Exemplo n.º 1
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        public void ShowTables_ShouldReturnTablesList()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableData());
            dbPrototype.Tables.Add(GenerateTableClients());

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SHOW TABLES;";
                var reader      = cmd.ExecuteReader();

                Assert.AreEqual(1, reader.FieldCount);
                Assert.AreEqual("TABLE", reader.GetName(0));

                var expectedTables = new[] { "data", "clients" };
                var tablesCount    = 0;
                while (reader.Read())
                {
                    Assert.AreEqual(expectedTables[tablesCount], reader.GetString(0).ToLowerInvariant());
                    tablesCount += 1;
                }

                Assert.AreEqual(2, tablesCount);
                reader.Close();
            });
        }
Exemplo n.º 2
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        public void BulInsert_ShouldSuccessed()
        {
            var conn = new SharpHsqlConnection("Initial Catalog=mytest;User Id=sa;Pwd=;");

            try {
                conn.Open();
                var commandText = "DROP TABLE IF EXIST \"clients\";CREATE TABLE \"clients\" (\"id\" int NOT NULL IDENTITY PRIMARY KEY, \"DoubleValue\" double, \"nombre\" char, \"photo\" varbinary, \"created\" date );";
                var cmd         = new SharpHsqlCommand(commandText, conn);
                cmd.ExecuteNonQuery();

                var tran = conn.BeginTransaction();
                {
                    var data        = new Byte[] { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 };
                    var base64Photo = Convert.ToBase64String(data, 0, data.Length);

                    var insertCommand = new SharpHsqlCommand("", conn);
                    for (var i = 0; i < 1000; i++)
                    {
                        insertCommand.CommandText = "INSERT INTO \"clients\" (\"DoubleValue\", \"nombre\", \"photo\", \"created\") VALUES (1.1, 'NOMBRE" + i.ToString() + "', '" + base64Photo + "', NOW() );";
                        insertCommand.ExecuteNonQuery();
                    }
                }
                tran.Commit();

                Assert.Pass();
            }
            catch (SharpHsqlException ex) {
                Assert.Fail(ex.Message);
            }
            finally {
                conn.Close();
            }
        }
Exemplo n.º 3
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        public void UsingVariableInQuery()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableBooks());

            TestQuery(dbPrototype, connection => {
                PrepareVariables(connection);
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SELECT name, author, SUM(value) FROM books WHERE author = @MyVar GROUP BY name, author;";
                var reader      = cmd.ExecuteReader();

                reader.Read();
                Assert.AreEqual("Book001", reader.GetString(0));
                Assert.AreEqual("Andy", reader.GetString(1));
                Assert.AreEqual(43.9, reader.GetDecimal(2));

                reader.Read();
                Assert.AreEqual("Book002", reader.GetString(0));
                Assert.AreEqual("Andy", reader.GetString(1));
                Assert.AreEqual(37.25, reader.GetDecimal(2));

                Assert.False(reader.Read());
                reader.Close();
            });
        }
Exemplo n.º 4
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        public void GroupByClauseTest()
        {
            var dbPrototype = new DataSet("mytest");
            var booksTable  = GenerateTableBooks();

            dbPrototype.Tables.Add(booksTable);

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SELECT \"author\", SUM(\"value\") FROM \"books\" GROUP BY \"author\";";
                var reader      = cmd.ExecuteReader();

                reader.Read();
                Assert.AreEqual("Andy", reader.GetString(0));
                Assert.AreEqual(81.15, reader.GetDecimal(1));

                reader.Read();
                Assert.AreEqual("Any", reader.GetString(0));
                Assert.AreEqual(34.0, reader.GetDecimal(1));

                Assert.False(reader.Read());

                reader.Close();
            });
        }
Exemplo n.º 5
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        /// <summary>
        /// Creates temporary tables on the connection so schema information can be queried
        /// </summary>
        /// <remarks>
        /// There's a lot of work involved in getting schema information out of SharpHsql, but LINQ expects to
        /// be able to query on schema tables.  Therefore we need to "fake" it by generating temporary tables
        /// filled with the schema of the current connection.  We get away with making this information static
        /// because schema information seems to always be queried on a new connection object, so the schema is
        /// always fresh.
        /// </remarks>
        /// <param name="cnn">The connection upon which to build the schema tables</param>
        void ISharpHsqlSchemaExtensions.BuildTempSchema(SharpHsqlConnection cnn)
        {
            string[] arr = new string[] { "TABLES", "COLUMNS", "VIEWS", "VIEWCOLUMNS", "INDEXES", "INDEXCOLUMNS", "FOREIGNKEYS", "CATALOGS" };

            using (DataTable table = cnn.GetSchema("Tables", new string[] { "temp", null, String.Format("SCHEMA{0}", arr[0]) }))
            {
                if (table.Rows.Count > 0)
                {
                    return;
                }
            }

            for (int n = 0; n < arr.Length; n++)
            {
                using (DataTable table = cnn.GetSchema(arr[n]))
                {
                    DataTableToTable(cnn, table, String.Format("SCHEMA{0}", arr[n]));
                }
            }

            using (SharpHsqlCommand cmd = cnn.CreateCommand())
            {
                cmd.CommandText = Properties.Resources.SQL_CONSTRAINTS;
                cmd.ExecuteNonQuery();

                cmd.CommandText = Properties.Resources.SQL_CONSTRAINTCOLUMNS;
                cmd.ExecuteNonQuery();
            }
        }
Exemplo n.º 6
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        private void PrepareVariables(SharpHsqlConnection connection)
        {
            var cmd = new SharpHsqlCommand("", connection);

            cmd.CommandText = "DECLARE @MyVar CHAR;SET @MyVar = 'Andy';";
            cmd.ExecuteNonQuery();
        }
Exemplo n.º 7
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        public void ParameterizedQuery_ShouldSuccessful()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableClients());

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                var dt          = DateTime.Now;
                var photo       = new Byte[] { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 };
                cmd.CommandText = "INSERT INTO clients (id, DoubleValue, nombre, photo, created) VALUES (11, @DoubleValue, @nombre, @photo, @date); Set @Id = 11;";
                cmd.Parameters.Add(new SharpHsqlParameter("@Id", DbType.Int32, 0, ParameterDirection.Output, false, 0, 0, null, DataRowVersion.Current, null));
                cmd.Parameters.Add(new SharpHsqlParameter("@DoubleValue", DbType.Double, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, 1.1));
                cmd.Parameters.Add(new SharpHsqlParameter("@nombre", DbType.String, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, "Andrйs"));
                cmd.Parameters.Add(new SharpHsqlParameter("@photo", DbType.Binary, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, photo));
                cmd.Parameters.Add(new SharpHsqlParameter("@date", DbType.DateTime, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, dt));
                cmd.ExecuteNonQuery();

                var p    = (SharpHsqlParameter)cmd.Parameters["@Id"];
                var myid = (Int32)p.Value;
                Assert.AreEqual(11, myid);

                cmd.Parameters.Clear();
                cmd.CommandText = "SELECT created FROM clients WHERE id = " + myid + ";";

                var reader = cmd.ExecuteReader();
                reader.Read();
                Assert.AreEqual(dt, reader.GetDateTime(0));
                reader.Close();
            });
        }
Exemplo n.º 8
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        public void DeclareVariableTest()
        {
            var dbPrototype = new DataSet("mytest");

            TestQuery(dbPrototype, connection => {
                PrepareVariables(connection);
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SELECT @MyVar;";
                var myVar       = (String)cmd.ExecuteScalar();

