public IMySqlValue ReadColumnValue(int index, MySqlField field, IMySqlValue value)
{
return handler.ReadColumnValue(index, field, value);
}
public MySqlField[] GetColumns(long count)
{
MySqlField[] fields = new MySqlField[count];
for (int i = 0; i < count; i++)
fields[i] = new MySqlField(this);
handler.GetColumnsData(fields);
return fields;
}
public virtual int PrepareStatement(string sql, ref MySqlField[] parameters)
{
return handler.PrepareStatement(sql, ref parameters);
}
public int PrepareStatement(string sql, ref MySqlField[] parameters)
{
//TODO: check this
//ClearFetchedRow();
packet.Length = sql.Length * 4 + 5;
byte[] buffer = packet.Buffer;
int len = Encoding.GetBytes(sql, 0, sql.Length, packet.Buffer, 5);
packet.Position = len + 5;
buffer[4] = (byte)DBCmd.PREPARE;
ExecutePacket(packet);
packet = stream.ReadPacket();
int marker = packet.ReadByte();
if (marker != 0)
throw new MySqlException("Expected prepared statement marker");
int statementId = packet.ReadInteger(4);
int numCols = packet.ReadInteger(2);
int numParams = packet.ReadInteger(2);
//TODO: find out what this is needed for
packet.ReadInteger(3);
if (numParams > 0)
{
parameters = owner.GetColumns(numParams);
// we set the encoding for each parameter back to our connection encoding
// since we can't trust what is coming back from the server
for (int i = 0; i < parameters.Length; i++)
parameters[i].Encoding = Encoding;
}
if (numCols > 0)
{
while (numCols-- > 0)
{
packet = stream.ReadPacket();
//TODO: handle streaming packets
}
ReadEOF();
}
return statementId;
}
private void SetMySqlDbType(MySqlDbType mysql_dbtype)
{
mySqlDbType = mysql_dbtype;
ValueObject = MySqlField.GetIMySqlValue(mySqlDbType);
SetDbTypeFromMySqlDbType();
}
public void GetColumnsData(MySqlField[] columns)
{
for (int i = 0; i < columns.Length; i++)
GetColumnData(columns[i]);
ReadEOF();
}
private void GetColumnData(MySqlField field)
{
stream.Encoding = Encoding;
packet = stream.ReadPacket();
field.Encoding = Encoding;
field.CatalogName = packet.ReadLenString();
field.DatabaseName = packet.ReadLenString();
field.TableName = packet.ReadLenString();
field.RealTableName = packet.ReadLenString();
field.ColumnName = packet.ReadLenString();
field.OriginalColumnName = packet.ReadLenString();
packet.ReadByte();
field.CharacterSetIndex = packet.ReadInteger(2);
field.ColumnLength = packet.ReadInteger(4);
MySqlDbType type = (MySqlDbType)packet.ReadByte();
ColumnFlags colFlags;
if ((connectionFlags & ClientFlags.LONG_FLAG) != 0)
colFlags = (ColumnFlags)packet.ReadInteger(2);
else
colFlags = (ColumnFlags)packet.ReadByte();
field.Scale = (byte)packet.ReadByte();
if (packet.HasMoreData)
{
packet.ReadInteger(2); // reserved
}
if (type == MySqlDbType.Decimal || type == MySqlDbType.NewDecimal)
{
field.Precision = (byte)(field.ColumnLength - 2);
if ((colFlags & ColumnFlags.UNSIGNED) != 0)
field.Precision++;
}
field.SetTypeAndFlags(type, colFlags);
}
public IMySqlValue ReadColumnValue(int index, MySqlField field, IMySqlValue valObject)
{
long length = -1;
bool isNull;
if (nullMap != null)
isNull = nullMap[index + 2];
else
{
length = packet.ReadFieldLength();
isNull = length == -1;
}
packet.Encoding = field.Encoding;
packet.Version = version;
return valObject.ReadValue(packet, length, isNull);
}
private void SetDbType(DbType db_type)
{
dbType = db_type;
switch (dbType)
{
case DbType.Guid:
mySqlDbType = MySqlDbType.Guid;
break;
case DbType.AnsiString:
case DbType.String:
mySqlDbType = MySqlDbType.VarChar;
break;
case DbType.AnsiStringFixedLength:
case DbType.StringFixedLength:
mySqlDbType = MySqlDbType.String;
break;
case DbType.Boolean:
case DbType.Byte:
mySqlDbType = MySqlDbType.UByte;
break;
case DbType.SByte:
mySqlDbType = MySqlDbType.Byte;
break;
case DbType.Date:
mySqlDbType = MySqlDbType.Date;
break;
case DbType.DateTime:
mySqlDbType = MySqlDbType.DateTime;
break;
case DbType.Time:
mySqlDbType = MySqlDbType.Time;
break;
case DbType.Single:
mySqlDbType = MySqlDbType.Float;
break;
case DbType.Double:
