#if MYSQL_6_9 || MYSQL_6_10 /* 2021.11.07 */ using Externals.MySql.Data.MySqlClient; using System; using System.Collections.Generic; using System.Data; using System.Net; using System.Text; using System.Transactions; using static Apewer.Source.OrmHelper; namespace Apewer.Source { /// public class MySql : IDbClient { #region 基础 private Timeout _timeout = null; private string _connectionstring = null; /// 获取或设置日志记录。 public Logger Logger { get; set; } /// 超时设定。 public Timeout Timeout { get => _timeout; } /// 创建实例。 public MySql(string connnectionString, Timeout timeout = default) { _connectionstring = connnectionString; _timeout = timeout ?? Timeout.Default; } /// 获取当前的 MySqlConnection 对象。 public IDbConnection Connection { get => _connection; } /// 构建连接字符串以创建实例。 public MySql(string address, string store, string user, string pass, Timeout timeout = null) { _timeout = timeout ?? Timeout.Default; var a = address ?? ""; var s = store ?? ""; var u = user ?? ""; var p = pass ?? ""; var cs = $"server={a}; database={s}; uid={u}; pwd={p}; "; _connectionstring = cs; _storename = new Class(s); } #endregion #region 日志。 private void LogError(string action, Exception ex, string addtion) { var logger = Logger; if (logger != null) logger.Error(this, "MySQL", action, ex.GetType().FullName, ex.Message, addtion); } #endregion #region Connection private MySqlConnection _connection = null; /// public bool Online { get => _connection == null ? false : (_connection.State == ConnectionState.Open); } /// 连接字符串。 public string ConnectionString { get => _connectionstring; } /// public string Connect() { if (_connection == null) { _connection = new MySqlConnection(); _connection.ConnectionString = _connectionstring; } else { if (_connection.State == ConnectionState.Open) return null; } // try { _connection.Open(); switch (_connection.State) { case ConnectionState.Open: return null; default: return $"连接失败,当前处于 {_connection.State} 状态。"; } } // catch (Exception ex) // { // LogError("Connection", ex, _connection.ConnectionString); // Close(); // return false; // } } /// public void Close() { if (_connection != null) { if (_transaction != null) { if (_autocommit) Commit(); else Rollback(); } _connection.Close(); _connection.Dispose(); _connection = null; } } /// public void Dispose() { Close(); } #endregion #region Transaction private IDbTransaction _transaction = null; private bool _autocommit = false; /// 启动事务。 public string Begin(bool commit = true) => Begin(commit, null); /// 启动事务。 public string Begin(bool commit, Class isolation) { if (Connect() != null) return "未连接。"; if (_transaction != null) return "存在已启动的事务,无法再次启动。"; try { _transaction = isolation ? _connection.BeginTransaction(isolation.Value) : _connection.BeginTransaction(); _autocommit = commit; return null; } catch (Exception ex) { Logger.Error(nameof(MySql), "Commit", ex.Message()); return ex.Message(); } } /// 提交事务。 public string Commit() { if (_transaction == null) return "事务不存在。"; try { _transaction.Commit(); RuntimeUtility.Dispose(_transaction); _transaction = null; return null; } catch (Exception ex) { RuntimeUtility.Dispose(_transaction); _transaction = null; Logger.Error(nameof(MySql), "Commit", ex.Message()); return ex.Message(); } } /// 从挂起状态回滚事务。 public string Rollback() { if (_transaction == null) return "事务不存在。"; try { _transaction.Rollback(); RuntimeUtility.Dispose(_transaction); _transaction = null; return null; } catch (Exception ex) { RuntimeUtility.Dispose(_transaction); _transaction = null; Logger.Error(nameof(MySql), "Rollback", ex.Message()); return ex.Message(); } } #endregion #region SQL /// public IQuery Query(string sql, IEnumerable parameters) { if (sql.IsBlank()) return Example.InvalidQueryStatement; var connected = Connect(); if (connected.NotEmpty()) return Example.InvalidQueryConnection; try { using (var command = new MySqlCommand()) { command.Connection = _connection; command.CommandTimeout = _timeout.Query; command.CommandText = sql; if (parameters != null) { foreach (var p in parameters) { if (p != null) command.Parameters.Add(p); } } using (var ds = new DataSet()) { using (var da = new MySqlDataAdapter(sql, _connection)) { var name = "table_" + Guid.NewGuid().ToString("n"); da.Fill(ds, name); var table = ds.Tables[name]; return new Query(table); } } } } catch (Exception exception) { Logger.Error(nameof(MySql), "Query", exception, sql); return new Query(exception); } } /// public IExecute Execute(string sql, IEnumerable parameters) { if (sql.IsBlank()) return Example.InvalidExecuteStatement; var connected = Connect(); if (connected.NotEmpty()) return new Execute(false, connected); var inTransaction = _transaction != null; if (!inTransaction) Begin(); try { using (var command = new MySqlCommand()) { command.Connection = _connection; command.Transaction = (MySqlTransaction)_transaction; command.CommandTimeout = _timeout.Execute; command.CommandText = sql; if (parameters != null) { foreach (var parameter in parameters) { if (parameter == null) continue; command.Parameters.Add(parameter); } } var rows = command.ExecuteNonQuery(); if (!inTransaction) Commit(); // todo 此处应该检查事务提交产生的错误。 return new Execute(true, rows); } } catch (Exception exception) { Logger.Error(nameof(MySql), "Execute", exception, sql); if (!inTransaction) Rollback(); return new Execute(exception); } } /// public IQuery Query(string sql) => Query(sql, null); /// public IExecute Execute(string sql, IEnumerable parameters) { var dps = null as List; if (parameters != null) { var count = parameters.Count(); dps = new List(count); foreach (var p in parameters) { var dp = Parameter(p); dps.Add(dp); } } return Execute(sql, dps); } /// public IExecute Execute(string sql) => Execute(sql, null as IEnumerable); #endregion #region ORM private Class _storename = null; private string StoreName() { if (_storename) return _storename.Value; _storename = new Class(Internals.TextHelper.ParseConnectionString(_connectionstring).GetValue("database")); return _storename.Value ?? ""; } private string[] FirstColumn(string sql) { using (var query = Query(sql) as Query) return query.ReadColumn(); } /// public string[] TableNames() { var sql = TextUtility.Merge("select table_name from information_schema.tables where table_schema='", StoreName(), "' and table_type='base table';"); return FirstColumn(sql); } /// public string[] ViewNames() { var sql = TextUtility.Merge("select table_name from information_schema.tables where table_schema='", StoreName(), "' and table_type='view';"); return FirstColumn(sql); } /// public string[] ColumnNames(string table) { var sql = TextUtility.Merge("select column_name from information_schema.columns where table_schema='", StoreName(), "' and table_name='", TextUtility.AntiInject(table), "';"); return FirstColumn(sql); } /// 获取用于创建表的语句。 private string GetCreateStetement(TableStructure structure) { // 检查现存表。 var exists = false; var tables = TableNames(); if (tables.Length > 0) { var lower = structure.Name.ToLower(); foreach (var table in tables) { if (TextUtility.IsBlank(table)) continue; if (table.ToLower() == lower) { exists = true; break; } } } if (exists) { var columns = ColumnNames(structure.Name); if (columns.Length > 0) { var lower = new List(columns.Length); var added = 0; foreach (var column in columns) { if (TextUtility.IsBlank(column)) continue; lower.Add(column.ToLower()); added++; } lower.Capacity = added; columns = lower.ToArray(); } var sqlsb = new StringBuilder(); foreach (var column in structure.Columns) { // 检查 Independent 特性。 if (structure.Independent && column.Independent) continue; // 去重。 var lower = column.Field.ToLower(); if (columns.Contains(lower)) continue; var type = Declaration(column); if (type.IsEmpty()) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。"); // alter table `_record` add column `_index` bigint; sqlsb.Append("alter table `", structure.Name, "` add column ", type, "; "); } var sql = sqlsb.ToString(); return sql; } else { // create table _record (`_index` bigint, `_key` varchar(255), `_text` longtext) engine=innodb default charset=utf8mb4 var columns = new List(structure.Columns.Length); var columnsAdded = 0; var primarykey = null as string; foreach (var column in structure.Columns) { // 检查 Independent 特性。 