Ejemplo n.º 1
0
        public bool ExistsTable(string name, bool ignoreCase)
        {
            if (string.IsNullOrEmpty(name))
            {
                return(false);
            }
            var tbname = _commonUtils.SplitTableName(name);

            if (tbname?.Length == 1)
            {
                var userId = (_orm.Ado.MasterPool as DamengConnectionPool)?.UserId;
                if (string.IsNullOrEmpty(userId))
                {
                    using (var conn = _orm.Ado.MasterPool.Get())
                    {
                        userId = DamengConnectionPool.GetUserId(conn.Value.ConnectionString);
                    }
                }
                tbname = new[] { userId, tbname[0] };
            }
            if (ignoreCase)
            {
                tbname = tbname.Select(a => a.ToLower()).ToArray();
            }
            var sql = $" select 1 from all_tab_comments where {(ignoreCase ? "lower(owner)" : "owner")}={_commonUtils.FormatSql("{0}", tbname[0])} and {(ignoreCase ? "lower(table_name)" : "table_name")}={_commonUtils.FormatSql("{0}", tbname[1])}";

            return(string.Concat(_orm.Ado.ExecuteScalar(CommandType.Text, sql)) == "1");
        }
Ejemplo n.º 2
0
        public DamengConnectionPool(string name, string connectionString, Action availableHandler, Action unavailableHandler) : base(null)
        {
            this.UserId = DamengConnectionPool.GetUserId(connectionString);

            this.availableHandler   = availableHandler;
            this.unavailableHandler = unavailableHandler;
            var policy = new DamengConnectionPoolPolicy
            {
                _pool = this,
                Name  = name
            };

            this.Policy             = policy;
            policy.ConnectionString = connectionString;
        }
Ejemplo n.º 3
0
 public DamengAdo(CommonUtils util, string masterConnectionString, string[] slaveConnectionStrings, Func <DbConnection> connectionFactory) : base(DataType.Dameng, masterConnectionString, slaveConnectionStrings)
 {
     base._util = util;
     if (connectionFactory != null)
     {
         MasterPool = new FreeSql.Internal.CommonProvider.DbConnectionPool(DataType.Dameng, connectionFactory);
         return;
     }
     if (!string.IsNullOrEmpty(masterConnectionString))
     {
         MasterPool = new DamengConnectionPool("主库", masterConnectionString, null, null);
     }
     if (slaveConnectionStrings != null)
     {
         foreach (var slaveConnectionString in slaveConnectionStrings)
         {
             var slavePool = new DamengConnectionPool($"从库{SlavePools.Count + 1}", slaveConnectionString, () => Interlocked.Decrement(ref slaveUnavailables), () => Interlocked.Increment(ref slaveUnavailables));
             SlavePools.Add(slavePool);
         }
     }
 }
Ejemplo n.º 4
0
        protected override string GetComparisonDDLStatements(params TypeAndName[] objects)
        {
            var userId = (_orm.Ado.MasterPool as DamengConnectionPool)?.UserId;

            if (string.IsNullOrEmpty(userId))
            {
                using (var conn = _orm.Ado.MasterPool.Get())
                {
                    userId = DamengConnectionPool.GetUserId(conn.Value.ConnectionString);
                }
            }
            var seqcols    = new List <NaviteTuple <ColumnInfo, string[], bool> >(); //序列:列,表,自增
            var seqnameDel = new List <string>();                                    //要删除的序列+触发器

            var sb        = new StringBuilder();
            var sbDeclare = new StringBuilder();

