取 data_resource 节点
        with neo4j_driver.get_session() as session:
            props_str = ", ".join([f"{k}: ${k}" for k in receiver.keys()])
            cypher = f"""
            MERGE (n:data_resource {{name: $name}})
            ON CREATE SET n = {{{props_str}}}
            ON MATCH SET {", ".join([f"n.{k} = ${k}" for k in receiver.keys()])}
            RETURN n
            """
            result = session.run(cypher, **receiver)
            data_resource_node = result.single()["n"]
            resource_id = data_resource_node.id

            # 处理标签关系
            if tag_list:
                tag_node = get_node_by_id('data_label', tag_list)
                if tag_node:
                    # 检查关系是否存在
                    rel_check = """
                    MATCH (a:data_resource)-[r:label]->(b:data_label) 
                    WHERE id(a) = $resource_id AND id(b) = $tag_id
                    RETURN r
                    """
                    rel_result = session.run(rel_check, resource_id=resource_id, tag_id=tag_node.id)
                    
                    # 如果关系不存在则创建
                    if not rel_result.single():
                        rel_create = """
                        MATCH (a:data_resource), (b:data_label)
                        WHERE id(a) = $resource_id AND id(b) = $tag_id
                        CREATE (a)-[r:label]->(b)
                        RETURN r
                        """
                        session.run(rel_create, resource_id=resource_id, tag_id=tag_node.id)

            # 处理头部数据（元数据）
            if head_data:
                for item in head_data:
                    # 创建元数据节点
                    meta_cypher = """
                    MERGE (m:Metadata {name: $name})
                    ON CREATE SET m.en_name = $en_name, m.createTime = $create_time
                    RETURN m
                    """
                    
                    create_time = get_formatted_time()
                    meta_result = session.run(
                        meta_cypher,
                        name=item['name'],
                        en_name=item['en_name'],
                        create_time=create_time
                    )
                    meta_node = meta_result.single()["m"]
                    
                    # 创建关系
                    rel_cypher = """
                    MATCH (a:data_resource), (m:Metadata)
                    WHERE id(a) = $resource_id AND id(m) = $meta_id
                    MERGE (a)-[r:contain]->(m)
                    RETURN r
                    """
                    
                    session.run(
                        rel_cypher,
                        resource_id=resource_id,
                        meta_id=meta_node.id
                    )
            
            return resource_id
    except Exception as e:
        logger.error(f"处理数据资源节点创建和关系建立失败: {str(e)}")
        raise

def handle_id_resource(resource_id):
    """处理单个数据资源查询"""
    try:
        with neo4j_driver.get_session() as session:
            # 查询数据资源节点
            cypher = """
            MATCH (n:data_resource)
            WHERE id(n) = $resource_id
            RETURN n
            """
            result = session.run(cypher, resource_id=int(resource_id))
            record = result.single()
            
            if not record:
                return None
                
            data_resource = dict(record["n"])
            data_resource["id"] = record["n"].id
            
            # 查询关联的标签
            tag_cypher = """
            MATCH (n:data_resource)-[:label]->(t:data_label)
            WHERE id(n) = $resource_id
            RETURN t
            """
            tag_result = session.run(tag_cypher, resource_id=int(resource_id))
            tag_record = tag_result.single()
            
            if tag_record:
                tag = dict(tag_record["t"])
                tag["id"] = tag_record["t"].id
                data_resource["tag_info"] = tag
            
            # 查询关联的元数据
            meta_cypher = """
            MATCH (n:data_resource)-[:contain]->(m:Metadata)
            WHERE id(n) = $resource_id
            RETURN m
            """
            meta_result = session.run(meta_cypher, resource_id=int(resource_id))
            
            meta_list = []
            for meta_record in meta_result:
                meta = dict(meta_record["m"])
                meta["id"] = meta_record["m"].id
                meta_list.append(meta)
            
            data_resource["meta_list"] = meta_list
            
            return data_resource
    except Exception as e:
        logger.error(f"处理单个数据资源查询失败: {str(e)}")
        return None

def id_resource_graph(resource_id):
    """获取数据资源图谱"""
    try:
        with neo4j_driver.get_session() as session:
            # 查询数据资源节点及其关系
            cypher = """
            MATCH (n:data_resource)-[r]-(m)
            WHERE id(n) = $resource_id
            RETURN n, r, m
            """
            result = session.run(cypher, resource_id=int(resource_id))
            
