internal IntPtr GetAttributeIntPtr(OciAttributeType attrType, OciErrorHandle errorHandle)
{
int status = 0;
IntPtr output = IntPtr.Zero;
status = OciCalls.OCIAttrGetIntPtr(Handle,
HandleType,
out output,
IntPtr.Zero,
attrType,
errorHandle);
if (status != 0)
{
OciErrorInfo info = errorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
return(output);
}
public void Commit()
{
int status = 0;
AttachToServiceContext();
try
{
status = OciCalls.OCITransCommit(Service, ErrorHandle, 0);
if (status != 0)
{
OciErrorInfo info = ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
}
finally
{
DetachFromServiceContext();
}
}
void DefineLongVarChar(int position, OracleConnection connection)
{
fieldType = typeof(System.String);
// LONG VARCHAR max length is 2 to the 31 power - 5
// the first 4 bytes of a LONG VARCHAR value contains the length
// Int32.MaxValue - 5 causes out of memory in mono on win32
// because I do not have 2GB of memory available
// so Int16.MaxValue - 5 is used instead.
// LAMESPEC for Oracle OCI - you can not get the length of the LONG VARCHAR value
// until after you get the value. This could be why Oracle deprecated LONG VARCHAR.
// If you specify a definedSize less then the length of the column value,
// then you will get an OCI_ERROR ORA-01406: fetched column value was truncated
// TODO: get via piece-wise - a chunk at a time
definedSize = LongVarCharMaxValue;
value = OciCalls.AllocateClear(definedSize);
ociType = OciDataType.LongVarChar;
int status = 0;
status = OciCalls.OCIDefineByPos(Parent,
out handle,
ErrorHandle,
position + 1,
value,
definedSize,
ociType,
indicator,
rlenp,
IntPtr.Zero, 0);
Size = (short)definedSize;
if (status != 0)
{
OciErrorInfo info = ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
}
protected override void FreeHandle()
{
// Parameter handles are disposed implicitely
if (HandleType >= OciHandleType.LobLocator)
{
switch (HandleType)
{
case OciHandleType.Parameter:
case OciHandleType.TimeStamp:
break;
default:
if (Handle != IntPtr.Zero)
{
OciCalls.OCIDescriptorFree(this, HandleType);
SetHandle(IntPtr.Zero);
}
break;
}
}
}
public void Prepare(string commandText)
{
int status = 0;
if (this.disposed)
{
throw new InvalidOperationException("StatementHandle is already disposed.");
}
ulong rsize = 0;
byte [] buffer;
UIntPtr rsizep = new UIntPtr(rsize);
// Get size of buffer
OciCalls.OCIUnicodeToCharSet(Parent, null, commandText, ref rsizep);
rsize = rsizep.ToUInt64();
//rsize = Encoding.UTF8.GetMaxByteCount (commandText.Length+1);
// Fill buffer
buffer = new byte[rsize];
OciCalls.OCIUnicodeToCharSet(Parent, buffer, commandText, ref rsizep);
// Execute statement
status = OciCalls.OCIStmtPrepare(this,
ErrorHandle,
buffer,
buffer.Length,
OciStatementLanguage.NTV,
OciStatementMode.Default);
if (status != 0)
{
OciErrorInfo info = ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
}
public long GetLength(bool binary)
{
int status = 0;
uint output;
status = OciCalls.OCILobGetLength(Service,
ErrorHandle,
this,
out output);
if (status != 0)
{
OciErrorInfo info = ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
if (!binary)
{
output *= 2;
}
return((long)output);
}
public OciParameterDescriptor GetParameter(int position)
{
IntPtr handle = IntPtr.Zero;
int status = 0;
status = OciCalls.OCIParamGet(this,
OciHandleType.Statement,
ErrorHandle,
out handle,
position + 1);
