1 |
dpavlin |
10 |
# |
2 |
|
|
# this file implements index functions using DBI |
3 |
|
|
# |
4 |
|
|
|
5 |
|
|
package index_DBI; |
6 |
|
|
use strict qw(vars); |
7 |
|
|
use vars qw($Count); |
8 |
dpavlin |
12 |
use HTML::Entities; |
9 |
dpavlin |
10 |
|
10 |
|
|
use DBI; |
11 |
|
|
|
12 |
|
|
my %Table; # index tables which where visited in this run |
13 |
dpavlin |
45 |
my %sth_cache; # cache prepared statements |
14 |
dpavlin |
10 |
|
15 |
|
|
sub new { |
16 |
|
|
my $class = shift; |
17 |
|
|
my $self = {}; |
18 |
|
|
bless($self, $class); |
19 |
|
|
|
20 |
dpavlin |
50 |
my $dbd = shift || die "need dbi_dbd= in [global] section of configuration file"; |
21 |
|
|
my $dsn = shift || die "need dbi_dsn= in [global] section of configuration file"; |
22 |
|
|
my $user = shift || die "need dbi_user= in [global] section of configuration file"; |
23 |
|
|
my $passwd = shift || die "need dbi_passwd= in [global] section of configuration file"; |
24 |
|
|
|
25 |
|
|
$self->{dbh} = DBI->connect("DBI:$dbd:$dsn",$user,$passwd) || die $DBI::errstr; |
26 |
dpavlin |
10 |
# begin transaction |
27 |
|
|
$self->{dbh}->begin_work || die $self->{dbh}->errstr(); |
28 |
|
|
|
29 |
|
|
$Count++; |
30 |
|
|
|
31 |
|
|
return $self; |
32 |
|
|
} |
33 |
|
|
|
34 |
|
|
sub delete_and_create { |
35 |
|
|
my $self = shift; |
36 |
|
|
|
37 |
|
|
my $field = shift; |
38 |
|
|
|
39 |
dpavlin |
19 |
#print "#### delete_and_create($field)\n"; |
40 |
|
|
|
41 |
dpavlin |
10 |
$self->{dbh}->commit; |
42 |
|
|
|
43 |
|
|
my $sql = "select count(*) from $field"; |
44 |
|
|
my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr(); |
45 |
|
|
# FIX: this is not a good way to check if table exists! |
46 |
dpavlin |
18 |
if ($sth->execute() && $sth->fetchrow_hashref) { |
47 |
dpavlin |
10 |
my $sql = "drop table $field"; |
48 |
dpavlin |
19 |
$self->{dbh}->begin_work; |
49 |
dpavlin |
18 |
my $sth = $self->{dbh}->do($sql) || die "SQL: $sql ".$self->{dbh}->errstr(); |
50 |
dpavlin |
19 |
$self->{dbh}->commit; |
51 |
dpavlin |
10 |
} |
52 |
|
|
$sql = "create table $field ( |
53 |
|
|
item varchar(255), |
54 |
|
|
ident varchar(255), |
55 |
|
|
count int, |
56 |
dpavlin |
12 |
ord int, |
57 |
dpavlin |
10 |
primary key (item,ident) |
58 |
|
|
)"; |
59 |
dpavlin |
19 |
|
60 |
|
|
$self->{dbh}->begin_work; |
61 |
dpavlin |
18 |
$sth = $self->{dbh}->do($sql); # || warn "SQL: $sql ".$self->{dbh}->errstr(); |
62 |
dpavlin |
19 |
$self->{dbh}->commit; |
63 |
dpavlin |
10 |
|
64 |
|
|
$self->{dbh}->begin_work; |
65 |
|
|
} |
66 |
|
|
|
67 |
|
|
sub insert { |
68 |
|
|
my $self = shift; |
69 |
|
|
|
70 |
|
|
my $field = shift; |
71 |
dpavlin |
18 |
my $index_data = shift || print STDERR "\$index->insert($field,NULL,...)"; |
72 |
|
|
my $ident = shift || ''; # e.g. library id |