                Assert.AreEqual("Andy", myVar);
            });
        }
Exemplo n.º 9
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        public void FunctionSqrt_ShouldReturnSquareRoot()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var cmd  = new SharpHsqlCommand("CALL SQRT(4);", connection);
                var sqrt = (Double)cmd.ExecuteScalar();
                Assert.AreEqual(2, sqrt);
            });
        }
Exemplo n.º 10
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        public void FunctionAscii_ShouldReturnCharCode()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var cmd   = new SharpHsqlCommand("CALL ASCII('A');", connection);
                var ascii = (Int32)cmd.ExecuteScalar();
                Assert.AreEqual(65, ascii);
            });
        }
Exemplo n.º 11
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        public void FunctionUser_ShouldReturnUserName()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var cmd  = new SharpHsqlCommand("CALL USER();", connection);
                var user = (String)cmd.ExecuteScalar();
                Assert.AreEqual("SA", user); // TODO: Why upper register?
            });
        }
Exemplo n.º 12
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        public void FunctionSubstring_ShouldReturnSubstring()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var cmd  = new SharpHsqlCommand("CALL SUBSTRING('0123456', 3, 2);", connection);
                var subs = (String)cmd.ExecuteScalar();
                Assert.AreEqual("23", subs);
            });
        }
Exemplo n.º 13
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        public void FunctionAbs_ShouldReturnAbsoluteValue()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var cmd    = new SharpHsqlCommand("CALL ABS(-33.5);", connection);
                var result = cmd.ExecuteScalar();
                Assert.NotNull(result);
                Assert.AreEqual(33.5, (Double)result);
            });
        }
Exemplo n.º 14
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        public void Delete_ShouldDeleteRecord()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "DELETE FROM clients WHERE id = 6;";
                var res         = cmd.ExecuteNonQuery();
                Assert.AreEqual(1, res);
            });
        }
        /// <summary>
        /// Simplify the creation of a SharpHsql command object by allowing
        /// a CommandType and Command Text to be provided
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  SharpHsqlCommand command = CreateCommand(conn, CommandType.Text, "Select * from Customers");
        /// </remarks>
        /// <param name="connection">A valid SharpHsqlConnection object</param>
        /// <param name="commandType">CommandType (TableDirect, Text)</param>
        /// <param name="commandText">CommandText</param>
        /// <returns>A valid SharpHsqlCommand object</returns>
        public static SharpHsqlCommand CreateCommand(SharpHsqlConnection connection, CommandType commandType, string commandText )
        {
            if( connection == null ) throw new ArgumentNullException( "connection" );

            if( commandType == CommandType.StoredProcedure ) throw new ArgumentException("Stored Procedures are not supported.");

            // If we receive parameter values, we need to figure out where they go
            if ((commandText == null) && (commandText.Length<= 0)) throw new ArgumentNullException( "Command Text" );

            // Create a SharpHsqlCommand
            SharpHsqlCommand cmd = new SharpHsqlCommand(commandText, connection );
            cmd.CommandType = CommandType.Text ;

            return cmd;
        }
Exemplo n.º 16
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        public void ShowDatabases_ShouldReturnCurrentDatabaseName()
        {
            var dbPrototype = new DataSet("mytest");

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SHOW DATABASES;";
                var reader      = cmd.ExecuteReader();
                Assert.AreEqual(1, reader.FieldCount);
                Assert.AreEqual("DATABASE", reader.GetName(0));
                reader.Read();
                Assert.AreEqual("MYTEST", reader.GetString(0));
                reader.Close();
            });
        }
Exemplo n.º 17
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        public void ShowDatabases_ShouldCorrectFillDataAdapter()
        {
            var dbPrototype = new DataSet("mytest");

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SHOW DATABASES;";
                var adapter     = new SharpHsqlDataAdapter(cmd);
                var ds          = new DataSet();
                var res         = adapter.Fill(ds);

                Assert.AreEqual(1, res);
                Assert.AreEqual(1, ds.Tables[0].Rows.Count);
            });
        }
Exemplo n.º 18
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        public void FunctionMax_ShouldReturnMaximalValue()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var commandText = "SELECT MAX(clients.id) FROM clients;";
                var command     = new SharpHsqlCommand(commandText, connection);
                var result      = command.ExecuteScalar();
                Assert.NotNull(result);
                Assert.AreEqual(Enumerable.Range(1, 10).Max(), (Int32)result);
            });
        }
Exemplo n.º 19
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        public void FunctionAvg_ShouldReturnAverageValue()
        {
            var dbPrototype  = new DataSet("mytest");
            var clientsTable = GenerateTableClients();

            dbPrototype.Tables.Add(clientsTable);

            TestQuery(dbPrototype, connection => {
                var commandText = "SELECT AVG(id) FROM clients;";
                var cmd         = new SharpHsqlCommand(commandText, connection);
                var result      = (Double)cmd.ExecuteScalar();
                Assert.NotNull(result);
                Assert.AreEqual(Enumerable.Range(1, 10).Average(), result);
            });
        }
Exemplo n.º 20
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        public void AssignVaribleInQuery()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableClients());

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "DECLARE @MyId INTEGER;";
                cmd.ExecuteNonQuery();
                cmd.CommandText = "SET @MyId = SELECT MAX(id) + 1 FROM clients;";
                cmd.ExecuteNonQuery();
                cmd.CommandText = "SELECT @MyId;";
                var myid        = (Int32)cmd.ExecuteScalar();
                Assert.AreEqual(11, myid);
            });
        }
Exemplo n.º 21
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        public static void Create()
        {
            //TODO : create foreign key constraint on METHOD_CALL table between INDEX_IN_FLOW and PARENT_INDEX_IN_FLOW
            if (!existingDB)
            {
                SharpHSqlDaoHelper.Initialize("Initial Catalog=" + DB_NAME + ";User Id=" + USER_ID + ";Pwd=" + PWD + ";");
                Factory<IDaoHelper> factory = Factory<IDaoHelper>.Instance;
                factory.TypeToCreate = typeof(SharpHSqlDaoHelper);
                SharpHsqlConnection conn = (SharpHsqlConnection) SharpHSqlDaoHelper.Instance.Connection;

                if (SharpHSqlDaoHelper.Instance.Connection.State == ConnectionState.Closed)
                    SharpHSqlDaoHelper.Instance.OpenConnection();

                SharpHsqlCommand createMethodCallTable = new
                    SharpHsqlCommand("CREATE TABLE METHOD_CALL( FLOW_ID int NOT NULL,INDEX_IN_FLOW int NOT NULL," +
                                         "PARAMETERS varchar(255) NULL,BEGIN_TIME numeric(19, 0) NULL," +
                                         "END_TIME numeric(19, 0) NULL, FULL_CLASS_NAME varchar(120) NULL," +
                                         "METHOD_NAME varchar(50) NULL, THROWABLE_CLASS_NAME varchar(120) NULL," +
                                         "THROWABLE_MESSAGE varchar(255) NULL, RESULT varchar(255) NULL," +
                                         "GROUP_NAME varchar(145) NULL, PARENT_INDEX_IN_FLOW int NULL," +
                                         "SUB_METH_INDEX int NULL," +
                                         "CONSTRAINT pk PRIMARY KEY " +
                                         "(" +
                                         "FLOW_ID," +
                                         "INDEX_IN_FLOW" +
                                         ")"+
                                         ")",
                                     conn);

                createMethodCallTable.ExecuteNonQuery();

                SharpHsqlCommand createExecutionFlowTable = new
                    SharpHsqlCommand("CREATE TABLE EXECUTION_FLOW (ID int NOT NULL IDENTITY PRIMARY KEY," +
                                     "THREAD_NAME varchar(255) NULL,JVM varchar(255) NULL,BEGIN_TIME numeric(19, 0) NULL," +
                                     "END_TIME numeric(19, 0) NULL, BEGIN_TIME_AS_DATE datetime NULL," +
                                     "DURATION numeric(19, 0) NULL,FIRST_METHOD_CALL_INDEX_IN_FLOW int NULL,"+
                                     "CONSTRAINT fk FOREIGN KEY (ID,FIRST_METHOD_CALL_INDEX_IN_FLOW) REFERENCES "+
                                     "METHOD_CALL (FLOW_ID, INDEX_IN_FLOW))",
                                     conn);

                createExecutionFlowTable.ExecuteNonQuery();

                existingDB = true;
            }
        }
Exemplo n.º 22
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        public void WhereClauseTest()
        {
            var dbPrototype = new DataSet("mytest");
            var booksTable  = GenerateTableBooks();

            dbPrototype.Tables.Add(booksTable);

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SELECT COUNT(*) as CNT, SUM(\"value\") FROM \"books\" WHERE \"author\" = 'Andy'";
                var reader      = cmd.ExecuteReader();
                reader.Read();

                Assert.AreEqual(2, reader.GetInt32(0));
                Assert.AreEqual(81.15m, reader.GetDecimal(1));
                reader.Close();
            });
        }
Exemplo n.º 23
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        public void UsingVariableInInsertStatement()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableClients());

            TestQuery(dbPrototype, connection => {
                PrepareVariables(connection);

                var data        = new Byte[] { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 };
                var base64Photo = Convert.ToBase64String(data, 0, data.Length);

                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "INSERT INTO clients (id, DoubleValue, nombre, photo, created) VALUES (100, 1.1, @MyVar, '" + base64Photo + "', NOW() );";
                var res         = cmd.ExecuteNonQuery();
                Assert.AreEqual(1, res);
            });
        }
Exemplo n.º 24
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        public void ShowTables_ShouldCorrectFillDataAdapter()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableClients());
            dbPrototype.Tables.Add(GenerateTableData());