            # 收集节点和关系
            nodes = {}
            relationships = []
            
            for record in result:
                # 处理源节点
                source_node = dict(record["n"])
                source_node["id"] = record["n"].id
                nodes[source_node["id"]] = source_node
                
                # 处理目标节点
                target_node = dict(record["m"])
                target_node["id"] = record["m"].id
                nodes[target_node["id"]] = target_node
                
                # 处理关系
                rel = record["r"]
                relationship = {
                    "id": rel.id,
                    "source": record["n"].id,
                    "target": record["m"].id,
                    "type": rel.type
                }
                relationships.append(relationship)
            
            return {
                "nodes": list(nodes.values()),
                "relationships": relationships
            }
    except Exception as e:
        logger.error(f"获取数据资源图谱失败: {str(e)}")
        return {"nodes": [], "relationships": []}

def resource_list(page, page_size, en_name_filter=None, name_filter=None, 
                 type_filter='all', category_filter=None, tag_filter=None):
    """获取数据资源列表"""
    try:
        with neo4j_driver.get_session() as session:
            # 构建查询条件
            match_clause = "MATCH (n:data_resource)"
            where_conditions = []
            
            if en_name_filter:
                where_conditions.append(f"n.en_name CONTAINS '{en_name_filter}'")
                
            if name_filter:
                where_conditions.append(f"n.name CONTAINS '{name_filter}'")
                
            if type_filter and type_filter != 'all':
                where_conditions.append(f"n.type = '{type_filter}'")
                
            if category_filter:
                where_conditions.append(f"n.category = '{category_filter}'")
                
            # 标签过滤需要额外的匹配
            if tag_filter:
                match_clause += "-[:label]->(t:data_label)"
                where_conditions.append(f"t.name = '{tag_filter}'")
            
            where_clause = " WHERE " + " AND ".join(where_conditions) if where_conditions else ""
            
            # 计算总数
            count_cypher = f"{match_clause}{where_clause} RETURN count(n) as count"
            count_result = session.run(count_cypher)
            total_count = count_result.single()["count"]
            
            # 分页查询
            skip = (page - 1) * page_size
            cypher = f"""
            {match_clause}{where_clause}
            RETURN n
            ORDER BY n.time DESC
            SKIP {skip} LIMIT {page_size}
            """
            result = session.run(cypher)
            
            # 格式化结果
            resources = []
            for record in result:
                node = dict(record["n"])
                node["id"] = record["n"].id
                
                # 查询关联的标签
                tag_cypher = """
                MATCH (n:data_resource)-[:label]->(t:data_label)
                WHERE id(n) = $resource_id
                RETURN t
                """
                tag_result = session.run(tag_cypher, resource_id=node["id"])
                tag_record = tag_result.single()
                
                if tag_record:
                    tag = dict(tag_record["t"])
                    tag["id"] = tag_record["t"].id
                    node["tag_info"] = tag
                
                resources.append(node)
                
            return resources, total_count
    except Exception as e:
        logger.error(f"获取数据资源列表失败: {str(e)}")
        return [], 0

def id_data_search_list(resource_id, page, page_size, en_name_filter=None,
                       name_filter=None, category_filter=None, tag_filter=None):
    """获取特定数据资源关联的元数据列表"""
    try:
        with neo4j_driver.get_session() as session:
            # 基本匹配语句
            match_clause = """
            MATCH (n:data_resource)-[:contain]->(m:Metadata)
            WHERE id(n) = $resource_id
            """
            where_conditions = []
            
            if en_name_filter:
                where_conditions.append(f"m.en_name CONTAINS '{en_name_filter}'")
                
            if name_filter:
                where_conditions.append(f"m.name CONTAINS '{name_filter}'")
                
            if category_filter:
                where_conditions.append(f"m.category = '{category_filter}'")
                