73 |
dpavlin |
10 |
|
74 |
|
|
if (! $index_data) { |
75 |
|
|
print STDERR "\$index->insert() -- no value to insert\n"; |
76 |
|
|
return; |
77 |
|
|
} |
78 |
|
|
|
79 |
|
|
if (! $Table{$field}) { |
80 |
|
|
$self->delete_and_create($field); |
81 |
dpavlin |
45 |
|
82 |
|
|
my $sql = "select item from $field where upper(item)=upper(?)"; |
83 |
|
|
$sth_cache{$field."select"} = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr(); |
84 |
|
|
|
85 |
|
|
$sql = "insert into $field (item,ident,count) values (?,?,?)"; |
86 |
|
|
$sth_cache{$field."insert"} = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr(); |
87 |
|
|
|
88 |
|
|
$sql = "update $field set count = count + 1 where item = ? and ident = ?"; |
89 |
|
|
$sth_cache{$field."update"} = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr(); |
90 |
dpavlin |
10 |
} |
91 |
|
|
$Table{$field}++; |
92 |
|
|
|
93 |
dpavlin |
45 |
$sth_cache{$field."select"}->execute($index_data) || die "cache: $field select; ".$self->{dbh}->errstr(); |
94 |
|
|
if (! $sth_cache{$field."select"}->fetchrow_hashref) { |
95 |
dpavlin |
28 |
$index_data = substr($index_data,0,255); |
96 |
dpavlin |
45 |
$sth_cache{$field."insert"}->execute($index_data,$ident,1) || die "cache: $field insert; ".$self->{dbh}->errstr(); |
97 |
dpavlin |
11 |
#print stderr "in index: $index_data\n"; |
98 |
dpavlin |
10 |
} else { |
99 |
dpavlin |
45 |
$sth_cache{$field."update"}->execute($index_data,$ident) || die "cache: $field update; ".$self->{dbh}->errstr(); |
100 |
dpavlin |
10 |
} |
101 |
|
|
} |
102 |
|
|
|
103 |
dpavlin |
11 |
sub check { |
104 |
|
|
my $self = shift; |
105 |
|
|
|
106 |
|
|
my $field = shift; |
107 |
|
|
|
108 |
|
|
my $sql = "select count(*) from $field"; |
109 |
dpavlin |
12 |
|
110 |
|
|
my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr(); |
111 |
|
|
$sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr(); |
112 |
|
|
|
113 |
|
|
my ($total) = $sth->fetchrow_array(); |
114 |
|
|
|
115 |
|
|
return $total; |
116 |
dpavlin |
11 |
} |
117 |
|
|
|
118 |
|
|
|
119 |
|
|
sub fetch { |
120 |
|
|
my $self = shift; |
121 |
|
|
|
122 |
|
|
my $field = shift; |
123 |
|
|
my $what = shift || 'item'; # 'item,ident' |
124 |
|
|
my $where = shift; |
125 |
|
|
|
126 |
dpavlin |
12 |
my $from_ord = shift || 0; |
127 |
|
|
my $rows = shift || 10; |
128 |
|
|
|
129 |
dpavlin |
11 |
my @sql_args; |
130 |
|
|
|
131 |
dpavlin |
13 |
my $sql = "select $what,ord from $field"; |
132 |
dpavlin |
12 |
|
133 |
dpavlin |
11 |
if ($where) { |
134 |
dpavlin |
12 |
my $sql2 = " select ord from $field where upper($what) like upper(?)||'%'"; |
135 |
|
|
my $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr(); |
136 |
|
|
|
137 |
|
|
$sth->execute($where) || die "sql2: $sql2; ".$self->{dbh}->errstr(); |