            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 = _commonUtils.SplitTableName(tb.DbName);
                if (tbname?.Length == 1)
                {
                    tbname = new[] { userId, tbname[0] }
                }
                ;

                var tboldname = _commonUtils.SplitTableName(tb.DbOldName); //旧表名
                if (tboldname?.Length == 1)
                {
                    tboldname = new[] { userId, tboldname[0] }
                }
                ;
                var primaryKeyName = (obj.entityType.GetCustomAttributes(typeof(OraclePrimaryKeyNameAttribute), false)?.FirstOrDefault() as OraclePrimaryKeyNameAttribute)?.Name;
                if (string.IsNullOrEmpty(obj.tableName) == false)
                {
                    var tbtmpname = _commonUtils.SplitTableName(obj.tableName);
                    if (tbtmpname?.Length == 1)
                    {
                        tbtmpname = new[] { userId, tbtmpname[0] }
                    }
                    ;
                    if (tbname[0] != tbtmpname[0] || tbname[1] != tbtmpname[1])
                    {
                        tbname         = tbtmpname;
                        tboldname      = null;
                        primaryKeyName = null;
                    }
                }
                //codefirst 不支持表名中带 .

                if (string.Compare(tbname[0], userId) != 0 && _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from sys.dba_users where username={0}", tbname[0])) == null) //创建数据库
                {
                    throw new NotImplementedException($"达梦 CodeFirst 不支持代码创建 tablespace 与 schemas {tbname[0]}");
                }

                var sbalter    = new StringBuilder();
                var istmpatler = false; //创建临时表,导入数据,删除旧表,修改
                if (_orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from all_tab_comments where owner={0} and table_name={1}", tbname)) == null)
                {                       //表不存在
                    if (tboldname != null)
                    {
                        if (_orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from all_tab_comments where owner={0} and table_name={1}", tboldname)) == null)
                        {
                            //模式或表不存在
                            tboldname = null;
                        }
                    }
                    if (tboldname == null)
                    {
                        //创建表
                        var createTableName = _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}");
                        sb.Append("execute immediate 'CREATE TABLE ").Append(createTableName).Append(" ( ");
                        foreach (var tbcol in tb.ColumnsByPosition)
                        {
                            sb.Append(" \r\n  ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType).Append(",");
                            if (tbcol.Attribute.IsIdentity == true)
                            {
                                seqcols.Add(NaviteTuple.Create(tbcol, tbname, true));
                            }
                        }
                        if (tb.Primarys.Any())
                        {
                            var pkname = primaryKeyName ?? $"{tbname[0]}_{tbname[1]}_pk1";
                            sb.Append(" \r\n  CONSTRAINT ").Append(_commonUtils.QuoteSqlName(pkname)).Append(" PRIMARY KEY (");
                            foreach (var tbcol in tb.Primarys)
                            {
                                sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
                            }
                            sb.Remove(sb.Length - 2, 2).Append("),");
                        }
                        sb.Remove(sb.Length - 1, 1);
                        sb.Append("\r\n) LOGGING ';\r\n");
