Refactoring migrations by adding an abstract class to all expressions that allow for processing prior to returning an sql statement.

Refactoring the current sql syntax providers to better work with sql ce, sql server and mysql.
Adding migrations for v4.8 and v6.0.
Adding test cases for upgrading from 4.7 to 6.0 for the 3 database providers - sql ce, sql server and mysql.
Adding product name to the MigrationAttribute, which adds more flexibility to the MigrationRunner.
Fixing schema creation for mysql, which broke during a previous refactor task.

src/Umbraco.Core/Persistence/SqlSyntax/MySqlSyntaxProvider.cs

@@ -29,13 +29,35 @@ namespace Umbraco.Core.Persistence.SqlSyntax
             AutoIncrementDefinition = "AUTO_INCREMENT";
             IntColumnDefinition = "int(11)";
             BoolColumnDefinition = "tinyint(1)";
+            DateTimeColumnDefinition = "TIMESTAMP";
             TimeColumnDefinition = "time";
             DecimalColumnDefinition = "decimal(38,6)";
-            GuidColumnDefinition = "char(32)";
+            GuidColumnDefinition = "char(36)";
             
             InitColumnTypeMap();
 
-            DefaultValueFormat = " DEFAULT '{0}'";
+            DefaultValueFormat = "DEFAULT '{0}'";
+        }
+
+        public override bool DoesTableExist(Database db, string tableName)
+        {
+            db.OpenSharedConnection();
+            var result =
+                db.ExecuteScalar<long>("SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES " +
+                "WHERE TABLE_NAME = @TableName AND " +
+                "TABLE_SCHEMA = @TableSchema", new { TableName = tableName, TableSchema = db.Connection.Database });
+
+            return result > 0;
+        }
+
+        public override bool SupportsClustered()
+        {
+            return true;
+        }
+
+        public override bool SupportsIdentityInsert()
+        {
+            return false;
         }
 
         public override string GetQuotedTableName(string tableName)
@@ -65,6 +87,24 @@ namespace Umbraco.Core.Persistence.SqlSyntax
             return "NVARCHAR";
         }
 
+        public override string Format(TableDefinition table)
+        {
+            string primaryKey = string.Empty;
+            var columnDefinition = table.Columns.FirstOrDefault(x => x.IsPrimaryKey);
+            if (columnDefinition != null && columnDefinition.PrimaryKeyColumns.Contains(",") == false)
+            {
+                string columns = string.IsNullOrEmpty(columnDefinition.PrimaryKeyColumns)
+                                 ? GetQuotedColumnName(columnDefinition.Name)
+                                 : columnDefinition.PrimaryKeyColumns;
+
+                primaryKey = string.Format(", \nPRIMARY KEY {0} ({1})", columnDefinition.IsIndexed ? "CLUSTERED" : "NONCLUSTERED", columns);
+            }
+
+            var statement = string.Format(CreateTable, GetQuotedTableName(table.Name), Format(table.Columns), primaryKey);
+
+            return statement;
+        }
+
         public override string Format(IndexDefinition index)
         {
             string name = string.IsNullOrEmpty(index.Name)
@@ -81,20 +121,25 @@ namespace Umbraco.Core.Persistence.SqlSyntax
                                  columns);
         }
 
-        public override bool DoesTableExist(Database db, string tableName)
+        public override string Format(ForeignKeyDefinition foreignKey)
         {
-            db.OpenSharedConnection();
-            var result =
-                db.ExecuteScalar<long>("SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES " +
-                "WHERE TABLE_NAME = @TableName AND " +
-                "TABLE_SCHEMA = @TableSchema", new { TableName = tableName, TableSchema = db.Connection.Database });
-
-            return result > 0;
+            return string.Format(CreateForeignKeyConstraint,
+                                 GetQuotedTableName(foreignKey.ForeignTable),
+                                 GetQuotedColumnName(foreignKey.ForeignColumns.First()),
+                                 GetQuotedTableName(foreignKey.PrimaryTable),
+                                 GetQuotedColumnName(foreignKey.PrimaryColumns.First()),
+                                 FormatCascade("DELETE", foreignKey.OnDelete),
+                                 FormatCascade("UPDATE", foreignKey.OnUpdate));
         }
 
-        public override bool SupportsClustered()
+        public override string FormatPrimaryKey(TableDefinition table)
         {
-            return false;
+            return string.Empty;
+        }
+
+        protected override string FormatConstraint(ColumnDefinition column)
+        {
+            return string.Empty;
         }
 
         protected override string FormatIdentity(ColumnDefinition column)
@@ -125,9 +170,6 @@ namespace Umbraco.Core.Persistence.SqlSyntax
 
         protected override string FormatPrimaryKey(ColumnDefinition column)
         {
-            if(column.IsPrimaryKey)
-                return "PRIMARY KEY";
-
             return string.Empty;
         }
 
@@ -158,12 +200,17 @@ namespace Umbraco.Core.Persistence.SqlSyntax
 
         public override string AlterColumn { get { return "ALTER TABLE {0} MODIFY COLUMN {1}"; } }
 
+        //CREATE TABLE {0} ({1}) ENGINE = INNODB versus CREATE TABLE {0} ({1}) ENGINE = MYISAM ?
+        public override string CreateTable { get { return "CREATE TABLE {0} ({1}{2})"; } }
+
+        public override string CreateIndex { get { return "CREATE INDEX {0} ON {1} ({2})"; } }
+
+        public override string CreateForeignKeyConstraint { get { return "ALTER TABLE {0} ADD FOREIGN KEY ({1}) REFERENCES {2} ({3}){4}{5}"; } }
+
         public override string DeleteConstraint { get { return "ALTER TABLE {0} DROP {1}{2}"; } }
 
         public override string DropIndex { get { return "DROP INDEX {0} ON {1}"; } }
 
-        public override string CreateTable { get { return "CREATE TABLE {0} ({1}) ENGINE = INNODB"; } }
-
-        public override string CreateIndex { get { return "CREATE INDEX {0} ON {1} ({2})"; } }
+        public override string RenameColumn { get { return "ALTER TABLE {0} CHANGE {1} {2}"; } }
     }
 }