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Diff for /loncom/interface/lonmysql.pm between versions 1.24 and 1.37

version 1.24, 2004/08/20 01:27:05 version 1.37, 2007/04/11 22:37:17
Line 32  package Apache::lonmysql; Line 32  package Apache::lonmysql;
 use strict;  use strict;
 use DBI;  use DBI;
 use POSIX qw(strftime mktime);  use POSIX qw(strftime mktime);
   use Apache::lonnet;
   
 my $mysqluser;  my $mysqluser;
 my $mysqlpassword;  my $mysqlpassword;
   my $mysqldatabase;
   my %db_config;
   
 sub set_mysql_user_and_password {  sub set_mysql_user_and_password {
     # If we are running under Apache and LONCAPA, use the LON-CAPA       # If we are running under Apache and LONCAPA, use the LON-CAPA 
     # user and password.  Otherwise...? ? ? ?      # user and password.  Otherwise...? ? ? ?
     ($mysqluser,$mysqlpassword) = @_;      my ($input_mysqluser,$input_mysqlpassword,$input_mysqldatabase) = @_;
       if (! defined($mysqldatabase)) {
           $mysqldatabase = 'loncapa';
       }
       if (defined($input_mysqldatabase)) {
           $mysqldatabase = $input_mysqldatabase;
       }
     if (! defined($mysqluser) || ! defined($mysqlpassword)) {      if (! defined($mysqluser) || ! defined($mysqlpassword)) {
         if (! eval 'require Apache::lonnet();') {          if (! eval 'require Apache::lonnet();') {
             $mysqluser = 'www';              $mysqluser = 'www';
Line 49  sub set_mysql_user_and_password { Line 58  sub set_mysql_user_and_password {
             $mysqlpassword = '';              $mysqlpassword = '';
         }          }
     }      }
       if (defined($input_mysqluser)) {
           $mysqluser = $input_mysqluser;
       } 
       if (defined($input_mysqlpassword)) {
           $mysqlpassword = $input_mysqlpassword;
       }
 }  }
   
 ######################################################################  ######################################################################
Line 72  and provide a common interface.  The goa Line 87  and provide a common interface.  The goa
 a complete reimplementation of the DBI interface.  Instead we try to   a complete reimplementation of the DBI interface.  Instead we try to 
 make using mysql as painless as possible.  make using mysql as painless as possible.
   
 Each table has a numeric ID that is a parameter to most lonmysql functions.  Each table has a numeric ID that is a parameter to most lonmysql
 The table id is returned by &create_table.    functions.  The table id is returned by &create_table.  If you lose
 If you lose the table id, it is lost forever.  the table id, it is lost forever.  The table names in MySQL correspond
 The table names in MySQL correspond to   to $env{'user.name'}.'_'.$env{'user.domain'}.'_'.$table_id. (With all
 $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.$table_id.  If the table id   non-word characters removed form user.name and user.domain) If the
 is non-numeric, it is assumed to be the full name of a table.  If you pass  table id is non-numeric, it is assumed to be the full name of a table.
 the table id in a form, you MUST ensure that what you send to lonmysql is  If you pass the table id in a form, you MUST ensure that what you send
 numeric, otherwise you are opening up all the tables in the MySQL database.  to lonmysql is numeric, otherwise you are opening up all the tables in
   the MySQL database.
   
 =over 4  =over 4
   
Line 349  sub connect_to_db { Line 365  sub connect_to_db {
     if (! defined($mysqluser) || ! defined($mysqlpassword)) {      if (! defined($mysqluser) || ! defined($mysqlpassword)) {
         &set_mysql_user_and_password();          &set_mysql_user_and_password();
     }      }
     if (! ($dbh = DBI->connect("DBI:mysql:loncapa",$mysqluser,$mysqlpassword,      if (! ($dbh = DBI->connect("DBI:mysql:$mysqldatabase",$mysqluser,$mysqlpassword,
                                { RaiseError=>0,PrintError=>0}))) {                                 { RaiseError=>0,PrintError=>0}))) {
         $debugstring = "Unable to connect to loncapa database.";              $debugstring = "Unable to connect to loncapa database.";    
         if (! defined($dbh)) {          if (! defined($dbh)) {
Line 361  sub connect_to_db { Line 377  sub connect_to_db {
         return undef;          return undef;
     }      }
     $debugstring = "Successfully connected to loncapa database.";          $debugstring = "Successfully connected to loncapa database.";    
       # Determine DB configuration
       undef(%db_config);
       my $sth = $dbh->prepare("SHOW VARIABLES");
       $sth->execute();
       if ($sth->err()) {
           $debugstring = "Unable to retrieve db config variables";
           return undef;
       }
       foreach my $row (@{$sth->fetchall_arrayref}) {
           $db_config{$row->[0]} = $row->[1];
       }
       #&Apache::lonnet::logthis("MySQL configuration variables");
       #while (my ($k,$v) = each(%db_config)) {
       #    &Apache::lonnet::logthis("    '$k' => '$v'");
       #}
       #
     return 1;      return 1;
 }  }
   