                        //创建表的索引
                        foreach (var uk in tb.Indexes)
                        {
                            sb.Append("execute immediate 'CREATE ");
                            if (uk.IsUnique)
                            {
                                sb.Append("UNIQUE ");
                            }
                            sb.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(createTableName).Append("(");
                            foreach (var tbcol in uk.Columns)
                            {
                                sb.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
                                if (tbcol.IsDesc)
                                {
                                    sb.Append(" DESC");
                                }
                                sb.Append(", ");
                            }
                            sb.Remove(sb.Length - 2, 2).Append(")';\r\n");
                        }
                        //备注
                        foreach (var tbcol in tb.ColumnsByPosition)
                        {
                            if (string.IsNullOrEmpty(tbcol.Comment) == false)
                            {
                                sb.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment).Replace("'", "''")).Append("';\r\n");
                            }
                        }
                        if (string.IsNullOrEmpty(tb.Comment) == false)
                        {
                            sb.Append("execute immediate 'COMMENT ON TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tb.Comment).Replace("'", "''")).Append("';\r\n");
                        }
                        continue;
                    }
                    //如果新表,旧表在一个模式下,直接修改表名
                    if (string.Compare(tbname[0], tboldname[0], true) == 0)
                    {
                        sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tboldname[0]}.{tboldname[1]}")).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{tbname[1]}")).Append("';\r\n");
                    }
                    else
                    {
                        //如果新表,旧表不在一起,创建新表,导入数据,删除旧表
                        istmpatler = true;
                    }
                }
                else
                {
                    tboldname = null; //如果新表已经存在,不走改表名逻辑
                }
                //对比字段,只可以修改类型、增加字段、有限的修改字段名;保证安全不删除字段
                var sql      = _commonUtils.FormatSql($@"
select 
a.column_name,
a.data_type,
a.data_length,
a.data_precision,
a.data_scale,
a.char_used,
case when a.nullable = 'N' then 0 else 1 end,
nvl((select 1 from user_sequences where upper(sequence_name)=upper('{Utils.GetCsName((tboldname ?? tbname).Last())}_seq_'||a.column_name) and rownum < 2), 0),
nvl((select 1 from user_triggers where upper(trigger_name)=upper('{Utils.GetCsName((tboldname ?? tbname).Last())}_seq_'||a.column_name||'TI') and rownum < 2), 0),
b.comments
from all_tab_columns a
left join all_col_comments b on b.owner = a.owner and b.table_name = a.table_name and b.column_name = a.column_name
where a.owner={{0}} and a.table_name={{1}}", tboldname ?? tbname);
                var ds       = _orm.Ado.ExecuteArray(CommandType.Text, sql);
                var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a =>
                {
                    var sqlType = GetDamengSqlTypeFullName(a);
                    return(new
                    {
                        column = string.Concat(a[0]),
                        sqlType,
                        is_nullable = string.Concat(a[6]) == "1",
                        is_identity = string.Concat(a[7]) == "1" && string.Concat(a[8]) == "1",
                        comment = string.Concat(a[9])
                    });
                }, StringComparer.CurrentCultureIgnoreCase);

