using FreeSql.DataAnnotations; using FreeSql.DatabaseModel; using FreeSql.Internal; using FreeSql.Internal.Model; using MySql.Data.MySqlClient; using System; using System.Collections.Concurrent; using System.Collections.Generic; using System.Data; using System.Linq; using System.Text; using System.Text.RegularExpressions; namespace FreeSql.MySql { class MySqlCodeFirst : Internal.CommonProvider.CodeFirstProvider { public MySqlCodeFirst(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression) : base(orm, commonUtils, commonExpression) { } static object _dicCsToDbLock = new object(); static Dictionary _dicCsToDb = new Dictionary() { { typeof(bool).FullName, (MySqlDbType.Bit, "bit","bit(1) NOT NULL", null, false, false) },{ typeof(bool?).FullName, (MySqlDbType.Bit, "bit","bit(1)", null, true, null) }, { typeof(sbyte).FullName, (MySqlDbType.Byte, "tinyint", "tinyint(3) NOT NULL", false, false, 0) },{ typeof(sbyte?).FullName, (MySqlDbType.Byte, "tinyint", "tinyint(3)", false, true, null) }, { typeof(short).FullName, (MySqlDbType.Int16, "smallint","smallint(6) NOT NULL", false, false, 0) },{ typeof(short?).FullName, (MySqlDbType.Int16, "smallint", "smallint(6)", false, true, null) }, { typeof(int).FullName, (MySqlDbType.Int32, "int", "int(11) NOT NULL", false, false, 0) },{ typeof(int?).FullName, (MySqlDbType.Int32, "int", "int(11)", false, true, null) }, { typeof(long).FullName, (MySqlDbType.Int64, "bigint","bigint(20) NOT NULL", false, false, 0) },{ typeof(long?).FullName, (MySqlDbType.Int64, "bigint","bigint(20)", false, true, null) }, { typeof(byte).FullName, (MySqlDbType.UByte, "tinyint","tinyint(3) unsigned NOT NULL", true, false, 0) },{ typeof(byte?).FullName, (MySqlDbType.UByte, "tinyint","tinyint(3) unsigned", true, true, null) }, { typeof(ushort).FullName, (MySqlDbType.UInt16, "smallint","smallint(5) unsigned NOT NULL", true, false, 0) },{ typeof(ushort?).FullName, (MySqlDbType.UInt16, "smallint", "smallint(5) unsigned", true, true, null) }, { typeof(uint).FullName, (MySqlDbType.UInt32, "int", "int(10) unsigned NOT NULL", true, false, 0) },{ typeof(uint?).FullName, (MySqlDbType.UInt32, "int", "int(10) unsigned", true, true, null) }, { typeof(ulong).FullName, (MySqlDbType.UInt64, "bigint", "bigint(20) unsigned NOT NULL", true, false, 0) },{ typeof(ulong?).FullName, (MySqlDbType.UInt64, "bigint", "bigint(20) unsigned", true, true, null) }, { typeof(double).FullName, (MySqlDbType.Double, "double", "double NOT NULL", false, false, 0) },{ typeof(double?).FullName, (MySqlDbType.Double, "double", "double", false, true, null) }, { typeof(float).FullName, (MySqlDbType.Float, "float","float NOT NULL", false, false, 0) },{ typeof(float?).FullName, (MySqlDbType.Float, "float","float", false, true, null) }, { typeof(decimal).FullName, (MySqlDbType.Decimal, "decimal", "decimal(10,2) NOT NULL", false, false, 0) },{ typeof(decimal?).FullName, (MySqlDbType.Decimal, "decimal", "decimal(10,2)", false, true, null) }, { typeof(TimeSpan).FullName, (MySqlDbType.Time, "time","time NOT NULL", false, false, 0) },{ typeof(TimeSpan?).FullName, (MySqlDbType.Time, "time", "time",false, true, null) }, { typeof(DateTime).FullName, (MySqlDbType.DateTime, "datetime(3)", "datetime(3) NOT NULL", false, false, new DateTime(1970,1,1)) },{ typeof(DateTime?).FullName, (MySqlDbType.DateTime, "datetime(3)", "datetime(3)", false, true, null) }, { typeof(byte[]).FullName, (MySqlDbType.VarBinary, "varbinary", "varbinary(255)", false, null, new byte[0]) }, { typeof(string).FullName, (MySqlDbType.VarChar, "varchar", "varchar(255)", false, null, "") }, { typeof(Guid).FullName, (MySqlDbType.VarChar, "char", "char(36) NOT NULL", false, false, Guid.Empty) },{ typeof(Guid?).FullName, (MySqlDbType.VarChar, "char", "char(36)", false, true, null) }, { typeof(MygisPoint).FullName, (MySqlDbType.Geometry, "point", "point", false, null, new