version 1.14, 2003/06/02 16:44:01
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version 1.38, 2009/02/01 22:03:42
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Line 31 package Apache::lonmysql;
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Line 31 package Apache::lonmysql;
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use strict; |
use strict; |
use DBI; |
use DBI; |
use Apache::lonnet(); |
use POSIX qw(strftime mktime); |
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use Apache::lonnet; |
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my $mysqluser; |
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my $mysqlpassword; |
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my $mysqldatabase; |
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my %db_config; |
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sub set_mysql_user_and_password { |
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# If we are running under Apache and LONCAPA, use the LON-CAPA |
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# user and password. Otherwise...? ? ? ? |
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my ($input_mysqluser,$input_mysqlpassword,$input_mysqldatabase) = @_; |
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if (! defined($mysqldatabase)) { |
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$mysqldatabase = 'loncapa'; |
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} |
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if (defined($input_mysqldatabase)) { |
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$mysqldatabase = $input_mysqldatabase; |
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} |
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if (! defined($mysqluser) || ! defined($mysqlpassword)) { |
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if (! eval 'require Apache::lonnet();') { |
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$mysqluser = 'www'; |
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$mysqlpassword = $Apache::lonnet::perlvar{'lonSqlAccess'}; |
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} else { |
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$mysqluser = ''; |
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$mysqlpassword = ''; |
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} |
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} |
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if (defined($input_mysqluser)) { |
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$mysqluser = $input_mysqluser; |
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} |
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if (defined($input_mysqlpassword)) { |
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$mysqlpassword = $input_mysqlpassword; |
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} |
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} |
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###################################################################### |
###################################################################### |
###################################################################### |
###################################################################### |
Line 54 and provide a common interface. The goa
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Line 87 and provide a common interface. The goa
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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. |
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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'}.'_'.$table_id. If the table id |
non-word characters removed form user.name and user.domain) If the |
is non-numeric, it is assumed to be the full name of a table. If you pass |
table id is non-numeric, it is assumed to be the full name of a table. |
the table id in a form, you MUST ensure that what you send to lonmysql is |
If you pass the table id in a form, you MUST ensure that what you send |
numeric, otherwise you are opening up all the tables in the MySQL database. |
to lonmysql is numeric, otherwise you are opening up all the tables in |
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the MySQL database. |
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=over 4 |
=over 4 |
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Line 328 connection is established.
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Line 362 connection is established.
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############################### |
############################### |
sub connect_to_db { |
sub connect_to_db { |
return 1 if ($dbh); |
return 1 if ($dbh); |
if (! ($dbh = DBI->connect("DBI:mysql:loncapa","www", |
if (! defined($mysqluser) || ! defined($mysqlpassword)) { |
$Apache::lonnet::perlvar{'lonSqlAccess'}, |
&set_mysql_user_and_password(); |
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} |
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if (! ($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 341 sub connect_to_db {
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Line 377 sub connect_to_db {
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return undef; |
return undef; |
} |
} |
$debugstring = "Successfully connected to loncapa database."; |
$debugstring = "Successfully connected to loncapa database."; |
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# Determine DB configuration |
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undef(%db_config); |
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my $sth = $dbh->prepare("SHOW VARIABLES"); |
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$sth->execute(); |
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if ($sth->err()) { |
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$debugstring = "Unable to retrieve db config variables"; |
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return undef; |
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} |
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foreach my $row (@{$sth->fetchall_arrayref}) { |
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$db_config{$row->[0]} = $row->[1]; |
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} |
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#&Apache::lonnet::logthis("MySQL configuration variables"); |
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#while (my ($k,$v) = each(%db_config)) { |
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# &Apache::lonnet::logthis(" '$k' => '$v'"); |
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#} |
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# |
return 1; |
return 1; |
} |
} |
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Line 361 initialize anything in the lonmysql pack
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Line 413 initialize anything in the lonmysql pack
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############################### |
############################### |
sub verify_sql_connection { |
sub verify_sql_connection { |
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if (! defined($mysqluser) || ! defined($mysqlpassword)) { |
