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## -------------------------------------------------------------------------------- |
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## $Id: libdb.pm,v 1.6 2002/11/29 04:53:39 joko Exp $ |
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## -------------------------------------------------------------------------------- |
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## $Log: libdb.pm,v $ |
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## Revision 1.6 2002/11/29 04:53:39 joko |
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## + hash2Sql now knows about SQL_SELECT |
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## |
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## Revision 1.5 2002/11/17 07:18:38 joko |
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## + small modification in hash2sql |
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## |
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## Revision 1.4 2002/10/16 22:36:42 joko |
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## + sub testDbServer |
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## |
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## Revision 1.3 2002/07/27 00:28:20 cvsjoko |
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## bugfixes |
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## |
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## Revision 1.2 2002/07/20 11:09:58 cvsjoko |
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## + bugfixes |
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## + dont' print sql-errors |
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## |
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## Revision 1.1 2002/07/19 18:14:03 cvsjoko |
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## no message |
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## |
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## |
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## -------------------------------------------------------------------------------- |
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|
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package libdb; |
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|
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use strict; |
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use warnings; |
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|
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require Exporter; |
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our @ISA = qw( Exporter ); |
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our @EXPORT_OK = qw( |
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testDsn hash2Sql |
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SQL_INSERT SQL_UPDATE |
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connectTarget disconnectTarget sendSql |
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dbNow |
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getDbNameByDsn sqlDbAction createSqlDb dropSqlDb |
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quotesql |
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testDsnForTables testDbServer |
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); |
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|
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|
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use libp qw( croak ); |
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use DBI; |
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|
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use constant SQL_INSERT => 10; |
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use constant SQL_UPDATE => 11; |
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use constant SQL_SELECT => 12; |
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|
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my $dbmeta_ref_cache; |
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|
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sub testDsn { |
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my $dsn = shift; |
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my $result; |
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if ( my $dbh = DBI->connect($dsn, '', '', { |
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PrintError => 0, |
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} ) ) { |
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$dbh->disconnect(); |
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return 1; |
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} |
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} |
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|
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sub testDbServer { |
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my $dsn = shift; |
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$dsn =~ s/database=(\w+)//; |
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|
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#print "testDbServer: $dsn", "\n"; |
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|
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my $result; |
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if ( my $dbh = DBI->connect($dsn, '', '', { |
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PrintError => 0, |
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} ) ) { |
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$dbh->disconnect(); |
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return 1; |
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} |
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} |
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|
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|
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# TODO: handle usage of "$crit" in an abstract way somehow |
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sub hash2Sql { |
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|
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my $table = shift; |
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my $hash = shift; |
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my $mode = shift; |
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my $crit = shift; |
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|
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my $sql; |
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$mode = SQL_SELECT if ($mode eq 'SQL_SELECT' || $mode eq 'SELECT'); |
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$mode = SQL_INSERT if ($mode eq 'SQL_INSERT' || $mode eq 'INSERT'); |
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$mode = SQL_UPDATE if ($mode eq 'SQL_UPDATE' || $mode eq 'UPDATE'); |
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|
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if ($mode == SQL_SELECT) { |
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$sql = "SELECT #fields# FROM $table WHERE $crit"; |
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} elsif ($mode == SQL_INSERT) { |
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$sql = "INSERT INTO $table (#fields#) VALUES (#values#)"; |
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} elsif ($mode == SQL_UPDATE) { |
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$sql = "UPDATE $table SET #fields-values# WHERE $crit"; |
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} |
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|
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my (@fields, @values); |
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foreach my $key (keys %{$hash}) { |
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push @fields, $key; |
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push @values, $hash->{$key}; |
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} |
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# quote each element |
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map { if (defined $_) { $_ = "'$_'" } else { $_ = "null" } } @values; |
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|
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my $fields = join(', ', @fields); |
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my $values = join(', ', @values); |
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my $fields_values = ''; |
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my $fc = 0; |
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foreach (@fields) { |
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$fields_values .= $_ . '=' . $values[$fc] . ', '; |
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$fc++; |
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} |
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$fields_values = substr($fields_values, 0, -2); |
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|
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$sql =~ s/#fields#/$fields/; |
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$sql =~ s/#values#/$values/; |
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$sql =~ s/#fields-values#/$fields_values/; |
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|
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return $sql; |
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} |
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|
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sub patch_dbmeta { |
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|
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my $dbmeta = shift; |
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|
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if ($dbmeta =~ m/^dbi:/) { |
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$dbmeta = { |
