Hi Ken,
Thanks a lot.
But this would require the key to be short. Will Check if this is acceptable
to all as we may not be able to port old db data if the key format is changed.
regards
ragha
******************************************************************************************
This email and its attachments contain confidential information from HUAWEI,
which is intended only for the person or entity whose address is listed above.
Any use of the information contained herein in any way (including, but not
limited to, total or partial disclosure, reproduction, or dissemination) by
persons other than the intended recipient(s) is prohibited. If you receive this
e-mail in error, please notify the sender by phone or email immediately and
delete it!
*****************************************************************************************
----- Original Message -----
From: Ken <[EMAIL PROTECTED]>
Date: Tuesday, July 3, 2007 0:46 am
Subject: Re: [sqlite] Re: In Mem Query Performance
> Timings:
>
> Calling Test Now
> TIME_ms=1210
> start=1183394494
> end=1183394496
>
> Calling Test Now
> TIME_ms=1164
> start=1183394504
> end=1183394505
>
> (time in Ms is 1.2 and 1.1 ... )
>
> Data generated using:
> #include <unistd.h>
> #include <iostream>
> #include <stdio.h>
> #include <fstream>
>
> using namespace std;
>
>
> int main()
> {
> fstream fout("data.sql",ios::out);
> fstream fout1("query.sql",ios::out);
> //Schema
> fout<<"create table test (name text not null, ser text not
> null,doid text,primary key (name, ser));"<<endl;
>
> for(int j=0; j<100000;j++)
> {
> char* key = tmpnam(0);
> string ser =
>
> ".111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111";
>
>
> fout1<<key<<endl;
> fout<<"insert into test values
> ('"<<key<<"','"<<ser<<"',"<<"'22222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222');"<<endl;
>
> }
>
> return 0;
> }
>
>
> ### Load data using:
> sqlite3 abc.db
> > pragma page_size=4096;
> > begin;
> > .read data.sql
> > commit;
>
> ============================= Performance code ==================
> //Compile:g++ -g main.cpp -I. -L. -lsqlite3 -lpthread
>
> #include <iostream>
> #include <fstream>
> #include <time.h>
> #include <list>
>
> #include <sys/timeb.h>
>
> #include <string>
> #include <unistd.h>
>
> #include "sqlite3.h"
>
> using namespace std;
>
> int main()
> {
> struct timeb startTime;
> struct timeb endTime;
> double ms;
>
>
> sqlite3* db;
> int ret = sqlite3_open("abc.db",&db);
>
> char* errmsg;
> char buf[1024];
>
> sprintf(buf,"create temporary table ttest as select * from
> test; ");
> ret = sqlite3_exec(db , buf, NULL ,NULL,&errmsg);
> if (ret != SQLITE_OK) {
> printf("failed to create temp table: %d\n", ret);
> exit(ret);
> }
>
> sprintf(buf,"create index tidx on ttest (name, ser);");
> ret = sqlite3_exec(db , buf, NULL ,NULL,&errmsg);
> if (ret != SQLITE_OK) {
> printf("failed to create index: %d\n", ret);
> exit(ret);
> }
>
>
> //read all the srvName from file and store it in arr and query.
> fstream fin("query.sql",ios::in);
> string data[100000];
>
> for(int j=0;!fin.eof();j++)
> {
> fin>>data[j];
> //cout<<data[j]<<endl;
> }
> fin.close();
>
> cout<<"Calling Test Now"<<endl;
> sleep(1);
>
> //Now Query Data.
> time_t start = time(0);
> ftime(&startTime);
>
>
>
> char* szError=0;
> const char* szTail=0;
> sqlite3_stmt* pVM;
>
> sprintf(buf,"select * from ttest where name = ?" );
> ret = sqlite3_prepare_v2(db, buf, -1, &pVM, &szTail);
> if (ret != SQLITE_OK) exit(ret);
>
> for(int k=0;k<100000;k++)
> {
> ret = sqlite3_bind_text(pVM, 1, data[k].c_str(),
> data[k].length(), SQLITE_STATIC);
> ret = sqlite3_step(pVM);
> ret = sqlite3_reset(pVM);
> }
>
>
>
> ret = sqlite3_finalize(pVM);
> ftime(&endTime);
> ms = (
> ((endTime.time - startTime.time) * 1000) +
> (endTime.millitm - startTime.millitm)
> ) ;
>
> cout<<"TIME_ms="<<ms<<endl;
>
> //
> time_t end = time(0);
> cout<<"start="<<start<<endl;
> cout<<"end="<<end<<endl;
>
> return 0;
> }
>
>
>
>
>
>
>
>
-----------------------------------------------------------------------------
To unsubscribe, send email to [EMAIL PROTECTED]
-----------------------------------------------------------------------------
