private ODBC32.RetCode AutoCommitOff()
{
ODBC32.RetCode retcode;
Debug.Assert(HandleState.Connected <= _handleState, "AutoCommitOff while in wrong state?");
// Avoid runtime injected errors in the following block.
// must call SQLSetConnectAttrW and set _handleState
RuntimeHelpers.PrepareConstrainedRegions();
try { }
finally
{
retcode = UnsafeNativeMethods.SQLSetConnectAttrW(this, ODBC32.SQL_ATTR.AUTOCOMMIT, ODBC32.SQL_AUTOCOMMIT_OFF, (Int32)ODBC32.SQL_IS.UINTEGER);
switch (retcode)
{
case ODBC32.RetCode.SUCCESS:
case ODBC32.RetCode.SUCCESS_WITH_INFO:
_handleState = HandleState.Transacted;
break;
}
}
ODBC.TraceODBC(3, "SQLSetConnectAttrW", retcode);
return(retcode);
}
private ODBC32.RetCode Connect(string connectionString)
{
Debug.Assert(HandleState.Allocated == _handleState, "SQLDriverConnect while in wrong state?");
ODBC32.RetCode retcode;
// Avoid runtime injected errors in the following block.
RuntimeHelpers.PrepareConstrainedRegions();
try { }
finally
{
short cbActualSize;
retcode = Interop.Odbc.SQLDriverConnectW(this, ADP.PtrZero, connectionString, ODBC32.SQL_NTS, ADP.PtrZero, 0, out cbActualSize, (short)ODBC32.SQL_DRIVER.NOPROMPT);
switch (retcode)
{
case ODBC32.RetCode.SUCCESS:
case ODBC32.RetCode.SUCCESS_WITH_INFO:
_handleState = HandleState.Connected;
break;
}
}
ODBC.TraceODBC(3, "SQLDriverConnectW", retcode);
return(retcode);
}
internal static ArgumentOutOfRangeException NotSupportedIsolationLevel(IsolationLevel value)
{
#if DEBUG
switch (value)
{
case IsolationLevel.Unspecified:
case IsolationLevel.ReadUncommitted:
case IsolationLevel.ReadCommitted:
case IsolationLevel.RepeatableRead:
case IsolationLevel.Serializable:
case IsolationLevel.Snapshot:
Debug.Fail("valid IsolationLevel " + value.ToString());
break;
case IsolationLevel.Chaos:
break;
default:
Debug.Fail("invalid IsolationLevel " + value.ToString());
break;
}
#endif
return(ODBC.NotSupportedEnumerationValue(typeof(IsolationLevel), (int)value));
}
internal ODBC32.RetCode GetDescriptionField(int i, ODBC32.SQL_DESC attribute, CNativeBuffer buffer, out int numericAttribute)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLGetDescFieldW(this, checked ((short)i), attribute, buffer, buffer.ShortLength, out numericAttribute);
ODBC.TraceODBC(3, "SQLGetDescFieldW", retcode);
return(retcode);
}
internal ODBC32.RetCode CloseCursor()
{
ODBC32.RetCode retcode = Interop.Odbc.SQLCloseCursor(this);
ODBC.TraceODBC(3, "SQLCloseCursor", retcode);
return(retcode);
}
internal ODBC32.RetCode BindColumn2(int columnNumber, ODBC32.SQL_C targetType, HandleRef buffer, IntPtr length, IntPtr srLen_or_Ind)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLBindCol(this, checked ((ushort)columnNumber), targetType, buffer, length, srLen_or_Ind);
ODBC.TraceODBC(3, "SQLBindCol", retcode);
return(retcode);
}
internal ODBC32.RetCode Prepare(string commandText)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLPrepareW(this, commandText, ODBC32.SQL_NTS);
ODBC.TraceODBC(3, "SQLPrepareW", retcode);
return(retcode);
}
internal ODBC32.RetCode MoreResults()
{
ODBC32.RetCode retcode = Interop.Odbc.SQLMoreResults(this);
ODBC.TraceODBC(3, "SQLMoreResults", retcode);
return(retcode);
}
internal ODBC32.RetCode GetStatementAttribute(ODBC32.SQL_ATTR attribute, out IntPtr value, out int stringLength)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLGetStmtAttrW(this, attribute, out value, ADP.PtrSize, out stringLength);
ODBC.TraceODBC(3, "SQLGetStmtAttrW", retcode);
return(retcode);
}
internal ODBC32.RetCode SetConnectionAttribute2(ODBC32.SQL_ATTR attribute, IntPtr value, int length)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLSetConnectAttrW(this, attribute, value, length);
ODBC.TraceODBC(3, "SQLSetConnectAttrW", retcode);
return(retcode);
}
internal ODBC32.RetCode GetFunctions(ODBC32.SQL_API fFunction, out short fExists)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLGetFunctions(this, fFunction, out fExists);
ODBC.TraceODBC(3, "SQLGetFunctions", retcode);
