/// <summary>
/// Executes the select query.
/// </summary>
/// <param name="connectionString">The connection string.</param>
/// <param name="query">The query.</param>
/// <returns>A data table containing the result of the query</returns>
public DataTable ExecuteSelectQuery(string connectionString, string query)
{
using (System.Data.H2.H2Connection connection = new System.Data.H2.H2Connection(connectionString, "sa", string.Empty))
{
this.logger.LogVerbose(string.Format("Execute query {0}", query));
connection.Open();
var com = new H2Command(query, connection);
var result = com.ExecuteReader();
var tableResult = new DataTable();
for (int i = 0; i < result.FieldCount; i++)
{
tableResult.Columns.Add(result.GetName(i), result.GetFieldType(i));
}
while (result.Read())
{
var row = tableResult.NewRow();
for (int i = 0; i < result.FieldCount; i++)
{
row[i] = result.GetValue(i);
}
tableResult.Rows.Add(row);
}
return(tableResult);
}
}
public static void Main(string[] args)
{
Console.WriteLine("Hello World!");
var connection = new H2Connection("jdbc:h2:mem:test");
connection.Open();
new H2Command("create table list (item integer primary key, description varchar(256), value integer)", connection).ExecuteNonQuery();
new H2Command("insert into list values (1, 'First Item', 10)", connection).ExecuteNonQuery();
new H2Command("insert into list values (2, 'Second Item', 11)", connection).ExecuteNonQuery();
var table = new DataTable("test")
{
CaseSensitive = false
};
var adapter = new H2DataAdapter("select item, description, value from list order by item", connection);
new H2CommandBuilder(adapter);
adapter.Fill(table);
table.Rows[1][1] = "First item modified";
table.Rows[1][2] = 12;
table.Rows.Add(new object[] { 3, "Third", 15 });
adapter.Update(table);
var table2 = new DataTable("test")
{
CaseSensitive = false
};
adapter.Fill(table2);
var x1 = table.ToXml();
var x2 = table2.ToXml();
Debug.Assert(x1.Equals(x2));
var count = new H2Command("select count(*) from list", connection).ExecuteScalar();
Debug.Assert(((long)count).Equals(3));
var one = new H2Command("select 1 from dual", connection).ExecuteScalar();
Debug.Assert(((int)one).Equals(1));
var a = new H2Command("select 'a' from dual", connection).ExecuteScalar();
Debug.Assert(((string)a).Equals("a"));
SimpleTest(connection, "int", 10, 11, 12);
SimpleTest(connection, "bigint", (long)10, (long)11, (long)12);
SimpleTest(connection, "smallint", (short)10, (short)11, (short)12);
SimpleTest(connection, "tinyint", (byte)10, (byte)11, (byte)12);
SimpleTest(connection, "double", 10d, 11d, 12d);
SimpleTest(connection, "float", 10d, 11d, 12d); // double is float !
SimpleTest(connection, "varchar(255)", "10", "11", "12");
SimpleTest(connection, "timestamp", DateTime.Today, DateTime.Today.AddDays(1), DateTime.Today.AddDays(2));
SimpleTest(connection, "date", DateTime.Today, DateTime.Today.AddDays(1), DateTime.Today.AddDays(2));
//var x1 = table.ToXml();
}
static void Main(string[] args)
{
using (var connection = new H2Connection("connectionString", "username", "password"))
{
connection.Open();
H2Command command = connection.CreateCommand();
command.CommandText = "SELECT * FROM ACCOUNT";
H2DataReader reader = command.ExecuteReader();
while (reader.Read())
{
Console.WriteLine($"USER_NAME: {reader["USER_NAME"]} MAIL_ADDRESS: {reader["MAIL_ADDRESS"]}");
}
}
}
public static void Main(string[] args)
{
Console.WriteLine("Hello World!");
var connection = new H2Connection("jdbc:h2:mem:test");
connection.Open();
new H2Command("create table list (item integer primary key, description varchar(256), value integer)", connection).ExecuteNonQuery();
new H2Command("insert into list values (1, 'First Item', 10)", connection).ExecuteNonQuery();
new H2Command("insert into list values (2, 'Second Item', 11)", connection).ExecuteNonQuery();
var table = new DataTable("test")
{
CaseSensitive = false
};
var adapter = new H2DataAdapter("select item, description, value from list order by item", connection);
new H2CommandBuilder(adapter);
adapter.Fill(table);
table.Rows[1][1] = "First item modified";
table.Rows[1][2] = 12;
table.Rows.Add(new object[] { 3, "Third", 15 });
adapter.Update(table);
var table2 = new DataTable("test")
{
CaseSensitive = false
};
adapter.Fill(table2);
var x1 = table.ToXml();
var x2 = table2.ToXml();
Debug.Assert(x1.Equals(x2));
H2DataReader reader = adapter.SelectCommand.ExecuteReader();
int readerCount = 0;
Debug.Assert(reader.GetOrdinal("item") == 0);
Debug.Assert(reader.GetOrdinal("Description") == 1);
Debug.Assert(reader.GetOrdinal("VALUE") == 2);
try
{
reader.GetOrdinal("throwException");
Debug.Fail("Exception not thrown for GetOrdinal");
}
catch (IndexOutOfRangeException)
{
}
while (reader.Read())
{
int item = reader.GetInt32(0);
string description = reader.GetString(1);
int value = reader.GetInt32(2);
readerCount++;
Debug.Assert(item == readerCount);
CheckVal(reader["ITEM"], readerCount);
switch (item)
{
case 1:
Debug.Assert(description == "First Item");
Debug.Assert(value == 10);
CheckVal(reader["description"], "First Item");
CheckVal(reader["Value"], 10);
break;
case 2:
Debug.Assert(description == "First item modified");
Debug.Assert(value == 12);
CheckVal(reader["description"], "First item modified");
CheckVal(reader["Value"], 12);
break;
case 3:
Debug.Assert(description == "Third");
Debug.Assert(value == 15);
CheckVal(reader["description"], "Third");
CheckVal(reader["Value"], 15);
break;
default:
Debug.Fail("Unexpected item");
break;
}
}
Debug.Assert(readerCount == 3);
var count = new H2Command("select count(*) from list", connection).ExecuteScalar();
Debug.Assert(((long)count).Equals(3));
var one = new H2Command("select 1 from dual", connection).ExecuteScalar();
Debug.Assert(((int)one).Equals(1));
var a = new H2Command("select 'a' from dual", connection).ExecuteScalar();
Debug.Assert(((string)a).Equals("a"));
SimpleTest(connection, "int", 10, 11, 12);
SimpleTest(connection, "bigint", (long)10, (long)11, (long)12);
SimpleTest(connection, "smallint", (short)10, (short)11, (short)12);
SimpleTest(connection, "tinyint", (byte)10, (byte)11, (byte)12);
SimpleTest(connection, "double", 10d, 11d, 12d);
SimpleTest(connection, "float", 10d, 11d, 12d); // double is float !
SimpleTest(connection, "varchar(255)", "10", "11", "12");
SimpleTest(connection, "timestamp", DateTime.Today, DateTime.Today.AddDays(1), DateTime.Today.AddDays(2));
SimpleTest(connection, "date", DateTime.Today, DateTime.Today.AddDays(1), DateTime.Today.AddDays(2));
//var x1 = table.ToXml();
}
