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FrameWork/SqlSugar/Realization/SqlServer/DbMaintenance/SqlServerDbMaintenance.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace SqlSugar
+{
+    public class SqlServerDbMaintenance : DbMaintenanceProvider
+    {
+        #region DML
+        protected override string GetColumnInfosByTableNameSql
+        {
+            get
+            {
+                string sql = @"SELECT sysobjects.name AS TableName,
+                           syscolumns.Id AS TableId,
+                           syscolumns.name AS DbColumnName,
+                           systypes.name AS DataType,
+                           syscolumns.length AS [Length],
+                           sys.extended_properties.[value] AS [ColumnDescription],
+                           syscomments.text AS DefaultValue,
+                           syscolumns.isnullable AS IsNullable,
+	                       columnproperty(syscolumns.id,syscolumns.name,'IsIdentity')as IsIdentity,
+                           (CASE
+                                WHEN EXISTS
+                                       ( 
+                                             	select 1
+												from sysindexes i
+												join sysindexkeys k on i.id = k.id and i.indid = k.indid
+												join sysobjects o on i.id = o.id
+												join syscolumns c on i.id=c.id and k.colid = c.colid
+												where o.xtype = 'U' 
+												and exists(select 1 from sysobjects where xtype = 'PK' and name = i.name) 
+												and o.name=sysobjects.name and c.name=syscolumns.name
+                                       ) THEN 1
+                                ELSE 0
+                            END) AS IsPrimaryKey
+                    FROM syscolumns
+                    INNER JOIN systypes ON syscolumns.xtype = systypes.xtype
+                    LEFT JOIN sysobjects ON syscolumns.id = sysobjects.id
+                    LEFT OUTER JOIN sys.extended_properties ON (sys.extended_properties.minor_id = syscolumns.colid
+                                                                AND sys.extended_properties.major_id = syscolumns.id)
+                    LEFT OUTER JOIN syscomments ON syscolumns.cdefault = syscomments.id
+                    WHERE syscolumns.id IN
+                        (SELECT id
+                         FROM sysobjects
+                         WHERE xtype IN('u',
+                                        'v') )
+                      AND (systypes.name <> 'sysname')
+                      AND sysobjects.name='{0}'
+                      AND systypes.name<>'geometry'
+                      AND systypes.name<>'geography'
+                    ORDER BY syscolumns.colid";
+                return sql;
+            }
+        }
+        protected override string GetTableInfoListSql
+        {
+            get
+            {
+                return @"SELECT s.Name,Convert(varchar(max),tbp.value) as Description
+                            FROM sysobjects s
+					     	LEFT JOIN sys.extended_properties as tbp ON s.id=tbp.major_id and tbp.minor_id=0 AND (tbp.Name='MS_Description' OR tbp.Name is null)  WHERE s.xtype IN('U') ";
+            }
+        }
+        protected override string GetViewInfoListSql
+        {
+            get
+            {
+                return @"SELECT s.Name,Convert(varchar(max),tbp.value) as Description
+                            FROM sysobjects s
+					     	LEFT JOIN sys.extended_properties as tbp ON s.id=tbp.major_id and tbp.minor_id=0  AND (tbp.Name='MS_Description' OR tbp.Name is null) WHERE s.xtype IN('V')  ";
+            }
+        }
+        #endregion
+
+        #region DDL
+        protected override string AddPrimaryKeySql
+        {
+            get
+            {
+                return "ALTER TABLE {0} ADD CONSTRAINT {1} PRIMARY KEY({2})";
+            }
+        }
+        protected override string AddColumnToTableSql
+        {
+            get
+            {
+                return "ALTER TABLE {0} ADD {1} {2}{3} {4} {5} {6}";
+            }
+        }
+        protected override string AlterColumnToTableSql
+        {
+            get
+            {
+                return "ALTER TABLE {0} ALTER COLUMN {1} {2}{3} {4} {5} {6}";
+            }
+        }
+        protected override string BackupDataBaseSql
+        {
+            get
+            {
+                return @"USE master;BACKUP DATABASE {0} TO disk = '{1}'";
+            }
+        }
+        protected override string CreateTableSql
+        {
+            get
+            {
+                return "CREATE TABLE {0}(\r\n{1})";
+            }
+        }
+        protected override string CreateTableColumn
+        {
+            get
+            {
+                return "{0} {1}{2} {3} {4} {5}";
+            }
+        }
+        protected override string TruncateTableSql
+        {
+            get
+            {
+                return "TRUNCATE TABLE {0}";
+            }
+        }
+        protected override string BackupTableSql
+        {
+            get
+            {
+                return "SELECT TOP {0} *　INTO {1} FROM  {2}";
+            }
+        }
+        protected override string DropTableSql
+        {
+            get
+            {
+                return "DROP TABLE {0}";
+            }
+        }
+        protected override string DropColumnToTableSql
+        {
+            get
+            {
+                return "ALTER TABLE {0} DROP COLUMN {1}";
+            }
+        }
+        protected override string DropConstraintSql
+        {
+            get
+            {
+                return "ALTER TABLE {0} DROP CONSTRAINT  {1}";
+            }
+        }
+        protected override string RenameColumnSql
+        {
+            get
+            {
+                return "exec sp_rename '{0}.{1}','{2}','column';";
+            }
+        }
+        #endregion
+
+        #region Check
+        protected override string CheckSystemTablePermissionsSql
+        {
+            get
+            {
+                return "select top 1 id from sysobjects";
+            }
+        }
+        #endregion
+
+        #region Scattered
+        protected override string CreateTableNull
+        {
+            get
+            {
+                return "NULL";
+            }
+        }
+        protected override string CreateTableNotNull
+        {
+            get
+            {
+                return "NOT NULL";
+            }
+        }
+        protected override string CreateTablePirmaryKey
+        {
+            get
+            {
+                return "PRIMARY KEY";
+            }
+        }
+        protected override string CreateTableIdentity
+        {
+            get
+            {
+                return "IDENTITY(1,1)";
+            }
+        }
+        #endregion
+
+        public override bool CreateTable(string tableName, List<DbColumnInfo> columns, bool isCreatePrimaryKey = true)
+        {
+            tableName = this.SqlBuilder.GetTranslationTableName(tableName);
+            string sql = GetCreateTableSql(tableName, columns);
+            this.Context.Ado.ExecuteCommand(sql);
+            if (isCreatePrimaryKey) {
+                var pkColumns = columns.Where(it => it.IsPrimarykey).ToList();
+                foreach (var item in pkColumns)
+                {
+                    this.Context.DbMaintenance.AddPrimaryKey(tableName, item.DbColumnName);
+                }
+            }
+            return true;
+        }
+    }
+}