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SHOW TABLES;";
                var adapter     = new SharpHsqlDataAdapter(cmd);
                var ds          = new DataSet();
                var res         = adapter.Fill(ds);

                Assert.AreEqual(2, res);
                Assert.AreEqual(2, ds.Tables[0].Rows.Count);
            });
        }
Exemplo n.º 25
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        //------------------------------------- Private -------------------------------------------------------
        string createMainDb()
        {
            try {
                using (var _conn = new SharpHsqlConnection("Initial Catalog=.;User Id=sa;Pwd=;")) {
                    _conn.Open();

                    //-- drop the table if it already exist, and then create new:
                    var _cmd = new SharpHsqlCommand("", _conn);
                    _cmd.CommandText  = "DROP TABLE IF EXIST \"CardInventory\";";
                    _cmd.CommandText += "CREATE CACHED TABLE \"CardInventory\" (\"pan\" BIGINT NOT NULL PRIMARY KEY);";
                    _cmd.ExecuteNonQuery();
                }
            }
            catch (Exception _ex) {
                return(_ex.Message);
            }
            return("Main Db created");
        }
Exemplo n.º 26
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        public void ShowParametersExternalFunction()
        {
            var dbPrototype = new DataSet("mytest");
            var connection  = GenerateTestDatabase(dbPrototype);

            try {
                connection.Open();
                var cmd = new SharpHsqlCommand("", connection);
                cmd.CommandText = "CREATE ALIAS CALCRATE FOR \"SharpHSQL.IntegrationTests,SharpHSQL.IntegrationTests.ExternalFunctionsSample.calcrate\";";
                cmd.ExecuteNonQuery();

                cmd.CommandText = "SHOW PARAMETERS CALCRATE;";
                var reader = cmd.ExecuteReader();

                reader.Read();
                Assert.AreEqual("CALCRATE", reader.GetString(0));
                Assert.AreEqual("RETURN_VALUE", reader.GetString(1));
                Assert.AreEqual("DECIMAL", reader.GetString(2));
                Assert.AreEqual(0, reader.GetInt32(3));

                reader.Read();
                Assert.AreEqual("CALCRATE", reader.GetString(0));
                Assert.AreEqual("amount", reader.GetString(1));
                Assert.AreEqual("DECIMAL", reader.GetString(2));
                Assert.AreEqual(1, reader.GetInt32(3));

                reader.Read();
                Assert.AreEqual("CALCRATE", reader.GetString(0));
                Assert.AreEqual("percent", reader.GetString(1));
                Assert.AreEqual("DECIMAL", reader.GetString(2));
                Assert.AreEqual(2, reader.GetInt32(3));

                Assert.False(reader.Read());

                reader.Close();
            }
            catch (SharpHsqlException ex) {
                Assert.Fail(ex.Message);
            }
            finally {
                connection.Close();
            }
        }
Exemplo n.º 27
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        public void ShowAlias_ShouldReturnAliases()
        {
            var dbPrototype = new DataSet("mytest");

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SHOW ALIAS;";
                var reader      = cmd.ExecuteReader();

                var aliasesCount = 0;
                while (reader.Read())
                {
                    aliasesCount += 1;
                }

                reader.Close();
                Assert.AreEqual(66, aliasesCount); // TODO: Unreliable test
            });
        }
Exemplo n.º 28
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        public void DataAdapterFill_ShouldFillAllRows()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableClients());

            TestQuery(dbPrototype, connection => {
                var commandText = "SELECT id, DoubleValue, nombre FROM clients WHERE id = 5;";
                using (var cmd = new SharpHsqlCommand(commandText, connection))
                    using (var adapter = new SharpHsqlDataAdapter(cmd)) {
                        var ds  = new DataSet();
                        var res = adapter.Fill(ds);

                        // 3. Assertion checking
                        Assert.AreEqual(1, res);
                        Assert.AreEqual(1, ds.Tables[0].Rows.Count);
                        Assert.Pass();
                    }
            });
        }
Exemplo n.º 29
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        public void CallExternFunction()
        {
            var dbPrototype = new DataSet("mytest");
            var connection  = GenerateTestDatabase(dbPrototype);

            try {
                connection.Open();
                var cmd = new SharpHsqlCommand("", connection);
                cmd.CommandText = "CREATE ALIAS CALCRATE FOR \"SharpHSQL.IntegrationTests,SharpHSQL.IntegrationTests.ExternalFunctionsSample.calcrate\";";
                cmd.ExecuteNonQuery();
                cmd.CommandText = "CALL CALCRATE(100, 21);";
                var rate = (Decimal)cmd.ExecuteScalar();
                Assert.AreEqual(121, rate);
            }
            catch (SharpHsqlException ex) {
                Assert.Fail(ex.Message);
            }
            finally {
                connection.Close();
            }
        }
Exemplo n.º 30
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        public void SimpleSelect()
        {
            var dbPrototype = new DataSet("mytest");
            var booksTable  = GenerateTableBooks();

            dbPrototype.Tables.Add(booksTable);

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SELECT * FROM \"books\"";
                var reader      = cmd.ExecuteReader();

                var booksCount = 0;
                while (reader.Read())
                {
                    booksCount += 1;
                }

                Assert.AreEqual(4, booksCount);
            });
        }
Exemplo n.º 31
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        /// <summary>
        /// Turn a datatable into a table in the temporary database for the connection
        /// </summary>
        /// <param name="cnn">The connection to make the temporary table in</param>
        /// <param name="table">The table to write out</param>
        /// <param name="dest">The temporary table name to write to</param>
        private void DataTableToTable(SharpHsqlConnection cnn, DataTable table, string dest)
        {
            StringBuilder           sql     = new StringBuilder();
            SharpHsqlCommandBuilder builder = new SharpHsqlCommandBuilder();

            using (SharpHsqlCommand cmd = cnn.CreateCommand())
                using (DataTable source = new DataTable())
                {
                    sql.AppendFormat(CultureInfo.InvariantCulture, "CREATE TEMP TABLE {0} (", builder.QuoteIdentifier(dest));
                    string separator = String.Empty;
                    foreach (DataColumn dc in table.Columns)
                    {
                        DbType dbtypeName = SharpHsqlConvert.TypeToDbType(dc.DataType);
                        string typeName   = SharpHsqlConvert.DbTypeToTypeName(dbtypeName);

                        sql.AppendFormat(CultureInfo.InvariantCulture, "{2}{0} {1} COLLATE NOCASE", builder.QuoteIdentifier(dc.ColumnName), typeName, separator);
                        separator = ", ";
                    }
                    sql.Append(")");

                    cmd.CommandText = sql.ToString();
                    cmd.ExecuteNonQuery();

                    cmd.CommandText = String.Format("SELECT * FROM TEMP.{0} WHERE 1=2", builder.QuoteIdentifier(dest));
                    using (SharpHsqlDataAdapter adp = new SharpHsqlDataAdapter(cmd))
                    {
                        builder.DataAdapter = adp;

                        adp.Fill(source);

                        foreach (DataRow row in table.Rows)
                        {
                            object[] arr = row.ItemArray;

                            source.Rows.Add(arr);
                        }
                        adp.Update(source);
                    }
                }
        }
Exemplo n.º 32
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        public void ShowColumns_ShouldReturnColumnsList()
        {
            var dbPrototype = new DataSet("mytest");

            dbPrototype.Tables.Add(GenerateTableData());

            TestQuery(dbPrototype, connection => {
                var cmd         = new SharpHsqlCommand("", connection);
                cmd.CommandText = "SHOW COLUMNS data;";
                var reader      = cmd.ExecuteReader();

                Console.Write(Environment.NewLine);

                // column id
                reader.Read();
                Assert.AreEqual("data", reader.GetString(0).ToLowerInvariant());
                Assert.AreEqual("id", reader.GetString(1).ToLowerInvariant());
                Assert.AreEqual("INTEGER", reader.GetString(2));
                Assert.AreEqual(DbType.Int32, (DbType)reader.GetValue(3));
                Assert.AreEqual(0, reader.GetInt32(4));
                Assert.AreEqual(false, reader.GetBoolean(5));
                Assert.AreEqual(false, reader.GetBoolean(6));

                // column MyObject
                reader.Read();
                Assert.AreEqual("data", reader.GetString(0).ToLowerInvariant());
                Assert.AreEqual("myobject", reader.GetString(1).ToLowerInvariant());
                Assert.AreEqual("OBJECT", reader.GetString(2));
                Assert.AreEqual(DbType.Object, (DbType)reader.GetValue(3));
                Assert.AreEqual(1, reader.GetInt32(4));
                Assert.AreEqual(true, reader.GetBoolean(5));
                Assert.AreEqual(false, reader.GetBoolean(6));

