using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace SqlSugar
{
    public class KdbndpDbMaintenance : DbMaintenanceProvider
    {
        #region DML
        protected override string GetDataBaseSql
        {
            get
            {
                if (IsPgModel()) 
                {
                    return "SELECT datname FROM pg_database";
                }
                return "SELECT datname FROM sys_database";
            }
        }
        protected override string GetColumnInfosByTableNameSql
        {
            get
            {
                string sql = $@"select cast (pclass.oid as int4) as TableId,cast(ptables.tablename as varchar) as TableName,
                                pcolumn.column_name as DbColumnName,pcolumn.udt_name as DataType,
                                pcolumn.character_maximum_length as Length,
                                pcolumn.column_default as DefaultValue,
                                col_description(pclass.oid, pcolumn.ordinal_position) as ColumnDescription,
                                case when pkey.colname = pcolumn.column_name
                                then true else false end as IsPrimaryKey,
                                case when UPPER(pcolumn.column_default) like 'NEXTVAL%'
                                then true else false end as IsIdentity,
                                case when UPPER(pcolumn.is_nullable) = 'YES'
                                then true else false end as IsNullable
                                 from (select * from sys_tables where  UPPER(tablename) = UPPER('{{0}}') and  lower(schemaname)='{GetSchema()}') ptables inner join sys_class pclass
                                on ptables.tablename = pclass.relname inner join (SELECT *
                                FROM information_schema.columns where UPPER(table_schema)=UPPER('{GetSchema()}')
                                ) pcolumn on pcolumn.table_name = ptables.tablename
                                left join (
	                                select  sys_class.relname,sys_attribute.attname as colname from 
	                                sys_constraint  inner join sys_class 
	                                on sys_constraint.conrelid = sys_class.oid 
	                                inner join sys_attribute on sys_attribute.attrelid = sys_class.oid 
	                                and  sys_attribute.attnum = sys_constraint.conkey[1]
	                                inner join sys_type on sys_type.oid = sys_attribute.atttypid
	                                where sys_constraint.contype='p'
                                ) pkey on pcolumn.table_name = pkey.relname
                                order by ptables.tablename";


                if (IsPgModel())
                {
                    sql = sql.Replace("sys_", "pg_");
                }
                else if (IsSqlServerModel())
                {

                    sql = sql.Replace("sys_", "pg_");
                    sql = sql.Replace("pg_constraint.conkey[1]", "pg_constraint.conkey{{1}}");
                    sql = sql.Replace("UPPER(", "pg_catalog.upper(");
                    sql = sql.Replace("lower(", "pg_catalog.lower(");
                    sql = sql.Replace("NEXTVAL%", "%nextval%");
                    sql = sql.Replace("pcolumn.udt_name", "pcolumn.data_type");
                    sql = sql.Replace("case when pkey.colname = pcolumn.column_name", "case when pkey.colname::text = pcolumn.column_name::text");
                    sql = sql.Replace("pcolumn on pcolumn.table_name = ptables.tablename", "pcolumn on pcolumn.table_name::text = ptables.tablename::text ");
                    sql = sql.Replace("pkey on pcolumn.table_name = pkey.relname", "pkey on pcolumn.table_name::text = pkey.relname::text ");
                }
                else if (IsMySql()) 
                { 
                    sql = sql.Replace("pcolumn.udt_name", "pcolumn.data_type");
                }
                return sql;
            }
        }
        protected override string GetTableInfoListSql
        {
            get
            {
                if (IsPgModel())
                {
                    return @"select cast(relname as varchar) as Name,
                        cast(obj_description(relfilenode,'pg_class') as varchar) as Description from pg_class c 
                        where  relkind = 'r' and  c.oid >= 16384 and c.relnamespace != 99 and c.relname not like '%pl_profiler_saved%' order by relname";
                }
                var result= @"select cast(relname as varchar) as Name,
                        cast(obj_description(relfilenode,'pg_class') as varchar) as Description from sys_class c 
                        where  relkind = 'r' and  c.oid >= 16384 and c.relnamespace != 99 and c.relname not like '%pl_profiler_saved%' order by relname";

                if (IsSqlServerModel()) 
                {
                    result = result.Replace(" as varchar)", " as varchar(max))");
                }
                return result;
            }
        }
        protected override string GetViewInfoListSql
        {
            get
            {
                return @"select  table_name as name  from information_schema.views where lower(table_schema)  ='" + GetSchema() + "' ";
            }
        }
        #endregion

