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diff --git a/gcsdk/steamextra/gamecoordinator/igcsqlquery.h b/gcsdk/steamextra/gamecoordinator/igcsqlquery.h
new file mode 100644
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+++ b/gcsdk/steamextra/gamecoordinator/igcsqlquery.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================
+
+#ifndef IGCSQLQUERY_H
+#define IGCSQLQUERY_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+// the type of the parameter
+enum EGCSQLType
+{
+	k_EGCSQLTypeInvalid = -1,
+	
+	// Variable length types
+	k_EGCSQLType_Blob,
+	k_EGCSQLType_String,
+
+	// fixed length types
+	k_EGCSQLType_int8,			// also uint8
+	k_EGCSQLType_int16,			// also uint16
+	k_EGCSQLType_int32,			// also uint32
+	k_EGCSQLType_int64,			// also uint64
+	k_EGCSQLType_float,
+	k_EGCSQLType_double,
+	k_EGCSQLType_Binary,	// raw binary data of fixed size (i.e. a C struct).
+	k_EGCSQLType_Image,
+	k_EGCSQLType_bool,
+};
+
+class IGCSQLResultSetList;
+
+class IGCSQLQuery
+{
+protected:
+	// call Destroy() instead of deleting this object directly
+	virtual ~IGCSQLQuery() {}
+
+public:
+	// returns the number of statements in the transaction 
+	// represented by this query object
+	virtual uint32 GetStatementCount() = 0;
+
+	// returns a string that represents where in the GC this
+	// query came from.  Usually this is FILE_AND_LINE.
+	virtual const char *PchName() = 0;
+
+	// get the null-terminated query string itself
+	virtual const char *PchCommand( uint32 unStatement ) = 0;
+
+	// gets the parameter data
+	virtual uint32 CnParams( uint32 unStatement ) = 0;
+	virtual EGCSQLType EParamType( uint32 unStatement, uint32 uIndex ) = 0;
+	virtual byte *PubParam( uint32 unStatement, uint32 uIndex ) = 0;
+	virtual uint32 CubParam( uint32 unStatement, uint32 uIndex ) = 0;
+	
+	// reports the result
+	virtual void SetResults( IGCSQLResultSetList *pResults ) = 0;
+};
+
+
+#endif // IGCSQLQUERY_H