private void AdjustOutputTypes()
{
// since MySQL likes to return user variables as strings
// we reset the types of the readers internal value objects
// this will allow those value objects to parse the string based
// return values
for (int i = 0; i < FieldCount; i++)
{
string fieldName = GetName(i);
fieldName = fieldName.Remove(0, StoredProcedure.ParameterPrefix.Length + 1);
MyCatParameter parameter = command.Parameters.GetParameterFlexible(fieldName, true);
IMyCatValue v = MyCatField.GetIMyCatValue(parameter.MyCatDbType);
if (v is MyCatBit)
{
MyCatBit bit = (MyCatBit)v;
bit.ReadAsString = true;
resultSet.SetValueObject(i, bit);
}
else
{
resultSet.SetValueObject(i, v);
}
}
}
public MyCatField[] GetColumns(long count)
{
MyCatField[] fields = new MyCatField[count];
for (int i = 0; i < count; i++)
{
fields[i] = new MyCatField(this);
}
handler.GetColumnsData(fields);
return(fields);
}
private void GetColumnData(MyCatField 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);
MyCatDbType type = (MyCatDbType)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 == MyCatDbType.Decimal || type == MyCatDbType.NewDecimal)
{
field.Precision = (byte)(field.ColumnLength - 2);
if ((colFlags & ColumnFlags.UNSIGNED) != 0)
{
field.Precision++;
}
}
field.SetTypeAndFlags(type, colFlags);
}
public IMyCatValue ReadColumnValue(int index, MyCatField field, IMyCatValue 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 = MyCatDbType.Guid;
break;
case DbType.AnsiString:
case DbType.String:
mySqlDbType = MyCatDbType.VarChar;
break;
case DbType.AnsiStringFixedLength:
case DbType.StringFixedLength:
mySqlDbType = MyCatDbType.String;
break;
case DbType.Boolean:
case DbType.Byte:
mySqlDbType = MyCatDbType.UByte;
break;
case DbType.SByte:
mySqlDbType = MyCatDbType.Byte;
break;
case DbType.Date:
mySqlDbType = MyCatDbType.Date;
break;
case DbType.DateTime:
mySqlDbType = MyCatDbType.DateTime;
break;
case DbType.Time:
mySqlDbType = MyCatDbType.Time;
break;
case DbType.Single:
mySqlDbType = MyCatDbType.Float;
break;
case DbType.Double:
mySqlDbType = MyCatDbType.Double;
break;
case DbType.Int16:
mySqlDbType = MyCatDbType.Int16;
break;
case DbType.UInt16:
mySqlDbType = MyCatDbType.UInt16;
break;
case DbType.Int32:
mySqlDbType = MyCatDbType.Int32;
break;
case DbType.UInt32:
mySqlDbType = MyCatDbType.UInt32;
break;
case DbType.Int64:
mySqlDbType = MyCatDbType.Int64;
break;
case DbType.UInt64:
mySqlDbType = MyCatDbType.UInt64;
break;
case DbType.Decimal:
case DbType.Currency:
mySqlDbType = MyCatDbType.Decimal;
break;
case DbType.Object:
case DbType.VarNumeric:
case DbType.Binary:
default:
mySqlDbType = MyCatDbType.Blob;
break;
}
if (dbType == DbType.Object)
{
var value = this.paramValue as byte[];
if (value != null && value.Length == GEOMETRY_LENGTH)
{
mySqlDbType = MyCatDbType.Geometry;
}
}
ValueObject = MyCatField.GetIMyCatValue(mySqlDbType);
}
public IMyCatValue ReadColumnValue(int index, MyCatField field, IMyCatValue value)
{
return(handler.ReadColumnValue(index, field, value));
}
private void SetMyCatDbType(MyCatDbType mysql_dbtype)
{
mySqlDbType = mysql_dbtype;
ValueObject = MyCatField.GetIMyCatValue(mySqlDbType);
SetDbTypeFromMyCatDbType();
}
/// <summary>
/// Returns a DataTable that describes the column metadata of the MyCatDataReader.
/// </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++)
{
MyCatField 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);
}