if (status != 0)
{
OciErrorInfo info = ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
OciParameterDescriptor output = new OciParameterDescriptor(this, handle);
output.ErrorHandle = ErrorHandle;
return(output);
}
void DefineTimeStamp(int position, OracleConnection connection)
{
definedSize = -1;
ociType = OciDataType.TimeStamp;
fieldType = typeof(System.DateTime);
dateTimeDesc = (OciDateTimeDescriptor)connection.Environment.Allocate(OciHandleType.TimeStamp);
if (dateTimeDesc == null)
{
OciErrorInfo info = connection.ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
value = dateTimeDesc.Handle;
dateTimeDesc.ErrorHandle = ErrorHandle;
int status = 0;
status = OciCalls.OCIDefineByPosPtr(Parent,
out handle,
ErrorHandle,
position + 1,
ref value,
definedSize,
ociType,
indicator,
rlenp,
IntPtr.Zero,
0);
definedSize = 11;
if (status != 0)
{
OciErrorInfo info = connection.ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
}
public bool Fetch()
{
int status = 0;
if (this.disposed)
{
throw new InvalidOperationException("StatementHandle is already disposed.");
}
status = OciCalls.OCIStmtFetch(Handle,
ErrorHandle.Handle,
1,
2,
0);
switch (status)
{
case OciGlue.OCI_NO_DATA:
moreResults = false;
break;
case OciGlue.OCI_DEFAULT:
moreResults = true;
break;
case OciGlue.OCI_SUCCESS_WITH_INFO:
//OciErrorInfo ei = ErrorHandle.HandleError ();
//command.Connection.CreateInfoMessage (ei);
moreResults = true;
break;
default:
OciErrorInfo info = ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
return(moreResults);
}
internal object GetValue(IFormatProvider formatProvider, OracleConnection conn)
{
object tmp;
byte [] buffer = null;
switch (DataType)
{
case OciDataType.VarChar2:
case OciDataType.String:
case OciDataType.VarChar:
case OciDataType.Char:
case OciDataType.CharZ:
case OciDataType.OciString:
case OciDataType.RowIdDescriptor:
buffer = new byte [Size];
Marshal.Copy(Value, buffer, 0, Size);
// Get length of returned string
int rsize = 0;
//IntPtr env = Parent.Parent; // Parent is statement, grandparent is environment
IntPtr env = conn.Environment;
int status = OciCalls.OCICharSetToUnicode(env, null, buffer, out rsize);
OciErrorHandle.ThrowExceptionIfError(ErrorHandle, status);
// Get string
StringBuilder ret = new StringBuilder(rsize);
status = OciCalls.OCICharSetToUnicode(env, ret, buffer, out rsize);
OciErrorHandle.ThrowExceptionIfError(ErrorHandle, status);
return(ret.ToString(0, rsize));
case OciDataType.LongVarChar:
case OciDataType.Long:
buffer = new byte [LongVarCharMaxValue];
Marshal.Copy(Value, buffer, 0, buffer.Length);
int longSize = 0;
if (BitConverter.IsLittleEndian)
{
longSize = BitConverter.ToInt32(new byte[] { buffer[0], buffer[1], buffer[2], buffer[3] }, 0);
}
else
{
longSize = BitConverter.ToInt32(new byte[] { buffer[3], buffer[2], buffer[1], buffer[0] }, 0);
}
ASCIIEncoding encoding = new ASCIIEncoding();
string e = encoding.GetString(buffer, 4, longSize);
return(e);
case OciDataType.Integer:
case OciDataType.Number:
case OciDataType.Float:
case OciDataType.VarNum:
case OciDataType.UnsignedInt:
tmp = Marshal.PtrToStringAnsi(Value, Size);
if (tmp != null)
{
return(Decimal.Parse(String.Copy((string)tmp), formatProvider));
}
break;
case OciDataType.TimeStamp:
return(dateTimeDesc.GetDateTime(conn.Environment, dateTimeDesc.ErrorHandle));
case OciDataType.Date:
return(UnpackDate());
case OciDataType.Raw:
