IEnumerable <ITreeNode> ITreeNode.GetChildren(bool refresh)
{
var commandText = "SELECT * FROM INFORMATION_SCHEMA.TABLES";
var executor = _connection.CreateCommandExecutor();
var dataTable = executor.ExecuteDataTable(new ExecuteReaderRequest(commandText));
var nodes = new List <ITreeNode>();
foreach (DataRow dataRow in dataTable.Rows)
{
var tableName = (string)dataRow["TABLE_NAME"];
var tableNode = new TableNode(tableName);
nodes.Add(tableNode);
}
return(nodes);
}
void IResultWriter.WriteTableBegin(DataTable schemaTable)
{
var createTable = new StringBuilder();
createTable.AppendFormat("create table [{0}]\r\n(\r\n", _tableName);
var insertInto = new StringBuilder();
insertInto.AppendFormat("insert into [{0}](", _tableName);
var values = new StringBuilder();
values.Append("values(");
var stringTable = new StringTable(3);
_insertCommand = _connection.CreateCommand();
var last = schemaTable.Rows.Count - 1;
for (var i = 0; i <= last; i++)
{
var dataRow = schemaTable.Rows[i];
var schemaRow = FoundationDbColumnFactory.Create(dataRow);
var columnName = schemaRow.ColumnName;
var columnSize = schemaRow.ColumnSize;
var allowDbNull = schemaRow.AllowDbNull;
var dataType = schemaRow.DataType;
var dataTypeName = "???";
var typeCode = Type.GetTypeCode(dataType);
string typeName;
SqlDbType sqlDbType;
switch (typeCode)
{
case TypeCode.Boolean:
typeName = "bit";
sqlDbType = SqlDbType.Bit;
break;
case TypeCode.DateTime:
typeName = "datetime";
sqlDbType = SqlDbType.DateTime;
break;
case TypeCode.Decimal:
sqlDbType = SqlDbType.Decimal;
var precision = schemaRow.NumericPrecision.Value;
var scale = schemaRow.NumericScale.Value;
if (precision > 38)
{
precision = 38;
}
if (scale > 38)
{
scale = 38;
}
if (precision < scale)
{
precision = scale;
}
if (scale == 0)
{
typeName = $"decimal({precision})";
}
else
{
typeName = $"decimal({precision},{scale})";
}
break;
case TypeCode.Double:
typeName = "float";
sqlDbType = SqlDbType.Float;
break;
case TypeCode.Int16:
typeName = "smallint";
sqlDbType = SqlDbType.SmallInt;
break;
case TypeCode.Int32:
typeName = "int";
sqlDbType = SqlDbType.Int;
break;
case TypeCode.Int64:
typeName = "bigint";
sqlDbType = SqlDbType.BigInt;
break;
case TypeCode.Single:
typeName = "real";
sqlDbType = SqlDbType.Real;
break;
case TypeCode.String:
bool isFixedLength;
var dataTypeNameUpper = dataTypeName.ToUpper();
switch (dataTypeName)
{
case "CHAR":
case "NCHAR":
isFixedLength = true;
break;
case "VARCHAR":
case "NVARCHAR":
case "VARCHAR2":
default:
isFixedLength = false;
break;
}
if (columnSize <= 4000)
{
if (isFixedLength)
{
typeName = $"nchar({columnSize})";
sqlDbType = SqlDbType.NChar;
}
else
{
typeName = $"nvarchar({columnSize})";
sqlDbType = SqlDbType.NVarChar;
}
}
else
{
typeName = "ntext";
sqlDbType = SqlDbType.NText;
}
break;
default:
throw new NotImplementedException();
}
var row = stringTable.NewRow();
row[1] = columnName;
row[2] = typeName;
if (allowDbNull != null && !allowDbNull.Value)
{
row[2] += " not null";
}
insertInto.Append(columnName);
values.Append('?');
if (i < last)
{
row[2] += ',';
insertInto.Append(',');
values.Append(',');
}
stringTable.Rows.Add(row);
var parameter = new SqlCeParameter(null, sqlDbType);
_insertCommand.Parameters.Add(parameter);
}
createTable.AppendLine(stringTable.ToString(4));
createTable.Append(')');
var commandText = createTable.ToString();
_messageWriter.WriteLine(commandText);
var executor = _connection.CreateCommandExecutor();
executor.ExecuteNonQuery(new CreateCommandRequest(commandText));
insertInto.Append(") ");
values.Append(')');
insertInto.Append(values);
var insertCommandText = insertInto.ToString();
_messageWriter.WriteLine(insertCommandText);
_insertCommand.CommandText = insertInto.ToString();
}