Line 540  sub update_table_info { Line 572  sub update_table_info {
     #      #
     # Get MySQLs table status information.      # Get MySQLs table status information.
     #      #
     my @tabledesc = qw/  
         Name Type Row_format Rows Avg_row_length Data_length  
             Max_data_length Index_length Data_free Auto_increment   
                 Create_time Update_time Check_time Create_options Comment /;  
     my $db_command = "SHOW TABLE STATUS FROM loncapa LIKE '$tablename'";      my $db_command = "SHOW TABLE STATUS FROM loncapa LIKE '$tablename'";
     my $sth = $dbh->prepare($db_command);      my $sth = $dbh->prepare($db_command);
     $sth->execute();      $sth->execute();
Line 553  sub update_table_info { Line 581  sub update_table_info {
         &disconnect_from_db();          &disconnect_from_db();
         return undef;          return undef;
     }      }
       my @column_name = @{$sth->{NAME}};
     #      #
     my @info=$sth->fetchrow_array;      my @info=$sth->fetchrow_array;
     for (my $i=0;$i<= $#info ; $i++) {      for (my $i=0;$i<= $#info ; $i++) {
         $Tables{$tablename}->{$tabledesc[$i]}= $info[$i];          if ($column_name[$i] =~ /^(Create_|Update_|Check_)time$/) {
               $Tables{$tablename}->{$column_name[$i]}= 
                   &unsqltime($info[$i]);
           } else {
               $Tables{$tablename}->{$column_name[$i]}= $info[$i];
           }
     }      }
     #      #
     # Determine the column order      # Determine the column order
Line 580  sub update_table_info { Line 614  sub update_table_info {
     $debugstring = "Retrieved table info for $tablename";      $debugstring = "Retrieved table info for $tablename";
     return 1;      return 1;
 }  }
   
   ###############################
   
   =pod
   
   =item &table_information()
   
   Inputs: table id
   
   Returns: hash with the table status
   
   =cut
   
   ###############################
   sub table_information {
       my $table_id=shift;
       if (&update_table_info($table_id)) {
    return %{$Tables{$table_id}};
       } else {
    return ();
       }
   }
   
 ###############################  ###############################
   
 =pod  =pod
Line 592  Returns: array with column order Line 649  Returns: array with column order
   
 =cut  =cut
   
   ###############################
 sub col_order {  sub col_order {
     my $table_id=shift;      my $table_id=shift;
     if (&update_table_info($table_id)) {      if (&update_table_info($table_id)) {
Line 768  sub build_table_creation_request { Line 825  sub build_table_creation_request {
   
 =pod  =pod
   
   =item &get_table_prefix()
   
   returns the cleaned version of user.name and user.domain for us in table names
   
   =cut
   
   ###############################
   sub get_table_prefix {
       my $clean_name   = $env{'user.name'};
       my $clean_domain = $env{'user.domain'};
       $clean_name =~ s/\W//g;
       $clean_domain =~ s/\W//g;
       return $clean_name.'_'.$clean_domain.'_';
   }
   
   ###############################
   
   =pod
   
 =item &get_new_table_id()  =item &get_new_table_id()
   
 Used internally to prevent table name collisions.  Used internally to prevent table name collisions.
Line 778  Used internally to prevent table name co Line 854  Used internally to prevent table name co
 sub get_new_table_id {  sub get_new_table_id {
     my $newid = 0;      my $newid = 0;
     my @tables = &tables_in_db();      my @tables = &tables_in_db();
       my $prefix = &get_table_prefix();
     foreach (@tables) {      foreach (@tables) {
         if (/^$ENV{'user.name'}_$ENV{'user.domain'}_(\d+)$/) {          if (/^\Q$prefix\E(\d+)$/) {
             $newid = $1 if ($1 > $newid);              $newid = $1 if ($1 > $newid);
         }          }
     }      }
Line 935  sub bulk_store_rows { Line 1012  sub bulk_store_rows {
         $request .= '('.join(',',@$row).'),';          $request .= '('.join(',',@$row).'),';
     }      }
     $request =~ s/,$//;      $request =~ s/,$//;
       # $debugstring = "Executed ".$/.$request; # commented out - this is big
     $dbh->do($request);      $dbh->do($request);
     if ($dbh->err) {      if ($dbh->err) {
         $errorstring = 'Attempted '.$/.$request.$/.'Got error '.$dbh->errstr();          $errorstring = 'Attempted '.$/.$request.$/.'Got error '.$dbh->errstr();
Line 1057  sub translate_id { Line 1135  sub translate_id {
     # id should be a digit.  If it is not a digit we assume the given id      # id should be a digit.  If it is not a digit we assume the given id
     # is complete and does not need to be translated.      # is complete and does not need to be translated.
     return $id if ($id =~ /\D/);        return $id if ($id =~ /\D/);  
     return $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.$id;      return &get_table_prefix().$id;
 }  }
   
 ###########################################  ###########################################
Line 1154  sub drop_table { Line 1232  sub drop_table {
     return 1; # if we got here there was no error, so return a 'true' value      return 1; # if we got here there was no error, so return a 'true' value
 }  }
   
   ##########################################
   
   =pod
   
   =item fix_table_name 
   
   Fixes a table name so that it will work with MySQL.
   
   =cut
   
   ##########################################
   sub fix_table_name {
       my ($name) = @_;
       $name =~ s/^(\d+[eE]\d+)/_$1/;
       return $name;
   }
   
   
 # ---------------------------- convert 'time' format into a datetime sql format  # ---------------------------- convert 'time' format into a datetime sql format
Removed from v.1.24  
changed lines
  Added in v.1.37

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