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&set_mysql_user_and_password(); |
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} |
my $connection; |
my $connection; |
if (! ($connection = DBI->connect("DBI:mysql:loncapa","www", |
if (! ($connection = DBI->connect("DBI:mysql:loncapa", |
$Apache::lonnet::perlvar{'lonSqlAccess'}, |
$mysqluser,$mysqlpassword, |
{ RaiseError=>0,PrintError=>0}))) { |
{ RaiseError=>0,PrintError=>0}))) { |
return 0; |
return 0; |
} |
} |
Line 517 sub update_table_info {
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Line 572 sub update_table_info {
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# |
# |
# Get MySQLs table status information. |
# Get MySQLs table status information. |
# |
# |
my @tabledesc = qw/ |
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Name Type Row_format Rows Avg_row_length Data_length |
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Max_data_length Index_length Data_free Auto_increment |
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Create_time Update_time Check_time Create_options Comment /; |
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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(); |
$sth->execute(); |
Line 530 sub update_table_info {
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Line 581 sub update_table_info {
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&disconnect_from_db(); |
&disconnect_from_db(); |
return undef; |
return undef; |
} |
} |
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my @column_name = @{$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$/) { |
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$Tables{$tablename}->{$column_name[$i]}= |
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&unsqltime($info[$i]); |
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} else { |
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$Tables{$tablename}->{$column_name[$i]}= $info[$i]; |
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} |
} |
} |
# |
# |
# Determine the column order |
# Determine the column order |
Line 562 sub update_table_info {
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Line 619 sub update_table_info {
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=pod |
=pod |
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=item &table_information() |
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Inputs: table id |
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Returns: hash with the table status |
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=cut |
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############################### |
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sub table_information { |
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my $table_id=shift; |
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if (&update_table_info($table_id)) { |
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return %{$Tables{$table_id}}; |
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} else { |
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return (); |
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} |
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} |
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############################### |
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=pod |
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=item &col_order() |
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Inputs: table id |
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Returns: array with column order |
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=cut |
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############################### |
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sub col_order { |
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my $table_id=shift; |
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if (&update_table_info($table_id)) { |
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return @{$Tables{$table_id}->{'Col_order'}}; |
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} else { |
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return (); |
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} |
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} |
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############################### |
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=pod |
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=item &create_table() |
=item &create_table() |
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Inputs: |
Inputs: |
table description |
table description, see &build_table_creation_request |
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Returns: |
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undef on error, table id on success. |
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=cut |
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############################### |
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sub create_table { |
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return undef if (!defined(&connect_to_db($dbh))); |
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my ($table_des)=@_; |
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my ($request,$table_id) = &build_table_creation_request($table_des); |
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# |
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# Execute the request to create the table |
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############################################# |
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my $count = $dbh->do($request); |
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if (! defined($count)) { |
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$errorstring = "$dbh ATTEMPTED:\n".$request."\nRESULTING ERROR:\n". |
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$dbh->errstr(); |
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return undef; |
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} |
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my $tablename = &translate_id($table_id); |
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delete($Tables{$tablename}) if (exists($Tables{$tablename})); |
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return undef if (! defined(&update_table_info($table_id))); |
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$debugstring = "Created table $tablename at time ".time. |
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" with request\n$request"; |
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return $table_id; |
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} |
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############################### |
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=pod |
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Input formats: |
=item build_table_creation_request |
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Input: table description |
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table description = { |
table description = { |
permanent => 'yes' or 'no', |