            # 标签过滤需要额外的匹配
            tag_match = ""
            if tag_filter:
                tag_match = "MATCH (m)-[:HAS_TAG]->(t:Tag) WHERE t.name = $tag_filter"
            
            where_clause = " AND " + " AND ".join(where_conditions) if where_conditions else ""
            
            # 计算总数
            count_cypher = f"""
            {match_clause}{where_clause}
            {tag_match}
            RETURN count(m) as count
            """
            count_params = {"resource_id": int(resource_id)}
            if tag_filter:
                count_params["tag_filter"] = tag_filter
                
            count_result = session.run(count_cypher, **count_params)
            total_count = count_result.single()["count"]
            
            # 分页查询
            skip = (page - 1) * page_size
            cypher = f"""
            {match_clause}{where_clause}
            {tag_match}
            RETURN m
            ORDER BY m.name
            SKIP {skip} LIMIT {page_size}
            """
            
            result = session.run(cypher, **count_params)
            
            # 格式化结果
            metadata_list = []
            for record in result:
                node = dict(record["m"])
                node["id"] = record["m"].id
                metadata_list.append(node)
                
            return metadata_list, total_count
    except Exception as e:
        logger.error(f"获取数据资源关联的元数据列表失败: {str(e)}")
        return [], 0

def resource_kinship_graph(resource_id, include_meta=True):
    """获取数据资源亲缘关系图谱"""
    try:
        with neo4j_driver.get_session() as session:
            # 基本查询
            cypher_parts = [
                "MATCH (n:data_resource) WHERE id(n) = $resource_id",
                "OPTIONAL MATCH (n)-[:label]->(l:data_label)",
            ]
            
            # 是否包含元数据
            if include_meta:
                cypher_parts.append("OPTIONAL MATCH (n)-[:contain]->(m:Metadata)")
                
            cypher_parts.append("RETURN n, l, collect(m) as metadata")
            
            cypher = "\n".join(cypher_parts)
            
            result = session.run(cypher, resource_id=int(resource_id))
            record = result.single()
            
            if not record:
                return {"nodes": [], "relationships": []}
                
            # 收集节点和关系
            nodes = {}
            relationships = []
            
            # 处理数据资源节点
            resource_node = dict(record["n"])
            resource_node["id"] = record["n"].id
            resource_node["labels"] = list(record["n"].labels)
            nodes[resource_node["id"]] = resource_node
            
            # 处理标签节点
            if record["l"]:
                label_node = dict(record["l"])
                label_node["id"] = record["l"].id
                label_node["labels"] = list(record["l"].labels)
                nodes[label_node["id"]] = label_node
                
                # 添加资源-标签关系
                relationships.append({
                    "id": f"rel-{resource_node['id']}-label-{label_node['id']}",
                    "source": resource_node["id"],
                    "target": label_node["id"],
                    "type": "label"
                })
            
            # 处理元数据节点
            if include_meta and record["metadata"]:
                for meta in record["metadata"]:
                    if meta:  # 检查元数据节点是否存在
                        meta_node = dict(meta)
                        meta_node["id"] = meta.id
                        meta_node["labels"] = list(meta.labels)
                        nodes[meta_node["id"]] = meta_node
                        
                        # 添加资源-元数据关系
                        relationships.append({
                            "id": f"rel-{resource_node['id']}-contain-{meta_node['id']}",
                            "source": resource_node["id"],
                            "target": meta_node["id"],
                            "type": "contain"
                        })
            
            return {
                "nodes": list(nodes.values()),
                "relationships": relationships
            }
    except Exception as e:
        logger.error(f"获取数据资源亲缘关系图谱失败: {str(e)}")
        return {"nodes": [], "relationships": []}

def resource_impact_all_graph(resource_id, include_meta=True):
    """获取数据资源影响关系图谱"""
    try:
        with neo4j_driver.get_session() as session:
            # 根据meta参数决定查询深度
            if include_meta:
                cypher = """
                MATCH path = (n:data_resource)-[*1..3]-(m)
                WHERE id(n) = $resource_id
                RETURN path
                """
            else:
                cypher = """
                MATCH path = (n:data_resource)-[*1..2]-(m)
                WHERE id(n) = $resource_id
                AND NOT (m:Metadata)
                RETURN path
                """
                
            result = session.run(cypher, resource_id=int(resource_id))
            
