persistentstorage/dbms/inc/D32SQL.H
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 15 Sep 2010 14:05:58 +0300
branchRCL_3
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Revision: 201036 Kit: 201036
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// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// SQL parsing engine
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// 
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//
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#ifndef __D32SQL_H__
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#define __D32SQL_H__
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#ifndef __D32DBMS_H__
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#include <d32dbms.h>
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#endif
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// Other class referenced
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class MStreamBuf;
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class TDbBlob;
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class RDbTableRow;
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class TTextOps;
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class TSqlParser;
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class CDbTable;
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class CDbTableDatabase;
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class CDbDataSource;
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class CDbBlobSpace;
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template <class T,class D> class HMatcherPattern;
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// Classes defined
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class Sql;
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class RSqlLiteral;
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class CSqlValues;
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class RSqlColumnList;
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class CSqlSearchCondition;
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class CSqlMultiNode;
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class CSqlBoundNode;
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class CSqlNullPredicate;
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class CSqlLiteralNode;
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class CSqlCompPredicate;
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class CSqlLikePredicate;
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class CSqlQuery;
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class CSqlDDLStatement;
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class CSqlDMLStatement;
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class CSqlInsertStatement;
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class CSqlModifyStatement;
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/**
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@internalComponent
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*/
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typedef HMatcherPattern<TUint8,TDesC8> HMatcherPattern8;
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typedef HMatcherPattern<TUint16,TDesC16> HMatcherPattern16;
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/**
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@internalComponent
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*/
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class Sql
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	{
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public:
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	enum TStatementType { ENone, EDDL, EDML };
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public:
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	static CSqlDDLStatement* ParseDDLStatementLC( const TDesC& aSql );
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	static CSqlDMLStatement* ParseDMLStatementLC( const TDesC& aSql );
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	static CSqlQuery* ParseQueryLC( const TDesC& aSql );
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	static CSqlSearchCondition* ParseSearchConditionLC( const TDesC& aSql );
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	//
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	static TStatementType Type( const TDesC& aSql );
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	};
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// variant data classes
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/**
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@internalComponent
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*/
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class RSqlLiteral
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	{
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public:
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	inline RSqlLiteral();
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	void Close();
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// assignment
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	inline void SetText( const TText* aPtr, const TText* aEnd );
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	inline TInt64& SetInt();
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	inline TReal64& SetReal();
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	inline TTime& SetTime();
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// conversions
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	void ToInt32L();
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	void ToUint32L();
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	void ToInt64L();
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	void ToReal32L();
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	void ToReal64L();
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	void ToTimeL();
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	void ToText8L();
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	void ToText16L();
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	void ToPattern8L(TBool aEscape = EFalse);
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	void ToPattern16L(TBool aEscape = EFalse);
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	TInt CopyText();
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// accessors
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	inline TBool IsNull() const;
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	inline TInt32 Int32() const;
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	inline TUint32 Uint32() const;
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	inline const TInt64& Int64() const;
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	inline const TTime& Time() const;
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	inline const TReal32& Real32() const;
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	inline const TReal64& Real64() const;
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	inline const TText* Ptr() const;
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	inline const TText* End() const;
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	inline const TPtrC DesC() const;
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	inline const HBufC8& Text8() const;
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	inline const HBufC16& Text16() const;
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	inline const HMatcherPattern8& Pattern8() const;
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	inline const HMatcherPattern16& Pattern16() const;
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private:
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	inline TBool IsBasic() const;
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	inline TBool IsAlloc() const;