permanent => 'yes' or 'no', |
Line 599 Input formats:
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Line 732 Input formats:
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} |
} |
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Returns: |
Returns: scalar string containing mysql commands to create the table |
undef on error, table id on success. |
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=cut |
=cut |
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############################### |
############################### |
sub create_table { |
sub build_table_creation_request { |
return undef if (!defined(&connect_to_db($dbh))); |
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my ($table_des)=@_; |
my ($table_des)=@_; |
# |
# |
# Build request to create table |
# Build request to create table |
Line 687 sub create_table {
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Line 818 sub create_table {
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$request.="COMMENT = 'temporary' "; |
$request.="COMMENT = 'temporary' "; |
} |
} |
$request .= "TYPE=MYISAM"; |
$request .= "TYPE=MYISAM"; |
# |
return $request,$table_id; |
# Execute the request to create the table |
} |
############################################# |
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my $count = $dbh->do($request); |
############################### |
if (! defined($count)) { |
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$errorstring = "$dbh ATTEMPTED:\n".$request."\nRESULTING ERROR:\n"; |
=pod |
return undef; |
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} |
=item &get_table_prefix() |
# |
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# Set up the internal bookkeeping |
returns the cleaned version of user.name and user.domain for us in table names |
############################################# |
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delete($Tables{$tablename}) if (exists($Tables{$tablename})); |
=cut |
return undef if (! defined(&update_table_info($table_id))); |
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$debugstring = "Created table $tablename at time ".time. |
############################### |
" with request\n$request"; |
sub get_table_prefix { |
return $table_id; |
my $clean_name = $env{'user.name'}; |
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my $clean_domain = $env{'user.domain'}; |
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$clean_name =~ s/\W//g; |
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$clean_domain =~ s/\W//g; |
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return $clean_name.'_'.$clean_domain.'_'; |
} |
} |
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############################### |
############################### |
Line 719 Used internally to prevent table name co
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Line 854 Used internally to prevent table name co
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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(); |
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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 > $newid); |
} |
} |
} |
} |
Line 833 sub store_row {
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Line 969 sub store_row {
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return 1; |
return 1; |
} |
} |
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############################### |
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=pod |
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=item &bulk_store_rows() |
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Inputs: table id, [columns],[[row data1].[row data2],...] |
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returns undef on error, 1 on success. |
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=cut |
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############################### |
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sub bulk_store_rows { |
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my ($table_id,$columns,$rows) = @_; |
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# |
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return undef if (! defined(&connect_to_db())); |
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my $dbh = &get_dbh(); |
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return undef if (! defined($dbh)); |
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my $table_status = &check_table($table_id); |
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return undef if (! defined($table_status)); |
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if (! $table_status) { |
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$errorstring = "table $table_id does not exist."; |
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return undef; |
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} |
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# |
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my $tablename = &translate_id($table_id); |
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# |
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my $request = 'INSERT IGNORE INTO '.$tablename.' '; |
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if (defined($columns) && ref($columns) eq 'ARRAY') { |
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$request .= join(',',@$columns).' '; |
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} |
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if (! defined($rows) || ref($rows) ne 'ARRAY') { |
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$errorstring = "no input rows given."; |
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return undef; |
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} |
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$request .= 'VALUES '; |
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foreach my $row (@$rows) { |
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# avoid doing row stuff here... |
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$request .= '('.join(',',@$row).'),'; |
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} |
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$request =~ s/,$//; |
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# $debugstring = "Executed ".$/.$request; # commented out - this is big |
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$dbh->do($request); |
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if ($dbh->err) { |
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$errorstring = 'Attempted '.$/.$request.$/.'Got error '.$dbh->errstr(); |
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return undef; |
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} |
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return 1; |
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} |
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############################### |
############################### |
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=pod |
=pod |
Line 906 Returns undef on error.
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Line 1095 Returns undef on error.