            # 收集节点和关系
            nodes = {}
            relationships = {}
            
            for record in result:
                path = record["path"]
                
                # 处理路径中的所有节点
                for node in path.nodes:
                    if node.id not in nodes:
                        node_dict = dict(node)
                        node_dict["id"] = node.id
                        node_dict["labels"] = list(node.labels)
                        nodes[node.id] = node_dict
                
                # 处理路径中的所有关系
                for rel in path.relationships:
                    if rel.id not in relationships:
                        rel_dict = {
                            "id": rel.id,
                            "source": rel.start_node.id,
                            "target": rel.end_node.id,
                            "type": rel.type
                        }
                        relationships[rel.id] = rel_dict
            
            return {
                "nodes": list(nodes.values()),
                "relationships": list(relationships.values())
            }
    except Exception as e:
        logger.error(f"获取数据资源影响关系图谱失败: {str(e)}")
        return {"nodes": [], "relationships": []}

def clean_type(type_str):
    """清洗SQL类型字符串"""
    # 提取基本类型，不包括长度或精度信息
    basic_type = re.sub(r'\(.*?\)', '', type_str).strip().upper()
    
    # 移除 VARYING 这样的后缀
    basic_type = re.sub(r'\s+VARYING$', '', basic_type)
    
    # 标准化常见类型
    type_mapping = {
        'INT': 'INTEGER',
        'INT4': 'INTEGER',
        'INT8': 'BIGINT',
        'SMALLINT': 'SMALLINT',
        'BIGINT': 'BIGINT',
        'FLOAT4': 'FLOAT',
        'FLOAT8': 'DOUBLE',
        'REAL': 'FLOAT',
        'DOUBLE PRECISION': 'DOUBLE',
        'NUMERIC': 'DECIMAL',
        'BOOL': 'BOOLEAN',
        'CHARACTER': 'CHAR',
        'CHAR VARYING': 'VARCHAR',
        'CHARACTER VARYING': 'VARCHAR',
        'TEXT': 'TEXT',
        'DATE': 'DATE',
        'TIME': 'TIME',
        'TIMESTAMP': 'TIMESTAMP',
        'TIMESTAMPTZ': 'TIMESTAMP WITH TIME ZONE',
        'BYTEA': 'BINARY',
        'JSON': 'JSON',
        'JSONB': 'JSONB',
        'UUID': 'UUID',
        'SERIAL': 'SERIAL',
        'SERIAL4': 'SERIAL',
        'SERIAL8': 'BIGSERIAL',
        'BIGSERIAL': 'BIGSERIAL'
    }
    
    # 尝试从映射表中获取标准化的类型
    return type_mapping.get(basic_type, basic_type)

def clean_field_name(field_name):
    """清洗字段名"""
    return field_name.strip('`').strip('"').strip("'")

def select_create_ddl(sql_content):
    """从SQL内容中提取创建表的DDL语句"""
    try:
        # 解析复杂的SQL文件，识别所有的CREATE TABLE语句及其关联的注释
        # 找到所有以CREATE TABLE开头的语句块，每个语句块包含主语句和相关的注释
        
        # 首先，分割 SQL 内容按分号
        statements = []
        current_statement = ""
        in_string = False
        string_quote = None
        
        for char in sql_content:
            if char in ["'", '"']:
                if not in_string:
                    in_string = True
                    string_quote = char
                elif char == string_quote:
                    in_string = False
                    string_quote = None
                current_statement += char
            elif char == ';' and not in_string:
                current_statement += char
                if current_statement.strip():
                    statements.append(current_statement.strip())
                current_statement = ""
            else:
                current_statement += char
        
        if current_statement.strip():
            statements.append(current_statement.strip())
        