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dsn => $dbmeta, |
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trace_level => 0, |
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trace_file => undef, |
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}; |
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} |
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|
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return $dbmeta; |
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|
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} |
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|
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sub connectTarget { |
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my $dbmeta = shift; |
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croak "please supply a dsn or a \"dbmeta\"-hash" if (!$dbmeta); |
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$dbmeta = patch_dbmeta($dbmeta); |
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if (!$dbmeta->{connected}) { |
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if ($dbmeta->{dbh} = DBI->connect($dbmeta->{dsn}, '', '', { PrintError => 0 } )) { |
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$dbmeta->{dbh}->trace($dbmeta->{trace_level}, $dbmeta->{trace_file}); |
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$dbmeta->{dbh}->{PrintError} = 0; |
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$dbmeta->{connected} = 1; |
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$dbmeta_ref_cache = $dbmeta; |
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return 1; |
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} |
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} |
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} |
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|
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sub disconnectTarget { |
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#my $dbmeta = shift; |
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#croak "please supply a \"dbmeta\"-hash" if (!$dbmeta); |
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#$dbmeta = patch_dbmeta($dbmeta); |
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#$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect(); |
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my $dbmeta = $dbmeta_ref_cache; |
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$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect(); |
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undef($dbmeta->{dbh}); |
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#undef($dbmeta_ref_cache); |
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} |
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|
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sub sendSql { |
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my $sql = shift; |
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my $dbmeta_ref = shift; |
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if (!$dbmeta_ref) { |
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$dbmeta_ref = $dbmeta_ref_cache; |
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} |
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#print "sql: $sql", "\n"; |
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if (!$dbmeta_ref->{connected}) { |
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print "not connected!", "\n"; |
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return 0; |
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} |
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if (my $result = $dbmeta_ref->{dbh}->prepare($sql)) { |
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#if ($result->execute()) { |
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$result->execute(); |
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return $result; |
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#} |
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} |
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} |
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|
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sub dbNow { |
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#my $now_string = strftime "%a %b %e %H:%M:%S %Y", localtime; |
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my $now_string = strftime("%Y-%m-%d %H:%M:%S", localtime); |
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return $now_string; |
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} |
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|
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|
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sub getDbNameByDsn { |
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my $dsn = shift; |
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$dsn =~ m/database=(.+?);/; |
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my $database_name = $1; |
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return $database_name; |
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} |
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|
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sub sqlDbAction { |
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my $dsn = shift; |
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$dsn =~ s/database=.+?;//; |
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my $sql = shift; |
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my $dbmeta = { |
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dsn => $dsn, |
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trace_level => 1, |
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trace_file => 'dbitrace', |
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}; |
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my $bool_ok; |
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if (connectTarget($dbmeta)) { |
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sendSql($sql); |
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#print "state: ", $dbmeta->{dbh}->state, "\n"; |
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#print "err ", $dbmeta->{dbh}->err, "\n"; |
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#$bool_ok = ($dbmeta->{dbh} && $dbmeta->{dbh}->state && !$dbmeta->{dbh}->err); |
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$bool_ok = ($dbmeta->{dbh} && !$dbmeta->{dbh}->err); |
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disconnectTarget($dbmeta); |
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} |
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return $bool_ok; |
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} |
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|
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sub createSqlDb { |
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my $dsn = shift; |
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my $dbname = getDbNameByDsn($dsn); |
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print " - creating rdbms-database $dbname ($dsn) ..."; |
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my $sql; |
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$sql = "CREATE DATABASE $dbname;"; |
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if ( sqlDbAction($dsn, $sql) ) { |
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print "ok", "\n"; |
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return 1; |
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} else { |
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print "failed", "\n"; |
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return 0; |
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} |
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} |
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|
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sub dropSqlDb { |
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my $dsn = shift; |
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my $dbname = getDbNameByDsn($dsn); |
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print " - dropping database $dbname", "\n"; |
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my $sql; |
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$sql = "DROP DATABASE $dbname;"; |
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sqlDbAction($dsn, $sql); |
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} |
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|
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sub quotesql { |
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my $string = shift; |
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if ($string) { |
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$string =~ s/'/\\'/g; |
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} |
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return $string; |
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} |
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|
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sub testDsnForTables { |
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my $dsn = shift; |
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connectTarget($dsn); |
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my $result = sendSql('SHOW TABLES;'); |
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my $bool_tablesHere = $result->fetchrow_hashref(); |
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$result->finish(); |
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disconnectTarget($dsn); |
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return 1 if ($bool_tablesHere); |
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} |
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|
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