treeindex.mco

eXtremeDB数据库在Linux平台下的使用源码。内含多个示例程序

/****************************************************************
 *                                                              *
 * Copyright (c) 2001-2007 McObject LLC. All Right Reserved.    *
 *                                                              *
 ****************************************************************/

// This sample demonstrates operations with tree-indexes

#define uint4     unsigned<4>

declare database  randdb;

struct Vis
{
	float fValue;
	uint4 iRGB;
};

class Measurement
{
	uint4   iSeries;							  /* Series of measurement */
	uint4   iIdx;								  /* Index      */

	time    tTime;								  /* timestamp  */
	float   fValue1;							  /* value1     */
	float   fValue2;							  /* value2     */
	float   fDiff;								  /* difference */
	vector < Vis > vVis;						  /* Visualization */

	unique tree <iSeries, iIdx>  I_Index;		  /* unique complex index */
	tree <tTime>                I_Time;
	tree <fDiff>                I_Diff;
	tree <vVis.iRGB>            I_RGB;			  /* index on vector of structures */
};