                // No more columns
                Assert.IsFalse(reader.Read());
                reader.Close();
            });
        }
Exemplo n.º 33
0
 public IDbCommand CreateCommand()
 {
     IDbCommand cmd = new SharpHsqlCommand();
     cmd.Connection = this.Connection;
     return cmd;
 }
Exemplo n.º 34
0
        private void DoTest()
        {
            try
            {
                txtResult.Text = "Test started...";

                //System.Diagnostics.Debugger.Launch();

                SharpHsqlConnection conn = new SharpHsqlConnection("Initial Catalog=\\program files\\pocketSample\\mytest;User Id=sa;Pwd=;");
                conn.Open();

                SharpHsqlTransaction tran = conn.BeginTransaction();

                SharpHsqlCommand cmd = new SharpHsqlCommand("", conn);

                int res;

                if( MessageBox.Show( "Drop & create 'clients' table?", "Drop Table", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2 ) == DialogResult.Yes )
                {

                    txtResult.Text += "\r\nDropping clients table...";

                    cmd.CommandText = "DROP TABLE IF EXIST \"clients\";CREATE CACHED TABLE \"clients\" (\"id\" int NOT NULL IDENTITY PRIMARY KEY, \"DoubleValue\" double, \"nombre\" char);";
                    res = cmd.ExecuteNonQuery();

                    for(int i=0;i<10;i++)
                    {
                        cmd.CommandText = "INSERT INTO \"clients\" (\"DoubleValue\", \"nombre\") VALUES (1.1, 'NOMBRE" + i.ToString() + "');";
                        res = cmd.ExecuteNonQuery();
                        cmd.CommandText = "CALL IDENTITY();";
                        int id = (int)cmd.ExecuteScalar();
                        txtResult.Text += String.Format("\r\nInserted id={0}", id );
                    }
                }

                if( MessageBox.Show( "Bulk INSERT 'clients' table?", "Insert Table", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2 ) == DialogResult.Yes )
                {

                    txtResult.Text += "\r\nBulk Insert clients table...";

                    for(int i=0;i<1000;i++)
                    {
                        cmd.CommandText = "INSERT INTO \"clients\" (\"DoubleValue\", \"nombre\") VALUES (1.1, 'NOMBRE" + i.ToString() + "');";
                        res = cmd.ExecuteNonQuery();
                    }

                    txtResult.Text += "\r\nInserted 1000 rows.";
                }

                txtResult.Text += "\r\nSelecting rows...";

                cmd.CommandText = "SELECT \"clients\".\"id\", \"clients\".\"DoubleValue\", \"clients\".\"nombre\" FROM \"clients\"";
                IDataReader reader = cmd.ExecuteReader();

                string row = "";
                int count = 0;

                while( reader.Read() )
                {
                    count++;
                    row = String.Format("id={0}, doubleValue={1}, nombre={2}", reader.GetInt32(0), reader.GetDouble(1), reader.GetString(2) );
                }

                txtResult.Text += String.Format("\r\nSelected {0} rows.", count);
                txtResult.Text += String.Format("\r\nLast row: \r\n{0}", row);

                reader.Close();

                tran.Commit();
                //tran.Rollback();

                cmd.CommandText = "DELETE FROM \"clients\" WHERE \"clients\".\"id\" = 5;";
                res = cmd.ExecuteNonQuery();

                cmd.CommandText = "SELECT MAX(\"clients\".\"id\") FROM \"clients\";";
                res = (int)cmd.ExecuteScalar();
                txtResult.Text += "\r\nMAX=" + res;

                cmd.CommandText = "SELECT SUM(\"clients\".\"id\") FROM \"clients\";";
                res = (int)cmd.ExecuteScalar();
                txtResult.Text += "\r\nSUM=" + res;

                cmd.CommandText = "SELECT COUNT(\"clients\".\"id\") FROM \"clients\";";
                res = (int)cmd.ExecuteScalar();
                txtResult.Text += "\r\nCOUNT=" + res;

                cmd.CommandText = "SELECT AVG(\"clients\".\"id\") FROM \"clients\";";
                res = (int)cmd.ExecuteScalar();
                txtResult.Text += "\r\nAVG=" + res;

                cmd.CommandText = "CALL ABS(-33.5632);";
                Double abs = (Double)cmd.ExecuteScalar();
                txtResult.Text += "\r\nABS=" + abs;

                cmd.CommandText = "CREATE ALIAS CALCRATE FOR \"ExternalFunction,ExternalFunction.Simple.calcrate\";";
                res = cmd.ExecuteNonQuery();

                cmd.CommandText = "CREATE ALIAS EXTTAN FOR \"ExternalFunction,ExternalFunction.Simple.tan\";";
                res = cmd.ExecuteNonQuery();

                cmd.CommandText = "CALL CALCRATE(100, 21);";
                Decimal rate = (Decimal)cmd.ExecuteScalar();
                txtResult.Text += "\r\nCALCRATE=" + rate;

                cmd.CommandText = "CALL EXTTAN(23.456);";
                Double tan = (Double)cmd.ExecuteScalar();
                txtResult.Text += "\r\nEXTTAN=" + tan;

                cmd.CommandText = "CALL SQRT(3);";
                Double sqrt = (Double)cmd.ExecuteScalar();
                txtResult.Text += "\r\nSQRT=" + sqrt;

                cmd.CommandText = "CALL SUBSTRING('0123456', 3, 2);";
                string subs = (String)cmd.ExecuteScalar();
                txtResult.Text += "\r\nSUBSTRING=" + subs;

                cmd.CommandText = "CALL ASCII('A');";
                int ascii = (int)cmd.ExecuteScalar();
                txtResult.Text += "\r\nASCII=" + ascii;

                cmd.CommandText = "CALL USER();";
                string user = (string)cmd.ExecuteScalar();
                txtResult.Text += "\r\nUSER="******"SELECT \"clients\".\"id\", \"clients\".\"DoubleValue\", \"clients\".\"nombre\" FROM \"clients\" WHERE \"clients\".\"id\" = 5;";

                SharpHsqlDataAdapter adapter = new SharpHsqlDataAdapter(cmd);
                DataSet ds = new DataSet();
                res = adapter.Fill( ds );
                adapter = null;

                txtResult.Text += "\r\nDataSet.Fill: " + ds.Tables[0].Rows.Count;

                conn.Close();
                conn = null;
            }
            catch( SharpHsqlException  ex )
            {
                txtResult.Text += "\r\nERROR: " + ex.Message;
            }
            catch( Exception ex )
            {
                txtResult.Text += "\r\nERROR: " + ex.Message;
            }
        }
Exemplo n.º 35
0
        static void Main(string[] args)
        {
            SharpHsqlConnection conn = new SharpHsqlConnection("Initial Catalog=mytest;User Id=sa;Pwd=;");

            byte[] data = new byte[]{255,255,255,255,255,255,255,255,255,255};
            string base64photo = Convert.ToBase64String(data, 0, data.Length);

            try
            {
                conn.Open();

                SharpHsqlCommand cmd = new SharpHsqlCommand("", conn);

                int res;

                Console.Write("Create table (y/n)?");
                string create = Console.ReadLine();
                if( create.ToLower() == "y" )
                {
                    cmd.CommandText = "DROP TABLE IF EXIST \"data\";CREATE TABLE \"data\" (\"id\" int NOT NULL PRIMARY KEY, \"MyObject\" OBJECT);";
                    res = cmd.ExecuteNonQuery();

                    cmd.CommandText = "DROP TABLE IF EXIST \"clients\";CREATE TABLE \"clients\" (\"id\" int NOT NULL IDENTITY PRIMARY KEY, \"DoubleValue\" double, \"nombre\" char, \"photo\" varbinary, \"created\" date );";
                    res = cmd.ExecuteNonQuery();

                    SharpHsqlTransaction tran = conn.BeginTransaction();

                    cmd = new SharpHsqlCommand("", conn);

                    for(int i=0;i<10;i++)
                    {
                        cmd.CommandText = "INSERT INTO \"clients\" (\"DoubleValue\", \"nombre\", \"photo\", \"created\") VALUES (1.1, 'NOMBRE" + i.ToString() + "', '" + base64photo + "', NOW() );";
                        res = cmd.ExecuteNonQuery();
                        cmd.CommandText = "CALL IDENTITY();";
                        int id = (int)cmd.ExecuteScalar();
                        Console.WriteLine("Inserted id={0}", id );
                    }

                    cmd.CommandText = "DROP TABLE IF EXIST \"books\";CREATE TABLE \"books\" (\"id\" INT NOT NULL PRIMARY KEY, \"name\" char, \"author\" char, \"qty\" int, \"value\" numeric);";
                    res = cmd.ExecuteNonQuery();

                    cmd.CommandText = "INSERT INTO \"books\" VALUES (1, 'Book000', 'Any', 1, 23.5);";
                    res = cmd.ExecuteNonQuery();
                    cmd.CommandText = "INSERT INTO \"books\" VALUES (2, 'Book001', 'Andy', 2, 43.9);";
                    res = cmd.ExecuteNonQuery();
                    cmd.CommandText = "INSERT INTO \"books\" VALUES (3, 'Book002', 'Andy', 3, 37.25);";
                    res = cmd.ExecuteNonQuery();
                    tran.Commit();
                }