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private:
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	enum TType { EInt32, EUint32, EReal32, EInt64, ETime, EReal64, EPtr, ENull, EBuf8, EBuf16, EPattern8, EPattern16 };
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private:
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	union
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		{
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		TInt32 iInt32;
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		TUint32 iUint32;
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		TUnion<TInt64> iInt64;
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		TReal32 iReal32;
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		TReal64 iReal64;
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		TUnion<TTime> iTime;
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		struct { const TText* iPtr; const TText* iEnd; } iPtr;
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		TAny* iAlloc;
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		} iVal;
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	TType iType;
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	HBufC* iBuffer;
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlValues) : public CBase
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	{
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public:
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	CSqlValues();
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	~CSqlValues();
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//
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	void AddL( const RSqlLiteral& aLiteral );
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	void BindL( const CDbDataSource& aSource );
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	void WriteL( CDbDataSource& aSource, CDbTable& aTable ) const;
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private:
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	enum { EGranularity = 8 };
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	class TEntry
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		{
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	public:
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		inline TEntry( const RSqlLiteral& aValue );
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	public:
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		RSqlLiteral iValue;
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		TDbColType iType;
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		};
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private:
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	RArray<TEntry> iValues;
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	};
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/**
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@internalComponent
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*/
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class RSqlColumnList : public RArray<TPtrC>
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	{
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	enum { EGranularity = 8 };
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public:
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	inline RSqlColumnList();
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	};
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// evaluation tree classes
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/**
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@internalComponent
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*/
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class CSqlSearchCondition : public CBase
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	{
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public:
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	enum TType
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		{
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		EAnd, EOr,
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		EIsNull, EIsNotNull,
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		ELike, ENotLike,
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		ELess, ELessEqual, EEqual, EGreaterEqual, EGreater, ENotEqual
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		};
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public:
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	TBool iIsEscape; 
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	inline TType NodeType() const;
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	inline CSqlMultiNode* MultiNode();
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	inline CSqlNullPredicate* NullPredicate();
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	inline CSqlCompPredicate* CompPredicate();
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	inline CSqlLikePredicate* LikePredicate();
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//
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	virtual void BindL( const RDbTableRow& aSource ) = 0;
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	virtual TBool EvaluateL( const TTextOps& aTextOp ) const = 0;
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protected:
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	CSqlSearchCondition( TType aType );
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private:
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	TType iType;
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlMultiNode) : public CSqlSearchCondition
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	{
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private:
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	typedef CSqlSearchCondition* TEntry;
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	enum { EGranularity = 4 * sizeof( TEntry ) };
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public:
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	static CSqlSearchCondition* New( TType aType, CSqlSearchCondition* aLeft, CSqlSearchCondition* aRight );
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//
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	inline TInt Count() const;
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	inline CSqlSearchCondition* SubNode( TInt aIndex ) const;
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	inline void SetSubNode( TInt aIndex, CSqlSearchCondition* aSearchCondition ); 
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	void Remove( CSqlSearchCondition* aSubNode );
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	static CSqlSearchCondition* Reduce( CSqlMultiNode* aNode );
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private:
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	inline CSqlMultiNode( TType aType );
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	~CSqlMultiNode();
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	static CSqlMultiNode* New( TType aType, TInt aSize );
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	static CSqlMultiNode* Grow( CSqlMultiNode* aNode, TInt aExtraSize );
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	static CSqlMultiNode* Concatenate( CSqlMultiNode* aLeft, CSqlMultiNode* aRight );
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//
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	inline TInt Size() const;
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	static inline TInt Size( TInt aLeaves );
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	inline TBool IsFull() const;
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private:
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// from CSqlSearchCondition
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	void BindL( const RDbTableRow& aSource );
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	TBool EvaluateL( const TTextOps& aTextOp ) const;
