core/sql/refresh/RuRefreshSQLComposer.h

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#ifndef _RU_REFRESH_SQL_COMPOSER_H_
#define _RU_REFRESH_SQL_COMPOSER_H_

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

//--------------------------------------------------------------------------//
//	CRURefreshSQLComposer
//
//	This class composes the syntax of the INTERNAL REFRESH command 
//	for the given task. The SQL generation is based on universal 
//	building blocks to allow flexibility. These basic methods are used
//	in the derived composer classes.
//
//--------------------------------------------------------------------------//

#include "RuSQLComposer.h"
#include "RuRefreshTask.h"
#include "RuDeltaDef.h"
#include "RuForceOptions.h"

class REFRESH_LIB_CLASS CRURefreshSQLComposer : public CRUSQLComposer {
private:
	typedef CRUSQLComposer inherited;

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

public:
	void ComposeCntrlTableMDAMText(CRUForceOptions::MdamOptions mdamOption, 
							   const CDSString* pName=NULL);
	void ComposeResetCntrlTableMDAMText(const CDSString* pName=NULL);
	void ComposeDeleteContextLogTable();
	void ComposeControlQueryShape();
	void ComposeControlQueryShapeCut();
	void ComposeShowExplain();

protected:
	void StartInternalRefresh();
	void AddDeltaDefClause(const CRUDeltaDef *pDdef,
						   CDSString &fromEpoch,
						   CDSString &toEpoch);
	void AddPhaseParam();
	void AddPipeLineClause();
	void ComposeQueryShape();

	CDSString GetContextLogName() const;

	
protected:
	CRUMV& GetRootMV() const 
	{ 
		return *pRootMV_; 
	}

	CRURefreshTask &GetRefreshTask() const 
	{ 
		RUASSERT(NULL != pTask_);
		return *pTask_;
	}
	
private:
	//-- Prevent copying
	CRURefreshSQLComposer(const CRURefreshSQLComposer &other);
	CRURefreshSQLComposer &operator = (const CRURefreshSQLComposer &other);

private:
	void AddRngDeltaStatisticsClause(const CRUDeltaDef *pDdef);
	void AddIUDDeltaStatisticsClause(const CRUDeltaDef *pDdef);
	void AddUpdatedColumnsClause(const CRUUpdateBitmap *pUpdateBitmap);

private:
	CRURefreshTask *pTask_;
	CRUMV *pRootMV_;
};

#endif