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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/4.75 [en] (Win98; U) [Netscape]"> <meta name="KeyWords" content="OTL, Oracle, ODBC, DB2, CLI, database API, C++, Template Library"> <title>OTL 4.0, Example 560 (Describe otl_stream's bind variables forSybase SQL Server)</title></head><body><center><h1>OTL 4.0, Example 560 (Describe otl_stream's bind variables forSybase SQL Server)</h1></center>This example demonstrates a group of <a href="otl3_stream_class.htm#describe_vars">bindvariable describe</a> functions for Sybase SQL Server.<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>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<int>,:f2<char[31]>)", <br> // SQL statement<br> db // connect object<br> );<br> int i,j;<br> char tmp[32];<br><br> <a href="otl3_stream_class.htm#otl_var_desc">otl_var_desc</a>* vdesc;<br> int vdesc_len;<br><br> vdesc=o.<a href="otl3_stream_class.htm#describe_in_vars">describe_in_vars</a>(vdesc_len);<br> for(j=0;j<vdesc_len;++j){<br> cout<<"IN VAR =========================>"<<j<<endl;<br> cout<<"param_type="<<vdesc[j].param_type<<endl;<br> cout<<"ftype="<<vdesc[j].ftype<<endl;<br> cout<<"elem_size="<<vdesc[j].elem_size<<endl;<br> cout<<"array_size="<<vdesc[j].array_size<<endl;<br> cout<<"pos="<<vdesc[j].pos<<endl;<br> cout<<"name_pos="<<vdesc[j].name_pos<<endl;<br> cout<<"name="<<vdesc[j].name<<endl;<br> cout<<"pl_tab_flag="<<vdesc[j].pl_tab_flag<<endl;<br> }<br> cout<<endl<<"Inserting rows into table..."<<endl;<br> for(i=1;i<=5;++i){<br> sprintf(tmp,"Name%d",i);<br> cout<<"============= Inserting ========>"<<i<<endl;<br> vdesc=o.<a href="otl3_stream_class.htm#describe_next_in_var">describe_next_in_var</a>();<br> cout<<"ftype="<<vdesc->ftype<<", name="<<vdesc->name<<", f1="<<i<<endl;<br> o<<i;<br> vdesc=o.<a href="otl3_stream_class.htm#describe_next_in_var">describe_next_in_var</a>();<br> cout<<"ftype="<<vdesc->ftype<<", name="<<vdesc->name<<", f2="<<tmp<<endl;<br> o<<tmp;<br> }<br><br>}<br><br>void select()<br>{ <br> <a href="otl3_stream_class.htm">otl_stream</a> i(50, // buffer size<br> "select * from test_tab where f1>=:f<int> and f1<=:ff<int>*2",<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> int j;<br> int f1;<br> char f2[31];<br><br> <a href="otl3_stream_class.htm#otl_var_desc">otl_var_desc</a>* vdesc;<br> int vdesc_len;<br><br> vdesc=i.<a href="otl3_stream_class.htm#describe_in_vars">describe_in_vars</a>(vdesc_len);<br> for(j=0;j<vdesc_len;++j){<br> cout<<"IN VAR =========================>"<<j<<endl;<br> cout<<"param_type="<<vdesc[j].param_type<<endl;<br> cout<<"ftype="<<vdesc[j].ftype<<endl;<br> cout<<"elem_size="<<vdesc[j].elem_size<<endl;<br> cout<<"array_size="<<vdesc[j].array_size<<endl;<br> cout<<"pos="<<vdesc[j].pos<<endl;<br> cout<<"name_pos="<<vdesc[j].name_pos<<endl;<br> cout<<"name="<<vdesc[j].name<<endl;<br> cout<<"pl_tab_flag="<<vdesc[j].pl_tab_flag<<endl;<br> }<br><br> vdesc=i.