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private:
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	TEntry* iEnd;
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	TEntry iLeaves[1];
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlBoundNode) : public CSqlSearchCondition
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	{
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public:
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	const TDesC& ColumnName() const;
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	inline TDbColNo ColNo() const;
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	inline TDbColType ColType() const;
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protected:
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	CSqlBoundNode( TType aType, const TDesC& aColumn );
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	inline TBool IsBound() const;
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	inline TDbColumnC Column() const;
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	MStreamBuf& StreamLC( const TDbBlob& aBlob ) const;
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// from CSqlSearchCondition
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	void BindL( const RDbTableRow& aSource );
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private:
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	const RDbTableRow* iSource;
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	union
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		{
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		TUnion<TPtrC> iName;
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		struct
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			{
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			TDbColNo iNumber;
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			TDbColType iType;
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			} iBound;
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		} iColumn;
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlNullPredicate) : public CSqlBoundNode
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	{
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public:
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	CSqlNullPredicate( TType aType, const TDesC& aColumn );
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private:
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// from CSqlSearchCondition
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	TBool EvaluateL( const TTextOps& aTextOp ) const;
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlLiteralNode) : public CSqlBoundNode
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	{
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public:
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	inline const RSqlLiteral& Value() const;
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	inline RSqlLiteral& Value();
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protected:
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	CSqlLiteralNode( TType aType, const TDesC& aColumn, const RSqlLiteral& aLiteral );
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	~CSqlLiteralNode();
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// from CSqlSearchCondition
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	void BindL( const RDbTableRow& aSource );
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private:
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	RSqlLiteral iLiteral;
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlCompPredicate) : public CSqlLiteralNode
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	{
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public:
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	CSqlCompPredicate( TType aType, const TDesC& aColumn, const RSqlLiteral& aLiteral );
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private:
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	TInt CompareLongText8L( const TDbBlob& aBlob, const TTextOps& aTextOp ) const;
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	TInt CompareLongText16L( const TDbBlob& aBlob, const TTextOps& aTextOp ) const;
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// from CSqlSearchCondition
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	TBool EvaluateL( const TTextOps& aTextOp ) const;
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlLikePredicate) : public CSqlLiteralNode 
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	{
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public:
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	CSqlLikePredicate( TType aType, const TDesC& aColumn, const RSqlLiteral& aPattern );
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private:
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// from CSqlSearchCondition
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	void BindL( const RDbTableRow& aSource );
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	TBool EvaluateL( const TTextOps& aTextOp ) const;
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private:
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	TInt iMatchSize;
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	};
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/**
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@internalComponent
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*/
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NONSHARABLE_CLASS(CSqlQuery) : public CBase
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	{
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	friend class TSqlParser;
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public:
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	CSqlQuery();
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	~CSqlQuery();
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//
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	inline const TDesC& Table() const;
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   344
//
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   345
	inline TBool HasColumnList() const;
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   346
	inline const RSqlColumnList& ColumnList() const;
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   347
//
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   348
	inline TBool HasSearchCondition() const;
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   349
	inline CSqlSearchCondition& SearchCondition();
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   350
	void RemovePredicate( CSqlCompPredicate* aNode );
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   351
	inline CSqlSearchCondition* AdoptSearchCondition();
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   352
//
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   353
	inline TBool HasSortSpecification() const;
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   354
	inline CDbKey& SortSpecification();
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   355
private:
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   356
	CDbKey& SortSpecificationL();
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   357
private:
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   358
	TPtrC iTable;
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   359
	RSqlColumnList iColumns;
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   360
	CSqlSearchCondition* iSearchCondition;
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   361
	CDbKey* iSortSpecification;
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   362
	};
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   363
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   364
/**
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   365
@internalComponent
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   366
*/
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   367
class CSqlDDLStatement : public CBase
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   368
	{
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   369
protected:
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   370
	inline CSqlDDLStatement() {}
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   371
public:
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   372
	virtual CDbIncremental* ExecuteL( CDbDatabase& aDatabase, TDbTextComparison aComparison, TInt& aStep ) = 0;
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   373
	};
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   374
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   375
/**
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   376
@internalComponent
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   377
*/
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   378
NONSHARABLE_CLASS(CSqlDMLStatement) : public CBase
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   379
	{
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   380
	friend class TSqlParser;
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   381
public:
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   382
	~CSqlDMLStatement();
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   383
//
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   384
	inline CSqlQuery& Query();
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   385
	inline CSqlValues& Values();
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   386
	inline CSqlValues* AdoptValues();
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diff changeset
   387
//
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   388
	virtual CDbIncremental* ExecuteL( CDbTableDatabase& aDatabase, TDbTextComparison aComparison, TInt& aRows ) = 0;
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diff changeset
   389
protected:
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parents:
diff changeset
   390
	inline CSqlDMLStatement() {}
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parents:
diff changeset
   391
	inline TBool HasValues() const;
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parents:
diff changeset
   392
private:
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parents:
diff changeset
   393
	CSqlValues& ValuesL();
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parents:
diff changeset
   394
private:
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parents:
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   395
	CSqlQuery iQuery;
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parents:
diff changeset
   396
	CSqlValues* iValues;
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parents:
diff changeset
   397
	};
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parents:
diff changeset
   398
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parents:
diff changeset
   399
/**
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parents:
diff changeset
   400
@internalComponent
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parents:
diff changeset
   401
*/
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parents:
diff changeset
   402
NONSHARABLE_CLASS(CSqlInsertStatement) : public CSqlDMLStatement
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parents:
diff changeset
   403
	{
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parents:
diff changeset
   404
public:
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parents:
diff changeset
   405
	static CSqlInsertStatement* NewLC();
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parents:
diff changeset
   406
private:
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parents:
diff changeset
   407
	inline CSqlInsertStatement() {}
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parents:
diff changeset
   408
// from CSqlDMLStatement
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parents:
diff changeset
   409
	CDbIncremental* ExecuteL( CDbTableDatabase& aDatabase, TDbTextComparison aComparison, TInt& aRows );
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parents:
diff changeset
   410
	};
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parents:
diff changeset
   411
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parents:
diff changeset
   412
/**
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parents:
diff changeset
   413
@internalComponent
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parents:
diff changeset
   414
*/
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parents:
diff changeset
   415
NONSHARABLE_CLASS(CSqlModifyStatement) : public CSqlDMLStatement
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parents:
diff changeset
   416
	{
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parents:
diff changeset
   417
public:
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parents:
diff changeset
   418
	static CSqlModifyStatement* NewLC();
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parents:
diff changeset
   419
	inline TBool IsUpdate() const;
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parents:
diff changeset
   420
private:
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parents:
diff changeset
   421
	inline CSqlModifyStatement() {}
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parents:
diff changeset
   422
// from CSqlDMLStatement
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parents:
diff changeset
   423
	CDbIncremental* ExecuteL( CDbTableDatabase& aDatabase, TDbTextComparison aComparison, TInt& aRows );
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parents:
diff changeset
   424
	};
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parents:
diff changeset
   425
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parents:
diff changeset
   426
/**
08ec8eefde2f Revision: 201003
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parents:
diff changeset
   427
TSqlParser2 class uses TSqlParser class functionality only to parse particular SQL string
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parents:
diff changeset
   428
and extract SQL type and table name.
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parents:
diff changeset
   429
@internalComponent
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parents:
diff changeset
   430
*/
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parents:
diff changeset
   431
class TSqlParser2
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parents:
diff changeset
   432
	{
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parents:
diff changeset
   433
public:
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parents:
diff changeset
   434
	void ParseL(const TDesC& aSql);
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parents:
diff changeset
   435
	inline Sql::TStatementType StatementType() const;
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parents:
diff changeset
   436
	inline const TDesC& TableName() const;
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parents:
diff changeset
   437
08ec8eefde2f Revision: 201003
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parents:
diff changeset
   438
private:
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parents:
diff changeset
   439
	Sql::TStatementType	iStatementType;
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parents:
diff changeset
   440
	TPtrC				iTableName;
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parents:
diff changeset
   441
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parents:
diff changeset
   442
	};
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parents:
diff changeset
   443
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parents:
diff changeset
   444
#include "D32SQL.INL"
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parents:
diff changeset
   445
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parents:
diff changeset
   446
#endif//__D32SQL_H__