                if (istmpatler == false)
                {
                    foreach (var tbcol in tb.ColumnsByPosition)
                    {
                        var dbtypeNoneNotNull = Regex.Replace(tbcol.Attribute.DbType, @"NOT\s+NULL", "NULL");
                        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 ?? "");
                            if (tbcol.Attribute.DbType.StartsWith(tbstructcol.sqlType, StringComparison.CurrentCultureIgnoreCase) == false)
                            {
                                istmpatler = true;
                                if (istmpatler && tbcol.Attribute.DbType.StartsWith("varchar", StringComparison.CurrentCultureIgnoreCase) && tbstructcol.sqlType.StartsWith("varchar2", StringComparison.CurrentCultureIgnoreCase) &&
                                    Regex.Match(tbcol.Attribute.DbType, @"\(\d+").Groups[0].Value == Regex.Match(tbstructcol.sqlType, @"\(\d+").Groups[0].Value)
                                {
                                    istmpatler = false;
                                }
                                if (istmpatler && Regex.IsMatch(tbcol.Attribute.DbType, @"\(\d+") == false && Regex.IsMatch(tbstructcol.sqlType, @"\(\d+") &&
                                    string.Compare(tbcol.Attribute.DbType, Regex.Replace(tbstructcol.sqlType, @"\([^\)]+\)", ""), StringComparison.CurrentCultureIgnoreCase) == 0)
                                {
                                    istmpatler = false;
                                }
                                if (istmpatler)
                                {
                                    break;
                                }
                            }
                            //sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" MODIFY (").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(dbtypeNoneNotNull).Append(")';\r\n");
                            if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable)
                            {
                                if (tbcol.Attribute.IsNullable == false)
                                {
                                    sbalter.Append("execute immediate 'UPDATE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" = ").Append(tbcol.DbDefaultValue.Replace("'", "''")).Append(" WHERE ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" IS NULL';\r\n");
                                }
                                sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" MODIFY ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" ").Append(tbcol.Attribute.IsNullable == true ? "" : "NOT").Append(" NULL';\r\n");
                            }
                            if (string.Compare(tbstructcol.column, tbcol.Attribute.OldName, true) == 0)
                            {
                                if (tbstructcol.is_identity)
                                {
                                    seqnameDel.Add(Utils.GetCsName($"{tbname[1]}_seq_{tbstructcol.column}"));
                                }
                                //修改列名
                                sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" RENAME COLUMN ").Append(_commonUtils.QuoteSqlName(tbstructcol.column)).Append(" TO ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append("';\r\n");
                                if (tbcol.Attribute.IsIdentity)
                                {
                                    seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
                                }
                            }
                            else if (tbcol.Attribute.IsIdentity != tbstructcol.is_identity)
                            {
                                seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
                            }
                            if (isCommentChanged)
                            {
                                sbalter.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? "").Replace("'", "''")).Append("';\r\n");
                            }
                            continue;
                        }
                        //添加列
                        sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ADD (").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(dbtypeNoneNotNull).Append(")';\r\n");
                        if (tbcol.Attribute.IsNullable == false)
                        {
                            sbalter.Append("execute immediate 'UPDATE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" SET ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" = ").Append(tbcol.DbDefaultValue.Replace("'", "''")).Append("';\r\n");
                            sbalter.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" MODIFY ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" NOT NULL';\r\n");
                        }
                        if (tbcol.Attribute.IsIdentity == true)
                        {
                            seqcols.Add(NaviteTuple.Create(tbcol, tbname, tbcol.Attribute.IsIdentity == true));
                        }
                        if (string.IsNullOrEmpty(tbcol.Comment) == false)
                        {
                            sbalter.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment ?? "").Replace("'", "''")).Append("';\r\n");
                        }
                    }
                }
                if (istmpatler == false)
                {
                    var dsuksql = _commonUtils.FormatSql(@"
select
c.column_name,
a.index_name,
case when c.descend = 'DESC' then 1 else 0 end,
case when a.uniqueness = 'UNIQUE' then 1 else 0 end
from all_indexes a,
all_ind_columns c 
where a.index_name = c.index_name
and a.table_owner = c.table_owner
and a.table_name = c.table_name
and a.owner in ({0}) and a.table_name in ({1})
and not exists(select 1 from all_constraints where index_name = a.index_name and constraint_type = 'P')", tboldname ?? tbname);
                    var dsuk    = _orm.Ado.ExecuteArray(CommandType.Text, dsuksql).Select(a => new[] { string.Concat(a[0]).Trim('"'), string.Concat(a[1]), string.Concat(a[2]), string.Concat(a[3]) }).ToArray();
                    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 => uk.Columns.Where(b => (a[3] == "1") == uk.IsUnique && 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("execute immediate 'DROP INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append("';\r\n");
                            }
                            sbalter.Append("execute immediate 'CREATE ");
                            if (uk.IsUnique)
                            {
                                sbalter.Append("UNIQUE ");
                            }
                            sbalter.Append("INDEX ").Append(_commonUtils.QuoteSqlName(uk.Name)).Append(" ON ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append("(");
                            foreach (var tbcol in uk.Columns)
                            {
                                sbalter.Append(_commonUtils.QuoteSqlName(tbcol.Column.Attribute.Name));
                                if (tbcol.IsDesc)
                                {
                                    sbalter.Append(" DESC");
                                }
                                sbalter.Append(", ");
                            }
                            sbalter.Remove(sbalter.Length - 2, 2).Append(")';\r\n");
                        }
                    }
                }
                if (istmpatler == false)
                {
                    var dbcomment = string.Concat(_orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(@" select comments from all_tab_comments where owner = {0} and table_name = {1} and table_type = 'TABLE'", tbname[0], tbname[1])));
                    if (dbcomment != (tb.Comment ?? ""))
                    {
                        sb.Append("execute immediate 'COMMENT ON TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tb.Comment).Replace("'", "''")).Append("';\r\n");
                    }