        # 找出所有的CREATE TABLE语句和关联的注释
        create_table_statements = []
        create_index = -1
        in_table_block = False
        current_table = None
        current_block = ""
        
        for i, stmt in enumerate(statements):
            if re.search(r'^\s*CREATE\s+TABLE', stmt, re.IGNORECASE):
                # 如果已经在处理表，先保存当前块
                if in_table_block and current_block:
                    create_table_statements.append(current_block)
                    
                # 开始新的表块
                in_table_block = True
                current_block = stmt
                
                # 提取表名
                table_match = re.search(r'CREATE\s+TABLE\s+(?:(?:"[^"]+"|\'[^\']+\'|[^"\'\s\.]+)\.)?(?:"([^"]+)"|\'([^\']+)\'|([^"\'\s\(]+))', stmt, re.IGNORECASE)
                if table_match:
                    current_table = table_match.group(1) or table_match.group(2) or table_match.group(3)
                    current_table = current_table.strip('"\'') if current_table else ""
            
            elif in_table_block and (re.search(r'COMMENT\s+ON\s+TABLE', stmt, re.IGNORECASE) or 
                                   re.search(r'COMMENT\s+ON\s+COLUMN', stmt, re.IGNORECASE)):
                # 检查注释是否属于当前表
                if current_table:
                    # 表注释处理
                    if re.search(r'COMMENT\s+ON\s+TABLE', stmt, re.IGNORECASE):
                        table_comment_match = re.search(r'COMMENT\s+ON\s+TABLE\s+[\'"]?(\w+)[\'"]?', stmt, re.IGNORECASE)
                        if table_comment_match:
                            comment_table = table_comment_match.group(1).strip('"\'')
                            if comment_table == current_table:
                                current_block += " " + stmt
                            else:
                                # 这是另一个表的注释，当前表的DDL到此结束
                                create_table_statements.append(current_block)
                                in_table_block = False
                                current_block = ""
                                current_table = None
                    # 列注释处理
                    elif re.search(r'COMMENT\s+ON\s+COLUMN', stmt, re.IGNORECASE):
                        column_comment_match = re.search(r'COMMENT\s+ON\s+COLUMN\s+[\'"]?(\w+)[\'"]?\.', stmt, re.IGNORECASE)
                        if column_comment_match:
                            comment_table = column_comment_match.group(1).strip('"\'')
                            if comment_table == current_table:
                                current_block += " " + stmt
                            else:
                                # 这是另一个表的注释，当前表的DDL到此结束
                                create_table_statements.append(current_block)
                                in_table_block = False
                                current_block = ""
                                current_table = None
            
            elif in_table_block and re.search(r'^\s*CREATE\s+', stmt, re.IGNORECASE):
                # 如果遇到新的CREATE语句（不是注释），保存当前块并结束
                create_table_statements.append(current_block)
                in_table_block = False
                current_block = ""
                current_table = None
        
        # 添加最后一个块
        if in_table_block and current_block:
            create_table_statements.append(current_block)
        
        # 日志记录
        logger.debug(f"提取到 {len(create_table_statements)} 个DDL语句")
        for i, stmt in enumerate(create_table_statements):
            logger.debug(f"DDL语句 {i+1}: {stmt}")
            
        return create_table_statements
        
    except Exception as e:
        logger.error(f"提取DDL语句失败: {str(e)}")
        logger.error(traceback.format_exc())
        return []

def table_sql(sql):
    """解析表定义SQL，支持带schema和不带schema两种格式"""
    try:
        # 支持以下格式：
        # 1. CREATE TABLE tablename
        # 2. CREATE TABLE "tablename"
        # 3. CREATE TABLE 'tablename'
        # 4. CREATE TABLE schema.tablename
        # 5. CREATE TABLE "schema"."tablename"
        # 6. CREATE TABLE 'schema'.'tablename'
        # 匹配表名，支持带引号和不带引号的情况
        table_pattern = r'CREATE\s+TABLE\s+(?:(?:"([^"]+)"|\'([^\']+)\'|([^"\'\s\.]+))\.)?(?:"([^"]+)"|\'([^\']+)\'|([^"\'\s\(]+))'
        table_match = re.search(table_pattern, sql, re.IGNORECASE)
        
        if not table_match:
            logger.error(f"无法匹配CREATE TABLE语句: {sql[:100]}...")
            return None
            
