OTL 4.0, Example 237 (OTL/ODBC, accessing the system data dictionary via ODBC functions, MS SQL Server)

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.

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>

#define OTL_ODBC_MSSQL_2008 // Compile OTL 4/ODBC, MS SQL 2008
//#define OTL_ODBC // Compile OTL 4/ODBC. Uncomment this when used with MS SQL 7.0/ 2000
#include <otlv4.h> // include the OTL 4.0 header file

otl_connect db; // connect object


void select()
{ 
 otl_stream s;

 s.set_all_column_types(otl_all_num2str|otl_all_date2str); 
    // map all numeric and date/time output columns to strings for simplicity.

 s.open(100, // buffer size
         "$SQLTables",
         // get a list of all tables in the current database
         db // connect object
        ); 

 otl_column_desc* desc;
 int desc_len;
 desc=s.describe_select(desc_len); 
    // describe the structure of the output columns of the result set.

 int rpc=0;
 while(!s.eof()){
   ++rpc;
   char str[512];
   cout<<"ROW#"<<rpc<<" ";
   for(int col_num=0;col_num<desc_len;++col_num){
     s>>str;
     if(s.is_null())
       cout<<desc[col_num].name<<"=NULL ";
     else
       cout<<desc[col_num].name<<"="<<str<<" ";
   }
   cout<<endl;
 }

}

int main()
{
 otl_connect::otl_initialize(); // initialize ODBC environment
 try{

  db.rlogon("scott/tiger@mssql2008"); // connect to ODBC

  select(); // query the system data dictionary via ODBC functions.

 }

 catch(otl_exception& p){ // intercept OTL exceptions
  cerr<<p.msg<<endl; // print out error message
  cerr<<p.stm_text<<endl; // print out SQL that caused the error
  cerr<<p.sqlstate<<endl; // print out SQLSTATE message
  cerr<<p.var_info<<endl; // print out the variable that caused the error
 }

 db.logoff(); // disconnect from ODBC

 return 0;

}

Output

ROW#1 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=syscolumns TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#2 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=syscomments TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#3 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysdepends TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#4 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfilegroups TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#5 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfiles TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#6 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfiles1 TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#7 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysforeignkeys TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#8 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfulltextcatalogs TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#9 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysfulltextnotify TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#10 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysindexes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#11 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysindexkeys TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#12 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysmembers TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#13 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysobjects TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#14 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=syspermissions TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#15 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysproperties TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#16 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysprotects TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#17 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysreferences TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#18 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=systypes TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#19 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysusers TABLE_TYPE=SYSTEM TABLE REMARKS=NULL 
ROW#20 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=dtproperties TABLE_TYPE=TABLE REMARKS=NULL 
ROW#21 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=dual TABLE_TYPE=TABLE REMARKS=NULL 
ROW#22 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=t1 TABLE_TYPE=TABLE REMARKS=NULL 
ROW#23 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=t2 TABLE_TYPE=TABLE REMARKS=NULL 
ROW#24 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=test_tab TABLE_TYPE=TABLE REMARKS=NULL 
ROW#25 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=test_tab2 TABLE_TYPE=TABLE REMARKS=NULL 
ROW#26 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=sysconstraints TABLE_TYPE=VIEW REMARKS=NULL 
ROW#27 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=syssegments TABLE_TYPE=VIEW REMARKS=NULL 
ROW#28 TABLE_CAT=DMS TABLE_SCHEM=dbo TABLE_NAME=vw1 TABLE_TYPE=VIEW REMARKS=NULL

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