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<title>OTL 4.0, Example 105 (OTL/ODBC and MS SQL Server's GUIDs)</title>
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<h1 align="center">OTL 4.0, Example 105 (OTL/ODBC and MS SQL Server's
GUIDs)</h1>
<h1>Example 105 (OTL/ODBC and MS SQL Server's GUIDs)</h1>
<p>This example demonstrates how OTL/ODBC works with MS SQL Server's
GUIDs.
Briefly, GUIDs get mapped to C++ null terminated strings on both input
and output. GUIDs are supported only by MS SQL Server 7.x and MS SQL
Server
2000.</p>
<h2>Source Code</h2>
<pre>#include <iostream><br>using namespace std;<br><br>#include <stdio.h></pre>
<pre>#define OTL_ODBC_MSSQL_2008 // Compile OTL 4.0/ODBC for MS SQL 2008<br>#define <a
href="otl3_compile.htm#OTL_MAP_SQL_GUID_TO_CHAR">OTL_MAP_SQL_GUID_TO_CHAR</a><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>void insert()<br>// insert rows into table<br>{ <br> <a
href="otl3_stream_class.htm">otl_stream</a> o(5, // buffer size<br> "insert into test_tab values(:f1<int>,newid())", <br> // SQL statement<br> db // connect object<br> );<br><br> for(int i=1;i<=13;++i)<br> o<<i;<br>}<br><br>void select()<br>{ <br> <a
href="otl3_stream_class.htm">otl_stream</a> i(5, // buffer size<br> "select * from test_tab",<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br><br> <a
href="otl3_stream_class.htm">otl_stream</a> o(7, // buffer size<br> "insert into test_tab2 values(:f1<int>,:f2<char[37]>)",<br> // INSERT statement<br> db // connect object<br> ); <br> // create insert stream<br> o.set_commit(0); // turnin off the otl_stream's autocommit flag<br> <br> int f1;<br> char f2[37];<br><br> while(!i.eof()){ // while not end-of-data<br> i>>f1>>f2;<br> cout<<"f1="<<f1<<", f2="<<f2<<endl;<br> o<<f1<<f2;<br> }<br><br> o.flush(); // flushing the otl_stream's buffer<br> db.commit(); // committing transaction<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("UID=scott;PWD=tiger;DSN=mssql2008"); // connect to ODBC<br><br> <a
href="otl3_const_sql.htm">otl_cursor::direct_exec<br></a> (<br> db,<br> "drop table test_tab",<br> otl_exception::disabled // disable OTL exceptions<br> ); // drop table<br><br> <a
href="otl3_const_sql.htm">otl_cursor::direct_exec<br></a> (<br> db,<br> "create table test_tab(f1 int, f2 uniqueidentifier)"<br> ); // create table<br><br> <a
href="otl3_const_sql.htm">otl_cursor::direct_exec<br></a> (<br> db,<br> "drop table test_tab2",<br> otl_exception::disabled // disable OTL exceptions<br> ); // drop table<br><br> <a
href="otl3_const_sql.htm">otl_cursor::direct_exec<br></a> (<br> db,<br> "create table test_tab2(f1 int, f2 uniqueidentifier)"<br> ); // create table<br><br><br> insert(); // insert records into table<br> select(); // select records from test_tab and insert them into test_tab2<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>}<br></pre>
<h2>Output</h2>
<pre>The actual GUID values will be different on each run of this example.</pre>
<pre>f1=1, f2=15B6CB56-F9CD-11D4-A633-86FF6E6A224E<br>f1=2, f2=15B6CB57-F9CD-11D4-A633-86FF6E6A224E<br>f1=3, f2=15B6CB58-F9CD-11D4-A633-86FF6E6A224E<br>f1=4, f2=15B6CB59-F9CD-11D4-A633-86FF6E6A224E<br>f1=5, f2=15B6CB5A-F9CD-11D4-A633-86FF6E6A224E<br>f1=6, f2=15B6CB5B-F9CD-11D4-A633-86FF6E6A224E<br>f1=7, f2=15B6CB5C-F9CD-11D4-A633-86FF6E6A224E<br>f1=8, f2=15B6CB5D-F9CD-11D4-A633-86FF6E6A224E<br>f1=9, f2=15B6CB5E-F9CD-11D4-A633-86FF6E6A224E<br>f1=10, f2=15B6CB5F-F9CD-11D4-A633-86FF6E6A224E<br>f1=11, f2=15B6CB60-F9CD-11D4-A633-86FF6E6A224E<br>f1=12, f2=15B6CB61-F9CD-11D4-A633-86FF6E6A224E<br>f1=13, f2=15B6CB62-F9CD-11D4-A633-86FF6E6A224E<br><br><br><hr
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<p>Copyright © 1996, 2008, Sergei Kuchin, email: <a
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