        # 获取表名
        schema = table_match.group(1) or table_match.group(2) or table_match.group(3)
        table_name = table_match.group(4) or table_match.group(5) or table_match.group(6)
        if not table_name:
            logger.error("无法解析表名")
            return None
            
        logger.debug(f"解析到表名: {table_name}")
        
        # 提取CREATE TABLE语句的主体部分（括号内的内容）
        body_pattern = r'CREATE\s+TABLE\s+[^(]*\((.*?)\)(?=\s*;|\s*$)'
        body_match = re.search(body_pattern, sql, re.DOTALL | re.IGNORECASE)
        
        if not body_match:
            logger.error("无法提取表主体内容")
            return None
            
        body_text = body_match.group(1).strip()
        logger.debug(f"表定义主体部分: {body_text}")
        
        # 解析字段定义
        fields = []
        # 分割字段定义，处理括号嵌套和引号
        field_defs = []
        pos = 0
        in_parentheses = 0
        in_quotes = False
        quote_char = None
        
        for i, char in enumerate(body_text):
            if char in ["'", '"', '`'] and (not in_quotes or char == quote_char):
                in_quotes = not in_quotes
                if in_quotes:
                    quote_char = char
                else:
                    quote_char = None
            elif char == '(' and not in_quotes:
                in_parentheses += 1
            elif char == ')' and not in_quotes:
                in_parentheses -= 1
            elif char == ',' and in_parentheses == 0 and not in_quotes:
                field_defs.append(body_text[pos:i].strip())
                pos = i + 1
                
        # 添加最后一个字段定义
        if pos < len(body_text):
            field_defs.append(body_text[pos:].strip())
            
        logger.debug(f"解析出 {len(field_defs)} 个字段定义")
        
        # 处理每个字段定义
        for field_def in field_defs:
            # 跳过约束定义
            if re.match(r'^\s*(?:PRIMARY|UNIQUE|FOREIGN|CHECK|CONSTRAINT)\s+', field_def, re.IGNORECASE):
                continue
                
            # 提取字段名和类型
            field_pattern = r'^\s*(?:"([^"]+)"|\'([^\']+)\'|`([^`]+)`|([a-zA-Z0-9_]+))\s+(.+?)(?:\s+DEFAULT\s+|\s+NOT\s+NULL|\s+REFERENCES|\s*$)'
            field_match = re.search(field_pattern, field_def, re.IGNORECASE)
            
            if field_match:
                # 提取字段名
                field_name = field_match.group(1) or field_match.group(2) or field_match.group(3) or field_match.group(4)
                # 提取类型
                field_type = field_match.group(5).strip()
                
                # 处理类型中可能的括号
                type_base = re.split(r'\s+', field_type)[0]
                clean_type_value = clean_type(type_base)
                
                fields.append((field_name, clean_type_value))
                logger.debug(f"解析到字段: {field_name}, 类型: {clean_type_value}")
            else:
                logger.warning(f"无法解析字段定义: {field_def}")
        
        # 提取表注释
        table_comment = ""
        table_comment_pattern = r"COMMENT\s+ON\s+TABLE\s+(?:['\"]?(\w+)['\"]?)\s+IS\s+'([^']+)'"
        table_comment_match = re.search(table_comment_pattern, sql, re.IGNORECASE)
        
        if table_comment_match:
            comment_table = table_comment_match.group(1)
            if comment_table.strip("'\"") == table_name.strip("'\""):
                table_comment = table_comment_match.group(2)
                logger.debug(f"找到表注释: {table_comment}")
            