<a href="otl3_stream_class.htm#describe_out_vars">describe_out_vars</a>(vdesc_len);<br> for(j=0;j<vdesc_len;++j){<br> cout<<"OUT VAR =========================>"<<j<<endl;<br> cout<<"param_type="<<vdesc[j].param_type<<endl;<br> cout<<"ftype="<<vdesc[j].ftype<<endl;<br> cout<<"elem_size="<<vdesc[j].elem_size<<endl;<br> cout<<"array_size="<<vdesc[j].array_size<<endl;<br> cout<<"pos="<<vdesc[j].pos<<endl;<br> cout<<"name_pos="<<vdesc[j].name_pos<<endl;<br> cout<<"name="<<vdesc[j].name<<endl;<br> cout<<"pl_tab_flag="<<vdesc[j].pl_tab_flag<<endl;<br> }<br><br> cout<<endl<<"Selecting rows from table..."<<endl;<br> i<<2<<2; // assigning :f = 4, :ff = 4<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> cout<<"======== Selecting a row ========>"<<endl;<br> vdesc=i.<a href="otl3_stream_class.htm#describe_next_out_var">describe_next_out_var</a>();<br> cout<<"ftype="<<vdesc->ftype<<", pos="<<vdesc->pos;<br> i>>f1;<br> cout<<", f1="<<f1<<endl;<br> vdesc=i.<a href="otl3_stream_class.htm#describe_next_out_var">describe_next_out_var</a>();<br> cout<<"ftype="<<vdesc->ftype<<", pos="<<vdesc->pos;<br> i>>f2;<br> cout<<", f2="<<f2<<endl;<br> }<br><br>}<br><br>int main()<br>{<br> <a href="otl3_connect_class.htm">otl_connect::otl_initialize</a>(); // initialize the database API environment<br> try{<br><br> db.rlogon("scott/tigger@freetds_sybsql"); // connect to the database<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 varchar(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.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 teh database<br><br> return 0;<br><br>}</pre><h2>Output</h2><pre>IN VAR =========================>0<br>param_type=0<br>ftype=4<br>elem_size=4<br>array_size=50<br>pos=0<br>name_pos=1<br>name=:f1<br>pl_tab_flag=0<br>IN VAR =========================>1<br>param_type=0<br>ftype=1<br>elem_size=31<br>array_size=50<br>pos=0<br>name_pos=2<br>name=:f2<br>pl_tab_flag=0<br><br>Inserting rows into table...<br>============= Inserting ========>1<br>ftype=4, name=:f1, f1=1<br>ftype=1, name=:f2, f2=Name1<br>============= Inserting ========>2<br>ftype=4, name=:f1, f1=2<br>ftype=1, name=:f2, f2=Name2<br>============= Inserting ========>3<br>ftype=4, name=:f1, f1=3<br>ftype=1, name=:f2, f2=Name3<br>============= Inserting ========>4<br>ftype=4, name=:f1, f1=4<br>ftype=1, name=:f2, f2=Name4<br>============= Inserting ========>5<br>ftype=4, name=:f1, f1=5<br>ftype=1, name=:f2, f2=Name5<br>IN VAR =========================>0<br>param_type=0<br>ftype=4<br>elem_size=4<br>array_size=1<br>pos=0<br>name_pos=1<br>name=:f<br>pl_tab_flag=0<br>IN VAR =========================>1<br>param_type=0<br>ftype=4<br>elem_size=4<br>array_size=1<br>pos=0<br>name_pos=2<br>name=:ff<br>pl_tab_flag=0<br>OUT VAR =========================>0<br>param_type=0<br>ftype=4<br>elem_size=4<br>array_size=50<br>pos=1<br>name_pos=0<br>name=f1<br>pl_tab_flag=0<br>OUT VAR =========================>1<br>param_type=0<br>ftype=1<br>elem_size=61<br>array_size=50<br>pos=2<br>name_pos=0<br>name=f2<br>pl_tab_flag=0<br><br>Selecting rows from table...<br>======== Selecting a row ========><br>ftype=4, pos=1, f1=2<br>ftype=1, pos=2, f2=Name2<br>======== Selecting a row ========><br>ftype=4, pos=1, f1=3<br>ftype=1, pos=2, f2=Name3<br>======== Selecting a row ========><br>ftype=4, pos=1, f1=4<br>ftype=1, pos=2, f2=Name4<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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