                Console.WriteLine();

                Console.Write("Do Bulk INSERTS (y/n)?");
                string bulk = Console.ReadLine();
                if( bulk.ToLower() == "y" )
                {
                    SharpHsqlTransaction tran = conn.BeginTransaction();

                    cmd = new SharpHsqlCommand("", conn);

                    for(int i=0;i<1000;i++)
                    {
                        cmd.CommandText = "INSERT INTO \"clients\" (\"DoubleValue\", \"nombre\", \"photo\", \"created\") VALUES (1.1, 'NOMBRE" + i.ToString() + "', '" + base64photo + "', NOW() );";
                        res = cmd.ExecuteNonQuery();
                    }

                    tran.Commit();

                    Console.WriteLine("Inserted 1000 new clients.");
                    Console.WriteLine();
                }

                cmd = new SharpHsqlCommand("", conn);

                cmd.CommandText = "SELECT \"clients\".\"id\", \"clients\".\"DoubleValue\", \"clients\".\"nombre\",  \"clients\".\"photo\", \"clients\".\"created\" FROM \"clients\" ORDER BY \"clients\".\"id\" ";
                IDataReader reader = cmd.ExecuteReader();

                byte[] photo = null;

                while( reader.Read() )
                {
                    long len = reader.GetBytes(3, 0, null, 0, 0);
                    photo = new byte[len];
                    reader.GetBytes(3, 0, photo, 0, (int)len);
                    Console.WriteLine("id={0}, doubleValue={1}, nombre={2}, photo={3}, created={4}", reader.GetInt32(0), reader.GetDouble(1), reader.GetString(2), photo.Length, reader.GetDateTime(4).ToString("yyyy.MM.dd hh:mm:ss.fffffff") );
                }

                reader.Close();

                Console.WriteLine();

                cmd.CommandText = "SELECT * FROM \"books\"";
                reader = cmd.ExecuteReader();

                while( reader.Read() )
                {
                    Console.WriteLine("id={0}book={1},\tauthor={2},\tqty={3},\tvalue={4}", reader.GetInt32(0), reader.GetString(1), reader.GetString(2), reader.GetInt32(3), reader.GetDecimal(4) );
                }

                Console.WriteLine();

                reader.Close();

                Console.WriteLine();

                cmd.CommandText = "SELECT * FROM \"books\" ORDER BY \"value\"";
                reader = cmd.ExecuteReader();

                while( reader.Read() )
                {
                    Console.WriteLine("id={0}book={1},\tauthor={2},\tqty={3},\tvalue={4}", reader.GetInt32(0), reader.GetString(1), reader.GetString(2), reader.GetInt32(3), reader.GetDecimal(4) );
                }

                Console.WriteLine();

                reader.Close();

                Console.WriteLine();

                cmd.CommandText = "SELECT COUNT(*) as CNT, SUM(\"value\") FROM \"books\" WHERE \"author\" = 'Andy'";
                reader = cmd.ExecuteReader();

                while( reader.Read() )
                {
                    Console.WriteLine("count={0},\tvalue={1}", reader.GetInt32(0), reader.GetDecimal(1) );
                }

                Console.WriteLine();

                reader.Close();

                cmd.CommandText = "SELECT \"name\", \"author\", SUM(\"value\") FROM \"books\" WHERE \"author\" = 'Andy' GROUP BY \"name\", \"author\";";
                reader = cmd.ExecuteReader();

                while( reader.Read() )
                {
                    Console.WriteLine("name={0},\tauthor={1},\tvalue={2}", reader.GetString(0), reader.GetString(1), reader.GetDecimal(2) );
                }

                Console.WriteLine();

                reader.Close();

                cmd.CommandText = "SELECT \"name\", SUM(\"value\") FROM \"books\" WHERE \"author\" = 'Andy' GROUP BY \"name\";";
                reader = cmd.ExecuteReader();

                while( reader.Read() )
                {
                    Console.WriteLine("name={0},\tvalue={1}", reader.GetString(0), reader.GetDecimal(1) );
                }

                Console.WriteLine();

                reader.Close();
                cmd.CommandText = "DELETE FROM \"clients\" WHERE \"clients\".\"id\" = 6;";
                res = cmd.ExecuteNonQuery();

                Console.WriteLine();

                cmd.CommandText = "SELECT MAX(\"clients\".\"id\") FROM \"clients\";";
                object result = cmd.ExecuteScalar();
                if( result != null )
                {
                    res = (int)result;
                    Console.WriteLine("MAX=" + res);
                }

                cmd.CommandText = "SELECT SUM(\"clients\".\"id\") FROM \"clients\";";
                result = cmd.ExecuteScalar();
                if( result != null )
                {
                    res = (int)result;
                    Console.WriteLine("SUM=" + res);
                }

                cmd.CommandText = "SELECT COUNT(\"clients\".\"id\") FROM \"clients\";";
                result = cmd.ExecuteScalar();
                if( result != null )
                {
                    res = (int)result;
                    Console.WriteLine("COUNT=" + res);
                }

                cmd.CommandText = "SELECT AVG(\"clients\".\"id\") FROM \"clients\";";
                result = cmd.ExecuteScalar();
                if( result != null )
                {
                    res = (int)result;
                    Console.WriteLine("AVG=" + res);
                }

                cmd.CommandText = "CALL ABS(-33.5632);";
                result = cmd.ExecuteScalar();
                if( result != null )
                {
                    Double abs = (Double)result;
                    Console.WriteLine("ABS=" + abs);
                }

                cmd.CommandText = "CREATE ALIAS CALCRATE FOR \"ExternalFunction,ExternalFunction.Simple.calcrate\";";
                res = cmd.ExecuteNonQuery();

                cmd.CommandText = "CREATE ALIAS EXTTAN FOR \"ExternalFunction,ExternalFunction.Simple.tan\";";
                res = cmd.ExecuteNonQuery();

                cmd.CommandText = "CALL CALCRATE(100, 21);";
                Decimal rate = (Decimal)cmd.ExecuteScalar();
                Console.WriteLine("CALCRATE=" + rate);

                cmd.CommandText = "CALL EXTTAN(23.456);";
                Double tan = (Double)cmd.ExecuteScalar();
                Console.WriteLine("EXTTAN=" + tan);

                cmd.CommandText = "CALL SQRT(3);";
                Double sqrt = (Double)cmd.ExecuteScalar();
                Console.WriteLine("SQRT=" + sqrt);

                cmd.CommandText = "CALL SUBSTRING('0123456', 3, 2);";
                string subs = (String)cmd.ExecuteScalar();
                Console.WriteLine("SUBSTRING=" + subs);

                cmd.CommandText = "CALL ASCII('A');";
                int ascii = (int)cmd.ExecuteScalar();
                Console.WriteLine("ASCII=" + ascii);

                cmd.CommandText = "CALL USER();";
                string user = (string)cmd.ExecuteScalar();
                Console.WriteLine("USER="******"SELECT \"clients\".\"photo\" FROM \"clients\" WHERE \"clients\".\"id\" = 5;";
                byte[] b = (byte[])cmd.ExecuteScalar();

                cmd.CommandText = "SELECT \"clients\".\"id\", \"clients\".\"DoubleValue\", \"clients\".\"nombre\" FROM \"clients\" WHERE \"clients\".\"id\" = 5;";

                SharpHsqlDataAdapter adapter = new SharpHsqlDataAdapter(cmd);
                DataSet ds = new DataSet();
                res = adapter.Fill( ds );
                adapter = null;

                Console.WriteLine();
                Console.WriteLine("DataSet.Fill: " + ds.Tables[0].Rows.Count);

                cmd.CommandText = "DECLARE @MyVar CHAR;SET @MyVar = 'Andy';";
                cmd.ExecuteNonQuery();

                Console.WriteLine();
                cmd.CommandText = "SELECT @MyVar;";
                string var = (string)cmd.ExecuteScalar();
                Console.WriteLine("@MyVar=" + var);