                    sb.Append(sbalter);
                    continue;
                }
                var oldpk = _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(@" select constraint_name from user_constraints where owner={0} and table_name={1} and constraint_type='P'", tbname))?.ToString();
                //if (string.IsNullOrEmpty(oldpk) == false)
                //    sb.Append("execute immediate 'ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" DROP CONSTRAINT ").Append(_commonUtils.QuoteSqlName(oldpk)).Append("';\r\n");
                //执行失败(语句1) 试图删除聚集主键

                //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]}.FTmp_{tbname[1]}");
                //创建临时表
                sb.Append("execute immediate 'CREATE TABLE ").Append(tmptablename).Append(" ( ");
                foreach (var tbcol in tb.ColumnsByPosition)
                {
                    sb.Append(" \r\n  ").Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(" ").Append(tbcol.Attribute.DbType).Append(",");
                    if (tbcol.Attribute.IsIdentity == true)
                    {
                        seqcols.Add(NaviteTuple.Create(tbcol, tbname, true));
                    }
                }
                if (tb.Primarys.Any())
                {
                    var pkname = primaryKeyName ?? $"{tbname[0]}_{tbname[1]}_pk1";
                    if (string.IsNullOrEmpty(oldpk) == false && oldpk == pkname)
                    {
                        pkname = $"{pkname}1";
                    }
                    sb.Append(" \r\n  CONSTRAINT ").Append(_commonUtils.QuoteSqlName(pkname)).Append(" PRIMARY KEY (");
                    foreach (var tbcol in tb.Primarys)
                    {
                        sb.Append(_commonUtils.QuoteSqlName(tbcol.Attribute.Name)).Append(", ");
                    }
                    sb.Remove(sb.Length - 2, 2).Append("),");
                }
                sb.Remove(sb.Length - 1, 1);
                sb.Append("\r\n) LOGGING ';\r\n");
                //备注
                foreach (var tbcol in tb.ColumnsByPosition)
                {
                    if (string.IsNullOrEmpty(tbcol.Comment) == false)
                    {
                        sb.Append("execute immediate 'COMMENT ON COLUMN ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.FTmp_{tbname[1]}.{tbcol.Attribute.Name}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tbcol.Comment).Replace("'", "''")).Append("';\r\n");
                    }
                }
                if (string.IsNullOrEmpty(tb.Comment) == false)
                {
                    sb.Append("execute immediate 'COMMENT ON TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.FTmp_{tbname[1]}")).Append(" IS ").Append(_commonUtils.FormatSql("{0}", tb.Comment).Replace("'", "''")).Append("';\r\n");
                }