if (structure.Independent && column.Independent) continue; // 字段。 var type = Declaration(column); if (type.IsEmpty()) return TextUtility.Merge("类型 ", column.Type.ToString(), " 不受支持。"); columns.Add(type); columnsAdded++; // 主键。 if (column.Property.Name == "Key") primarykey = column.Field; } columns.Capacity = columnsAdded; var table = structure.Name; var joined = string.Join(", ", columns); // 设置主键。 string sql; if (!structure.Independent && !string.IsNullOrEmpty(primarykey)) { sql = TextUtility.Merge("create table `", table, "`(", joined, ", primary key (", primarykey, ") ) engine=innodb default charset=utf8mb4; "); } else { sql = TextUtility.Merge("create table `", table, "`(", joined, ") engine=innodb default charset=utf8mb4; "); } return sql; } } /// private string Initialize(Type model, out string sql) { if (model == null) { sql = null; return "指定的类型无效。"; } var structure = TableStructure.Parse(model); if (structure == null) { sql = null; return "无法解析记录模型。"; } // 连接数据库。 var connect = Connect(); if (connect.NotEmpty()) { sql = null; return $"连接数据库失败。({connect})"; } sql = GetCreateStetement(structure); if (sql.NotEmpty()) { var execute = Execute(sql); if (!execute.Success) return execute.Message; } return null; } /// public string Initialize(Type model) => Initialize(model, out string sql); /// public string Initialize() where T : class, new() => Initialize(typeof(T)); /// public string Initialize(Record model) => (model == null) ? "参数无效。" : Initialize(model.GetType()); /// 插入记录。返回错误信息。 public string Insert(object record, string table = null) { if (record == null) return "参数无效。"; OrmHelper.FixProperties(record); var structure = TableStructure.Parse(record.GetType()); if (structure == null) return "无法解析记录模型。"; if (string.IsNullOrEmpty(table)) table = structure.Name; if (string.IsNullOrEmpty(table)) return "表名称无效。"; var ps = structure.CreateParameters(record, Parameter); var psc = ps.Length; if (psc < 1) return "数据模型不包含字段。"; var names = new List(psc); var values = new List(psc); foreach (var p in ps) { var pn = p.ParameterName; names.Add("`" + p + "`"); values.Add("@" + p); } var ns = string.Join(", ", names); var vs = string.Join(", ", values); var sql = $"insert into `{table}` ({ns}) values ({vs}); "; var execute = Execute(sql, ps); if (execute.Success) return TextUtility.Empty; return execute.Message; } /// 更新记录,实体中的 Key 属性不被更新。返回错误信息。 /// 无法更新带有 Independent 特性的模型(缺少 Key 属性)。 public string Update(IRecord record, string table = null) { if (record == null) return "参数无效。"; FixProperties(record); SetUpdated(record); var structure = TableStructure.Parse(record.GetType()); if (structure == null) return "无法解析记录模型。"; if (structure.Independent) return "无法更新带有 Independent 特性的模型。"; if (string.IsNullOrEmpty(table)) table = structure.Name; if (string.IsNullOrEmpty(table)) return "表名称无效。"; var ps = structure.CreateParameters(record, Parameter, "_key"); var psc = ps.Length; if (psc < 1) return "数据模型不包含字段。"; var items = new List(psc); foreach (var p in ps) { var pn = p.ParameterName; items.Add(TextUtility.Merge("`", pn, "` = @", pn)); } var key = record.Key.SafeKey(); var sql = $"update `{table}` set {string.Join(", ", items)} where `_key`='{key}'; "; var execute = Execute(sql, ps); if (execute.Success) return TextUtility.Empty; return execute.Message; } /// public Result Query(Type model, string sql) => OrmHelper.Query(this, model, sql); /// public Result Query(string sql) where T : class, new() { var query = Query(sql); if (!query.Success) return new Result(query.Message); var records = query.Fill(); query.Dispose(); var result = new Result(records); return result; } /// 获取所有记录。Flag 为 0 时将忽略 Flag 条件。 public Result Query(Type model, long flag = 0) => OrmHelper.Query(this, model, (tn) => { if (flag == 0) return $"select * from `{tn}`; "; return $"select * from `{tn}` where `_flag`={flag}; "; }); /// 获取所有记录。