test-alter-table
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上传日期:2019-04-29
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- #!/usr/bin/perl
- # Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
- #
- # This library is free software; you can redistribute it and/or
- # modify it under the terms of the GNU Library General Public
- # License as published by the Free Software Foundation; either
- # version 2 of the License, or (at your option) any later version.
- #
- # This library is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- # Library General Public License for more details.
- #
- # You should have received a copy of the GNU Library General Public
- # License along with this library; if not, write to the Free
- # Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- # MA 02111-1307, USA
- #
- # Test of alter table
- #
- ##################### Standard benchmark inits ##############################
- use DBI;
- use Benchmark;
- $opt_start_field_count=8; # start with this many fields
- $opt_loop_count=20; # How many tests to do
- $opt_row_count=1000; # Rows in the table
- $opt_field_count=1000; # Add until this many fields.
- chomp($pwd = `pwd`); $pwd = "." if ($pwd eq '');
- require "$pwd/bench-init.pl" || die "Can't read Configuration file: $!n";
- $opt_field_count=min($opt_field_count,$limits->{'max_columns'},
- ($limits->{'query_size'}-30)/14);
- $opt_start_field_count=min($opt_start_field_count,$limits->{'max_index'});
- if ($opt_small_test)
- {
- $opt_row_count/=10;
- $opt_field_count/=10;
- }
- if (!$limits->{'alter_table'})
- {
- print("Some of the servers given with --cmp or --server doesn't support ALTER TABLEnTest abortednn");
- $start_time=new Benchmark;
- end_benchmark($start_time);
- exit 0;
- }
- print "Testing of ALTER TABLEn";
- print "Testing with $opt_field_count columns and $opt_row_count rows in $opt_loop_count stepsn";
- ####
- #### Create a table and fill it with data
- ####
- $dbh = $server->connect();
- @fields=();
- @index=();
- push(@fields,"i1 int not null");
- for ($i=2 ; $i <= $opt_start_field_count ; $i++)
- {
- push(@fields,"i${i} int not null");
- }
- $field_count= $opt_start_field_count;
- $start_time=new Benchmark;
- $dbh->do("drop table bench" . $server->{'drop_attr'});
- do_many($dbh,$server->create("bench",@fields,@index));
- print "Insert data into the tablen";
- $loop_time=new Benchmark;
- for ($i=0 ; $i < $opt_row_count ; $i++)
- {
- $query="insert into bench values ( " . ("$i," x ($opt_start_field_count-1)) . "$i)";
- $dbh->do($query) or die $DBI::errstr;
- }
- $end_time=new Benchmark;
- print "Time for insert ($opt_row_count)",
- timestr(timediff($end_time, $loop_time),"all") . "nn";
- ####
- #### Add fields to the table.
- ####
- $loop_time=new Benchmark;
- $add= int(($opt_field_count-$opt_start_field_count)/$opt_loop_count)+1;
- $multi_add=$server->{'limits'}->{'alter_add_multi_col'} == 1;
- if ($opt_fast)
- {
- $add=1 if (!$server->{'limits'}->{'alter_add_multi_col'});
- }
- else
- {
- $add=1 if (!$limits{'alter_add_multi_col'});
- }
- $count=0;
- while ($field_count < $opt_field_count)
- {
- $count++;
- $end=min($field_count+$add,$opt_field_count);
- $fields="";
- $tmp="ADD ";
- while ($field_count < $end)
- {
- $field_count++;
- $fields.=",$tmp i${field_count} integer";
- $tmp="" if (!$multi_add); # Adabas
- }
- do_query($dbh,"ALTER TABLE bench " . substr($fields,1));
- }
- $end_time=new Benchmark;
- print "Time for alter_table_add ($count): " .
- timestr(timediff($end_time, $loop_time),"all") . "nn";
- ####
- #### Test adding and deleting index on the first $opt_start_fields
- ####
- $loop_time=new Benchmark;
- for ($i=1; $i < $opt_start_field_count ; $i++)
- {
- $dbh->do("CREATE INDEX bench_ind$i ON bench (i${i})") || die $DBI::errstr;
- }
- $end_time=new Benchmark;
- print "Time for create_index ($opt_start_field_count): " .
- timestr(timediff($end_time, $loop_time),"all") . "nn";
- $loop_time=new Benchmark;
- for ($i=1; $i < $opt_start_field_count ; $i++)
- {
- $dbh->do($server->drop_index("bench","bench_ind$i")) || die $DBI::errstr;
- }
- $end_time=new Benchmark;
- print "Time for drop_index ($opt_start_field_count): " .
- timestr(timediff($end_time, $loop_time),"all") . "nn";
- ####
- #### Delete fields from the table
- ####
- goto skip_dropcol if (!$limits->{'alter_table_dropcol'});
- $loop_time=new Benchmark;
- $count=0;
- while ($field_count > $opt_start_field_count)
- {
- $count++;
- $end=max($field_count-$add,$opt_start_field_count);
- $fields="";
- while(--$field_count >= $end)
- {
- $fields.=",DROP i${field_count}";
- }
- $dbh->do("ALTER TABLE bench " . substr($fields,1) . $server->{'drop_attr'})
- || die $DBI::errstr;
- }
- $end_time=new Benchmark;
- print "Time for alter_table_drop ($count): " .
- timestr(timediff($end_time, $loop_time),"all") . "nn";
- skip_dropcol:
- ################################ END ###################################
- ####
- #### End of the test...Finally print time used to execute the
- #### whole test.
- $dbh->do("drop table bench" . $server->{'drop_attr'});
- $dbh->disconnect;
- end_benchmark($start_time);