mySqlDbType = MySqlDbType.Double;
break;
case DbType.Int16:
mySqlDbType = MySqlDbType.Int16;
break;
case DbType.UInt16:
mySqlDbType = MySqlDbType.UInt16;
break;
case DbType.Int32:
mySqlDbType = MySqlDbType.Int32;
break;
case DbType.UInt32:
mySqlDbType = MySqlDbType.UInt32;
break;
case DbType.Int64:
mySqlDbType = MySqlDbType.Int64;
break;
case DbType.UInt64:
mySqlDbType = MySqlDbType.UInt64;
break;
case DbType.Decimal:
case DbType.Currency:
mySqlDbType = MySqlDbType.Decimal;
break;
case DbType.Object:
case DbType.VarNumeric:
case DbType.Binary:
default:
mySqlDbType = MySqlDbType.Blob;
break;
}
if (dbType == DbType.Object)
{
var value = this.paramValue as byte[];
if (value != null && value.Length == GEOMETRY_LENGTH)
{
mySqlDbType = MySqlDbType.Geometry;
}
}
ValueObject = MySqlField.GetIMySqlValue(mySqlDbType);
}
public IMySqlValue ReadColumnValue(int index, MySqlField field, IMySqlValue value)
{
return(handler.ReadColumnValue(index, field, value));
}
public override int PrepareStatement(string sql, ref MySqlField[] parameters)
{
int statementId = base.PrepareStatement(sql, ref parameters);
MySqlTrace.TraceEvent(TraceEventType.Information, MySqlTraceEventType.StatementPrepared,
Resources.TraceStatementPrepared, driverId, sql, statementId);
return statementId;
}
/// <summary>
/// Returns a DataTable that describes the column metadata of the MySqlDataReader.
/// </summary>
/// <returns></returns>
public override DataTable GetSchemaTable()
{
// Only Results from SQL SELECT Queries
// get a DataTable for schema of the result
// otherwise, DataTable is null reference
if (FieldCount == 0)
{
return(null);
}
DataTable dataTableSchema = new DataTable("SchemaTable");
dataTableSchema.Columns.Add("ColumnName", typeof(string));
dataTableSchema.Columns.Add("ColumnOrdinal", typeof(int));
dataTableSchema.Columns.Add("ColumnSize", typeof(int));
dataTableSchema.Columns.Add("NumericPrecision", typeof(int));
dataTableSchema.Columns.Add("NumericScale", typeof(int));
dataTableSchema.Columns.Add("IsUnique", typeof(bool));
dataTableSchema.Columns.Add("IsKey", typeof(bool));
DataColumn dc = dataTableSchema.Columns["IsKey"];
dc.AllowDBNull = true; // IsKey can have a DBNull
dataTableSchema.Columns.Add("BaseCatalogName", typeof(string));
dataTableSchema.Columns.Add("BaseColumnName", typeof(string));
dataTableSchema.Columns.Add("BaseSchemaName", typeof(string));
dataTableSchema.Columns.Add("BaseTableName", typeof(string));
dataTableSchema.Columns.Add("DataType", typeof(Type));
dataTableSchema.Columns.Add("AllowDBNull", typeof(bool));
dataTableSchema.Columns.Add("ProviderType", typeof(int));
dataTableSchema.Columns.Add("IsAliased", typeof(bool));
dataTableSchema.Columns.Add("IsExpression", typeof(bool));
dataTableSchema.Columns.Add("IsIdentity", typeof(bool));
dataTableSchema.Columns.Add("IsAutoIncrement", typeof(bool));
dataTableSchema.Columns.Add("IsRowVersion", typeof(bool));
dataTableSchema.Columns.Add("IsHidden", typeof(bool));
dataTableSchema.Columns.Add("IsLong", typeof(bool));
dataTableSchema.Columns.Add("IsReadOnly", typeof(bool));
int ord = 1;
for (int i = 0; i < FieldCount; i++)
{
MySqlField f = resultSet.Fields[i];
DataRow r = dataTableSchema.NewRow();
r["ColumnName"] = f.ColumnName;
r["ColumnOrdinal"] = ord++;
r["ColumnSize"] = f.IsTextField ? f.ColumnLength / f.MaxLength : f.ColumnLength;
int prec = f.Precision;
int pscale = f.Scale;
if (prec != -1)
{
r["NumericPrecision"] = (short)prec;
}
if (pscale != -1)
{
r["NumericScale"] = (short)pscale;
}
r["DataType"] = GetFieldType(i);
r["ProviderType"] = (int)f.Type;
r["IsLong"] = f.IsBlob && f.ColumnLength > 255;
r["AllowDBNull"] = f.AllowsNull;
r["IsReadOnly"] = false;
r["IsRowVersion"] = false;
r["IsUnique"] = false;
r["IsKey"] = f.IsPrimaryKey;
r["IsAutoIncrement"] = f.IsAutoIncrement;
r["BaseSchemaName"] = f.DatabaseName;
r["BaseCatalogName"] = null;
r["BaseTableName"] = f.RealTableName;
r["BaseColumnName"] = f.OriginalColumnName;
dataTableSchema.Rows.Add(r);
}
return(dataTableSchema);
}