return(retcode);
}
internal ODBC32.RetCode SpecialColumns(string quotedTable)
{
ODBC32.RetCode retcode = UnsafeNativeMethods.SQLSpecialColumnsW(this,
ODBC32.SQL_SPECIALCOLS.ROWVER, null, 0, null, 0,
quotedTable, ODBC.ShortStringLength(quotedTable),
ODBC32.SQL_SCOPE.SESSION, ODBC32.SQL_NULLABILITY.NO_NULLS);
ODBC.TraceODBC(3, "SQLSpecialColumnsW", retcode);
return(retcode);
}
internal ODBC32.RetCode PrimaryKeys(string catalogName, string schemaName, string tableName)
{
ODBC32.RetCode retcode = UnsafeNativeMethods.SQLPrimaryKeysW(this,
catalogName, ODBC.ShortStringLength(catalogName), // CatalogName
schemaName, ODBC.ShortStringLength(schemaName), // SchemaName
tableName, ODBC.ShortStringLength(tableName) // TableName
);
ODBC.TraceODBC(3, "SQLPrimaryKeysW", retcode);
return(retcode);
}
internal ODBC32.RetCode Prepare(string commandText)
{
ODBC32.RetCode retcode = UnsafeNativeMethods.SQLPrepareW(this, commandText, ODBC32.SQL_NTS);
ODBC.TraceODBC(3, "SQLPrepareW", retcode);
return(retcode);
}
internal ODBC32.RetCode NumberOfResultColumns(out short columnsAffected)
{
ODBC32.RetCode retcode = UnsafeNativeMethods.SQLNumResultCols(this, out columnsAffected);
ODBC.TraceODBC(3, "SQLNumResultCols", retcode);
return(retcode);
}
internal ODBC32.RetCode Fetch()
{
ODBC32.RetCode retcode = Interop.Odbc.SQLFetch(this);
ODBC.TraceODBC(3, "SQLFetch", retcode);
return(retcode);
}
internal ODBC32.RetCode FreeStatement(ODBC32.STMT stmt)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLFreeStmt(this, stmt);
ODBC.TraceODBC(3, "SQLFreeStmt", retcode);
return(retcode);
}
internal ODBC32.RetCode SetConnectionAttribute4(ODBC32.SQL_ATTR attribute, System.Transactions.IDtcTransaction transaction, int length)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLSetConnectAttrW(this, attribute, transaction, length);
ODBC.TraceODBC(3, "SQLSetConnectAttrW", retcode);
return(retcode);
}
internal ODBC32.RetCode GetTypeInfo(short fSqlType)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLGetTypeInfo(this, fSqlType);
ODBC.TraceODBC(3, "SQLGetTypeInfo", retcode);
return(retcode);
}
internal ODBC32.RetCode GetFunctions(ODBC32.SQL_API fFunction, out Int16 fExists)
{
ODBC32.RetCode retcode = UnsafeNativeMethods.SQLGetFunctions(this, fFunction, out fExists);
ODBC.TraceODBC(3, "SQLGetFunctions", retcode);
return(retcode);
}
internal ODBC32.RetCode NumberOfResultColumns(out short columnsAffected)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLNumResultCols(this, out columnsAffected);
ODBC.TraceODBC(3, "SQLNumResultCols", retcode);
return(retcode);
}
internal ODBC32.RetCode SetConnectionAttribute2(ODBC32.SQL_ATTR attribute, IntPtr value, Int32 length)
{
ODBC32.RetCode retcode = UnsafeNativeMethods.SQLSetConnectAttrW(this, attribute, value, length);
ODBC.TraceODBC(3, "SQLSetConnectAttrW", retcode);
return(retcode);
}
internal ODBC32.RetCode SetStatementAttribute(ODBC32.SQL_ATTR attribute, IntPtr value, ODBC32.SQL_IS stringLength)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLSetStmtAttrW(this, (int)attribute, value, (int)stringLength);
ODBC.TraceODBC(3, "SQLSetStmtAttrW", retcode);
return(retcode);
}
internal ODBC32.RetCode SetConnectionAttribute4(ODBC32.SQL_ATTR attribute, System.Transactions.IDtcTransaction transaction, Int32 length)
{
ODBC32.RetCode retcode = UnsafeNativeMethods.SQLSetConnectAttrW(this, attribute, transaction, length);
ODBC.TraceODBC(3, "SQLSetConnectAttrW", retcode);
return(retcode);
}
internal ODBC32.RetCode BindColumn3(int columnNumber, ODBC32.SQL_C targetType, IntPtr srLen_or_Ind)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLBindCol(this, checked ((ushort)columnNumber), targetType, ADP.PtrZero, ADP.PtrZero, srLen_or_Ind);
ODBC.TraceODBC(3, "SQLBindCol", retcode);
return(retcode);
}
internal ODBC32.RetCode BeginTransaction(ref IsolationLevel isolevel)
{
ODBC32.RetCode retcode = ODBC32.RetCode.SUCCESS;
ODBC32.SQL_ATTR isolationAttribute;
if (IsolationLevel.Unspecified != isolevel)
{
ODBC32.SQL_TRANSACTION sql_iso;
