bzdbcopy.pl code style
parent
904055ea47
commit
cf849b33a7
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@ -1,5 +1,4 @@
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#!/usr/bin/perl -w
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#
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# The contents of this file are subject to the Mozilla Public
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# License Version 1.1 (the "License"); you may not use this file
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# except in compliance with the License. You may obtain a copy of
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@ -48,24 +47,26 @@ use constant TARGET_DB_HOST => 'localhost';
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# MAIN SCRIPT
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#####################################################################
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print "Connecting to the '" . SOURCE_DB_NAME . "' source database on "
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. SOURCE_DB_TYPE . "...\n";
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my $source_db = Bugzilla::DB::_connect(SOURCE_DB_TYPE, SOURCE_DB_HOST,
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SOURCE_DB_NAME, undef, undef, SOURCE_DB_USER, SOURCE_DB_PASSWORD);
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print "Connecting to the '" . SOURCE_DB_NAME . "' source database on " . SOURCE_DB_TYPE . "...\n";
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my $source_db = Bugzilla::DB::_connect(
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SOURCE_DB_TYPE, SOURCE_DB_HOST, SOURCE_DB_NAME,
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undef, undef, SOURCE_DB_USER, SOURCE_DB_PASSWORD
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);
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# Don't read entire tables into memory.
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if (SOURCE_DB_TYPE eq 'Mysql') {
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$source_db->{'mysql_use_result'}=1;
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if (SOURCE_DB_TYPE eq 'Mysql')
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{
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$source_db->{mysql_use_result} = 1;
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# MySQL cannot have two queries running at the same time. Ensure the schema
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# is loaded from the database so bz_column_info will not execute a query
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$source_db->_bz_real_schema;
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}
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print "Connecting to the '" . TARGET_DB_NAME . "' target database on "
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. TARGET_DB_TYPE . "...\n";
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my $target_db = Bugzilla::DB::_connect(TARGET_DB_TYPE, TARGET_DB_HOST,
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TARGET_DB_NAME, undef, undef, TARGET_DB_USER, TARGET_DB_PASSWORD);
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my $ident_char = $target_db->get_info( 29 ); # SQL_IDENTIFIER_QUOTE_CHAR
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print "Connecting to the '" . TARGET_DB_NAME . "' target database on " . TARGET_DB_TYPE . "...\n";
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my $target_db = Bugzilla::DB::_connect(
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TARGET_DB_TYPE, TARGET_DB_HOST, TARGET_DB_NAME,
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undef, undef, TARGET_DB_USER, TARGET_DB_PASSWORD
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);
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my $ident_char = $target_db->get_info(29); # SQL_IDENTIFIER_QUOTE_CHAR
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# We use the table list from the target DB, because if somebody
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# has customized their source DB, we still want the script to work,
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@ -75,7 +76,7 @@ my @table_list = $target_db->bz_table_list_real();
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# We don't want to copy over the bz_schema table's contents.
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my $bz_schema_location = lsearch(\@table_list, 'bz_schema');
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splice(@table_list, $bz_schema_location, 1) if $bz_schema_location > 0;
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splice @table_list, $bz_schema_location, 1 if $bz_schema_location > 0;
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# Instead of figuring out some fancy algorithm to insert data in the right
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# order and not break FK integrity, we just drop them all.
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@ -83,73 +84,76 @@ $target_db->bz_drop_foreign_keys();
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# We start a transaction on the target DB, which helps when we're doing
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# so many inserts.
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$target_db->bz_start_transaction();
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foreach my $table (@table_list) {
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foreach my $table (@table_list)
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{
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my @serial_cols;
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print "Reading data from the source '$table' table on "
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. SOURCE_DB_TYPE . "...\n";
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print "Reading data from the source '$table' table on " . SOURCE_DB_TYPE . "...\n";
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my @table_columns = $target_db->bz_table_columns_real($table);
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# The column names could be quoted using the quote identifier char
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# Remove these chars as different databases use different quote chars
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@table_columns = map { s/^\Q$ident_char\E?(.*?)\Q$ident_char\E?$/$1/; $_ }
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@table_columns;
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@table_columns = map { s/^\Q$ident_char\E?(.*?)\Q$ident_char\E?$/$1/; $_ } @table_columns;
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my ($total) = $source_db->selectrow_array("SELECT COUNT(*) FROM $table");
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my $select_query = "SELECT " . join(',', @table_columns) . " FROM $table";
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my $select_sth = $source_db->prepare($select_query);
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$select_sth->execute();
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my $insert_query = "INSERT INTO $table ( " . join(',', @table_columns)
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. " ) VALUES (";
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$insert_query .= '?,' foreach (@table_columns);
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my $insert_query = "INSERT INTO $table ( " . join(',', @table_columns) . " ) VALUES (";
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$insert_query .= '?,' foreach @table_columns;
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# Remove the last comma.
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chop($insert_query);
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$insert_query .= ")";
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my $insert_sth = $target_db->prepare($insert_query);
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print "Clearing out the target '$table' table on "
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. TARGET_DB_TYPE . "...\n";
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print "Clearing out the target '$table' table on " . TARGET_DB_TYPE . "...\n";
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$target_db->do("DELETE FROM $table");
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# Oracle doesn't like us manually inserting into tables that have
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# auto-increment PKs set, because of the way we made auto-increment
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# fields work.
