/*************** 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
int GetType(void ) override {return TYPE_COLBLK;}
int GetResultType(void ) override {return Buf_Type;}
int GetScale(void ) override {return Format.Prec;}
virtual int GetPrecision(void ) {return Precision;}
int GetLength(void ) override {return Long ;}
int GetLengthEx(void ) override;
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
void Reset(void ) override;
bool Compare(PXOB xp) override;
bool SetFormat(PGLOBAL, FORMAT&) override;
virtual bool IsSpecial(void ) {return false ;}
bool Eval(PGLOBAL g) override;
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);
void Printf(PGLOBAL g, FILE *, uint) override;
void Prints(PGLOBAL g, char *, uint) override;
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 bool GetRnm(void ) {return false ;}
// Methods
bool IsSpecial(void ) override {return true ;}
void ReadColumn(PGLOBAL g) override = 0 ;
void WriteColumn(PGLOBAL g) override;
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
int GetAmType(void ) override {return TYPE_AM_ROWID;}
bool GetRnm(void ) override {return Rnm;}
// Methods
void ReadColumn(PGLOBAL g) override;
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
int GetAmType(void ) override {return TYPE_AM_FILID;}
// Methods
void Reset(void ) override {} // This is a pseudo constant column
void ReadColumn(PGLOBAL g) override;
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
int GetAmType(void ) override {return TYPE_AM_TABID;}
// Methods
void Reset(void ) override {} // This is a pseudo constant column
void ReadColumn(PGLOBAL g) override;
protected :
// Default constructor not to be used
TIDBLK(void ) = default ;
// 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
int GetAmType(void ) override {return TYPE_AM_PRTID;}
// Methods
void Reset(void ) override {} // This is a pseudo constant column
void ReadColumn(PGLOBAL g) override;
protected :
// Default constructor not to be used
PRTBLK(void ) = default ;
// 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
int GetAmType(void ) override {return TYPE_AM_SRVID;}
// Methods
void Reset(void ) override {} // This is a pseudo constant column
void ReadColumn(PGLOBAL g) override;
protected :
// Default constructor not to be used
SIDBLK(void ) = default ;
// Members
PCSZ Sname; // The current server name
}; // end of class SIDBLK
#endif // __COLBLK__H
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