Added back sql-bench directory, so that one can more easily run benchmarks on a server and add new benchmarks for new optimizations

Fixed memory leak in _db_set() (Bug#24497 Valgrind warning: get_one_option)
Don't call net_clear() on COM_QUIT. This avoids a warning from net_clear() after shutdown: "skipped ## bytes from file"
BUG#21428: skipped 9 bytes from file: socket (3)" on "mysqladmin shutdown"

1 files changed, 3620 insertions, 0 deletions

diff --git a/sql-bench/server-cfg.sh b/sql-bench/server-cfg.sh
new file mode 100644
index 00000000000..3122df97f90
--- /dev/null
+++ b/sql-bench/server-cfg.sh
@@ -0,0 +1,3620 @@
+#!@PERL@
+# -*- 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
+#
+# The configuration file for the DBI/DBD tests on different databases ....
+# You will need the DBD module for the database you are running.
+# Monty made this bench script and I (Luuk de Boer) rewrote it to DBI/DBD.
+# Monty rewrote this again to use packages.
+#
+# Each database has a different package that has 3 functions:
+# new		Creates a object with some standard slot
+# version	Version number of the server
+# create	Generates commands to create a table
+#
+
+#
+# First some global functions that help use the packages:
+#
+
+sub get_server
+{
+  my ($name,$host,$database,$odbc,$machine,$socket,$connect_options)=@_;
+  my ($server);
+  if ($name =~ /mysql/i)
+  { $server=new db_MySQL($host, $database, $machine, $socket,$connect_options); }
+  elsif ($name =~ /pg/i)
+  { $server= new db_Pg($host,$database); }
+  elsif ($name =~ /msql/i)
+  { $server= new db_mSQL($host,$database); }
+  elsif ($name =~ /solid/i)
+  { $server= new db_Solid($host,$database); }
+  elsif ($name =~ /Empress/i)
+  { $server= new db_Empress($host,$database); }
+  elsif ($name =~ /FrontBase/i)
+  { $server= new db_FrontBase($host,$database); }
+  elsif ($name =~ /Oracle/i)
+  { $server= new db_Oracle($host,$database); }
+  elsif ($name =~ /Access/i)
+  { $server= new db_access($host,$database); }
+  elsif ($name =~ /Informix/i)
+  { $server= new db_Informix($host,$database); }
+  elsif ($name =~ /ms-sql/i)
+  { $server= new db_ms_sql($host,$database); }
+  elsif ($name =~ /sybase/i)
+  { $server= new db_sybase($host,$database); }
+  elsif ($name =~ /Adabas/i)			# Adabas has two drivers
+  {
+    $server= new db_Adabas($host,$database);
+    if ($name =~ /AdabasD/i)
+    {
+      $server->{'data_source'} =~ s/:Adabas:/:AdabasD:/;
+    }
+  }
+  elsif ($name =~ /DB2/i)
+  { $server= new db_db2($host,$database); }
+  elsif ($name =~ /Mimer/i)
+  { $server= new db_Mimer($host,$database); }
+  elsif ($name =~ /Sapdb/i)
+  { $server= new db_sapdb($host,$database); }
+  elsif ($name =~ /interBase/i)
+  { $server= new db_interbase($host,$database); }
+  else
+  {
+      die "Unknown sql server name used: $name\nUse one of: Access, Adabas, AdabasD, Empress, FrontBase, Oracle, Informix, InterBase, DB2, mSQL, Mimer, MS-SQL, MySQL, Pg, Solid, SAPDB or Sybase.\nIf the connection is done trough ODBC the name must end with _ODBC\n";
+  }
+  if ($name =~ /_ODBC$/i || defined($odbc) && $odbc)
+  {
+    if (! ($server->{'data_source'} =~ /^([^:]*):([^:]+):([^:]*)/ ))
+    {
+      die "Can't find databasename in data_source: '" .
