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/*************** Colblk H Declares Source Code File (.H) ***************/
/* Name: COLBLK.H Version 1.7 */
/* */
/* (C) Copyright to the author Olivier BERTRAND 2005-2019 */
/* */
/* This file contains the COLBLK and derived classes declares. */
/***********************************************************************/
#ifndef __COLBLK__H
#define __COLBLK__H
/***********************************************************************/
/* Include required application header files */
/***********************************************************************/
#include "xobject.h"
#include "reldef.h"
/***********************************************************************/
/* Class COLBLK: Base class for table column descriptors. */
/***********************************************************************/
class DllExport COLBLK : public XOBJECT {
friend class TDBPIVOT;
protected:
// Default constructors used by derived classes
COLBLK(PCOLDEF cdp = NULL, PTDB tdbp = NULL, int i = 0);
COLBLK(PCOL colp, PTDB tdbp = NULL); // Used in copy process
COLBLK(int) {} // Used when changing a column class in TDBXML
public:
// Implementation
virtual int GetType(void) {return TYPE_COLBLK;}
virtual int GetResultType(void) {return Buf_Type;}
virtual int GetScale(void) {return Format.Prec;}
virtual int GetPrecision(void) {return Precision;}
virtual int GetLength(void) {return Long;}
virtual int GetLengthEx(void);
virtual int GetAmType() {return TYPE_AM_ERROR;}
virtual void SetOk(void) {Status |= BUF_EMPTY;}
virtual PTDB GetTo_Tdb(void) {return To_Tdb;}
virtual int GetClustered(void) {return 0;}
virtual int IsClustered(void) {return FALSE;}
virtual bool Stringify(void) {return FALSE;}
virtual PSZ GetJpath(PGLOBAL g, bool proj) {return NULL;}
PCOL GetNext(void) {return Next;}
PSZ GetName(void) {return Name;}
int GetIndex(void) {return Index;}
ushort GetColUse(void) {return ColUse;}
int GetOpt(void) {return Opt;}
ushort GetColUse(ushort u) {return (ColUse & u);}
ushort GetStatus(void) {return Status;}
ushort GetStatus(ushort u) {return (Status & u);}
void SetColUse(ushort u) {ColUse = u;}
void SetStatus(ushort u) {Status = u;}
void AddColUse(ushort u) {ColUse |= u;}
void AddStatus(ushort u) {Status |= u;}
void SetNext(PCOL cp) {Next = cp;}
PXCOL GetKcol(void) {return To_Kcol;}
void SetKcol(PXCOL kcp) {To_Kcol = kcp;}
PCOLDEF GetCdp(void) {return Cdp;}
PSZ GetDomain(void) {return (Cdp) ? Cdp->Decode : NULL;}
PSZ GetDesc(void) {return (Cdp) ? Cdp->Desc : NULL;}
PSZ GetFmt(void) {return (Cdp) ? Cdp->Fmt : NULL;}
bool IsUnsigned(void) {return Unsigned;}
bool IsVirtual(void) {return Cdp->IsVirtual();}
bool IsNullable(void) {return Nullable;}
void SetNullable(bool b) {Nullable = b;}
void SetName(PSZ name_var) { Name= name_var; }
// Methods
virtual void Reset(void);
virtual bool Compare(PXOB xp);
virtual bool SetFormat(PGLOBAL, FORMAT&);
virtual bool IsSpecial(void) {return false;}
virtual bool Eval(PGLOBAL g);
virtual bool SetBuffer(PGLOBAL g, PVAL value, bool ok, bool check);
virtual void SetTo_Val(PVAL) {}
virtual void ReadColumn(PGLOBAL g);
virtual void WriteColumn(PGLOBAL g);
virtual void Printf(PGLOBAL g, FILE *, uint);
virtual void Prints(PGLOBAL g, char *, uint);
virtual bool VarSize(void) {return false;}
bool InitValue(PGLOBAL g);
protected:
// Members
PCOL Next; // Next column in table
PSZ Name; // Column name
PCOLDEF Cdp; // To column definition block
PTDB To_Tdb; // Points to Table Descriptor Block
PXCOL To_Kcol; // Points to Xindex matching column
bool Nullable; // True if nullable
bool Unsigned; // True if unsigned
int Index; // Column number in table
int Opt; // Cluster/sort information
int Buf_Type; // Data type
int Long; // Internal length in table
int Precision; // Column length (as for ODBC)
