use strict;
use DBI;

	my $pc_csv_query_string = shift or die "usage perflogquery <queryString>";	
    my $pc_csv_file_name = "perfdata.csv";
	
	my $pc_csv_db_handle;
	my $pc_query_stmt_handle;
    
    $@ = "";
    eval{
            #Connect to CSV file or database if you will.
            $pc_csv_db_handle =
                    DBI->connect( "DBI:CSV:f_dir=.",
                                    {
                                        PrintError => 1,
                                        RaiseError => 1,
                                        AutoCommit => 0
                                    }
                                );
            
            #Turn on tracing with trace_level 2
            DBI->trace( 2, 'parse_csv_trace.log' );
            
            #We will be working with individual files for now. Maybe in the
            #future, we can move to using multiple files. Here we are binding
            #the perfmon table to a csv file.
            $pc_csv_db_handle -> {csv_tables} -> {perfmon} =
                            { 
								file => $pc_csv_file_name,
							};
            #$pc_csv_db_handle -> {raw_header} = 1; not much use even if we use raw_header.
            #Prepare statement for exection.
            $pc_query_stmt_handle =
                    $pc_csv_db_handle -> prepare("$pc_csv_query_string");
                    
            #Execute the statement
            $pc_query_stmt_handle -> execute();
            
            # Retrieve the returned rows of data.Need to work on this.
            while ( my @row = $pc_query_stmt_handle->fetchrow_array() ) {
                        print ("@row \n");
            }
            
            #Clean up
            $pc_query_stmt_handle -> finish(); $pc_csv_db_handle -> disconnect();
        };
    $@ and die "SQL database error: $@";