        #region DDL
        protected override string CreateDataBaseSql
        {
            get
            {
                return "CREATE DATABASE {0}";
            }
        }
        protected override string AddPrimaryKeySql
        {
            get
            {
                return "ALTER TABLE {0} ADD PRIMARY KEY({2}) /*{1}*/";
            }
        }
        protected override string AddColumnToTableSql
        {
            get
            {
                if (IsSqlServerModel()) 
                {
                    return "ALTER TABLE {0} ADD  {1} {2}{3} {4} {5} {6}";
                }
                return "ALTER TABLE {0} ADD COLUMN {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 "mysqldump.exe  {0} -uroot -p > {1}  ";
            }
        }
        protected override string CreateTableSql
        {
            get
            {
                return "CREATE TABLE {0}(\r\n{1} $PrimaryKey)";
            }
        }
        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 "create table {0} as (select * from {1} limit {2} offset 0)";
            }
        }
        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 "ALTER TABLE {0} RENAME {1} TO {2}";
            }
        }
        protected override string AddColumnRemarkSql => "comment on column {1}.{0} is '{2}'";

        protected override string DeleteColumnRemarkSql => "comment on column {1}.{0} is ''";

        protected override string IsAnyColumnRemarkSql { get { throw new NotSupportedException(); } }

        protected override string AddTableRemarkSql => "comment on table {0} is '{1}'";

        protected override string DeleteTableRemarkSql => "comment on table {0} is ''";

        protected override string IsAnyTableRemarkSql { get { throw new NotSupportedException(); } }

        protected override string RenameTableSql => "alter table  {0} rename to {1}";

        protected override string CreateIndexSql
        {
            get
            {
                return "CREATE {3} INDEX Index_{0}_{2} ON {0} ({1})";
            }
        }
        protected override string AddDefaultValueSql
        {
            get
            {
                if (IsSqlServerModel()) 
                {
                    return "ALTER TABLE {0} ALTER {1} SET DEFAULT {2}";
                }
                return "ALTER TABLE {0} ALTER COLUMN {1} SET DEFAULT {2}";
            }
        }
        protected override string IsAnyIndexSql
        {
            get
            {
                var sql= "SELECT count(1) WHERE upper('{0}') IN ( SELECT upper(indexname) FROM sys_indexes ) ";
                if (IsPgModel())
                {
                    sql = sql.Replace("sys_", "pg_");
                }
                return sql;
            }
        }
        protected override string IsAnyProcedureSql => throw new NotImplementedException();
        #endregion

        #region Check
        protected override string CheckSystemTablePermissionsSql
        {
            get
            {
                return "select 1 from information_schema.columns limit 1 offset 0";
            }
        }
        #endregion

        #region Scattered
        protected override string CreateTableNull
        {
            get
            {
                return "DEFAULT NULL";
            }
        }
        protected override string CreateTableNotNull
        {
            get
            {
                return "NOT NULL";
            }
        }
        protected override string CreateTablePirmaryKey
        {
            get
            {
                return "PRIMARY KEY";
            }
        }
        protected override string CreateTableIdentity
        {
            get
            {
                return "serial";
            }
        }
        #endregion

        #region Methods
        public override List<string> GetDbTypes()
        {
            var result = this.Context.Ado.SqlQuery<string>(@"SELECT DISTINCT data_type
FROM information_schema.columns");
            result.Add("varchar");
            result.Add("timestamp");
            result.Add("uuid");
            result.Add("int2");
            result.Add("int4");
            result.Add("int8");
            result.Add("time");
            result.Add("date");
            result.Add("float8");
            result.Add("float4");
            result.Add("json");
            result.Add("jsonp");
            return result.Distinct().ToList();
        }
        public override List<string> GetTriggerNames(string tableName)
        {
            return this.Context.Ado.SqlQuery<string>(@"SELECT tgname
FROM pg_trigger
WHERE tgrelid = '" + tableName + "'::regclass");
        }
        public override List<string> GetFuncList()
        {
            return this.Context.Ado.SqlQuery<string>(" SELECT routine_name\r\nFROM information_schema.routines\r\nWHERE lower( routine_schema ) = '" + GetSchema().ToLower() + "' AND routine_type = 'FUNCTION' ");
        }
        public override bool AddDefaultValue(string tableName, string columnName, string defaultValue)
        {
            if (defaultValue?.StartsWith("'") == true && defaultValue?.EndsWith("'") == true && defaultValue?.Contains("(") == false
                && !defaultValue.EqualCase("'current_timestamp'") && !defaultValue.EqualCase("'current_date'"))
            {
                string sql = string.Format(AddDefaultValueSql, this.SqlBuilder.GetTranslationColumnName(tableName), this.SqlBuilder.GetTranslationColumnName(columnName), defaultValue);
                return this.Context.Ado.ExecuteCommand(sql) > 0;
            }
            else if (defaultValue.EqualCase("current_timestamp") || defaultValue.EqualCase("current_date"))
            {
                string sql = string.Format(AddDefaultValueSql, this.SqlBuilder.GetTranslationColumnName(tableName), this.SqlBuilder.GetTranslationColumnName(columnName), defaultValue);
                return this.Context.Ado.ExecuteCommand(sql) > 0;
            }
            else if (defaultValue?.Contains("(") == false
         && !defaultValue.EqualCase("'current_timestamp'") && !defaultValue.EqualCase("'current_date'"))
            {
                string sql = string.Format(AddDefaultValueSql, this.SqlBuilder.GetTranslationColumnName(tableName), this.SqlBuilder.GetTranslationColumnName(columnName), "'" + defaultValue + "'");
                return this.Context.Ado.ExecuteCommand(sql) > 0;
            }
            else
            {
                return base.AddDefaultValue(this.SqlBuilder.GetTranslationTableName(tableName), this.SqlBuilder.GetTranslationTableName(columnName), defaultValue);
            }
        }
        public override List<string> GetIndexList(string tableName)
        {
            var sql = $"SELECT indexname FROM sys_indexes WHERE UPPER(tablename) = UPPER('{tableName}') AND UPPER(schemaname) = UPPER('" + GetSchema() + "') ";
            if (IsPgModel())
            {
                sql = sql.Replace("sys_", "pg_");
            }
            return this.Context.Ado.SqlQuery<string>(sql);
        }
        public override List<string> GetProcList(string dbName)
        {
            var sql = $"SELECT proname FROM sys_proc p JOIN pg_namespace n ON p.pronamespace = n.oid WHERE UPPER(n.nspname) = UPPER('{dbName}')";
            if (IsPgModel())
            {
                sql = sql.Replace("sys_", "pg_");
            }
            return this.Context.Ado.SqlQuery<string>(sql);
        }
        private string GetSchema()
        {
            var schema = "public";
            if (IsSqlServerModel()) 
            {
                schema = "dbo";
            }
            if (System.Text.RegularExpressions.Regex.IsMatch(this.Context.CurrentConnectionConfig.ConnectionString.ToLower(), "searchpath="))
            {
                var regValue = System.Text.RegularExpressions.Regex.Match(this.Context.CurrentConnectionConfig.ConnectionString.ToLower(), @"searchpath\=(\w+)").Groups[1].Value;
                if (regValue.HasValue())
                {
                    schema = regValue;
                }
            }
            else if (System.Text.RegularExpressions.Regex.IsMatch(this.Context.CurrentConnectionConfig.ConnectionString.ToLower(), "search path="))
            {
                var regValue = System.Text.RegularExpressions.Regex.Match(this.Context.CurrentConnectionConfig.ConnectionString.ToLower(), @"search path\=(\w+)").Groups[1].Value;
                if (regValue.HasValue())
                {
                    schema = regValue;
                }
            }

            return schema.ToLower();
        }
        public override bool UpdateColumn(string tableName, DbColumnInfo columnInfo)
        {
            if (IsSqlServerModel())
            {
                if (columnInfo.DataType.EqualCase("uuid"))
                {
                    columnInfo.DataType = "uniqueidentifier";
                    columnInfo.Length = 0;
                    columnInfo.Scale = 0;
                }
            }