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if ($target_db->isa('Bugzilla::DB::Oracle')) {
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foreach my $column (@table_columns) {
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if ($target_db->isa('Bugzilla::DB::Oracle'))
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{
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foreach my $column (@table_columns)
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{
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my $col_info = $source_db->bz_column_info($table, $column);
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if ($col_info && $col_info->{TYPE} =~ /SERIAL/i) {
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if ($col_info && $col_info->{TYPE} =~ /SERIAL/i)
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{
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print "Dropping the sequence + trigger on $table.$column...\n";
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$target_db->do("DROP TRIGGER ${table}_${column}_TR");
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$target_db->do("DROP SEQUENCE ${table}_${column}_SEQ");
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}
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}
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}
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print "Writing data to the target '$table' table on "
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. TARGET_DB_TYPE . "...\n";
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print "Writing data to the target '$table' table on " . TARGET_DB_TYPE . "...\n";
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my $count = 0;
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while (my $row = $select_sth->fetchrow_arrayref) {
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while (my $row = $select_sth->fetchrow_arrayref)
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{
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# Each column needs to be bound separately, because
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# many columns need to be dealt with specially.
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my $colnum = 0;
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foreach my $column (@table_columns) {
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foreach my $column (@table_columns)
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{
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# bind_param args start at 1, but arrays start at 0.
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my $param_num = $colnum + 1;
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my $already_bound;
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# Certain types of columns need special handling.
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my $col_info = $source_db->bz_column_info($table, $column);
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if ($col_info && $col_info->{TYPE} eq 'LONGBLOB') {
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$insert_sth->bind_param($param_num,
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$row->[$colnum], $target_db->BLOB_TYPE);
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if ($col_info && $col_info->{TYPE} eq 'LONGBLOB')
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{
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$insert_sth->bind_param($param_num, $row->[$colnum], $target_db->BLOB_TYPE);
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$already_bound = 1;
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}
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elsif ($col_info && $col_info->{TYPE} =~ /decimal/) {
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elsif ($col_info && $col_info->{TYPE} =~ /decimal/)
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{
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# In MySQL, decimal cols can be too long.
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my $col_type = $col_info->{TYPE};
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$col_type =~ /decimal\((\d+),(\d+)\)/;
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my ($precision, $decimals) = ($1, $2);
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# If it's longer than precision + decimal point
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if ( length($row->[$colnum]) > ($precision + 1) ) {
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if (length $row->[$colnum] > $precision + 1)
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{
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# Truncate it to the highest allowed value.
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my $orig_value = $row->[$colnum];
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$row->[$colnum] = '';
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@ -157,19 +161,20 @@ foreach my $table (@table_list) {
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$row->[$colnum] .= '9' while ($non_decimal--);
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$row->[$colnum] .= '.';
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$row->[$colnum] .= '9' while ($decimals--);
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print "Truncated value $orig_value to " . $row->[$colnum]
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. " for $table.$column.\n";
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print "Truncated value $orig_value to " . $row->[$colnum] . " for $table.$column.\n";
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}
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}
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elsif ($col_info && $col_info->{TYPE} =~ /DATETIME/i) {
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elsif ($col_info && $col_info->{TYPE} =~ /DATETIME/i)
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{
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my $date = $row->[$colnum];
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# MySQL can have strange invalid values for Datetimes.
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$row->[$colnum] = '1901-01-01 00:00:00'
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if $date && $date eq '0000-00-00 00:00:00';
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if ($date && $date eq '0000-00-00 00:00:00')
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{
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$row->[$colnum] = '1901-01-01 00:00:00';
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}
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}
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$insert_sth->bind_param($param_num, $row->[$colnum])
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unless $already_bound;
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$insert_sth->bind_param($param_num, $row->[$colnum]) unless $already_bound;
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$colnum++;
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}
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@ -179,31 +184,32 @@ foreach my $table (@table_list) {
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}
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# For some DBs, we have to do clever things with auto-increment fields.
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foreach my $column (@table_columns) {
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foreach my $column (@table_columns)
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{
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next if $target_db->isa('Bugzilla::DB::Mysql');
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my $col_info = $source_db->bz_column_info($table, $column);
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if ($col_info && $col_info->{TYPE} =~ /SERIAL/i) {
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my ($max_val) = $target_db->selectrow_array(
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"SELECT MAX($column) FROM $table");
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if ($col_info && $col_info->{TYPE} =~ /SERIAL/i)
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{
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my ($max_val) = $target_db->selectrow_array("SELECT MAX($column) FROM $table");
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# Set the sequence to the current max value + 1.
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$max_val = 0 if !defined $max_val;
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$max_val++;
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print "\nSetting the next value for $table.$column to $max_val.";
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if ($target_db->isa('Bugzilla::DB::Pg')) {
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if ($target_db->isa('Bugzilla::DB::Pg'))
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{
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# PostgreSQL doesn't like it when you insert values into
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# a serial field; it doesn't increment the counter
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# automatically.
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# a serial field; it doesn't increment the counter automatically.
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$target_db->bz_set_next_serial_value($table, $column);
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}
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elsif ($target_db->isa('Bugzilla::DB::Oracle')) {
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elsif ($target_db->isa('Bugzilla::DB::Oracle'))
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{
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# Oracle increments the counter on every insert, and *always*
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# sets the field, even if you gave it a value. So if there
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# were already rows in the target DB (like the default rows
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# created by checksetup), you'll get crazy values in your
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# id columns. So we just dropped the sequences above and
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# we re-create them here, starting with the right number.
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my @sql = $target_db->_bz_real_schema->_get_create_seq_ddl(
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$table, $column, $max_val);
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my @sql = $target_db->_bz_real_schema->_get_create_seq_ddl($table, $column, $max_val);
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$target_db->do($_) foreach @sql;
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}
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}
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@ -253,4 +259,3 @@ in the "User-Configurable Settings" section at the top of the script.
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The C<SOURCE> settings are for the database you're copying from, and
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the C<TARGET> settings are for the database you're copying to. The
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C<DB_TYPE> is the name of a DB driver from the F<Bugzilla/DB/> directory.
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