        # 提取列注释
        comments = {}
        column_comment_pattern = r"COMMENT\s+ON\s+COLUMN\s+['\"]?(\w+)['\"]?\.['\"]?(\w+)['\"]?\s+IS\s+'([^']+)'"
        
        for match in re.finditer(column_comment_pattern, sql, re.IGNORECASE):
            comment_table = match.group(1)
            column_name = match.group(2)
            comment = match.group(3)
            
            # 检查表名是否匹配
            if comment_table.strip("'\"") == table_name.strip("'\""):
                comments[column_name] = comment
                logger.debug(f"找到列注释: {column_name} - {comment}")
            else:
                logger.debug(f"忽略列注释，表名不匹配: {comment_table} vs {table_name}")
        
        # 检查字段和注释匹配情况
        logger.debug("========字段和注释匹配情况========")
        field_names = [f[0] for f in fields]
        logger.debug(f"字段列表 ({len(field_names)}): {field_names}")
        logger.debug(f"注释字段 ({len(comments)}): {list(comments.keys())}")
        
        # 构建返回结果
        meta_list = []
        for field_name, field_type in fields:
            chinese_name = comments.get(field_name, "")
            meta_list.append({
                "en_name": field_name,
                "data_type": field_type,
                "name": chinese_name if chinese_name else field_name
            })
            
        # 检查表是否存在
        try:
            status = status_query([table_name])
        except Exception as e:
            logger.error(f"检查表存在状态失败: {str(e)}")
            status = [False]
            
        # 构建返回结果
        result = {
            table_name: {
                "exist": status[0] if status else False,
                "meta": meta_list
            }
        }
        
        logger.debug(f"解析结果: {json.dumps(result, ensure_ascii=False)}")
        return result
        
    except Exception as e:
        logger.error(f"解析表定义SQL失败: {str(e)}")
        logger.error(f"异常详情: {e}")
        import traceback
        logger.error(traceback.format_exc())
        return None

# 判断英文表名是否在图谱中存在
def status_query(key_list):
    query = """
    unwind $Key_list as name
    OPTIONAL MATCH (n:data_model {en_name: name})
    OPTIONAL MATCH (n:data_resource {en_name: name})
    OPTIONAL MATCH (n:data_metric {en_name: name})
    WITH name, CASE 
        WHEN n IS NOT NULL THEN True
        ELSE False
    END AS exist
    return collect(exist)AS exist
    """
    with neo4j_driver.get_session() as session:
        result = session.run(query, Key_list=key_list)
        data = result.value() # 获取单个值
    return data


def select_sql(sql_query):
    """解析SELECT查询语句"""
    try:
        # 提取SELECT子句
        select_pattern = r'SELECT\s+(.*?)\s+FROM'
        select_match = re.search(select_pattern, sql_query, re.IGNORECASE | re.DOTALL)
        
        if not select_match:
            return None
            
        select_clause = select_match.group(1)
        
        # 分割字段
        fields = []
        
        # 处理字段列表，避免在函数调用中的逗号导致错误分割
        in_parenthesis = 0
        current_field = ""
        
        for char in select_clause:
            if char == '(':
                in_parenthesis += 1
                current_field += char
            elif char == ')':
                in_parenthesis -= 1
                current_field += char
            elif char == ',' and in_parenthesis == 0:
                fields.append(current_field.strip())
                current_field = ""
            else:
                current_field += char
                
        if current_field.strip():
            fields.append(current_field.strip())
        
        # 解析每个字段
        parsed_fields = []
        
        for field in fields:
            # 检查是否有字段别名
            alias_pattern = r'(.*?)\s+[aA][sS]\s+(?:`([^`]+)`|"([^"]+)"|\'([^\']+)\'|([a-zA-Z0-9_]+))$'
            alias_match = re.search(alias_pattern, field)
            
            if alias_match:
                field_expr = alias_match.group(1).strip()
                field_alias = next((g for g in alias_match.groups()[1:] if g is not None), "")
                
                parsed_fields.append({
                    "expression": field_expr,
                    "alias": field_alias
                })
            else:
                # 没有别名的情况
                parsed_fields.append({
                    "expression": field.strip(),
                    "alias": None
                })
        
