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<title>OTL 4.0, Example 258 (64-bit signed inregers, Oracle 8/8i/9i)</title>
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<h1 align="center">OTL 4.0, Example 258 (64-bit signed inregers, Oracle
8/8i/9i)</h1>
This example demonstrates a simple INSERT, SELECT, constant SQL
statements and <a href="otl3_compile.htm#OTL_BIGINT">bigint</a>'s with
the OCI8/8i/9i
<h2>Source Code</h2>
<pre>#include <iostream><br>using namespace std;<br><br>#include <stdio.h></pre>
<pre>#define <a href="otl3_compile.htm#OTL_ORA9i">OTL_ORA9I</a> // Compile OTL 4.0/OCI9i<br>// #define OTL_ORA8<br>// #define OTL_ORA8I<br><br>#if defined(_MSC_VER) // VC++<br><br>// Enabling support for 64-bit signed integers<br>// Since 64-bit integers are not part of the ANSI C++<br>// standard, this definition is compiler specific.<br>#define <a
href="otl3_compile.htm#OTL_BIGINT">OTL_BIGINT</a> __int64<br><br>// Defining a bigint constant that is larger than<br>// the max 32-bit integer value.<br>const OTL_BIGINT BIGINT_VAL1=12345678901234000;<br><br>// Defining a string-to-bigint conversion <br>// that is used by OTL internally.<br>// Since 64-bit ineteger conversion functions are<br>// not part of the ANSI C++ standard, the code<br>// below is compiler specific<br>#define <a
href="otl3_compile.htm#OTL_STR_TO_BIGINT">OTL_STR_TO_BIGINT</a>(str,n) \<br>{ \<br> n=_atoi64(str); \<br>}<br><br>// Defining a bigint-to-string conversion <br>// that is used by OTL internally.<br>// Since 64-bit ineteger conversion functions are<br>// not part of the ANSI C++ standard, the code<br>// below is compiler specific<br>#define <a
href="otl3_compile.htm#OTL_BIGINT_TO_STR">OTL_BIGINT_TO_STR</a>(n,str) \<br>{ \<br> _i64toa(n,str,10); \<br>}<br><br>#elif defined(__GNUC__) // GNU C++<br><br>#include <stdlib.h><br><br>// Enabling support for 64-bit signed integers<br>// Since 64-bit integers are not part of the ANSI C++<br>// standard, this definition is compiler specific.<br>#define <a
href="otl3_compile.htm#OTL_BIGINT">OTL_BIGINT</a> long long<br><br>const OTL_BIGINT BIGINT_VAL1=12345678901234000LL;<br><br>// Defining a string-to-bigint conversion <br>// that is used by OTL internally.<br>// Since 64-bit ineteger conversion functions are<br>// not part of the ANSI C++ standard, the code<br>// below is compiler specific.<br>#define <a
href="otl3_compile.htm#OTL_STR_TO_BIGINT">OTL_STR_TO_BIGINT</a>(str,n) \<br>{ \<br> n=strtoll(str,0,10); \<br>}<br><br>// Defining a bigint-to-string conversion <br>// that is used by OTL internally.<br>// Since 64-bit ineteger conversion functions are<br>// not part of the ANSI C++ standard, the code<br>// below is compiler specific<br>#define <a
href="otl3_compile.htm#OTL_BIGINT_TO_STR">OTL_BIGINT_TO_STR</a>(n,str) \<br>{ \<br> sprintf(str,"%lld",n); \<br>}<br><br><br>#endif<br><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(50, // buffer size<br> "insert into test_tab values(:f1<<a
href="otl3_bind_variables.htm#bigint">bigint</a>>,:f2<char[31]>)", <br> // SQL statement<br> db // connect object<br> );<br> char tmp[32];<br><br> for(OTL_BIGINT i=BIGINT_VAL1;i<=BIGINT_VAL1+100;++i){<br> int ndx=(int)(i-BIGINT_VAL1);<br> sprintf(tmp,"Name%d",ndx);<br> o<<i<<tmp;<br> }<br>}<br><br>void select()<br>{ <br> <a
href="otl3_stream_class.htm">otl_stream</a> i(50, // buffer size<br> "select f1 <a
href="otl3_bind_variables.htm#SELECT_OVERRIDE">:#1</a><<a
href="otl3_bind_variables.htm#bigint">bigint</a>>, f2 "<br> // the default mapping of f1 needs to be overriden <br> // <a
href="otl3_bind_variables.htm#SELECT_OVERRIDE">explicitly</a> when bigint's are used in a combination<br> // OTL/OCIx, because the default mapping maps<br> // Oracle NUMBERs into double containers, which are not <br> // big enough to hold 64-bit signed integer values.<br> "from test_tab "<br> "where f1>=:f<bigint> "<br> " and f1<=:ff<bigint>",<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> OTL_BIGINT f1;<br> char f2[31];<br>#if defined(_MSC_VER)<br> char f1str[40];<br>#endif<br><br> i<<BIGINT_VAL1+8<br> <<BIGINT_VAL1+16; // assigning :f = 8; :ff = 8<br> // SELECT automatically executes when all input variables are<br> // assigned. First portion of output rows is fetched to the buffer<br><br> while(!i.eof()){ // while not end-of-data<br> i>>f1>>f2;<br> cout<<"f1=";<br>#if defined(_MSC_VER)<br> _i64toa(f1,f1str,10);<br> cout<<f1str<<", f2="<<f2<<endl;<br>#elif defined(__GNUC__)<br> cout<<f1<<", f2="<<f2<<endl;<br>#endif<br> }<br><br>}<br><br>int main()<br>{<br> <a
href="otl3_connect_class.htm">otl_connect::otl_initialize</a>(); // initialize OCI environment<br> try{<br><br> db.rlogon("scott/tiger"); // connect to Oracle<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 number, f2 varchar2(30))"<br> ); // create table<br><br> insert(); // insert records into table<br> select(); // select records from table<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.var_info<<endl; // print out the variable that caused the error<br> }<br><br> db.logoff(); // disconnect from Oracle<br><br> return 0;<br><br>}<br></pre>
<h2>Output</h2>
<pre>f1=12345678901234008, f2=Name8<br>f1=12345678901234009, f2=Name9<br>f1=12345678901234010, f2=Name10<br>f1=12345678901234011, f2=Name11<br>f1=12345678901234012, f2=Name12<br>f1=12345678901234013, f2=Name13<br>f1=12345678901234014, f2=Name14<br>f1=12345678901234015, f2=Name15<br>f1=12345678901234016, f2=Name16<br><hr
width="100%"></pre>
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<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/a>.
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