+	  $server->{'data_source'}. "'\n";
+    }
+    if ($3) {
+      $server->{'data_source'} = "$1:ODBC:$3";
+    } else {
+      $server->{'data_source'} = "$1:ODBC:$database";
+    }
+  }
+  return $server;
+}
+
+sub all_servers
+{
+  return ["Access", "Adabas", "DB2", "Empress", "FrontBase", "Oracle",
+	  "Informix", "InterBase", "Mimer", "mSQL", "MS-SQL", "MySQL", "Pg","SAPDB",
+	  "Solid", "Sybase"];
+}
+
+#############################################################################
+#	     First the configuration for MySQL off course :-)
+#############################################################################
+
+package db_MySQL;
+
+sub new
+{
+  my ($type,$host,$database,$machine,$socket,$connect_options)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "mysql";
+  $self->{'data_source'}	= "DBI:mysql:database=$database;host=$host";
+  $self->{'data_source'} .= ";mysql_socket=$socket" if($socket);
+  $self->{'data_source'} .= ";$connect_options" if($connect_options);
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "blob";
+  $self->{'text'}		= "text";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'vacuum'}		= 1; # When using with --fast
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 0; # Transactions disabled by default
+
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'alter_add_multi_col'}= 1; #Have ALTER TABLE t add a int,add b int;
+  $limits{'alter_table'}	= 1; # Have ALTER TABLE
+  $limits{'alter_table_dropcol'}= 1; # Have ALTER TABLE DROP column
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'func_extra_%'}	= 1; # Has % as alias for mod()
+  $limits{'func_extra_if'}	= 1; # Have function if.
+  $limits{'func_extra_in_num'}	= 1; # Has function in
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function
+  $limits{'func_odbc_mod'}	= 1; # Have function mod.
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_by_position'}  = 1; # Can use 'GROUP BY 1'
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'group_func_extra_std'} = 1; # Have group function std().
+  $limits{'group_func_sql_min_str'} = 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'having_with_alias'}  = 1; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can use group functions in HAVING
+  $limits{'insert_multi_value'} = 1; # Have INSERT ... values (1,2),(3,4)
+  $limits{'insert_select'}	= 1;
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'limit'}		= 1; # supports the limit attribute
+  $limits{'truncate_table'}	= 1;
+  $limits{'load_data_infile'}	= 1; # Has load data infile
+  $limits{'lock_tables'}	= 1; # Has lock tables
+  $limits{'max_column_name'}	= 64; # max table and column name
+  $limits{'max_columns'}	= 2000;	# Max number of columns in table
+  $limits{'max_conditions'}	= 9999; # (Actually not a limit)
+  $limits{'max_index'}		= 16; # Max number of keys
+  $limits{'max_index_parts'}	= 16; # Max segments/key
+  $limits{'max_tables'}		= (($machine || '') =~ "^win") ? 5000 : 65000;
+  $limits{'max_text_size'}	= 1000000; # Good enough for tests
+  $limits{'multi_drop'}		= 1; # Drop table can take many tables
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'order_by_unused'}	= 1;
+  $limits{'query_size'}		= 1000000; # Max size with default buffers.
+  $limits{'select_without_from'}= 1; # Can do 'select 1';
+  $limits{'subqueries'}		= 0; # Doesn't support sub-queries.
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'working_all_fields'} = 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+  # Some fixes that depends on the environment
+  if (defined($main::opt_create_options) &&
+      $main::opt_create_options =~ /engine=heap/i)
+  {
+    $limits{'working_blobs'}	= 0; # HEAP tables can't handle BLOB's
+  }
+  if (defined($main::opt_create_options) &&
+      $main::opt_create_options =~ /engine=innodb/i)
+  {
+    $self->{'transactions'}	= 1;	# Transactions enabled
+  }
+  if (defined($main::opt_create_options) &&
+      $main::opt_create_options =~ /engine=ndb/i)
+  {
+    $self->{'transactions'}	= 1;	# Transactions enabled
+    $limits{'max_columns'}	= 90;	# Max number of columns in table
