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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD> <TITLE>OTL 4.0, Example 26 (TIMESTAMP_STRUCT and Oracle)</TITLE> <META NAME="Author" CONTENT="Sergei Kuchin"> <META NAME="GENERATOR" CONTENT="Mozilla/3.03Gold (Win95; I) [Netscape]"> <META NAME="KeyWords" CONTENT="OTL, Oracle, ODBC, DB2, CLI, database API, C++, Template Library"></HEAD><BODY><H1 ALIGN=CENTER>OTL 4.0, Example 26 (TIMESTAMP_STRUCT and Oracle)</H1><H1><A NAME="example1"></A>Example 26 (TIMESTAMP_STRUCT and Oracle)</H1><P>This example demonstrates simple INSERT and SELECT with Oracle DATEsand TIMESTAMP_STRUCTs.</P><H2>Source Code</H2><PRE>#include <iostream>using namespace std;#include <stdio.h></PRE><PRE>#define OTL_ODBC // Compile OTL 4.0/ODBC#include <otlv4.h> // include the OTL 4.0 header file<A HREF="otl3_connect_class.htm">otl_connect</A> db; // connect objectvoid insert(void)// insert rows into table{ otl_stream o(50, // buffer size "insert into test_tab2 values(:f1<float>,:f2<timestamp>)", // SQL statement db // connect object ); TIMESTAMP_STRUCT tm; for(int i=1;i<=10;++i){ tm.year=1998; tm.month=10; tm.day=19; tm.hour=23; tm.minute=12; tm.second=12; tm.fraction=0; o<<(float)i<<tm; }}void select(void){ otl_stream i(50, // buffer size "select * from test_tab2 where f2=:1<timestamp>", // SELECT statement db // connect object ); // create select stream int f1; TIMESTAMP_STRUCT tm,f2; tm.year=1998; tm.month=10; tm.day=19; tm.hour=23; tm.minute=12; tm.second=12; tm.fraction=0; i<<tm; // assigning :1 = tm // SELECT automatically executes when all input variables are // assigned. First portion of out rows is fetched to the buffer while(!i.eof()){ // while not end-of-data i>>f1>>f2; cout<<"f1="<<f1<<", f2="<<f2.month<<"/"<<f2.day<<"/" <<f2.year<<" "<<f2.hour<<":"<<f2.minute<<":" <<f2.second<<"."<<f2.fraction <<endl; } }</PRE><PRE>int main(){ <A HREF="otl3_connect_class.htm">otl_connect::otl_initialize</A>(); // initialize ODBC environment try{ db.rlogon("UID=scott;PWD=tiger;DSN=my_db"); // connect to ODBC <A HREF="otl3_const_sql.htm">otl_cursor::direct_exec</A> ( db, "drop table test_tab2", otl_exception::disabled // disable OTL exceptions ); // drop table <A HREF="otl3_const_sql.htm">otl_cursor::direct_exec</A> ( db, "create table test_tab2(f1 int, f2 date)" ); // create table insert(); // insert records into table select(); // select records from table } catch(<A HREF="otl3_exception_class.htm">otl_exception</A>& p){ // intercept OTL exceptions cerr<<p.msg<<endl; // print out error message cerr<<p.stm_text<<endl; // print out SQL that caused the error cerr<<p.sqlstate<<endl; // print out SQLSTATE message cerr<<p.var_info<<endl; // print out the variable that caused the error } db.logoff(); // disconnect from Oracle return 0;}</PRE><H2>Output</H2><PRE>f1=1, f2=10/19/1998 23:12:12.0f1=2, f2=10/19/1998 23:12:12.0f1=3, f2=10/19/1998 23:12:12.0f1=4, f2=10/19/1998 23:12:12.0f1=5, f2=10/19/1998 23:12:12.0f1=6, f2=10/19/1998 23:12:12.0f1=7, f2=10/19/1998 23:12:12.0f1=8, f2=10/19/1998 23:12:12.0f1=9, f2=10/19/1998 23:12:12.0f1=10, f2=10/19/1998 23:12:12.0<HR WIDTH="100%"></PRE><CENTER><P><A HREF="otl3_examples.htm">Examples</A> <A HREF="otl3.htm">Contents</A><A HREF="home.htm">Go Home</A> </P></CENTER><P>Copyright © 1996, 2008, Sergei Kuchin, email: <A HREF="mailto:skuchin@aceweb.com">skuchin@aceweb.com</A>,<A HREF="mailto:skuchin@gmail.com">skuchin@yahogmail</A><SCRIPT Language="JavaScript"><!-- hide from old browsers var modDate = new Date(document.lastModified) document.write("<i> Last Updated:</i> " + (modDate.getMonth()+1) + "/" + modDate.getDate() + "/" + "0"+(modDate.getYear())%100+"."); //--> </SCRIPT>.</P><P><I>Permission to use, copy, modify and redistribute this document forany purpose is hereby granted without fee, provided that the above copyrightnotice appear in all copies. </I></P><script type="text/javascript">var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));</script><script type="text/javascript">var pageTracker = _gat._getTracker("UA-5456201-1");pageTracker._trackPageview();</script></BODY></HTML>⌨️ 快捷键说明
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