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=cut |
=cut |
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########################################### |
########################################### |
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########## Show-Tables Cache |
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my $have_read_tables = 0; |
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my $dbh_sth; |
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########## |
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sub tables_in_db { |
sub tables_in_db { |
return undef if (!defined(&connect_to_db())); |
return undef if (!defined(&connect_to_db())); |
my $sth=$dbh->prepare('SHOW TABLES'); |
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$sth->execute(); |
########## Show-Tables Cache |
if ($sth->err) { |
if(!$have_read_tables) { |
$errorstring = "$dbh ATTEMPTED:\n".'SHOW TABLES'. |
$dbh_sth=$dbh->prepare('SHOW TABLES'); |
"\nRESULTING ERROR:\n".$sth->errstr; |
$have_read_tables = 1; |
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} |
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$dbh_sth->execute(); |
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#$dbh_sth->execute(); # Removed strange execute - from release 119 |
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########## |
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my $aref = $dbh_sth->fetchall_arrayref; |
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if ($dbh_sth->err()) { |
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$errorstring = |
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"$dbh ATTEMPTED:\n".'fetchall_arrayref after SHOW TABLES'. |
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"\nRESULTING ERROR:\n".$dbh_sth->errstr; |
return undef; |
return undef; |
} |
} |
my $aref = $sth->fetchall_arrayref; |
my @table_list; |
my @table_list=(); |
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foreach (@$aref) { |
foreach (@$aref) { |
push @table_list,$_->[0]; |
push(@table_list,$_->[0]); |
} |
} |
$debugstring = "Got list of tables in DB: @table_list"; |
$debugstring = "Got list of tables in DB: ".join(',',@table_list); |
return @table_list; |
return(@table_list); |
} |
} |
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########################################### |
########################################### |
Line 944 sub translate_id {
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Line 1148 sub translate_id {
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# 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; |
} |
} |
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########################################### |
########################################### |
Line 1000 sub remove_from_table {
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Line 1204 sub remove_from_table {
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return undef if (!defined(&connect_to_db())); |
return undef if (!defined(&connect_to_db())); |
# |
# |
$table_id = &translate_id($table_id); |
$table_id = &translate_id($table_id); |
my $command = 'DELETE FROM '.$table_id.' WHERE '.$dbh->quote($column). |
my $command = 'DELETE FROM '.$table_id.' WHERE '.$column. |
" LIKE BINARY ".$dbh->quote($value); |
" LIKE BINARY ".$dbh->quote($value); |
my $sth = $dbh->prepare($command); |
my $sth = $dbh->prepare($command); |
$sth->execute(); |
unless ($sth->execute()) { |
if ($sth->err) { |
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$errorstring = "ERROR on execution of ".$command."\n".$sth->errstr; |
$errorstring = "ERROR on execution of ".$command."\n".$sth->errstr; |
return undef; |
return undef; |
} |
} |
Line 1038 sub drop_table {
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Line 1241 sub drop_table {
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return undef; |
return undef; |
} |
} |
$debugstring = $command; |
$debugstring = $command; |
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delete($Tables{$table_id}); # remove any knowledge of the table |
return 1; # if we got here there was no error, so return a 'true' value |
return 1; # if we got here there was no error, so return a 'true' value |
} |
} |
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########################################## |
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=pod |
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=item fix_table_name |
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Fixes a table name so that it will work with MySQL. |
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=cut |
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########################################## |
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sub fix_table_name { |
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my ($name) = @_; |
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$name =~ s/^(\d+[eE]\d+)/_$1/; |
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return $name; |
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} |
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# ---------------------------- convert 'time' format into a datetime sql format |
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sub sqltime { |
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my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = |
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localtime(&unsqltime($_[0])); |
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$mon++; $year+=1900; |
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return "$year-$mon-$mday $hour:$min:$sec"; |
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} |
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sub maketime { |
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my %th=@_; |
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return POSIX::mktime(($th{'seconds'},$th{'minutes'},$th{'hours'}, |
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$th{'day'},$th{'month'}-1, |
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$th{'year'}-1900,0,0,$th{'dlsav'})); |
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} |
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######################################### |
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# |
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# Retro-fixing of un-backward-compatible time format |
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sub unsqltime { |
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my $timestamp=shift; |
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if ($timestamp=~/^(\d+)\-(\d+)\-(\d+)\s+(\d+)\:(\d+)\:(\d+)$/) { |
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$timestamp=&maketime('year'=>$1,'month'=>$2,'day'=>$3, |
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'hours'=>$4,'minutes'=>$5,'seconds'=>$6); |
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} |
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return $timestamp; |
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} |
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1; |
1; |
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__END__; |
__END__; |