📄 otl4_ex428.htm
字号:
<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en"><html><head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="Author" content="Sergei Kuchin"> <meta name="GENERATOR" content="Mozilla/4.77 [en] (Win95; U) [Netscape]"> <meta name="KeyWords" content="OTL, Oracle, ODBC, DB2, CLI, database API, C++, Template Library"> <title>OTL 4.0, Example 428</title></head><body><center><h1> OTL 4.0, Example 428 (OTL/ODBC, accessing the system datadictionary via ODBC functions, Sybase SQL Server)</h1></center>This example demonstrates how to access the database system datadictionary via ODBC functions, OTL/ODBC, Sybase SQL Server. In theory,anyODBC driver that implements the necessary ODBC functions can be usedwith OTL/ODBC.<h2> Source Code</h2><pre>#include <iostream><br>#include <stdio.h><br>using namespace std;<br><br>#define OTL_ODBC_UNIX // Compile OTL 4.0/ODBC<br>#include <otlv4.h> // include the OTL 4.0 header file<br><pre><br><a href="otl3_connect_class.htm">otl_connect</a> db; // connect object<br><br><br>void select()<br>{ <br> <a href="otl3_stream_class.htm">otl_stream</a> s;<br><br> s.set_all_column_types(otl_all_num2str|otl_all_date2str); <br> // map all numeric and date/time output columns to strings for simplicity.<br><br> s.open(100, // buffer size<br> "<tt>$SQLTables $1:'%' $2:'' $3:''</tt>",<br> // get a list of databases on the current connection's server.<br> db // connect object<br> ); <br><br> otl_column_desc* desc;<br> int desc_len;<br> desc=s.describe_select(desc_len); <br> // describe the structure of the output columns of the result set.<br><br> int rpc=0;<br> while(!s.eof()){<br> ++rpc;<br> char str[512];<br> cout<<"ROW#"<<rpc<<" ";<br> for(int col_num=0;col_num<desc_len;++col_num){<br> s>>str;<br> if(s.is_null())<br> cout<<desc[col_num].name<<"=NULL ";<br> else<br> cout<<desc[col_num].name<<"="<<str<<" ";<br> }<br> cout<<endl;<br> }<br><br>}<br><br>int main()<br>{<br> <a href="otl3_connect_class.htm">otl_connect::otl_initialize</a>(); // initialize ODBC environment<br> try{<br><br> db.rlogon("scott/tigger@sybsql"); // connect to ODBC<br><br> select(); // query the system data dictionary via ODBC functions.<br><br> }<br><br> catch(<a href="otl3_exception_class.htm">otl_exception</a>& p){ // intercept OTL exceptions<br> cerr<<p.msg<<endl; // print out error message<br> cerr<<p.stm_text<<endl; // print out SQL that caused the error<br> cerr<<p.sqlstate<<endl; // print out SQLSTATE message<br> cerr<<p.var_info<<endl; // print out the variable that caused the error<br> }<br><br> db.logoff(); // disconnect from ODBC<br><br> return 0;<br><br>}</pre><h2> Output</h2>ROW#1 TABLE_CAT=master TABLE_SCHEM=NULL TABLE_NAME=NULL TABLE_TYPE=Database REMARKS=NULL <br>ROW#2 TABLE_CAT=sybsql TABLE_SCHEM=NULL TABLE_NAME=NULL TABLE_TYPE=Database REMARKS=NULL <br>ROW#3 TABLE_CAT=sybsystemdb TABLE_SCHEM=NULL TABLE_NAME=NULL TABLE_TYPE=Database REMARKS=NULL <br>ROW#4 TABLE_CAT=sybsystemprocs TABLE_SCHEM=NULL TABLE_NAME=NULL TABLE_TYPE=Database REMARKS=NULL <br>ROW#5 TABLE_CAT=tempdb TABLE_SCHEM=NULL TABLE_NAME=NULL TABLE_TYPE=Database REMARKS=NULL <br><pre><hr width="100%"></pre><center><a href="otl3_examples.htm">Examples</a> <a href="otl3.htm">Contents</a><a href="home.htm">Go Home</a></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@gmail.com<bgmailript 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+".");
//--> </bgmailript></a>.</p><p><i>Permission to use, copy, modify and redistribute this document<br>for any purpose is hereby granted without fee, provided that the above<br>copyright notice appear in all copies.</i> </p></pre></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -