--- loncom/interface/lonmysql.pm 2004/04/19 21:29:15 1.20
+++ loncom/interface/lonmysql.pm 2005/04/07 06:56:23 1.29
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# MySQL utility functions
#
-# $Id: lonmysql.pm,v 1.20 2004/04/19 21:29:15 matthew Exp $
+# $Id: lonmysql.pm,v 1.29 2005/04/07 06:56:23 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -31,9 +31,39 @@ package Apache::lonmysql;
use strict;
use DBI;
-use Apache::lonnet();
use POSIX qw(strftime mktime);
+use Apache::lonnet;
+my $mysqluser;
+my $mysqlpassword;
+my $mysqldatabase;
+
+sub set_mysql_user_and_password {
+ # If we are running under Apache and LONCAPA, use the LON-CAPA
+ # user and password. Otherwise...? ? ? ?
+ my ($input_mysqluser,$input_mysqlpassword,$input_mysqldatabase) = @_;
+ if (! defined($mysqldatabase)) {
+ $mysqldatabase = 'loncapa';
+ }
+ if (defined($input_mysqldatabase)) {
+ $mysqldatabase = $input_mysqldatabase;
+ }
+ if (! defined($mysqluser) || ! defined($mysqlpassword)) {
+ if (! eval 'require Apache::lonnet();') {
+ $mysqluser = 'www';
+ $mysqlpassword = $Apache::lonnet::perlvar{'lonSqlAccess'};
+ } else {
+ $mysqluser = '';
+ $mysqlpassword = '';
+ }
+ }
+ if (defined($input_mysqluser)) {
+ $mysqluser = $input_mysqluser;
+ }
+ if (defined($input_mysqlpassword)) {
+ $mysqlpassword = $input_mysqlpassword;
+ }
+}
######################################################################
######################################################################
@@ -60,7 +90,7 @@ Each table has a numeric ID that is a pa
The table id is returned by &create_table.
If you lose the table id, it is lost forever.
The table names in MySQL correspond to
-$ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.$table_id. If the table id
+$env{'user.name'}.'_'.$env{'user.domain'}.'_'.$table_id. If the table id
is non-numeric, it is assumed to be the full name of a table. If you pass
the table id in a form, you MUST ensure that what you send to lonmysql is
numeric, otherwise you are opening up all the tables in the MySQL database.
@@ -330,8 +360,10 @@ connection is established.
###############################
sub connect_to_db {
return 1 if ($dbh);
- if (! ($dbh = DBI->connect("DBI:mysql:loncapa","www",
- $Apache::lonnet::perlvar{'lonSqlAccess'},
+ if (! defined($mysqluser) || ! defined($mysqlpassword)) {
+ &set_mysql_user_and_password();
+ }
+ if (! ($dbh = DBI->connect("DBI:mysql:$mysqldatabase",$mysqluser,$mysqlpassword,
{ RaiseError=>0,PrintError=>0}))) {
$debugstring = "Unable to connect to loncapa database.";
if (! defined($dbh)) {
@@ -363,9 +395,12 @@ initialize anything in the lonmysql pack
###############################
sub verify_sql_connection {
+ if (! defined($mysqluser) || ! defined($mysqlpassword)) {
+ &set_mysql_user_and_password();
+ }
my $connection;
- if (! ($connection = DBI->connect("DBI:mysql:loncapa","www",
- $Apache::lonnet::perlvar{'lonSqlAccess'},
+ if (! ($connection = DBI->connect("DBI:mysql:loncapa",
+ $mysqluser,$mysqlpassword,
{ RaiseError=>0,PrintError=>0}))) {
return 0;
}
@@ -535,7 +570,12 @@ sub update_table_info {
#
my @info=$sth->fetchrow_array;
for (my $i=0;$i<= $#info ; $i++) {
- $Tables{$tablename}->{$tabledesc[$i]}= $info[$i];
+ if ($tabledesc[$i] !~ /^(Create_|Update_|Check_)time$/) {
+ $Tables{$tablename}->{$tabledesc[$i]}=
+ &unsqltime($info[$i]);
+ } else {
+ $Tables{$tablename}->{$tabledesc[$i]}= $info[$i];
+ }
}
#
# Determine the column order
@@ -559,6 +599,29 @@ sub update_table_info {
$debugstring = "Retrieved table info for $tablename";
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
@@ -571,7 +634,7 @@ Returns: array with column order
=cut
-
+###############################
sub col_order {
my $table_id=shift;
if (&update_table_info($table_id)) {
@@ -580,6 +643,7 @@ sub col_order {
return ();
}
}
+
###############################
=pod
@@ -587,9 +651,41 @@ sub col_order {
=item &create_table()
Inputs:
- table description
+ table description, see &build_table_creation_request
+Returns:
+ undef on error, table id on success.