                Console.WriteLine();

                cmd.CommandText = "SELECT \"name\", \"author\", SUM(\"value\") FROM \"books\" WHERE \"author\" = @MyVar GROUP BY \"name\", \"author\";";
                reader = cmd.ExecuteReader();

                while( reader.Read() )
                {
                    Console.WriteLine("name={0},\tauthor={1},\tvalue={2}", reader.GetString(0), reader.GetString(1), reader.GetDecimal(2) );
                }

                Console.WriteLine();
                reader.Close();

                cmd.CommandText = "INSERT INTO \"clients\" (\"DoubleValue\", \"nombre\", \"photo\", \"created\") VALUES (1.1, @MyVar, '" + base64photo + "', NOW() );";
                res = cmd.ExecuteNonQuery();
                cmd.CommandText = "DECLARE @MyId INT;SET @MyId = IDENTITY();";
                cmd.ExecuteNonQuery();
                cmd.CommandText = "SELECT @MyId;";
                int myid = (int)cmd.ExecuteScalar();
                Console.WriteLine("Inserted id={0}", myid );

                Console.WriteLine();

                cmd.CommandText = "SET @MyId = SELECT MAX(\"clients\".\"id\") + 1 FROM \"clients\";";
                cmd.ExecuteNonQuery();
                cmd.CommandText = "SELECT @MyId;";
                myid = (int)cmd.ExecuteScalar();
                Console.WriteLine("Next id={0}", myid );

                Console.WriteLine();
                reader.Close();

                DateTime dt = DateTime.Now;

                cmd.CommandText = "INSERT INTO \"clients\" (\"DoubleValue\", \"nombre\", \"photo\", \"created\") VALUES (@DoubleValue, @nombre, @photo, @date );SET @Id = IDENTITY();";
                cmd.Parameters.Add( new SharpHsqlParameter("@Id", DbType.Int32, 0, ParameterDirection.Output, false, 0, 0, null, DataRowVersion.Current, null) );
                cmd.Parameters.Add( new SharpHsqlParameter("@DoubleValue", DbType.Double, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, 1.1) );
                cmd.Parameters.Add( new SharpHsqlParameter("@nombre", DbType.String, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, "Andrés") );
                cmd.Parameters.Add( new SharpHsqlParameter("@photo", DbType.Binary, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, photo) );
                cmd.Parameters.Add( new SharpHsqlParameter("@date", DbType.DateTime, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, dt) );
                res = cmd.ExecuteNonQuery();
                SharpHsqlParameter p = (SharpHsqlParameter)cmd.Parameters["@Id"];
                myid = (int)p.Value;
                Console.WriteLine("Inserted id={0}", myid );
                Console.WriteLine();

                cmd.Parameters.Clear();
                cmd.CommandText = "SELECT \"clients\".\"created\" FROM \"clients\" WHERE \"clients\".\"id\" = " + myid + ";";
                reader = cmd.ExecuteReader();

                while( reader.Read() )
                {
                    Console.WriteLine( String.Format("Dates are equal: {0}.", dt.Equals( reader.GetDateTime(0) ) ) );
                }

                Console.WriteLine();
                reader.Close();

                cmd.CommandText = "SHOW DATABASES;";
                reader = cmd.ExecuteReader();

                for( int i=0;i<reader.FieldCount;i++)
                {
                    Console.Write( reader.GetName(i)  );
                    Console.Write( "\t"  );
                }
                Console.Write( Environment.NewLine  );

                while( reader.Read() )
                {
                    for( int i=0;i<reader.FieldCount;i++)
                    {
                        Console.Write( reader.GetValue(i).ToString()  );
                        Console.Write( "\t"  );
                        Console.Write( Environment.NewLine  );
                    }
                }

                Console.WriteLine();
                reader.Close();

                // Dataset Fill for SHOW DATABASES
                adapter = new SharpHsqlDataAdapter(cmd);
                ds = new DataSet();
                res = adapter.Fill( ds );
                adapter = null;

                Console.WriteLine();
                Console.WriteLine("DATABASES: " + ds.Tables[0].Rows.Count);

                Console.WriteLine();

                cmd.CommandText = "SHOW TABLES;";
                reader = cmd.ExecuteReader();

                for( int i=0;i<reader.FieldCount;i++)
                {
                    Console.Write( reader.GetName(i)  );
                    Console.Write( "\t"  );
                }
                Console.Write( Environment.NewLine  );

                while( reader.Read() )
                {
                    for( int i=0;i<reader.FieldCount;i++)
                    {
                        Console.Write( reader.GetValue(i).ToString()  );
                        Console.Write( "\t"  );
                        Console.Write( Environment.NewLine  );
                    }
                }

                Console.WriteLine();
                reader.Close();

                // Dataset Fill for SHOW TABLES
                adapter = new SharpHsqlDataAdapter(cmd);
                ds = new DataSet();
                res = adapter.Fill( ds );
                adapter = null;

                Console.WriteLine();
                Console.WriteLine("TABLES: " + ds.Tables[0].Rows.Count);

                Hashtable myData = new Hashtable();
                myData.Add( "1", "ONE" );
                myData.Add( "2", "TWO" );
                myData.Add( "3", "TREE" );
                myData.Add( "4", "FOUR" );
                myData.Add( "5", "FIVE" );

                cmd.Parameters.Clear();
                cmd.CommandText = "DELETE FROM \"data\" WHERE \"id\" = 1;";
                res = cmd.ExecuteNonQuery();

                cmd.Parameters.Clear();
                cmd.CommandText = "INSERT INTO \"data\" (\"id\", \"MyObject\") VALUES( @id, @MyObject);";
                cmd.Parameters.Add( new SharpHsqlParameter("@id", DbType.Int32, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, 1) );
                cmd.Parameters.Add( new SharpHsqlParameter("@MyObject", DbType.Object, 0, ParameterDirection.Input, false, 0, 0, null, DataRowVersion.Current, myData) );
                res = cmd.ExecuteNonQuery();
                cmd.Parameters.Clear();

                cmd.CommandText = "SELECT \"data\".\"id\", \"data\".\"MyObject\" FROM \"data\";";
                reader = cmd.ExecuteReader();
                Console.Write( Environment.NewLine  );

                int myId = 0;
                Hashtable readData = null;
                while( reader.Read() )
                {
                    myId = reader.GetInt32(0);
                    readData = (Hashtable)reader.GetValue(1);
                }

                foreach( DictionaryEntry entry in readData )
                {
                    Console.WriteLine( String.Format("Key: {0}, Value: {1}", entry.Key.ToString(), entry.Value.ToString() ) );
                }

                Console.WriteLine();
                reader.Close();

                cmd.CommandText = "SHOW ALIAS;";
                reader = cmd.ExecuteReader();

                Console.Write( Environment.NewLine  );

                while( reader.Read() )
                {
                    Console.WriteLine("ALIAS {0} FOR {1}", reader.GetString(0), reader.GetString(1)  );
                }

                Console.WriteLine();
                reader.Close();

                cmd.CommandText = "SHOW PARAMETERS CALCRATE;";
                reader = cmd.ExecuteReader();

                Console.Write( Environment.NewLine  );

                while( reader.Read() )
                {
                    Console.WriteLine("ALIAS: {0}, PARAM: {1},\t TYPE {2},\t POSITION: {3}", reader.GetString(0), reader.GetString(1), reader.GetString(2),  reader.GetInt32(3)  );
                }

                Console.WriteLine();
                reader.Close();

                cmd.CommandText = "SHOW COLUMNS \"clients\";";
                reader = cmd.ExecuteReader();

                Console.Write( Environment.NewLine  );

                while( reader.Read() )
                {
                    Console.WriteLine("TABLE: {0}, COLUMN: {1},\n\t NATIVE TYPE: {2},\t DB TYPE: {3},\n\t POSITION: {4},\t NULLABLE: {5},\t IDENTITY: {6}", reader.GetString(0), reader.GetString(1), reader.GetString(2), reader.GetValue(3),  reader.GetInt32(4), reader.GetBoolean(5), reader.GetBoolean(6) );
                }

                Console.WriteLine();
                reader.Close();
            }
            catch( SharpHsqlException  ex )
            {
                Console.WriteLine(ex.Message);
            }
            catch( Exception e )
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                conn.Close();
                conn = null;
            }

            Console.WriteLine();
            Console.WriteLine("Press [ENTER] to exit.");
            Console.ReadLine();
        }
Exemplo n.º 36
0
        private DbCommand CreateCommand(DbProviderManifest manifest, DbCommandTree commandTree)
        {
            if (manifest == null)
                throw new ArgumentNullException("manifest");

            if (commandTree == null)
                throw new ArgumentNullException("commandTree");