            ConvertCreateColumnInfo(columnInfo);
            tableName = this.SqlBuilder.GetTranslationTableName(tableName);
            var columnName = this.SqlBuilder.GetTranslationColumnName(columnInfo.DbColumnName);
            string type = GetType(tableName, columnInfo);
            //this.Context.Ado.ExecuteCommand(sql);

            string sql = @"ALTER TABLE {table} ALTER  {column} TYPE {type};ALTER TABLE {table} ALTER COLUMN {column} {null}";

            var isnull = columnInfo.IsNullable ? " DROP NOT NULL " : " SET NOT NULL ";

            sql = sql.Replace("{table}", tableName)
                .Replace("{type}", type)
                .Replace("{column}", columnName)
                .Replace("{null}", isnull);
            this.Context.Ado.ExecuteCommand(sql);
            return true;
        }
        protected string GetType(string tableName, DbColumnInfo columnInfo)
        {
            string columnName = this.SqlBuilder.GetTranslationColumnName(columnInfo.DbColumnName);
            tableName = this.SqlBuilder.GetTranslationTableName(tableName);
            string dataSize = GetSize(columnInfo);
            string dataType = columnInfo.DataType;
            //if (!string.IsNullOrEmpty(dataType))
            //{
            //    dataType =  dataType;
            //}
            return dataType + "" + dataSize;
        }
        //public override bool IsAnyColumn(string tableName, string columnName, bool isCache = true)
        //{
        //    var sql =
        //        $"select count(*) from information_schema.columns WHERE table_schema = '{GetSchema()}'  and UPPER(table_name) = '{tableName.ToUpper(IsUpper)}' and UPPER(column_name) = '{columnName.ToUpper(IsUpper)}'";
        //    return this.Context.Ado.GetInt(sql) > 0;
        //}

        public override bool IsAnyTable(string tableName, bool isCache = true)
        {
            var sql = $"select count(*) from information_schema.tables where UPPER(table_schema)=UPPER('{GetSchema()}') and UPPER(table_type)=UPPER('BASE TABLE') and UPPER(table_name)=UPPER('{tableName.ToUpper(IsUpper)}')";
            if (IsSqlServerModel()) 
            {
                sql = $"select count(*) from information_schema.tables where  UPPER(table_schema)=UPPER('{GetSchema()}') and  pg_catalog.UPPER(table_name)=pg_catalog.UPPER('{tableName.ToUpper(IsUpper)}')";
            }
            return this.Context.Ado.GetInt(sql)>0;
        }

        /// <summary>
        ///by current connection string
        /// </summary>
        /// <param name="databaseDirectory"></param>
        /// <returns></returns>
        public override bool CreateDatabase(string databaseName, string databaseDirectory = null)
        {
            if (this.Context.Ado.IsValidConnection())
            {
                return true;
            }
            if (databaseDirectory != null)
            {
                if (!FileHelper.IsExistDirectory(databaseDirectory))
                {
                    FileHelper.CreateDirectory(databaseDirectory);
                }
            }
            var oldDatabaseName = this.Context.Ado.Connection.Database;
            var connection = this.Context.CurrentConnectionConfig.ConnectionString;
            if (IsSqlServerModel())
            {
                connection = connection.Replace(oldDatabaseName, "master");
            }
            else
            {
                connection = connection.Replace(oldDatabaseName, "test");
            }
            var newDb = new SqlSugarClient(new ConnectionConfig()
            {
                DbType = this.Context.CurrentConnectionConfig.DbType,
                IsAutoCloseConnection = true,
                ConnectionString = connection
            });
            if (newDb.Ado.IsValidConnection() == false)
            {
                newDb = new SqlSugarClient(new ConnectionConfig()
                {
                    DbType = this.Context.CurrentConnectionConfig.DbType,
                    IsAutoCloseConnection = true,
                    ConnectionString = this.Context.CurrentConnectionConfig.ConnectionString.Replace(oldDatabaseName, "TEST")
                });
            }
            if (!GetDataBaseList(newDb).Any(it => it.Equals(databaseName, StringComparison.CurrentCultureIgnoreCase)))
            {
                newDb.Ado.ExecuteCommand(string.Format(CreateDataBaseSql, this.SqlBuilder.SqlTranslationLeft+databaseName+this.SqlBuilder.SqlTranslationRight, databaseDirectory));
            }
            return true;
        }
        public override bool AddRemark(EntityInfo entity)
        {
            var db = this.Context;
            var columns = entity.Columns.Where(it => it.IsIgnore == false).ToList();