MygisPoint(0, 0)) }, { typeof(MygisLineString).FullName, (MySqlDbType.Geometry, "linestring", "linestring", false, null, new MygisLineString(new[]{new MygisCoordinate2D(),new MygisCoordinate2D()})) }, { typeof(MygisPolygon).FullName, (MySqlDbType.Geometry, "polygon", "polygon", false, null, new MygisPolygon(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}})) }, { typeof(MygisMultiPoint).FullName, (MySqlDbType.Geometry, "multipoint","multipoint", false, null, new MygisMultiPoint(new[]{new MygisCoordinate2D(),new MygisCoordinate2D()})) }, { typeof(MygisMultiLineString).FullName, (MySqlDbType.Geometry, "multilinestring","multilinestring", false, null, new MygisMultiLineString(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}})) }, { typeof(MygisMultiPolygon).FullName, (MySqlDbType.Geometry, "multipolygon", "multipolygon", false, null, new MygisMultiPolygon(new[]{new MygisPolygon(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}}),new MygisPolygon(new[]{new[]{new MygisCoordinate2D(),new MygisCoordinate2D()},new[]{new MygisCoordinate2D(),new MygisCoordinate2D()}})})) }, }; public override (int type, string dbtype, string dbtypeFull, bool? isnullable, object defaultValue)? GetDbInfo(Type type) { if (_dicCsToDb.TryGetValue(type.FullName, out var trydc)) return new (int, string, string, bool?, object)?(((int)trydc.type, trydc.dbtype, trydc.dbtypeFull, trydc.isnullable, trydc.defaultValue)); if (type.IsArray) return null; var enumType = type.IsEnum ? type : null; if (enumType == null && type.IsNullableType()) { var genericTypes = type.GetGenericArguments(); if (genericTypes.Length == 1 && genericTypes.First().IsEnum) enumType = genericTypes.First(); } if (enumType != null) { var names = string.Join(",", Enum.GetNames(enumType).Select(a => _commonUtils.FormatSql("{0}", a))); var newItem = enumType.GetCustomAttributes(typeof(FlagsAttribute), false).Any() ? (MySqlDbType.Set, "set", $"set({names}){(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0)) : (MySqlDbType.Enum, "enum", $"enum({names}){(type.IsEnum ? " NOT NULL" : "")}", false, type.IsEnum ? false : true, Enum.GetValues(enumType).GetValue(0)); if (_dicCsToDb.ContainsKey(type.FullName) == false) { lock (_dicCsToDbLock) { if (_dicCsToDb.ContainsKey(type.FullName) == false) _dicCsToDb.Add(type.FullName, newItem); } } return ((int)newItem.Item1, newItem.Item2, newItem.Item3, newItem.Item5, newItem.Item6); } return null; } protected override string GetComparisonDDLStatements(params (Type entityType, string tableName)[] objects) { var conn = _orm.Ado.MasterPool.Get(TimeSpan.FromSeconds(5)); var database = conn.Value.Database; Func ExecuteScalar = (db, sql) => { if (string.Compare(database, db) != 0) conn.Value.ChangeDatabase(db); try { using (var cmd = conn.Value.CreateCommand()) { cmd.CommandText = sql; cmd.CommandType = CommandType.Text; return cmd.ExecuteScalar(); } } finally { if (string.Compare(database, db) != 0) conn.Value.ChangeDatabase(database); } }; var sb = new StringBuilder(); try { foreach (var obj in objects) { if (sb.Length > 0) sb.Append("\r\n"); var tb = _commonUtils.GetTableByEntity(obj.entityType); if (tb == null) throw new Exception($"类型 {obj.entityType.FullName} 不可迁移"); if (tb.Columns.Any() == false) throw new Exception($"类型 {obj.entityType.FullName} 不可迁移，可迁移属性0个"); var tbname = tb.DbName.Split(new[] { '.' }, 2); if (tbname?.Length == 1) tbname = new[] { database, tbname[0] }; var tboldname = tb.DbOldName?.Split(new[] { '.' }, 2); //旧表名 if (tboldname?.Length == 1) tboldname = new[] { database, tboldname[0] }; if (string.IsNullOrEmpty(obj.tableName) == false) { var tbtmpname = obj.tableName.Split(new[] { '.' }, 2); if (tbtmpname?.Length == 1) tbtmpname = new[] { database, tbtmpname[0] }; if (tbname[0] != tbtmpname[0] || tbname[1] != tbtmpname[1]) { tbname = tbtmpname; tboldname = null; } } if (string.Compare(tbname[0], database, true) != 0 && ExecuteScalar(database, _commonUtils.FormatSql(" select 1 from information_schema.schemata where schema_name={0}", tbname[0])) == null) //创建数据库 sb.Append($"CREATE DATABASE IF NOT EXISTS ").Append(_commonUtils.QuoteSqlName(tbname[0])).Append(" default charset utf8 COLLATE utf8_general_ci;\r\n"); var sbalter = new StringBuilder(); var istmpatler = false; //创建临时表，导入数据，删除旧表，修改 if (ExecuteScalar(tbname[0], _commonUtils.FormatSql(" SELECT 1 FROM information_schema.TABLES WHERE table_schema={0} and table_name={1}", tbname)) == null) { //表不存在 if (tboldname != null) { if (string.Compare(tboldname[0], tbname[0], true) != 0 && ExecuteScalar(database, _commonUtils.FormatSql(" select 1 from information_schema.schemata where schema_name={0}", tboldname[0])) == null || ExecuteScalar(tboldname[0], _commonUtils.FormatSql(" SELECT 1 FROM information_schema.TABLES WHERE table_schema={0} and table_name={1}", tboldname)) == null) //数据库或表不存在 tboldname = null; } if (tboldname == null) { //创建表 var createTableName = _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}"); sb.Append("CREATE TABLE IF NOT EXISTS ").Append(createTableName).Append(" ( "); foreach (var tbcol in tb.ColumnsByPosition) { sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType); if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" AUTO_INCREMENT"); if (string.IsNullOrEmpty(tbcol.Comment) == false) sb.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)); sb.Append(","); } if (tb.Primarys.Any()) { sb.Append(" \r\n PRIMARY KEY ("); foreach (var tbcol in tb.Primarys) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", "); sb.Remove(sb.Length - 2, 2).Append("),"); } sb.Remove(sb.Length - 1, 1); sb.Append("\r\n) Engine=InnoDB;\r\n"); //创建表的索引 foreach (var uk in tb.Indexes) { sb.Append("CREATE "); if (uk.IsUnique) sb.Append("UNIQUE "); sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(createTableName).Append("("); foreach (var tbcol in uk.Columns) { sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name)); if (tbcol.IsDesc) sb.Append(" DESC"); sb.Append(", "); } sb.Remove(sb.Length - 2, 2).Append(");\r\n"); } continue; } //如果新表，旧表在一个数据库下，直接修改表名 if (string.Compare(tbname[0], tboldname[0], true) == 0) sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}")).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(";\r\n"); else { //如果新表，旧表不在一起，创建新表，导入数据，删除旧表 istmpatler = true; } } else tboldname = null; //如果新表已经存在，不走改表名逻辑 //对比字段，只可以修改类型、增加字段、有限的修改字段名；保证安全不删除字段 var sql = _commonUtils.FormatSql(@" select a.column_name, a.column_type, case when a.is_nullable = 'YES' then 1 else 0 end 'is_nullable', case when locate('auto_increment', a.extra) > 0 then 1 else 0 end 'is_identity', a.column_comment 'comment' from information_schema.columns a where a.table_schema in ({0}) and a.table_name in ({1})", tboldname ?? tbname); var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql); var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a => { var a1 = string.Concat(a[1]); if (a1 == "datetime") a1 = string.Concat(a1, "(0)"); return new { column = string.Concat(a[0]), sqlType = a1, is_nullable = string.Concat(a[2]) == "1", is_identity = string.Concat(a[3]) == "1", is_unsigned = string.Concat(a[1]).EndsWith(" unsigned"), comment = string.Concat(a[4]) }; }, StringComparer.CurrentCultureIgnoreCase); if (istmpatler == false) { var existsPrimary = ExecuteScalar(tbname[0], _commonUtils.FormatSql(" select 1 from information_schema.key_column_usage where table_schema={0} and table_name={1} and constraint_name = 'PRIMARY' limit 1", tbname)); foreach (var tbcol in tb.ColumnsByPosition) { var isIdentityChanged = tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1; if (tbstruct.TryGetValue(tbcol.Attribute.Name, out var tbstructcol) || string.IsNullOrEmpty(tbcol.Attribute.OldName) == false && tbstruct.TryGetValue(tbcol.Attribute.OldName, out tbstructcol)) { var isCommentChanged = tbstructcol.comment != (tbcol.Comment ?? ""); var isDbTypeChanged = tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false; if (tbstructcol.sqlType == "datetime(0)" && Regex.IsMatch(tbcol.Attribute.DbType, @"datetime\s+\(", RegexOptions.IgnoreCase) == false) isDbTypeChanged = tbcol.Attribute.DbType.StartsWith("datetime", StringComparison.CurrentCultureIgnoreCase) == false; if ((tbcol.Attribute.DbType.IndexOf(" unsigned", StringComparison.CurrentCultureIgnoreCase) != -1) != tbstructcol.is_unsigned || isDbTypeChanged || tbcol.Attribute.IsNullable != tbstructcol.is_nullable || tbcol.Attribute.IsIdentity != tbstructcol.is_identity || isCommentChanged) { if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable && tbcol.Attribute.IsNullable == false && tbcol.DbDefaultValue != "NULL" && tbcol.Attribute.IsIdentity == false) sbalter.Append("UPDATE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" = ").Append(tbcol.DbDefaultValue).Append(" WHERE ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" IS NULL;\r\n"); sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" MODIFY ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(tbcol.Attribute.DbType); if (string.IsNullOrEmpty(tbcol.Comment) == false) sbalter.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? "")); if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sbalter.Append(" AUTO_INCREMENT"); if (tbcol.Attribute.IsIdentity == true) sbalter.Append(existsPrimary == null ? "" : ", DROP PRIMARY KEY").Append(", ADD PRIMARY KEY(").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(")"); sbalter.Append(";\r\n"); } if (string.Compare(tbstructcol.column, tbcol.Attribute.OldName, true) == 0) { //修改列名 sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" CHANGE COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType); if (string.IsNullOrEmpty(tbcol.Comment) == false) sbalter.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? "")); if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sbalter.Append(" AUTO_INCREMENT"); if (tbcol.Attribute.IsIdentity == true) sbalter.Append(existsPrimary == null ? "" : ", DROP PRIMARY KEY").Append(", ADD PRIMARY KEY(").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(")"); sbalter.Append(";\r\n"); } continue; } //添加列 sbalter.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ADD ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType); if (tbcol.Attribute.IsNullable == false && tbcol.DbDefaultValue != "NULL" && tbcol.Attribute.IsIdentity == false) sbalter.Append(" DEFAULT ").Append(tbcol.DbDefaultValue); if (string.IsNullOrEmpty(tbcol.Comment) == false) sbalter.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? "")); if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sbalter.Append(" AUTO_INCREMENT"); if (tbcol.Attribute.IsIdentity == true) sbalter.Append(existsPrimary == null ? "" : ", DROP PRIMARY KEY").Append(", ADD PRIMARY KEY(").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(")"); sbalter.Append(";\r\n"); } var dsuksql = _commonUtils.FormatSql(@" select a.column_name, a.index_name 'index_id', 0 'IsDesc', case when a.non_unique = 0 then 1 else 0 end 'IsUnique' from information_schema.statistics a where a.table_schema IN ({0}) and a.table_name IN ({1}) and a.index_name <> 'PRIMARY'", tboldname ?? tbname); var dsuk = _orm.Ado.ExecuteArray(CommandType.Text, dsuksql).Select(a => new[] { string.Concat(a[0]), string.Concat(a[1]), string.Concat(a[2]), string.Concat(a[3]) }); foreach (var uk in tb.Indexes) { if (string.IsNullOrEmpty(uk.Name) || uk.Columns.Any() == false) continue; var dsukfind1 = dsuk.Where(a => string.Compare(a[1], uk.Name, true) == 0).ToArray(); if (dsukfind1.Any() == false || dsukfind1.Length != uk.Columns.Length || dsukfind1.Where(a => (a[3] == "1") == uk.IsUnique && uk.Columns.Where(b => string.Compare(b.Column.Attribute.Name, a[0], true) == 0 && (a[2] == "1") == b.IsDesc).Any()).Count() != uk.Columns.Length) { if (dsukfind1.Any()) sbalter.Append("DROP INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(";\r\n"); sbalter.Append("CREATE "); if (uk.IsUnique) sbalter.Append("UNIQUE "); sbalter.