            SharpHsqlCommand command = new SharpHsqlCommand();
            try
            {
                List<DbParameter> parameters;
                CommandType commandType;

                command.CommandText = SqlGenerator.GenerateSql((SharpHsqlProviderManifest)manifest, commandTree, out parameters, out commandType);
                command.CommandType = commandType;

                // Get the function (if any) implemented by the command tree since this influences our interpretation of parameters
                EdmFunction function = null;
                if (commandTree is DbFunctionCommandTree)
                {
                    function = ((DbFunctionCommandTree)commandTree).EdmFunction;
                }

                // Now make sure we populate the command's parameters from the CQT's parameters:
                foreach (KeyValuePair<string, TypeUsage> queryParameter in commandTree.Parameters)
                {
                    SharpHsqlParameter parameter;

                    // Use the corresponding function parameter TypeUsage where available (currently, the SSDL facets and
                    // type trump user-defined facets and type in the EntityCommand).
                    FunctionParameter functionParameter;
                    if (null != function && function.Parameters.TryGetValue(queryParameter.Key, false, out functionParameter))
                    {
                        parameter = CreateSqlParameter(functionParameter.Name, functionParameter.TypeUsage, functionParameter.Mode, DBNull.Value);
                    }
                    else
                    {
                        parameter = CreateSqlParameter(queryParameter.Key, queryParameter.Value, ParameterMode.In, DBNull.Value);
                    }

                    command.Parameters.Add(parameter);
                }

                // Now add parameters added as part of SQL gen (note: this feature is only safe for DML SQL gen which
                // does not support user parameters, where there is no risk of name collision)
                if (null != parameters && 0 < parameters.Count)
                {
                    if (!(commandTree is DbInsertCommandTree) &&
                        !(commandTree is DbUpdateCommandTree) &&
                        !(commandTree is DbDeleteCommandTree))
                    {
                        throw new InvalidOperationException("SqlGenParametersNotPermitted");
                    }

                    foreach (DbParameter parameter in parameters)
                    {
                        command.Parameters.Add(parameter);
                    }
                }

                return command;
            }
            catch
            {
                command.Dispose();
                throw;
            }
        }
        /// <summary>
        /// Private helper method that execute a SharpHsqlCommand (that returns a resultset) against the specified SharpHsqlTransaction and SharpHsqlConnection
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(conn, trans, CommandType.Text, "Select * from TableTransaction where ProdId=?", ds, new string[] {"orders"}, new SharpHsqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid SharpHsqlConnection</param>
        /// <param name="transaction">A valid SharpHsqlTransaction</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        /// <param name="commandParameters">An array of SharpHsqlParamters used to execute the command</param>
        private static void FillDataset(SharpHsqlConnection connection, SharpHsqlTransaction transaction, CommandType commandType, 
			string commandText, DataSet dataSet, string[] tableNames,
			params SharpHsqlParameter[] commandParameters)
        {
            if( connection == null ) throw new ArgumentNullException( "connection" );
            if( dataSet == null ) throw new ArgumentNullException( "dataSet" );

            // Create a command and prepare it for execution
            SharpHsqlCommand command = new SharpHsqlCommand();
            bool mustCloseConnection = false;
            PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );

            // Create the DataAdapter & DataSet
            SharpHsqlDataAdapter dataAdapter = new SharpHsqlDataAdapter(command);

            try
            {
                // Add the table mappings specified by the user
                if (tableNames != null && tableNames.Length > 0)
                {
                    string tableName = "Table";
                    for (int index=0; index < tableNames.Length; index++)
                    {
                        if( tableNames[index] == null || tableNames[index].Length == 0 ) throw new ArgumentException( "The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames" );
                        dataAdapter.TableMappings.Add(tableName, tableNames[index]);
                        tableName += (index + 1).ToString();
                    }
                }

                // Fill the DataSet using default values for DataTable names, etc
                dataAdapter.Fill(dataSet);

                // Detach the SharpHsqlParameters from the command object, so they can be used again
                command.Parameters.Clear();

                if( mustCloseConnection )
                    connection.Close();
            }
            finally
            {
                dataAdapter.Dispose();
            }
        }
 /// <summary>
 /// This method is used to attach array of SharpHsqlParameters to a SharpHsqlCommand.
 /// 
 /// This method will assign a value of DbNull to any parameter with a direction of
 /// InputOutput and a value of null.  
 /// 
 /// This behavior will prevent default values from being used, but
 /// this will be the less common case than an intended pure output parameter (derived as InputOutput)
 /// where the user provided no input value.
 /// </summary>
 /// <param name="command">The command to which the parameters will be added</param>
 /// <param name="commandParameters">An array of SharpHsqlParameters to be added to command</param>
 private static void AttachParameters(SharpHsqlCommand command, SharpHsqlParameter[] commandParameters)
 {
     if( command == null ) throw new ArgumentNullException( "command" );
     if( commandParameters != null )
     {
         foreach (SharpHsqlParameter p in commandParameters)
         {
             if( p != null )
             {
                 // Check for derived output value with no value assigned
                 if ( ( p.Direction == ParameterDirection.InputOutput ||
                     p.Direction == ParameterDirection.Input ) &&
                     (p.Value == null))
                 {
                     p.Value = DBNull.Value;
                 }
                 command.Parameters.Add(p);
             }
         }
     }
 }
        /// <summary>
        /// This method opens (if necessary) and assigns a connection, transaction, command type and parameters 
        /// to the provided command
        /// </summary>
        /// <param name="command">The SharpHsqlCommand to be prepared</param>
        /// <param name="connection">A valid SharpHsqlConnection, on which to execute this command</param>
        /// <param name="transaction">A valid SharpHsqlTransaction, or 'null'</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command</param>
        /// <param name="commandParameters">An array of SharpHsqlParameters to be associated with the command or 'null' if no parameters are required</param>
        /// <param name="mustCloseConnection"><c>true</c> if the connection was opened by the method, otherwose is false.</param>
        private static void PrepareCommand(SharpHsqlCommand command, SharpHsqlConnection connection, SharpHsqlTransaction transaction, CommandType commandType, string commandText, SharpHsqlParameter[] commandParameters, out bool mustCloseConnection )
        {
            if( command == null ) throw new ArgumentNullException( "command" );

            if(commandType == CommandType.StoredProcedure ) throw new ArgumentException("Stored Procedures are not supported.");

            // If the provided connection is not open, we will open it
            if (connection.State != ConnectionState.Open)
            {
                mustCloseConnection = true;
                connection.Open();
            }
            else
            {
                mustCloseConnection = false;
            }

            // Associate the connection with the command
            command.Connection = connection;

            // Set the command text (SQL statement)
            command.CommandText = commandText;

            // If we were provided a transaction, assign it
            if (transaction != null)
            {
                if( transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
                command.Transaction = transaction;
            }

            // Set the command type
            command.CommandType = commandType;

            // Attach the command parameters if they are provided
            if (commandParameters != null)
            {
                AttachParameters(command, commandParameters);
            }
            return;
        }
        /// <summary>
        /// Execute a SharpHsqlCommand (that returns a resultset) against the specified SharpHsqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataSet ds = ExecuteDataset(trans, CommandType.Text, "Select * from TableTransaction where ProdId=?", new SharpHsqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid SharpHsqlTransaction</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command</param>
        /// <param name="commandParameters">An array of SharpHsqlParamters used to execute the command</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataset(SharpHsqlTransaction transaction, CommandType commandType, string commandText, params SharpHsqlParameter[] commandParameters)
        {
            if( transaction == null ) throw new ArgumentNullException( "transaction" );
            if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );

            // Create a command and prepare it for execution
            SharpHsqlCommand cmd = new SharpHsqlCommand();
            bool mustCloseConnection = false;
            PrepareCommand(cmd, (SharpHsqlConnection)transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Create the DataAdapter & DataSet
            //using( SharpHsqlDataAdapter da = new SharpHsqlDataAdapter(cmd) )

            SharpHsqlDataAdapter da = new SharpHsqlDataAdapter(cmd);

            DataSet ds = new DataSet();
            ds.Locale  =CultureInfo.InvariantCulture;

            // Fill the DataSet using default values for DataTable names, etc
            da.Fill(ds);

            // Detach the SharpHsqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();

            // Return the dataset
            return ds;
        }
        /// <summary>
        /// Execute a SharpHsqlCommand (that returns a 1x1 resultset) against the specified SharpHsqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(conn, CommandType.Text, "Select count(Order) from TableTransaction where ProdId=?", new SharpHsqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid SharpHsqlConnection</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command</param>
        /// <param name="commandParameters">An array of SharpHsqlParamters used to execute the command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(SharpHsqlConnection connection, CommandType commandType, string commandText, params SharpHsqlParameter[] commandParameters)
        {
            if( connection == null ) throw new ArgumentNullException( "connection" );