            foreach (var item in columns)
            {
                if (item.ColumnDescription != null)
                {
                    db.DbMaintenance.AddColumnRemark(SqlBuilder.GetTranslationColumnName(item.DbColumnName).ToUpper(IsUpper), SqlBuilder.GetTranslationColumnName(item.DbTableName).ToUpper(IsUpper), item.ColumnDescription);

                }
            }
            //table remak
            if (entity.TableDescription != null)
            {
                db.DbMaintenance.AddTableRemark(SqlBuilder.GetTranslationColumnName(entity.DbTableName), entity.TableDescription);
            }
            return true;
        }
        public override bool AddColumn(string tableName, DbColumnInfo columnInfo)
        {
            if (IsSqlServerModel()) 
            {
                if (columnInfo.DataType.EqualCase("uuid")) 
                {
                    columnInfo.DataType = "uniqueidentifier";
                    columnInfo.Length = 0;
                    columnInfo.Scale = 0;
                }
            }
            return base.AddColumn(tableName, columnInfo);
        }
        public override bool RenameTable(string oldTableName, string newTableName)
        {
            return base.RenameTable(this.SqlBuilder.GetTranslationTableName(oldTableName), this.SqlBuilder.GetTranslationTableName(newTableName));
        }
        public override bool CreateTable(string tableName, List<DbColumnInfo> columns, bool isCreatePrimaryKey = true)
        {
            if (columns.HasValue())
            {
                foreach (var item in columns)
                {

                    ConvertCreateColumnInfo(item);
                    //if (item.DbColumnName.Equals("GUID", StringComparison.CurrentCultureIgnoreCase) && item.Length == 0)
                    //{
                    //    if (item.DataType?.ToLower() != "uuid")
                    //    {
                    //        item.Length = 10;
                    //    }
                    //}
                }
            }
            string sql = GetCreateTableSql(tableName, columns);
            string primaryKeyInfo = null;
            if (columns.Any(it => it.IsPrimarykey) && isCreatePrimaryKey)
            {
                primaryKeyInfo = string.Format(", Primary key({0})", string.Join(",", columns.Where(it => it.IsPrimarykey).Select(it => this.SqlBuilder.GetTranslationColumnName(it.DbColumnName.ToUpper(IsUpper)))));

            }
            sql = sql.Replace("$PrimaryKey", primaryKeyInfo);
            this.Context.Ado.ExecuteCommand(sql);
            return true;
        }
        protected override string GetCreateTableSql(string tableName, List<DbColumnInfo> columns)
        {
            List<string> columnArray = new List<string>();
            Check.Exception(columns.IsNullOrEmpty(), "No columns found ");
            foreach (var item in columns)
            {
                string columnName = item.DbColumnName;
                string dataType = item.DataType;
                if (dataType == "varchar" && item.Length == 0)
                {
                    item.Length = 1;
                }
                //if (dataType == "uuid")
                //{
                //    item.Length = 50;
                //    dataType = "varchar";
                //}
                string dataSize = item.Length > 0 ? string.Format("({0})", item.Length) : null;
                if (item.DecimalDigits > 0 && item.Length > 0 && dataType == "numeric")
                {
                    dataSize = $"({item.Length},{item.DecimalDigits})";
                }
                string nullType = item.IsNullable ? this.CreateTableNull : CreateTableNotNull;
                string primaryKey = null;
                string addItem = string.Format(this.CreateTableColumn, this.SqlBuilder.GetTranslationColumnName(columnName.ToUpper(IsUpper)), dataType, dataSize, nullType, primaryKey, "");
                if (item.IsIdentity)
                {
                    if (dataType?.ToLower() == "int")
                    {
                        dataSize = "int4";
                    }
                    else if (dataType?.ToLower() == "long")
                    {
                        dataSize = "int8";
                    }
                    string length = dataType.Substring(dataType.Length - 1);
                    string identityDataType = "serial" + length;
                    addItem = addItem.Replace(dataType, identityDataType);
                }
                columnArray.Add(addItem);
            }
            string tableString = string.Format(this.CreateTableSql, this.SqlBuilder.GetTranslationTableName(tableName.ToUpper(IsUpper)), string.Join(",\r\n", columnArray));
            return tableString;
        }
        protected override bool IsAnyDefaultValue(string tableName, string columnName, List<DbColumnInfo> columns)
        {
            var defaultValue = columns.Where(it => it.DbColumnName.Equals(columnName, StringComparison.CurrentCultureIgnoreCase)).First().DefaultValue;
            if (defaultValue?.StartsWith("NULL::") == true)
            {
                return false;
            }
            return defaultValue.HasValue();
        }
        public override bool IsAnyConstraint(string constraintName)
        {
            throw new NotSupportedException("PgSql IsAnyConstraint NotSupportedException");
        }
        public override bool BackupDataBase(string databaseName, string fullFileName)
        {
            Check.ThrowNotSupportedException("PgSql BackupDataBase NotSupported");
            return false;
        }