+    $limits{'max_tables'}	= 32;   # No comments
+  }
+  if (defined($main::opt_create_options) &&
+      $main::opt_create_options =~ /engine=bdb/i)
+  {
+    $self->{'transactions'}	= 1;	# Transactions enabled
+  }
+  if (defined($main::opt_create_options) &&
+      $main::opt_create_options =~ /engine=gemini/i)
+  {
+    $limits{'working_blobs'}	= 0; # Blobs not implemented yet
+    $limits{'max_tables'}	= 500;
+    $self->{'transactions'}	= 1;	# Transactions enabled
+  }
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+  $dbh=$self->connect();
+  $sth = $dbh->prepare("select VERSION()") or die $DBI::errstr;
+  $version="MySQL 3.20.?";
+  if ($sth->execute && (@row = $sth->fetchrow_array))
+  {
+    $row[0] =~ s/-/ /g;			# To get better tables with long names
+    $version="MySQL $row[0]";
+  }
+  $sth->finish;
+
+  $sth = $dbh->prepare("show status like 'ssl_version'") or die $DBI::errstr;
+  if ($sth->execute && (@row = $sth->fetchrow_array) && $row[1])
+  {
+    $version .= "/$row[1]";
+  }
+  $sth->finish;
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+#
+# Connection with optional disabling of logging
+#
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+
+  $dbh->do("SET OPTION LOG_OFF=1,UPDATE_LOG=0");
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+# If one uses $main::opt_fast then one is allowed to use
+# non standard types to get better speed.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index,$options) = @_;
+  my($query,@queries);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+#    $field =~ s/ decimal/ double(10,2)/i;
+    $field =~ s/ big_decimal/ double(10,2)/i;
+    $query.= $field . ',';
+  }
+  foreach $index (@$index)
+  {
+    $query.= $index . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  $query.=" $options" if (defined($options));
+  $query.=" $main::opt_create_options" if (defined($main::opt_create_options));
+  push(@queries,$query);
+  return @queries;
+}
+
+sub insert_file {
+  my ($self,$dbname, $file, $dbh) = @_;
+  my ($command, $sth);
+
+  $file =~ s|\\|/|g;			# Change Win32 names to Unix syntax
+  $command = "load data infile '$file' into table $dbname columns optionally enclosed by '\\'' terminated by ','";
+#  print "$command\n";
+  $sth = $dbh->do($command) or die $DBI::errstr;
+  return $sth;			# Contains number of rows
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index {
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index ON $table";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+#
+# This should return 1 if we to do disconnect / connect when doing
+# big batches
+#
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+#
+# reconnect on errors (needed mainly be crash-me)
+#
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#
+# Optimize tables for better performance
+#
+
+sub vacuum
+{
+  my ($self,$full_vacuum,$dbh_ref,@tables)=@_;
+  my ($loop_time,$end_time,$dbh);
+  if ($#tables >= 0)
+  {
+    $dbh=$$dbh_ref;
+    $loop_time=new Benchmark;
+    $dbh->do("OPTIMIZE TABLE " . join(',',@tables)) || die "Got error: $DBI::errstr when executing 'OPTIMIZE TABLE'\n";
+    $end_time=new Benchmark;
+    print "Time for book-keeping (1): " .
+      Benchmark::timestr(Benchmark::timediff($end_time, $loop_time),"all") . "\n\n";
+  }
+}
+
+#############################################################################
+#		     Definitions for mSQL
+#############################################################################
+
+package db_mSQL;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "msql";
+  $self->{'data_source'}	= "DBI:mSQL:$database:$host";
+  $self->{'limits'}		= \%limits;
+  $self->{'double_quotes'}	= 0;
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 0;  # No transactions
+  $self->{'blob'}		= "text(" . $limits{'max_text_size'} .")";
+  $self->{'text'}		= "text(" . $limits{'max_text_size'} .")";
+
+  $limits{'max_conditions'}	= 74;
+  $limits{'max_columns'}	= 75;
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 32000;
+  $limits{'query_size'}		= 65535;
+  $limits{'max_index'}		= 5;
+  $limits{'max_index_parts'}	= 10;
