diff --git a/Data/ODBC/include/Poco/Data/ODBC/ODBCMetaColumn.h b/Data/ODBC/include/Poco/Data/ODBC/ODBCMetaColumn.h
index e090e3f564..f85d0c01fe 100644
--- a/Data/ODBC/include/Poco/Data/ODBC/ODBCMetaColumn.h
+++ b/Data/ODBC/include/Poco/Data/ODBC/ODBCMetaColumn.h
@@ -51,6 +51,9 @@ class ODBC_API ODBCMetaColumn: public MetaColumn
 		/// null-termination byte that ends the character string.
 		/// This information is returned from the SQL_DESC_LENGTH record field of the IRD.
 
+	bool isUnsigned() const;
+		/// Returns true if column is unsigned or a non-numeric data type.
+
 private:
 	ODBCMetaColumn();
 
diff --git a/Data/ODBC/src/ODBCMetaColumn.cpp b/Data/ODBC/src/ODBCMetaColumn.cpp
index e1b5c3a382..ff90818f63 100644
--- a/Data/ODBC/src/ODBCMetaColumn.cpp
+++ b/Data/ODBC/src/ODBCMetaColumn.cpp
@@ -21,14 +21,14 @@ namespace Data {
 namespace ODBC {
 
 
-	ODBCMetaColumn::ODBCMetaColumn(const StatementHandle& rStmt, std::size_t position) :
+ODBCMetaColumn::ODBCMetaColumn(const StatementHandle& rStmt, std::size_t position) :
 	MetaColumn(position),
 	_rStmt(rStmt)
 {
 	init();
 }
 
-	
+
 ODBCMetaColumn::~ODBCMetaColumn()
 {
 }
@@ -58,6 +58,23 @@ void ODBCMetaColumn::getDescription()
 }
 
 
+bool ODBCMetaColumn::isUnsigned() const
+{
+	SQLLEN val = 0;
+	if (Utility::isError(Poco::Data::ODBC::SQLColAttribute(_rStmt,
+		(SQLUSMALLINT)position() + 1, // ODBC columns are 1-based
+		SQL_DESC_UNSIGNED,
+		0,
+		0,
+		0,
+		&val)))
+	{
+		throw StatementException(_rStmt);
+	}
+	return (val == SQL_TRUE);
+}
+
+
 void ODBCMetaColumn::init()
 {
 	getDescription();
@@ -97,16 +114,20 @@ void ODBCMetaColumn::init()
 		setType(MetaColumn::FDT_WSTRING); break;
 
 	case SQL_TINYINT:
-		setType(MetaColumn::FDT_INT8); break;
+		setType(isUnsigned() ? MetaColumn::FDT_UINT8 : MetaColumn::FDT_INT8);
+		break;
 
 	case SQL_SMALLINT:
-		setType(MetaColumn::FDT_INT16); break;
+		setType(isUnsigned() ? MetaColumn::FDT_UINT16 : MetaColumn::FDT_INT16);
+		break;
 	
 	case SQL_INTEGER:
-		setType(MetaColumn::FDT_INT32); break;
+		setType(isUnsigned() ? MetaColumn::FDT_UINT32 : MetaColumn::FDT_INT32);
+		break;
 
 	case SQL_BIGINT:
-		setType(MetaColumn::FDT_INT64); break;
+		setType(isUnsigned() ? MetaColumn::FDT_UINT64 : MetaColumn::FDT_INT64);
+		break;
 
 	case SQL_DOUBLE:
 	case SQL_FLOAT:
diff --git a/Data/ODBC/src/SessionImpl.cpp b/Data/ODBC/src/SessionImpl.cpp
index c5be5fed0c..603a8b57b4 100644
--- a/Data/ODBC/src/SessionImpl.cpp
+++ b/Data/ODBC/src/SessionImpl.cpp
@@ -232,7 +232,11 @@ bool SessionImpl::canTransact()
 
 void SessionImpl::setTransactionIsolation(Poco::UInt32 ti)
 {
+#if POCO_PTR_IS_64_BIT
+	Poco::UInt64 isolation = 0;
+#else
 	Poco::UInt32 isolation = 0;
+#endif
 
 	if (ti & Session::TRANSACTION_READ_UNCOMMITTED)
 		isolation |= SQL_TXN_READ_UNCOMMITTED;
diff --git a/Foundation/src/ThreadPool.cpp b/Foundation/src/ThreadPool.cpp
index 385b93b367..65f946e773 100644
--- a/Foundation/src/ThreadPool.cpp
+++ b/Foundation/src/ThreadPool.cpp
@@ -181,7 +181,7 @@ void PooledThread::activate()
 void PooledThread::release()
 {
 	const long JOIN_TIMEOUT = 10000;
-	
+
 	_mutex.lock();
 	_pTarget = 0;
 	_mutex.unlock();