+
+=cut
+
+###############################
+sub create_table {
+ return undef if (!defined(&connect_to_db($dbh)));
+ my ($table_des)=@_;
+ my ($request,$table_id) = &build_table_creation_request($table_des);
+ #
+ # Execute the request to create the table
+ #############################################
+ my $count = $dbh->do($request);
+ if (! defined($count)) {
+ $errorstring = "$dbh ATTEMPTED:\n".$request."\nRESULTING ERROR:\n".
+ $dbh->errstr();
+ return undef;
+ }
+ my $tablename = &translate_id($table_id);
+ delete($Tables{$tablename}) if (exists($Tables{$tablename}));
+ return undef if (! defined(&update_table_info($table_id)));
+ $debugstring = "Created table $tablename at time ".time.
+ " with request\n$request";
+ return $table_id;
+}
+
+###############################
+
+=pod
-Input formats:
+=item build_table_creation_request
+
+Input: table description
table description = {
permanent => 'yes' or 'no',
@@ -621,14 +717,12 @@ Input formats:
}
-Returns:
- undef on error, table id on success.
+Returns: scalar string containing mysql commands to create the table
=cut
###############################
-sub create_table {
- return undef if (!defined(&connect_to_db($dbh)));
+sub build_table_creation_request {
my ($table_des)=@_;
#
# Build request to create table
@@ -709,23 +803,7 @@ sub create_table {
$request.="COMMENT = 'temporary' ";
}
$request .= "TYPE=MYISAM";
- #
- # Execute the request to create the table
- #############################################
- my $count = $dbh->do($request);
- if (! defined($count)) {
- $errorstring = "$dbh ATTEMPTED:\n".$request."\nRESULTING ERROR:\n".
- $dbh->errstr();
- return undef;
- }
- #
- # Set up the internal bookkeeping
- #############################################
- delete($Tables{$tablename}) if (exists($Tables{$tablename}));
- return undef if (! defined(&update_table_info($table_id)));
- $debugstring = "Created table $tablename at time ".time.
- " with request\n$request";
- return $table_id;
+ return $request,$table_id;
}
###############################
@@ -743,7 +821,7 @@ sub get_new_table_id {
my $newid = 0;
my @tables = &tables_in_db();
foreach (@tables) {
- if (/^$ENV{'user.name'}_$ENV{'user.domain'}_(\d+)$/) {
+ if (/^$env{'user.name'}_$env{'user.domain'}_(\d+)$/) {
$newid = $1 if ($1 > $newid);
}
}
@@ -856,6 +934,58 @@ sub store_row {
return 1;
}
+
+###############################
+
+=pod
+
+=item &bulk_store_rows()
+
+Inputs: table id, [columns],[[row data1].[row data2],...]
+
+returns undef on error, 1 on success.
+
+=cut
+
+###############################
+sub bulk_store_rows {
+ my ($table_id,$columns,$rows) = @_;
+ #
+ return undef if (! defined(&connect_to_db()));
+ my $dbh = &get_dbh();
+ return undef if (! defined($dbh));
+ my $table_status = &check_table($table_id);
+ return undef if (! defined($table_status));
+ if (! $table_status) {
+ $errorstring = "table $table_id does not exist.";
+ return undef;
+ }
+ #
+ my $tablename = &translate_id($table_id);
+ #
+ my $request = 'INSERT IGNORE INTO '.$tablename.' ';
+ if (defined($columns) && ref($columns) eq 'ARRAY') {
+ $request .= join(',',@$columns).' ';
+ }
+ if (! defined($rows) || ref($rows) ne 'ARRAY') {
+ $errorstring = "no input rows given.";
+ return undef;
+ }
+ $request .= 'VALUES ';
+ foreach my $row (@$rows) {
+ # avoid doing row stuff here...
+ $request .= '('.join(',',@$row).'),';
+ }
+ $request =~ s/,$//;
+ $dbh->do($request);
+ if ($dbh->err) {
+ $errorstring = 'Attempted '.$/.$request.$/.'Got error '.$dbh->errstr();
+ return undef;
+ }
+ return 1;
+}
+
+
###############################
=pod
@@ -969,7 +1099,7 @@ sub translate_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.
return $id if ($id =~ /\D/);
- return $ENV{'user.name'}.'_'.$ENV{'user.domain'}.'_'.$id;
+ return $env{'user.name'}.'_'.$env{'user.domain'}.'_'.$id;
}
###########################################
@@ -1066,7 +1196,22 @@ sub drop_table {
return 1; # if we got here there was no error, so return a 'true' value
}
+##########################################
+=pod
+
+=item fix_table_name
+
+Fixes a table name so that it will work with MySQL.
+
+=cut
+
+##########################################
+sub fix_table_name {
+ my ($name) = @_;
+ $name =~ s/^(\d+[eE]\d+)/_$1/;
+ return $name;
+}
# ---------------------------- convert 'time' format into a datetime sql format