+  $limits{'max_column_name'} = 35;
+
+  $limits{'join_optimizer'}	= 0;		# Can't optimize FROM tables
+  $limits{'load_data_infile'}	= 0;
+  $limits{'lock_tables'}	= 0;
+  $limits{'functions'}		= 0;
+  $limits{'group_functions'}	= 0;
+  $limits{'group_distinct_functions'}= 0;	 # Have count(distinct)
+  $limits{'multi_drop'}		= 0;
+  $limits{'select_without_from'}= 0;
+  $limits{'subqueries'}		= 0;
+  $limits{'left_outer_join'}	= 0;
+  $limits{'table_wildcard'}	= 0;
+  $limits{'having_with_alias'}  = 0;
+  $limits{'having_with_group'}	= 0;
+  $limits{'like_with_column'}	= 1;
+  $limits{'order_by_position'}  = 1;
+  $limits{'group_by_position'}  = 1;
+  $limits{'alter_table'}	= 0;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 0;
+  $limits{'group_func_extra_std'} = 0;
+  $limits{'limit'}		= 1;		# supports the limit attribute
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 0;
+
+  $limits{'func_odbc_mod'}	= 0;
+  $limits{'func_extra_%'}	= 0;
+  $limits{'func_odbc_floor'}	= 0;
+  $limits{'func_extra_if'}	= 0;
+  $limits{'column_alias'}	= 0;
+  $limits{'NEG'}		= 0;
+  $limits{'func_extra_in_num'}	= 0;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($tmp,$dir);
+  foreach $dir ("/usr/local/Hughes", "/usr/local/mSQL","/my/local/mSQL",
+		"/usr/local")
+  {
+    if (-x "$dir/bin/msqladmin")
+    {
+      $tmp=`$dir/bin/msqladmin version | grep server`;
+      if ($tmp =~ /^\s*(.*\w)\s*$/)
+      {				# Strip pre- and endspace
+	$tmp=$1;
+	$tmp =~ s/\s+/ /g;	# Remove unnecessary spaces
+	$tmp .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+
+	return $tmp;
+      }
+    }
+  }
+  return "mSQL version ???";
+}
+
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Can't handle many field types, so we map everything to int and real.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$name,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/varchar/char/i;		# mSQL doesn't have VARCHAR()
+    # mSQL can't handle more than the real basic int types
+    $field =~ s/tinyint|smallint|mediumint|integer/int/i;
+    # mSQL can't handle different visual lengths
+    $field =~ s/int\(\d*\)/int/i;
+    # mSQL doesn't have float, change it to real
+    $field =~ s/float(\(\d*,\d*\)){0,1}/real/i;
+    $field =~ s/double(\(\d*,\d*\)){0,1}/real/i;
+    # mSQL doesn't have blob, it has text instead
+    if ($field =~ / blob/i)
+    {
+      $name=$self->{'blob'};
+      $field =~ s/ blob/ $name/;
+    }
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=0;
+
+  # Prepend table_name to index name because the the name may clash with
+  # a field name. (Should be diffent name space, but this is mSQL...)
+
+  foreach $index (@$index)
+  {
+    # Primary key is unique index in mSQL
+    $index =~ s/primary key/unique index primary/i;
+    if ($index =~ /^unique\s*\(([^\(]*)\)$/i)
+    {
+      $nr++;
+      push(@queries,"create unique index ${table_name}_$nr on $table_name ($1)");
+    }
+    else
+    {
+      if (!($index =~ /^(.*index)\s+(\w*)\s+(\(.*\))$/i))
+      {
+	die "Can't parse index information in '$index'\n";
+      }
+      push(@queries,"create $1 ${table_name}_$2 on $table_name $3");
+    }
+  }
+  return @queries;
+}
+
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  print "insert an ascii file isn't supported by mSQL\n";
+  return 0;
+}
+
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index FROM $table";
+}
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#		     Definitions for PostgreSQL				    #
+#############################################################################
+
+package db_Pg;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "pg";
+  $self->{'data_source'}	= "DBI:Pg:dbname=$database";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "text";
+  $self->{'text'}		= "text";
+  $self->{'double_quotes'}	= 1;
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+  $self->{"vacuum"}		= 1;
+  $limits{'join_optimizer'}	= 1;		# Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0;
+
+  $limits{'NEG'}		= 1;
+  $limits{'alter_add_multi_col'}= 0;		# alter_add_multi_col ?