switch (isolevel)
{
case IsolationLevel.ReadUncommitted:
sql_iso = ODBC32.SQL_TRANSACTION.READ_UNCOMMITTED;
isolationAttribute = ODBC32.SQL_ATTR.TXN_ISOLATION;
break;
case IsolationLevel.ReadCommitted:
sql_iso = ODBC32.SQL_TRANSACTION.READ_COMMITTED;
isolationAttribute = ODBC32.SQL_ATTR.TXN_ISOLATION;
break;
case IsolationLevel.RepeatableRead:
sql_iso = ODBC32.SQL_TRANSACTION.REPEATABLE_READ;
isolationAttribute = ODBC32.SQL_ATTR.TXN_ISOLATION;
break;
case IsolationLevel.Serializable:
sql_iso = ODBC32.SQL_TRANSACTION.SERIALIZABLE;
isolationAttribute = ODBC32.SQL_ATTR.TXN_ISOLATION;
break;
case IsolationLevel.Snapshot:
sql_iso = ODBC32.SQL_TRANSACTION.SNAPSHOT;
// VSDD 414121: Snapshot isolation level must be set through SQL_COPT_SS_TXN_ISOLATION (http://msdn.microsoft.com/en-us/library/ms131709.aspx)
isolationAttribute = ODBC32.SQL_ATTR.SQL_COPT_SS_TXN_ISOLATION;
break;
case IsolationLevel.Chaos:
throw ODBC.NotSupportedIsolationLevel(isolevel);
default:
throw ADP.InvalidIsolationLevel(isolevel);
}
//Set the isolation level (unless its unspecified)
retcode = SetConnectionAttribute2(isolationAttribute, (IntPtr)sql_iso, (Int32)ODBC32.SQL_IS.INTEGER);
//Note: The Driver can return success_with_info to indicate it "rolled" the
//isolevel to the next higher value. If this is the case, we need to requery
//the value if th euser asks for it...
//We also still propagate the info, since it could be other info as well...
if (ODBC32.RetCode.SUCCESS_WITH_INFO == retcode)
{
isolevel = IsolationLevel.Unspecified;
}
}
switch (retcode)
{
case ODBC32.RetCode.SUCCESS:
case ODBC32.RetCode.SUCCESS_WITH_INFO:
//Turn off auto-commit (which basically starts the transaction)
retcode = AutoCommitOff();
_handleState = HandleState.TransactionInProgress;
break;
}
return(retcode);
}
protected OdbcHandle(ODBC32.SQL_HANDLE handleType, OdbcHandle parentHandle) : base(IntPtr.Zero, true)
{
_handleType = handleType;
bool mustRelease = false;
ODBC32.RetCode retcode = ODBC32.RetCode.SUCCESS;
// using ConstrainedRegions to make the native ODBC call and AddRef the parent
RuntimeHelpers.PrepareConstrainedRegions();
try
{
// validate handleType
switch (handleType)
{
case ODBC32.SQL_HANDLE.ENV:
Debug.Assert(null == parentHandle, "did not expect a parent handle");
retcode = Interop.Odbc.SQLAllocHandle(handleType, IntPtr.Zero, out base.handle);
break;
case ODBC32.SQL_HANDLE.DBC:
case ODBC32.SQL_HANDLE.STMT:
// must addref before calling native so it won't be released just after
Debug.Assert(null != parentHandle, "expected a parent handle"); // safehandle can't be null
parentHandle.DangerousAddRef(ref mustRelease);
retcode = Interop.Odbc.SQLAllocHandle(handleType, parentHandle, out base.handle);
break;
// case ODBC32.SQL_HANDLE.DESC:
default:
Debug.Fail("unexpected handleType");
break;
}
}
finally
{
if (mustRelease)
{
switch (handleType)
{
case ODBC32.SQL_HANDLE.DBC:
case ODBC32.SQL_HANDLE.STMT:
if (IntPtr.Zero != base.handle)
{
// must assign _parentHandle after a handle is actually created
// since ReleaseHandle will only call DangerousRelease if a handle exists
_parentHandle = parentHandle;
}
else
{
// without a handle, ReleaseHandle may not be called
parentHandle.DangerousRelease();
}
break;
}
}
}
if ((ADP.PtrZero == base.handle) || (ODBC32.RetCode.SUCCESS != retcode))
{
//
throw ODBC.CantAllocateEnvironmentHandle(retcode);
}
}
internal ODBC32.RetCode Execute()
{
ODBC32.RetCode retcode = Interop.Odbc.SQLExecute(this);
ODBC.TraceODBC(3, "SQLExecute", retcode);
return(retcode);
}
internal ODBC32.RetCode SetDescriptionField2(short ordinal, ODBC32.SQL_DESC type, HandleRef value)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLSetDescFieldW(this, ordinal, type, value, 0);
ODBC.TraceODBC(3, "SQLSetDescFieldW", retcode);
return(retcode);
}
internal ODBC32.RetCode ExecuteDirect(string commandText)
{
ODBC32.RetCode retcode = Interop.Odbc.SQLExecDirectW(this, commandText, ODBC32.SQL_NTS);
ODBC.TraceODBC(3, "SQLExecDirectW", retcode);
return(retcode);
}