Flag 为 0 时将忽略 Flag 条件。 public Result Query(long flag = 0) where T : class, IRecord, new() => OrmHelper.Query(this, (tn) => { if (flag == 0) return $"select * from `{tn}`; "; return $"select * from `{tn}` where `_flag`={flag}; "; }); /// 获取记录。 /// 填充的记录模型。 /// 要跳过的记录数,可用最小值为 0。 /// 要获取的记录数,可用最小值为 1。 public Result Query(Type model, int skip, int count) { if (skip < 0) return new Result("参数 skip 超出了范围。"); if (count < 1) return new Result("参数 count 超出了范围。"); return OrmHelper.Query(this, model, (tn) => $"select * from `{tn}` limit {skip}, {count}; "); } /// 获取记录。 /// 要跳过的记录数,可用最小值为 0。 /// 要获取的记录数,可用最小值为 1。 public Result Query(int skip, int count) where T : class, IRecord, new() { if (skip < 0) return new Result("参数 skip 超出了范围。"); if (count < 1) return new Result("参数 count 超出了范围。"); return OrmHelper.Query(this, (tn) => $"select * from `{tn}` limit {skip}, {count}; "); } /// 获取记录。 public Result Get(Type model, string key, long flag = 0) => OrmHelper.Get(this, model, key, (tn, sk) => { if (flag == 0) return $"select * from `{tn}` where `_key`='{sk}' limit 1;"; return $"select * from `{tn}` where `_key`='{sk}' and `_flag`={flag} limit 1;"; }); /// 获取记录。 public Result Get(string key, long flag = 0) where T : class, IRecord, new() => OrmHelper.Get(this, key, (tn, sk) => { if (flag == 0) return $"select * from `{tn}` where `_key`='{sk}' limit 1;"; return $"select * from `{tn}` where `_key`='{sk}' and `_flag`={flag} limit 1;"; }); /// >获取指定类型的主键,按 Flag 属性筛选。 public Result Keys(Type model, long flag = 0) => OrmHelper.Keys(this, model, (tn) => { if (flag == 0) return $"select `_key` from `{tn}`;"; return $"select `_key` from `{tn}` where `_flag`={flag};"; }); /// >获取指定类型的主键,按 Flag 属性筛选。 public Result Keys(long flag = 0) where T : class, IRecord, new() => Keys(typeof(T), flag); /// 对表添加列,返回错误信息。 /// 记录类型。 /// 列名称。 /// 字段类型。 /// 字段长度,仅对 VarChar 和 NVarChar 类型有效。 /// public string AddColumn(string column, ColumnType type, int length = 0) where T : class, IRecord { var columnName = SafeColumn(column); if (columnName.IsEmpty()) return "列名无效。"; var ta = TableAttribute.Parse(typeof(T)); if (ta == null) return "无法解析记录模型。"; var tableName = ta.Name; var columeType = ""; switch (type) { case ColumnType.Integer: columeType = "bigint"; break; case ColumnType.Float: columeType = "double"; break; case ColumnType.Bytes: columeType = "longblob"; break; case ColumnType.DateTime: columeType = "datetime"; break; case ColumnType.VarChar: case ColumnType.NVarChar: columeType = $"varchar({length})"; break; case ColumnType.VarChar191: case ColumnType.NVarChar191: columeType = "varchar(191)"; break; case ColumnType.VarCharMax: case ColumnType.NVarCharMax: columeType = "varchar(max)"; break; case ColumnType.Text: columeType = "longtext"; break; } if (columeType.IsEmpty()) return "类型不支持。"; var sql = $"alter table `{tableName}` add {columnName} {columeType}; "; var execute = Execute(sql) as Execute; var error = execute.Message; return error; } #endregion #region static /// 对文本转义,符合 SQL 安全性。可根据字段类型限制 UTF-8 字节数,默认为 0 时不限制字节数。 public static string Escape(string text, int bytes = 0) { if (text.IsEmpty()) return ""; var t = text ?? ""; t = t.Replace("\\", "\\\\"); t = t.Replace("'", "\\'"); t = t.Replace("\n", "\\n"); t = t.Replace("\r", "\\r"); t = t.Replace("\b", "\\b"); t = t.Replace("\t", "\\t"); t = t.Replace("\f", "\\f"); if (bytes > 5) { if (t.Bytes(Encoding.UTF8).Length > bytes) { while (true) { t = t.Substring(0, t.Length - 1); if (t.Bytes(Encoding.UTF8).Length <= (bytes - 4)) break; } t = t + " ..."; } } return t; } /// public static string SafeTable(string table) { const string chars = "0123456789_-ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; var safety = TextUtility.Restrict(table, chars).Lower(); var pc = 0; for (var i = 0; i < safety.Length; i++) { if (safety[i] == '-') pc += 1; else break; } if (pc == safety.Length) return ""; if (pc > 0) safety = safety.Substring(pc); return safety; } /// public static string SafeColumn(string column) => SafeTable(column); /// /// /// internal static MySqlParameter