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<title>OTL 4.0, Example 237</title>
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<h1>OTL 4.0, Example 237 (OTL/ODBC, accessing the system data
dictionary via
ODBC functions, MS SQL Server)</h1>
</center>
This example demonstrates how to access the database system data
dictionary
via ODBC functions, OTL/ODBC, MS SQL Server. In theory, any ODBC driver
that 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 <a href="otl3_compile.htm#OTL_ODBC_MSSQL_2008">OTL_ODBC_MSSQL_2008</a> // Compile OTL 4/ODBC, MS SQL 2008<br>//#define OTL_ODBC // Compile OTL 4/ODBC. Uncomment this when used with MS SQL 7.0/ 2000<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/tiger@mssql2008"); // 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=DMS TABLE_SCHEM=dbo TABLE_NAME=syscolumns TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#2 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=syscomments TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#3 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysdepends TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#4 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfilegroups TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#5 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfiles TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#6 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfiles1 TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#7 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysforeignkeys TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#8 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfulltextcatalogs TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#9 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfulltextnotify TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#10 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysindexes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#11 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysindexkeys TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#12 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysmembers TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#13 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysobjects TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#14 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=syspermissions TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#15 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysproperties TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#16 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysprotects TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#17 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysreferences TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#18 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=systypes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#19 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysusers TABLE_TYPE=SYSTEM TABLE REMARKS=NULL <br>ROW#20 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=dtproperties TABLE_TYPE=TABLE REMARKS=NULL <br>ROW#21 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=dual TABLE_TYPE=TABLE REMARKS=NULL <br>ROW#22 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=t1 TABLE_TYPE=TABLE REMARKS=NULL <br>ROW#23 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=t2 TABLE_TYPE=TABLE REMARKS=NULL <br>ROW#24 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=test_tab TABLE_TYPE=TABLE REMARKS=NULL <br>ROW#25 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=test_tab2 TABLE_TYPE=TABLE REMARKS=NULL <br>ROW#26 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysconstraints TABLE_TYPE=VIEW REMARKS=NULL <br>ROW#27 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=syssegments TABLE_TYPE=VIEW REMARKS=NULL <br>ROW#28 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=vw1 TABLE_TYPE=VIEW REMARKS=NULL <br><br><hr
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