                sb.Append("execute immediate '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)
                        {
                            var dbtypeNoneNotNull = Regex.Replace(tbcol.Attribute.DbType, @"(NOT\s+)?NULL", "");
                            insertvalue = $"cast({insertvalue} as {dbtypeNoneNotNull})";
                        }
                        if (tbcol.Attribute.IsNullable != tbstructcol.is_nullable)
                        {
                            insertvalue = $"nvl({insertvalue},{tbcol.DbDefaultValue})";
                        }
                    }
                    else if (tbcol.Attribute.IsNullable == false)
                    {
                        insertvalue = tbcol.DbDefaultValue;
                    }
                    sb.Append(insertvalue.Replace("'", "''")).Append(", ");
                }
                sb.Remove(sb.Length - 2, 2).Append(" FROM ").Append(tablename).Append("';\r\n");
                sb.Append("execute immediate 'DROP TABLE ").Append(tablename).Append("';\r\n");
                sb.Append("execute immediate 'ALTER TABLE ").Append(tmptablename).Append(" RENAME TO ").Append(_commonUtils.QuoteSqlName($"{tbname[1]}")).Append("';\r\n");
                //创建表的索引
                foreach (var uk in tb.Indexes)
                {
                    sb.Append("execute immediate '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");
                }
            }
            Dictionary <string, bool> dicDeclare   = new Dictionary <string, bool>();
            Action <string>           dropSequence = seqname =>
            {
                if (dicDeclare.ContainsKey(seqname) == false)
                {
                    sbDeclare.Append("\r\nIS").Append(seqname).Append(" NUMBER; \r\n");
                    dicDeclare.Add(seqname, true);
                }
                sb.Append("IS").Append(seqname).Append(" := 0; \r\n")
                .Append(" select count(1) into IS").Append(seqname).Append(_commonUtils.FormatSql(" from user_sequences where sequence_name={0}; \r\n", seqname))
                .Append("if IS").Append(seqname).Append(" > 0 then \r\n")
                .Append("  execute immediate 'DROP SEQUENCE ").Append(_commonUtils.QuoteSqlName(seqname)).Append("';\r\n")
                .Append("end if; \r\n");
            };
            Action <string> dropTrigger = tiggerName =>
            {
                if (dicDeclare.ContainsKey(tiggerName) == false)
                {
                    sbDeclare.Append("\r\nIS").Append(tiggerName).Append(" NUMBER; \r\n");
                    dicDeclare.Add(tiggerName, true);
                }
                sb.Append("IS").Append(tiggerName).Append(" := 0; \r\n")
                .Append(" select count(1) into IS").Append(tiggerName).Append(_commonUtils.FormatSql(" from user_triggers where trigger_name={0}; \r\n", tiggerName))
                .Append("if IS").Append(tiggerName).Append(" > 0 then \r\n")
                .Append("  execute immediate 'DROP TRIGGER ").Append(_commonUtils.QuoteSqlName(tiggerName)).Append("';\r\n")
                .Append("end if; \r\n");
            };

            foreach (var seqname in seqnameDel)
            {
                dropSequence(seqname);
                dropTrigger(seqname + "TI");
            }
            foreach (var seqcol in seqcols)
            {
                var tbname     = seqcol.Item2;
                var seqname    = Utils.GetCsName($"{tbname[1]}_seq_{seqcol.Item1.Attribute.Name}").ToUpper();
                var tiggerName = seqname + "TI";
                var tbname2    = _commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}");
                var colname2   = _commonUtils.QuoteSqlName(seqcol.Item1.Attribute.Name);
                dropSequence(seqname);
                if (seqcol.Item3)
                {
                    var startWith = _orm.Ado.ExecuteScalar(CommandType.Text, _commonUtils.FormatSql(" select 1 from all_tab_columns where owner={0} and table_name={1} and column_name={2}", tbname[0], tbname[1], seqcol.Item1.Attribute.Name)) == null ? 1 :
                                    _orm.Ado.ExecuteScalar(CommandType.Text, $" select nvl(max({colname2})+1,1) from {tbname2}");
                    sb.Append("execute immediate 'CREATE SEQUENCE ").Append(_commonUtils.QuoteSqlName(seqname)).Append(" start with ").Append(startWith).Append("';\r\n");
                    sb.Append("execute immediate 'CREATE OR REPLACE TRIGGER ").Append(_commonUtils.QuoteSqlName(tiggerName))
                    .Append(" \r\nbefore insert on ").Append(tbname2)
                    .Append(" \r\nfor each row \r\nbegin\r\nselect ").Append(_commonUtils.QuoteSqlName(seqname))
                    .Append(".nextval into :new.").Append(colname2).Append(" from dual;\r\nend;';\r\n");
                }
                else
                {
                    dropTrigger(tiggerName);
                }
            }
            if (sbDeclare.Length > 0)
            {
                sbDeclare.Insert(0, "declare ");
            }
            return(sb.Length == 0 ? null : sb.Insert(0, "BEGIN \r\n").Insert(0, sbDeclare.ToString()).Append("END;").ToString());
        }