        # 提取FROM子句和表名
        from_pattern = r'FROM\s+(.*?)(?:\s+WHERE|\s+GROUP|\s+HAVING|\s+ORDER|\s+LIMIT|$)'
        from_match = re.search(from_pattern, sql_query, re.IGNORECASE | re.DOTALL)
        
        tables = []
        if from_match:
            from_clause = from_match.group(1).strip()
            
            # 分析FROM子句中的表
            table_pattern = r'(?:`([^`]+)`|"([^"]+)"|\'([^\']+)\'|([a-zA-Z0-9_]+))(?:\s+(?:AS\s+)?(?:`([^`]+)`|"([^"]+)"|\'([^\']+)\'|([a-zA-Z0-9_]+))?'
            for match in re.finditer(table_pattern, from_clause):
                table_name = match.group(1) or match.group(2) or match.group(3) or match.group(4)
                if table_name:
                    tables.append(table_name)
        
        return tables
        
    except Exception as e:
        logger.error(f"解析SELECT查询语句失败: {str(e)}")
        logger.error(traceback.format_exc())
        return None

def model_resource_list(page, page_size, name_filter=None):
    """获取模型资源列表"""
    try:
        with neo4j_driver.get_session() as session:
            # 构建查询条件
            match_clause = "MATCH (n:model_resource)"
            where_clause = ""
            
            if name_filter:
                where_clause = f" WHERE n.name CONTAINS '{name_filter}'"
            
            # 计算总数
            count_cypher = f"{match_clause}{where_clause} RETURN count(n) as count"
            count_result = session.run(count_cypher)
            total_count = count_result.single()["count"]
            
            # 分页查询
            skip = (page - 1) * page_size
            cypher = f"""
            {match_clause}{where_clause}
            RETURN n
            ORDER BY n.createTime DESC
            SKIP {skip} LIMIT {page_size}
            """
            result = session.run(cypher)
            
            # 格式化结果
            resources = []
            for record in result:
                node = dict(record["n"])
                node["id"] = record["n"].id
                resources.append(node)
                
            return resources, total_count
    except Exception as e:
        logger.error(f"获取模型资源列表失败: {str(e)}")
        return [], 0

def data_resource_edit(data):
    """编辑数据资源"""
    try:
        resource_id = data.get("id")
        if not resource_id:
            raise ValueError("缺少资源ID")
            
        with neo4j_driver.get_session() as session:
            # 更新节点属性
            update_fields = {}
            for key, value in data.items():
                if key != "id" and key != "tag":
                    update_fields[key] = value
            
            # 添加更新时间
            update_fields["updateTime"] = get_formatted_time()
            
            # 构建更新语句
            set_clause = ", ".join([f"n.{k} = ${k}" for k in update_fields.keys()])
            cypher = f"""
            MATCH (n:data_resource)
            WHERE id(n) = $resource_id
            SET {set_clause}
            RETURN n
            """
            
            result = session.run(cypher, resource_id=int(resource_id), **update_fields)
            updated_node = result.single()
            
            if not updated_node:
                raise ValueError("资源不存在")
                
            # 处理标签关系
            tag_id = data.get("tag")
            if tag_id:
                # 删除旧的标签关系
                delete_rel_cypher = """
                MATCH (n:data_resource)-[r:label]->()
                WHERE id(n) = $resource_id
                DELETE r
                """
                session.run(delete_rel_cypher, resource_id=int(resource_id))
                
                # 创建新的标签关系
                create_rel_cypher = """
                MATCH (n:data_resource), (t:data_label)
                WHERE id(n) = $resource_id AND id(t) = $tag_id
                CREATE (n)-[r:label]->(t)
                RETURN r
                """
                
                session.run(create_rel_cypher, resource_id=int(resource_id), tag_id=int(tag_id))
            
            # 返回更新后的节点
            return dict(updated_node["n"])
    except Exception as e:
        logger.error(f"编辑数据资源失败: {str(e)}")
        raise