core/sql/refresh/RuSimpleRefreshSQLComposer.h

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// Licensed to the Apache Software Foundation (ASF) under one
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#ifndef _RU_SQL_SIMPLE_REFRESH_COMPOSER_H_
#define _RU_SQL_SIMPLE_REFRESH_COMPOSER_H_

/* -*-C++-*-
******************************************************************************
*
* File:         RuSQLSimpleRefreshComposer.h
* Description:  Definition of class CRUSQLRefreshComposer
*				
*
* Created:      08/13/2000
* Language:     C++
* 
*
* 
******************************************************************************
*/


#include "RuRefreshSQLComposer.h"

//--------------------------------------------------------------------------//
//
// CRUSimpleRefreshSQLComposer
//
// This class composes the INTERNAL REFRESH command (both incremenetal and 
// recompute ) that is used with an audited  single transaction MV
// and unaudited MV. The class also composes the LOCK/UNLOCK TABLE statements 
// that are used in the unaudited executor.
//
//--------------------------------------------------------------------------//

class REFRESH_LIB_CLASS CRUSimpleRefreshSQLComposer : 
	  public CRURefreshSQLComposer {

public:
	CRUSimpleRefreshSQLComposer(CRURefreshTask *pTask);
	virtual ~CRUSimpleRefreshSQLComposer() {}

public:
	void ComposeRefresh();

	enum NoDeleteClause { REC_DELETE = FALSE , REC_NODELETE = TRUE };
	void ComposeRecompute(NoDeleteClause flag);
	
	void ComposeLock(const CDSString& name, BOOL exclusive);
	void ComposeUnLock(const CDSString& name);

private:
	//-- Prevent copying
	CRUSimpleRefreshSQLComposer(const CRUSimpleRefreshSQLComposer &other);
	CRUSimpleRefreshSQLComposer &operator = 
						(const CRUSimpleRefreshSQLComposer &other);

	void AddDeltaDefListClause();
};

#endif