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<!DOCTYPE html 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 427</title></head><body><center><h1>OTL 4.0, Example 427 (OTL/ODBC, accessing the system datadictionary viaODBC functions, Sybase SQL Server)</h1></center>This example demonstrates how to access the database system datadictionaryvia ODBC functions, OTL/ODBC, Sybase SQL Server. In theory, any ODBCdriverthat implements the necessary ODBC functions can be used with OTL/ODBC.<h2>Source Code</h2><pre>#include <iostream><br>using namespace std;<br><br>#include <stdio.h></pre><pre>#define OTL_ODBC_UNIX // Compile OTL 4.0/ODBC<br>#include <otlv4.h> // include the OTL 4.0 header file<br><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> "$SQLTables",<br> // get a list of all tables in the current database<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><pre>ROW#1 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysalternates TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#2 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysattributes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#3 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=syscolumns TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#4 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=syscomments TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#5 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysconstraints TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#6 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysdepends TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#7 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysindexes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#8 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysjars TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#9 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=syskeys TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#10 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=syslogs TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#11 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysobjects TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#12 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=syspartitionkeys TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#13 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=syspartitions TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#14 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysprocedures TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#15 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysprotects TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#16 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysqueryplans TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#17 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysreferences TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#18 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysroles TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#19 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=syssegments TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#20 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysslices TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#21 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysstatistics TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#22 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=systabstats TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#23 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=systhresholds TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#24 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=systypes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#25 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysusermessages TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#26 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysusers TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#27 TABLE_CAT=sybsql TABLE_SCHEM=dbo TABLE_NAME=sysxtypes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#28 TABLE_CAT=sybsql TABLE_SCHEM=scott TABLE_NAME=test_tab TABLE_TYPE=TABLE REMARKS=NULL <br>ROW#29 TABLE_CAT=sybsql TABLE_SCHEM=scott TABLE_NAME=test_tab2 TABLE_TYPE=TABLE REMARKS=NULL<br><br><hr width="100%"></pre><center><a href="otl3_examples.htm">Examples</a> <a href="otl3.htm">Contents</a><a href="home.htm">GoHome</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<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></a>.</p><p><i>Permission to use, copy, modify and redistribute this documentforany purpose is hereby granted without fee, provided that the abovecopyrightnotice appear in all copies.</i></p></body></html>⌨️ 快捷键说明
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