int Freq; // Evaluated ceiling of distinct values
FORMAT Format; // Output format
ushort ColUse; // Column usage
ushort Status; // Column read status
}; // end of class COLBLK
/***********************************************************************/
/* Class SPCBLK: Base class for special column descriptors. */
/***********************************************************************/
class DllExport SPCBLK : public COLBLK {
public:
// Constructor
SPCBLK(PCOLUMN cp);
// Implementation
virtual int GetAmType(void) = 0;
virtual bool GetRnm(void) {return false;}
// Methods
virtual bool IsSpecial(void) {return true;}
virtual void ReadColumn(PGLOBAL g) = 0;
virtual void WriteColumn(PGLOBAL g);
protected:
// Default constructor not to be used
SPCBLK(void) : COLBLK(1) {}
}; // end of class SPCBLK
/***********************************************************************/
/* Class RIDBLK: ROWID special column descriptor. */
/***********************************************************************/
class DllExport RIDBLK : public SPCBLK {
public:
// Constructor
RIDBLK(PCOLUMN cp, bool rnm);
// Implementation
virtual int GetAmType(void) {return TYPE_AM_ROWID;}
virtual bool GetRnm(void) {return Rnm;}
// Methods
virtual void ReadColumn(PGLOBAL g);
protected:
bool Rnm; // False for RowID, True for RowNum
}; // end of class RIDBLK
/***********************************************************************/
/* Class FIDBLK: FILEID special column descriptor. */
/***********************************************************************/
class DllExport FIDBLK : public SPCBLK {
public:
// Constructor
FIDBLK(PCOLUMN cp, OPVAL op);
// Implementation
virtual int GetAmType(void) {return TYPE_AM_FILID;}
// Methods
virtual void Reset(void) {} // This is a pseudo constant column
virtual void ReadColumn(PGLOBAL g);
protected:
PCSZ Fn; // The current To_File of the table
OPVAL Op; // The file part operator
}; // end of class FIDBLK
/***********************************************************************/
/* Class TIDBLK: TABID special column descriptor. */
/***********************************************************************/
class DllExport TIDBLK : public SPCBLK {
public:
// Constructor
TIDBLK(PCOLUMN cp);
// Implementation
virtual int GetAmType(void) {return TYPE_AM_TABID;}
// Methods
virtual void Reset(void) {} // This is a pseudo constant column
virtual void ReadColumn(PGLOBAL g);
protected:
// Default constructor not to be used
TIDBLK(void) {}
// Members
PCSZ Tname; // The current table name
}; // end of class TIDBLK
/***********************************************************************/
/* Class PRTBLK: PARTID special column descriptor. */
/***********************************************************************/
class DllExport PRTBLK : public SPCBLK {
public:
// Constructor
PRTBLK(PCOLUMN cp);
// Implementation
virtual int GetAmType(void) {return TYPE_AM_PRTID;}
// Methods
virtual void Reset(void) {} // This is a pseudo constant column
virtual void ReadColumn(PGLOBAL g);
protected:
// Default constructor not to be used
PRTBLK(void) {}
// Members
PCSZ Pname; // The current partition name
}; // end of class PRTBLK
/***********************************************************************/
/* Class SIDBLK: SERVID special column descriptor. */
/***********************************************************************/
class DllExport SIDBLK : public SPCBLK {
public:
// Constructor
SIDBLK(PCOLUMN cp);
// Implementation
virtual int GetAmType(void) {return TYPE_AM_SRVID;}
// Methods
virtual void Reset(void) {} // This is a pseudo constant column
virtual void ReadColumn(PGLOBAL g);
protected:
// Default constructor not to be used
SIDBLK(void) {}
// Members
PCSZ Sname; // The current server name
}; // end of class SIDBLK
#endif // __COLBLK__H
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