            // Create a command and prepare it for execution
            SharpHsqlCommand cmd = new SharpHsqlCommand();

            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (SharpHsqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );

            // Execute the command & return the results
            object retval = cmd.ExecuteScalar();

            // Detach the SharpHsqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();

            if( mustCloseConnection )
                connection.Close();

            return retval;
        }
        /// <summary>
        /// Execute a SharpHsqlCommand (that returns a 1x1 resultset) against the specified SharpHsqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(trans, CommandType.Text, "Select count(Order) from TableTransaction where ProdId=?", new SharpHsqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid SharpHsqlTransaction</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command</param>
        /// <param name="commandParameters">An array of SharpHsqlParamters used to execute the command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(SharpHsqlTransaction transaction, CommandType commandType, string commandText, params SharpHsqlParameter[] commandParameters)
        {
            if( transaction == null ) throw new ArgumentNullException( "transaction" );
            if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );

            // Create a command and prepare it for execution
            SharpHsqlCommand cmd = new SharpHsqlCommand();
            bool mustCloseConnection = false;
            PrepareCommand(cmd, (SharpHsqlConnection)transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Execute the command & return the results
            object retval = cmd.ExecuteScalar();

            // Detach the SharpHsqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();
            return retval;
        }
        /// <summary>
        /// Execute a SharpHsqlCommand (that returns a resultset) against the specified SharpHsqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  XmlReader r = ExecuteXmlReader(trans, CommandType.Text, "Select * from TableTransaction where ProdId=?", new SharpHsqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid SharpHsqlTransaction</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command using "FOR XML AUTO"</param>
        /// <param name="commandParameters">An array of SharpHsqlParamters used to execute the command</param>
        /// <returns>An XmlReader containing the resultset generated by the command</returns>
        public static string ExecuteXml(SharpHsqlTransaction transaction, CommandType commandType, string commandText, params SharpHsqlParameter[] commandParameters)
        {
            if( transaction == null ) throw new ArgumentNullException( "transaction" );
            if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );

            //			// Create a command and prepare it for execution
            SharpHsqlCommand cmd = new SharpHsqlCommand();
            bool mustCloseConnection = false;
            PrepareCommand(cmd, (SharpHsqlConnection)transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Create the DataAdapter & DataSet
            SharpHsqlDataAdapter obj_Adapter =new SharpHsqlDataAdapter (cmd);
            DataSet ds=new DataSet();
            ds.Locale  =CultureInfo.InvariantCulture;
            obj_Adapter.Fill(ds);

            // Detach the SharpHsqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();
            string retval= ds.GetXml();
            ds.Clear();
            obj_Adapter.Dispose ();
            return retval;
        }
        /// <summary>
        /// Executes the respective command for each inserted, updated, or deleted row in the DataSet.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
        /// </remarks>
        /// <param name="insertCommand">A valid transact-SQL statement to insert new records into the data source</param>
        /// <param name="deleteCommand">A valid transact-SQL statement to delete records from the data source</param>
        /// <param name="updateCommand">A valid transact-SQL statement used to update records in the data source</param>
        /// <param name="dataSet">The DataSet used to update the data source</param>
        /// <param name="tableName">The DataTable used to update the data source.</param>
        public static void UpdateDataset(SharpHsqlCommand insertCommand, SharpHsqlCommand deleteCommand, SharpHsqlCommand updateCommand, DataSet dataSet, string tableName)
        {
            if( insertCommand == null ) throw new ArgumentNullException( "insertCommand" );
            if( deleteCommand == null ) throw new ArgumentNullException( "deleteCommand" );
            if( updateCommand == null ) throw new ArgumentNullException( "updateCommand" );
            if( tableName == null || tableName.Length == 0 ) throw new ArgumentNullException( "tableName" );

            // Create a SharpHsqlDataAdapter, and dispose of it after we are done
            SharpHsqlDataAdapter dataAdapter = new SharpHsqlDataAdapter();
            try
            {
                // Set the data adapter commands
                dataAdapter.UpdateCommand = updateCommand;
                dataAdapter.InsertCommand = insertCommand;
                dataAdapter.DeleteCommand = deleteCommand;

                // Update the dataset changes in the data source
                dataAdapter.Update (dataSet,tableName);

                // Commit all the changes made to the DataSet
                dataSet.AcceptChanges();
            }
            catch (SharpHsqlException E)
            {string strError=E.Message;}
            finally{dataAdapter.Dispose();}
        }
        /// <summary>
        /// Execute a SharpHsqlCommand (that returns a resultset) against the specified SharpHsqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        /// string  r = ExecuteXml(conn, CommandType.Text, "Select * from TableTransaction where ProdId=?", new SharpHsqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid SharpHsqlConnection</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command using "FOR XML AUTO"</param>
        /// <param name="commandParameters">An array of SharpHsqlParamters used to execute the command</param>
        /// <returns>An string containing the resultset generated by the command</returns>
        public static string ExecuteXml(SharpHsqlConnection connection, CommandType commandType, string commandText, params SharpHsqlParameter[] commandParameters)
        {
            if( connection == null ) throw new ArgumentNullException( "connection" );

            bool mustCloseConnection = false;
            // Create a command and prepare it for execution
            SharpHsqlCommand cmd = new SharpHsqlCommand();
            try
            {
                PrepareCommand(cmd, connection, (SharpHsqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );

                // Create the DataAdapter & DataSet
                SharpHsqlDataAdapter obj_Adapter =new SharpHsqlDataAdapter (cmd);
                DataSet ds=new DataSet();
                ds.Locale  =CultureInfo.InvariantCulture;
                obj_Adapter.Fill(ds);

                // Detach the SharpHsqlParameters from the command object, so they can be used again
                cmd.Parameters.Clear();
                string retval= ds.GetXml();
                 ds.Clear();
                 obj_Adapter.Dispose ();
                return retval;

            }
            catch
            {
                if( mustCloseConnection )
                    connection.Close();
                throw;
            }
        }
        /// <summary>
        /// Create and prepare a SharpHsqlCommand, and call ExecuteReader with the appropriate CommandBehavior.
        /// </summary>
        /// <remarks>
        /// If we created and opened the connection, we want the connection to be closed when the DataReader is closed.
        /// 
        /// If the caller provided the connection, we want to leave it to them to manage.
        /// </remarks>
        /// <param name="connection">A valid SharpHsqlConnection, on which to execute this command</param>
        /// <param name="transaction">A valid SharpHsqlTransaction, or 'null'</param>
        /// <param name="commandType">The CommandType (TableDirect, Text)</param>
        /// <param name="commandText">The T-SQL command</param>
        /// <param name="commandParameters">An array of SharpHsqlParameters to be associated with the command or 'null' if no parameters are required</param>
        /// <param name="connectionOwnership">Indicates whether the connection parameter was provided by the caller, or created by SharpHsqlHelper</param>
        /// <returns>SharpHsqlReader containing the results of the command</returns>
        private static SharpHsqlReader ExecuteReader(SharpHsqlConnection connection, SharpHsqlTransaction transaction, CommandType commandType, string commandText, SharpHsqlParameter[] commandParameters, SharpHsqlConnectionOwnership connectionOwnership)
        {
            if( connection == null ) throw new ArgumentNullException( "connection" );

            bool mustCloseConnection = false;
            // Create a command and prepare it for execution
            SharpHsqlCommand cmd = new SharpHsqlCommand();
            try
            {
                PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );

                // Create a reader
                SharpHsqlReader dataReader;

                // Call ExecuteReader with the appropriate CommandBehavior
                if (connectionOwnership == SharpHsqlConnectionOwnership.External)
                {
                    dataReader = cmd.ExecuteReader();
                }
                else
                {
                    dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                }

                // Detach the SharpHsqlParameters from the command object, so they can be used again.
                // HACK: There is a problem here, the output parameter values are fletched
                // when the reader is closed, so if the parameters are detached from the command
                // then the SharpHsqlReader can´t set its values.
                // When this happen, the parameters can´t be used again in other command.
                bool canClear = true;
                foreach(SharpHsqlParameter commandParameter in cmd.Parameters)
                {
                    if (commandParameter.Direction != ParameterDirection.Input)
                        canClear = false;
                }

                if (canClear)
                {
                    cmd.Parameters.Clear();
                }

                return dataReader;
            }
            catch
            {
                if( mustCloseConnection )
                    connection.Close();
                throw;
            }
        }