138 |
|
|
if (my $row = $sth->fetchrow_hashref) { |
139 |
dpavlin |
13 |
$from_ord += $row->{ord} - 1; |
140 |
dpavlin |
12 |
} |
141 |
dpavlin |
11 |
} |
142 |
dpavlin |
12 |
$sql .= " order by ord limit $rows offset $from_ord"; |
143 |
dpavlin |
11 |
|
144 |
dpavlin |
12 |
my $sth = $self->{dbh}->prepare($sql) || die "prepare: $sql; ".$self->{dbh}->errstr(); |
145 |
|
|
$sth->execute() || die "execute: $sql; ".$self->{dbh}->errstr(); |
146 |
dpavlin |
11 |
my @arr; |
147 |
|
|
while (my $row = $sth->fetchrow_hashref) { |
148 |
dpavlin |
37 |
$row->{item} = HTML::Entities::encode($row->{item},'<>&"'); |
149 |
dpavlin |
11 |
push @arr,$row; |
150 |
|
|
} |
151 |
|
|
return @arr; |
152 |
|
|
} |
153 |
|
|
|
154 |
dpavlin |
10 |
sub close { |
155 |
|
|
my $self = shift; |
156 |
|
|
|
157 |
dpavlin |
12 |
|
158 |
|
|
# re-create ord column (sorted order) in table |
159 |
|
|
sub create_ord { |
160 |
|
|
|
161 |
|
|
my $table = shift; |
162 |
|
|
|
163 |
|
|
$self->{dbh}->begin_work || die $self->{dbh}->errstr(); |
164 |
|
|
|
165 |
dpavlin |
28 |
my $sql = "select oid from $table order by upper(item)"; |
166 |
dpavlin |
12 |
my $sth = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr(); |
167 |
|
|
$sql = "update $table set ord=? where oid=?"; |
168 |
|
|
my $sth_update = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr(); |
169 |
|
|
$sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr(); |
170 |
|
|
my $ord = 1; |
171 |
|
|
while (my $row = $sth->fetchrow_hashref) { |
172 |
|
|
$sth_update->execute($ord++,$row->{oid}); |
173 |
|
|
} |
174 |
|
|
|
175 |
|
|
$self->{dbh}->commit || die $self->{dbh}->errstr(); |
176 |
|
|
} |
177 |
|
|
#--- end of sub |
178 |
|
|
|
179 |
dpavlin |
10 |
if ($self->{dbh}) { |
180 |
dpavlin |
12 |
|
181 |
|
|
# commit |
182 |
dpavlin |
10 |
$self->{dbh}->commit || die $self->{dbh}->errstr(); |
183 |
dpavlin |
12 |
|
184 |
|
|
foreach my $table (keys %Table) { |
185 |
|
|
# FIX |
186 |
|
|
print STDERR "creating ord for $table...\n"; |
187 |
|
|
create_ord($table); |
188 |
dpavlin |
50 |
undef $sth_cache{$table."select"}; |
189 |
|
|
undef $sth_cache{$table."insert"}; |
190 |
|
|
undef $sth_cache{$table."update"}; |
191 |
dpavlin |
12 |
} |
192 |
|
|
|
193 |
dpavlin |
10 |
$self->{dbh}->disconnect; |
194 |
|
|
undef $self->{dbh}; |
195 |
|
|
} |
196 |
|
|
} |
197 |
|
|
|
198 |
|
|
END { |
199 |
|
|
$Count--; |
200 |
dpavlin |
11 |
print STDERR "index_DBI fatal error: \$index->close() not called... $Count references left!\n" if ($Count > 0); |
201 |
dpavlin |
10 |
# FIX: debug output |
202 |
dpavlin |
11 |
# print STDERR "usage\ttable\n"; |
203 |
|
|
# foreach (keys %Table) { |
204 |
|
|
# print STDERR $Table{$_},"\t$_\n"; |
205 |
|
|
# } |
206 |
dpavlin |
10 |
} |
207 |
|
|
|
208 |
|
|
1; |