case OciDataType.VarRaw:
byte [] raw_buffer = new byte [Size];
Marshal.Copy(Value, raw_buffer, 0, Size);
return(raw_buffer);
case OciDataType.LongRaw:
case OciDataType.LongVarRaw:
buffer = new byte [LongVarRawMaxValue];
Marshal.Copy(Value, buffer, 0, buffer.Length);
int longrawSize = 0;
if (BitConverter.IsLittleEndian)
{
longrawSize = BitConverter.ToInt32(new byte[] { buffer[0], buffer[1], buffer[2], buffer[3] }, 0);
}
else
{
longrawSize = BitConverter.ToInt32(new byte[] { buffer[3], buffer[2], buffer[1], buffer[0] }, 0);
}
byte[] longraw_buffer = new byte [longrawSize];
Array.ConstrainedCopy(buffer, 4, longraw_buffer, 0, longrawSize);
return(longraw_buffer);
case OciDataType.Blob:
case OciDataType.Clob:
return(GetOracleLob());
case OciDataType.IntervalDayToSecond:
return(new OracleTimeSpan(intervalDesc.GetDayToSecond(conn.Environment, intervalDesc.ErrorHandle)));
case OciDataType.IntervalYearToMonth:
return(new OracleMonthSpan(intervalDesc.GetYearToMonth(conn.Environment, intervalDesc.ErrorHandle)));
default:
throw new Exception("OciDataType not implemented: " + DataType.ToString());
}
return(DBNull.Value);
}
internal OciHandle Allocate(OciHandleType type)
{
int status = 0;
IntPtr newHandle = IntPtr.Zero;
if (type < OciHandleType.LobLocator)
{
status = OciCalls.OCIHandleAlloc(this,
out newHandle,
type,
0,
IntPtr.Zero);
}
else
{
status = OciCalls.OCIDescriptorAlloc(this,
out newHandle,
type,
0,
IntPtr.Zero);
}
if (status != 0 && status != 1)
{
throw new Exception(String.Format("Could not allocate new OCI Handle of type {0}", type));
}
switch (type)
{
case OciHandleType.Service:
return(new OciServiceHandle(this, newHandle));
case OciHandleType.Error:
return(new OciErrorHandle(this, newHandle));
case OciHandleType.Server:
return(new OciServerHandle(this, newHandle));
case OciHandleType.Session:
return(new OciSessionHandle(this, newHandle));
case OciHandleType.Statement:
return(new OciStatementHandle(this, newHandle));
case OciHandleType.Transaction:
return(new OciTransactionHandle(this, newHandle));
case OciHandleType.LobLocator:
return(new OciLobLocator(this, newHandle));
case OciHandleType.RowId:
return(new OciRowIdDescriptor(this, newHandle));
case OciHandleType.TimeStamp:
return(new OciDateTimeDescriptor(this, newHandle));
case OciHandleType.IntervalDayToSecond:
case OciHandleType.IntervalYearToMonth:
return(new OciIntervalDescriptor(this, type, newHandle));
}
return(null);
}
public bool Execute(bool nonQuery, bool useAutoCommit, bool schemaOnly)
{
int status = 0;
columnCount = 0;
moreResults = false;
int executeMode;
if (useAutoCommit)
{
executeMode = (int)OciExecuteMode.CommitOnSuccess;
}
else
{
if (schemaOnly)
{
executeMode = (int)OciExecuteMode.DescribeOnly;
}
else
{
executeMode = (int)OciExecuteMode.Default;
}
}
if (this.disposed)
{
throw new InvalidOperationException("StatementHandle is already disposed.");
}
status = OciCalls.OCIStmtExecute(Service,
Handle,
ErrorHandle,
nonQuery,
0,
IntPtr.Zero,
IntPtr.Zero,
(OciExecuteMode)executeMode);
switch (status)
{
case OciGlue.OCI_DEFAULT:
if (!nonQuery)
{
GetColumnCount();
Define();
moreResults = true;
}
break;
case OciGlue.OCI_NO_DATA:
break;
case OciGlue.OCI_INVALID_HANDLE:
throw new OracleException(0, "Invalid handle.");
default:
OciErrorInfo info = ErrorHandle.HandleError();
throw new OracleException(info.ErrorCode, info.ErrorMessage);
}
return(true);
}