        public override List<DbColumnInfo> GetColumnInfosByTableName(string tableName, bool isCache = true)
        {
            var result = base.GetColumnInfosByTableName(tableName.TrimEnd('"').TrimStart('"').ToLower(), isCache);
            if (result == null || result.Count() == 0)
            {
                result = base.GetColumnInfosByTableName(tableName, isCache);
            }
            try
            {
                string sql = $@"select  
                               kcu.column_name as key_column
                               from information_schema.table_constraints tco
                               join information_schema.key_column_usage kcu 
                               on kcu.constraint_name = tco.constraint_name
                               and kcu.constraint_schema = tco.constraint_schema
                               and kcu.constraint_name = tco.constraint_name
                               where tco.constraint_type = 'PRIMARY KEY'
                               and kcu.table_schema='{GetSchema()}' and 
                               upper(kcu.table_name)=upper('{tableName.TrimEnd('"').TrimStart('"')}')";
                List<string> pkList = new List<string>();
                if (isCache)
                {
                    pkList = GetListOrCache<string>("GetColumnInfosByTableName_N_Pk" + tableName, sql);
                }
                else
                {
                    pkList = this.Context.Ado.SqlQuery<string>(sql);
                }
                if (pkList.Count > 1)
                {
                    foreach (var item in result)
                    {
                        if (pkList.Select(it => it.ToUpper()).Contains(item.DbColumnName.ToUpper()))
                        {
                            item.IsPrimarykey = true;
                        }
                    }
                }
            }
            catch
            {

            }
            return result;
        }
        public bool IsUpper
        {
            get
            {
                if (this.Context.CurrentConnectionConfig.MoreSettings == null)
                {
                    return true;
                }
                else
                {
                    return this.Context.CurrentConnectionConfig.MoreSettings.IsAutoToUpper == true;
                }
            }
        }
        private  void ConvertCreateColumnInfo(DbColumnInfo x)
        {
            string[] array = new string[] { "int4", "text", "int2", "int8", "date", "bit", "text", "timestamp" };

            if (array.Contains(x.DataType?.ToLower()))
            {
                x.Length = 0;
                x.DecimalDigits = 0;
            }

            if (IsSqlServerModel())
            {
                if (x.DataType.EqualCase("int8"))
                {
                    x.DataType = "bigint";
                    x.Length = 0;
                    x.Scale = 0;
                }
            }
        }
        private bool IsPgModel()
        {
            return this.Context.CurrentConnectionConfig?.MoreSettings?.DatabaseModel == DbType.PostgreSQL;
        }
        private bool IsSqlServerModel()
        {
            return this.Context.CurrentConnectionConfig?.MoreSettings?.DatabaseModel == DbType.SqlServer;
        }
        private bool IsMySql()
        {
            return this.Context.CurrentConnectionConfig?.MoreSettings?.DatabaseModel == DbType.MySql;
        }
        #endregion
    }
}