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| author | Alexander Barkov <bar@mnogosearch.org> | 2013-01-18 19:21:44 +0400 |
|---|---|---|
| committer | Alexander Barkov <bar@mnogosearch.org> | 2013-01-18 19:21:44 +0400 |
| commit | d7143a4160d093abecf911de4084d5dd3aa3be92 (patch) | |
| tree | 4492cb6ec957a6decf98da85482c88fbe9b18465 /storage/connect/xobject.h | |
| parent | 055b62f404ee0a0463ee8ff98a0e24c083b95f1d (diff) | |
| download | mariadb-git-d7143a4160d093abecf911de4084d5dd3aa3be92.tar.gz | |
Adding the CONNECT storage engine sources.
Diffstat (limited to 'storage/connect/xobject.h')
| -rw-r--r-- | storage/connect/xobject.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/storage/connect/xobject.h b/storage/connect/xobject.h new file mode 100644 index 00000000000..c713d92249f --- /dev/null +++ b/storage/connect/xobject.h @@ -0,0 +1,136 @@ +/*************** Xobject H Declares Source Code File (.H) **************/
+/* Name: XOBJECT.H Version 2.3 */
+/* */
+/* (C) Copyright to the author Olivier BERTRAND 1998-2012 */
+/* */
+/* This file contains the XOBJECT and derived classes declares. */
+/***********************************************************************/
+
+#ifndef __XOBJECT__H
+#define __XOBJECT__H
+
+/***********************************************************************/
+/* Include required application header files */
+/* block.h is header containing Block global declarations. */
+/***********************************************************************/
+#include "block.h"
+#include "value.h"
+
+/***********************************************************************/
+/* Types used in some class definitions. */
+/***********************************************************************/
+typedef struct _tabdesc *PTABD; // For friend setting
+
+/***********************************************************************/
+/* The pointer to the one and only needed void object. */
+/***********************************************************************/
+extern PXOB const pXVOID;
+
+/***********************************************************************/
+/* Class XOBJECT is the base class for all classes that can be used */
+/* in evaluation operations: FILTER, EXPRESSION, SCALF, FNC, COLBLK, */
+/* SELECT, FILTER as well as all the constant object types. */
+/***********************************************************************/
+class DllExport XOBJECT : public BLOCK {
+ public:
+ XOBJECT(void) {Value = NULL; Constant = false;}
+
+ // Implementation
+ PVAL GetValue(void) {return Value;}
+ bool IsConstant(void) {return Constant;}
+ virtual int GetType(void) {return TYPE_XOBJECT;}
+ virtual int GetResultType(void) {return TYPE_VOID;}
+ virtual int GetKey(void) {return 0;}
+#if defined(_DEBUG)
+ virtual void SetKey(int k) {assert(false);}
+#else // !_DEBUG
+ virtual void SetKey(int k) {} // Only defined for COLBLK
+#endif // !_DEBUG
+ virtual int GetLength(void) = 0;
+ virtual int GetLengthEx(void) = 0;
+ virtual PSZ GetCharValue(void);
+ virtual short GetShortValue(void);
+ virtual int GetIntValue(void);
+ virtual double GetFloatValue(void);
+ virtual int GetPrecision(void) = 0;
+
+ // Methods
+ virtual void Reset(void) {}
+ virtual bool Compare(PXOB) = 0;
+ virtual bool Init(PGLOBAL) {return false;}
+ virtual bool Eval(PGLOBAL) {return false;}
+ virtual bool SetFormat(PGLOBAL, FORMAT&) = 0;
+ virtual int CheckColumn(PGLOBAL, PSQL, PXOB &, int &) {return 0;}
+ virtual int RefNum(PSQL) {return 0;}
+ virtual void AddTdb(PSQL, PTDB *, int&) {}
+ virtual PXOB SetSelect(PGLOBAL, PSQL, bool) {return this;}
+ virtual PXOB CheckSubQuery(PGLOBAL, PSQL) {return this;}
+ virtual bool CheckLocal(PTDB) {return true;}
+ virtual int CheckSpcCol(PTDB, int) {return 2;}
+ virtual bool CheckSort(PTDB) {return false;}
+ virtual bool VerifyColumn(PTBX txp) {return false;}
+ virtual bool VerifyTdb(PTDB& tdbp) {return false;}
+ virtual bool IsColInside(PCOL colp) {return false;}
+ virtual void MarkCol(ushort) {}
+
+ protected:
+ PVAL Value; // The current value of the object.
+ bool Constant; // true for an object having a constant value.
+ }; // end of class XOBJECT
+
+/***********************************************************************/
+/* Class XVOID: represent a void (null) object. */
+/* Used to represent a void parameter for count(*) or for a filter. */
+/***********************************************************************/
+class DllExport XVOID : public XOBJECT {
+ public:
+ XVOID(void) {Constant = true;}
+
+ // Implementation
+ virtual int GetType(void) {return TYPE_VOID;}
+ virtual int GetLength(void) {return 0;}
+ virtual int GetLengthEx(void) {return 0;}
+ virtual PSZ GetCharValue(void) {return NULL;}
+ virtual int GetIntValue(void) {return 0;}
+ virtual double GetFloatValue(void) {return 0.0;}
+ virtual int GetPrecision() {return 0;}
+
+ // Methods
+ virtual bool Compare(PXOB xp) {return xp->GetType() == TYPE_VOID;}
+ virtual bool SetFormat(PGLOBAL, FORMAT&) {return true;}
+ virtual int CheckSpcCol(PTDB, int) {return 0;}
+ }; // end of class XVOID
+
+
+/***********************************************************************/
+/* Class CONSTANT: represents a constant XOBJECT of any value type. */
+/* Note that the CONSTANT class is a friend of the VALUE class; */
+/***********************************************************************/
+class DllExport CONSTANT : public XOBJECT {
+ public:
+ CONSTANT(PGLOBAL g, void *value, short type);
+ CONSTANT(PGLOBAL g, int n);
+ CONSTANT(PVAL valp) {Value = valp; Constant = true;}
+
+ // Implementation
+ virtual int GetType(void) {return TYPE_CONST;}
+ virtual int GetResultType(void) {return Value->Type;}
+ virtual int GetLength(void) {return Value->GetValLen();}
+ virtual int GetPrecision() {return Value->GetValPrec();}
+ virtual int GetLengthEx(void);
+
+ // Methods
+ virtual bool Compare(PXOB xp);
+ virtual bool SetFormat(PGLOBAL g, FORMAT& fmt)
+ {return Value->SetConstFormat(g, fmt);}
+ virtual int CheckSpcCol(PTDB, int) {return 1;}
+ void Convert(PGLOBAL g, int newtype);
+ bool Rephrase(PGLOBAL g, PSZ work);
+ void SetValue(PVAL vp) {Value = vp;}
+ virtual bool VerifyColumn(PTBX txp) {return true;}
+ virtual bool VerifyTdb(PTDB& tdbp) {return true;}
+ virtual void Print(PGLOBAL g, FILE *, uint);
+ virtual void Print(PGLOBAL g, char *, uint);
+ }; // end of class CONSTANT
+
+#endif
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