Parameter(Parameter parameter) { if (parameter == null) throw new InvalidOperationException("参数无效。"); return Parameter(parameter.Name, parameter.Type, parameter.Size, parameter.Value); } /// internal static MySqlParameter Parameter(string name, ColumnType type, Int32 size, object value) { if (TextUtility.IsBlank(name)) return null; var dbtype = MySqlDbType.Int64; switch (type) { case ColumnType.Bytes: dbtype = MySqlDbType.LongBlob; break; case ColumnType.Integer: dbtype = MySqlDbType.Int64; break; case ColumnType.Float: dbtype = MySqlDbType.Double; break; case ColumnType.DateTime: dbtype = MySqlDbType.DateTime; break; case ColumnType.VarChar: case ColumnType.VarChar191: case ColumnType.VarCharMax: case ColumnType.NVarChar: case ColumnType.NVarChar191: case ColumnType.NVarCharMax: dbtype = MySqlDbType.VarChar; break; case ColumnType.Text: case ColumnType.NText: dbtype = MySqlDbType.LongText; break; default: throw new InvalidOperationException(TextUtility.Merge("类型 ", type.ToString(), " 不受支持。")); } switch (type) { case ColumnType.VarChar: case ColumnType.NVarChar: size = NumberUtility.Restrict(size, 0, 65535); break; case ColumnType.VarChar191: case ColumnType.NVarChar191: size = NumberUtility.Restrict(size, 0, 191); break; default: size = 0; break; } if (value is string && value != null && size > 0) { value = TextUtility.Left((string)value, size); } var parameter = new MySqlParameter(); parameter.ParameterName = name; parameter.MySqlDbType = dbtype; parameter.Value = value; if (size > 0) parameter.Size = size; return parameter; } /// internal static MySqlParameter Parameter(string name, MySqlDbType type, object value, Int32 size = 0) { var parameter = new MySqlParameter(); parameter.ParameterName = name; parameter.MySqlDbType = type; parameter.Value = value; if (size > 0) parameter.Size = size; return parameter; } private static string Declaration(ColumnAttribute column) { var type = TextUtility.Empty; var length = Math.Max(0, (int)column.Length); switch (column.Type) { case ColumnType.Integer: type = "bigint"; break; case ColumnType.Float: type = "double"; break; case ColumnType.Bytes: type = "longblob"; break; case ColumnType.DateTime: type = "datetime"; break; case ColumnType.VarChar: type = TextUtility.Merge("varchar(", Math.Max(65535, length).ToString(), ")"); break; case ColumnType.VarChar191: type = TextUtility.Merge("varchar(191)"); break; case ColumnType.VarCharMax: type = TextUtility.Merge("varchar(max)"); break; case ColumnType.Text: type = TextUtility.Merge("longtext"); break; case ColumnType.NVarChar: type = TextUtility.Merge("varchar(", Math.Min(65535, length).ToString(), ")"); break; case ColumnType.NVarChar191: type = TextUtility.Merge("varchar(191)"); break; case ColumnType.NVarCharMax: type = TextUtility.Merge("varchar(65535)"); break; case ColumnType.NText: type = TextUtility.Merge("longtext"); break; default: return TextUtility.Empty; } return TextUtility.Merge("`", (string)column.Field, "` ", type); } /// 获取每个数据库中,每个表的容量,单位为字节。 public static Dictionary> GetTablesCapacity(MySql source) { var result = new Dictionary>(); if (source != null && source.Connect().IsEmpty()) { var sql = "select `table_schema`, `table_name`, `engine`, `data_length`, `index_length` from `information_schema`.tables order by `table_schema`, `table_name`"; using (var query = (Query)source.Query(sql)) { for (var r = 0; r < query.Rows; r++) { var store = query.Text(r, "table_schema"); var table = query.Text(r, "table_name"); var engine = query.Text(r, "engine"); var capacity = NumberUtility.Int64(query.Text(r, "data_length")) + NumberUtility.Int64(query.Text(r, "index_length")); if (store == "mysql") continue; if (store == "information_schema") continue; if (store == "performance_schema") continue; if (engine != "MyISAM" && engine != "InnoDB") continue; if (!result.ContainsKey(store)) result.Add(store, new Dictionary()); if (!result[store].ContainsKey(table)) result[store].Add(table, 0L); result[store][table] = capacity; } } } return result; } #endregion } } #endif