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append("("); foreach (var tbcol in uk.Columns) { sbalter.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name)); if (tbcol.IsDesc) sbalter.Append(" DESC"); sbalter.Append(", "); } sbalter.Remove(sbalter.Length - 2, 2).Append(");\r\n"); } } } if (istmpatler == false) { sb.Append(sbalter); continue; } //创建临时表，数据导进临时表，然后删除原表，将临时表改名为原表名 var tablename = tboldname == null ? _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}") : _commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}"); var tmptablename = _commonUtils.QuoteSqlName($"{tbname[0]}.FreeSqlTmp_{tbname[1]}"); //创建临时表 sb.Append("CREATE TABLE IF NOT EXISTS ").Append(tmptablename).Append(" ( "); foreach (var tbcol in tb.ColumnsByPosition) { sb.Append(" \r\n ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType); if (tbcol.Attribute.IsIdentity == true && tbcol.Attribute.DbType.IndexOf("AUTO_INCREMENT", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" AUTO_INCREMENT"); if (string.IsNullOrEmpty(tbcol.Comment) == false) sb.Append(" COMMENT ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment)); sb.Append(","); } if (tb.Primarys.Any()) { sb.Append(" \r\n PRIMARY KEY ("); foreach (var tbcol in tb.Primarys) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", "); sb.Remove(sb.Length - 2, 2).Append("),"); } sb.Remove(sb.Length - 1, 1); sb.Append("\r\n) Engine=InnoDB;\r\n"); sb.Append("INSERT INTO ").Append(tmptablename).Append(" ("); foreach (var tbcol in tb.ColumnsByPosition) sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", "); sb.Remove(sb.Length - 2, 2).Append(")\r\nSELECT "); foreach (var tbcol in tb.ColumnsByPosition) { var insertvalue = "NULL"; if (tbstruct.TryGetValue(tbcol.Attribute.Name, out var tbstructcol) || string.IsNullOrEmpty(tbcol.Attribute.OldName) == false && tbstruct.TryGetValue(tbcol.Attribute.OldName, out tbstructcol)) { insertvalue = _commonUtils.QuoteSqlName(tbstructcol.column); if (tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false) { //insertvalue = $"cast({insertvalue} as {tbcol.Attribute.DbType.Split(' ').First()})"; } if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable) insertvalue = $"ifnull({insertvalue},{tbcol.DbDefaultValue})"; } else if (tbcol.Attribute.IsNullable == false) if (tbcol.DbDefaultValue != "NULL" && tbcol.Attribute.IsIdentity == false) insertvalue = tbcol.DbDefaultValue; sb.Append(insertvalue).Append(", "); } sb.Remove(sb.Length - 2, 2).Append(" FROM ").Append(tablename).Append(";\r\n"); sb.Append("DROP TABLE ").Append(tablename).Append(";\r\n"); sb.Append("ALTER TABLE ").Append(tmptablename).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(";\r\n"); //创建表的索引 foreach (var uk in tb.Indexes) { sb.Append("CREATE "); if (uk.IsUnique) sb.Append("UNIQUE "); sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(tablename).Append("("); foreach (var tbcol in uk.Columns) { sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name)); if (tbcol.IsDesc) sb.Append(" DESC"); sb.Append(", "); } sb.Remove(sb.Length - 2, 2).Append(");\r\n"); } } return sb.Length == 0 ? null : sb.ToString(); } finally { try { conn.Value.ChangeDatabase(database); _orm.Ado.MasterPool.Return(conn); } catch { _orm.Ado.MasterPool.Return(conn, true); } } } } }