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_table_dropcol'}= 0;
+  $limits{'column_alias'}	= 1;
+  $limits{'func_extra_%'}	= 1;
+  $limits{'func_extra_if'}	= 0;
+  $limits{'func_extra_in_num'}	= 1;
+  $limits{'func_odbc_floor'}	= 1;
+  $limits{'func_odbc_mod'}	= 1;		# Has %
+  $limits{'functions'}		= 1;
+  $limits{'group_by_position'}  = 1;
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'group_func_extra_std'} = 0;
+  $limits{'group_func_sql_min_str'}= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_functions'}	= 1;
+  $limits{'having_with_alias'}  = 0;
+  $limits{'having_with_group'}	= 1;
+  $limits{'insert_select'}	= 1;
+  $limits{'left_outer_join'}	= 1;
+  $limits{'like_with_column'}	= 1;
+  $limits{'lock_tables'}	= 0;		# in ATIS gives this a problem
+  $limits{'max_column_name'} 	= 128;
+  $limits{'max_columns'}	= 1000;		# 500 crashes pg 6.3
+  $limits{'max_conditions'}	= 9999;		# This makes Pg real slow
+  $limits{'max_index'}		= 64;		# Big enough
+  $limits{'max_index_parts'}	= 16;
+  $limits{'max_tables'}		= 5000;		# 10000 crashes pg 7.0.2
+  $limits{'max_text_size'}	= 65000;	# Good enough for test
+  $limits{'multi_drop'}		= 1;
+  $limits{'order_by_position'}  = 1;
+  $limits{'order_by_unused'}	= 1;
+  $limits{'query_size'}		= 16777216;
+  $limits{'select_without_from'}= 1;
+  $limits{'subqueries'}		= 1;
+  $limits{'table_wildcard'}	= 1;
+  $limits{'truncate_table'}	= 1;
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'working_all_fields'} = 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+  return $self;
+}
+
+# couldn't find the option to get the version number
+
+sub version
+{
+  my ($version,$dir);
+  $version = "PostgreSQL version ???";
+  foreach $dir ($ENV{'PGDATA'},"/usr/local/pgsql/data", "/usr/local/pg/data")
+  {
+    if ($dir && -e "$dir/PG_VERSION")
+    {
+      $version= `cat $dir/PG_VERSION`;
+      if ($? == 0)
+      {
+	chomp($version);
+	$version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+	return "PostgreSQL $version";
+      }
+    }
+  }
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$name,$in,$indfield,$table,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    if ($main::opt_fast)
+    {
+      # Allow use of char2, char4, char8 or char16
+      $field =~ s/char(2|4|8|16)/char$1/;
+    }
+    # Pg can't handle more than the real basic int types
+    $field =~ s/tinyint|smallint|mediumint|integer/int/;
+    # Pg can't handle different visual lengths
+    $field =~ s/int\(\d*\)/int/;
+    $field =~ s/float\(\d*,\d*\)/float/;
+    $field =~ s/ double/ float/;
+#    $field =~ s/ decimal/ float/i;
+#    $field =~ s/ big_decimal/ float/i;
+#    $field =~ s/ date/ int/i;
+    # Pg doesn't have blob, it has text instead
+    $field =~ s/ blob/ text/;
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  foreach $index (@$index)
+  {
+    $index =~ s/primary key/unique index primary_key/i;
+    if ($index =~ /^unique.*\(([^\(]*)\)$/i)
+    {
+      # original: $indfield="using btree (" .$1.")";
+      # using btree doesn´t seem to work with Postgres anymore; it creates
+      # the table and adds the index, but it isn´t unique
+      $indfield=" (" .$1.")";	
+      $in="unique index";
+      $table="index_$nr"; $nr++;
+    }
+    elsif ($index =~ /^(.*index)\s+(\w*)\s+(\(.*\))$/i)
+    {
+      # original: $indfield="using btree (" .$1.")";
+      $indfield=" " .$3;
+      $in="index";
+      $table="index_$nr"; $nr++;
+    }
+    else
+    {
+      die "Can't parse index information in '$index'\n";
+    }
+    push(@queries,"create $in ${table_name}_$table on $table_name $indfield");
+  }
+  $queries[0]=$query;
+  return @queries;
+}
+
+sub insert_file {
+  my ($self,$dbname, $file, $dbh) = @_;
+  my ($command, $sth);
+
+# Syntax:
+# copy [binary] <class_name> [with oids]
+#      {to|from} {<filename>|stdin|stdout} [using delimiters <delim>]
+  print "The ascii files aren't correct for postgres ....!!!\n";
+  $command = "copy $dbname from '$file' using delimiters ','";
+  print "$command\n";
+  $sth = $dbh->do($command) or die $DBI::errstr;
+  return $sth;
+}
+
+#
+# As postgreSQL wants A % B instead of standard mod(A,B) we have to map
+# This will not handle all cases, but as the benchmarks doesn't use functions
+# inside MOD() the following should work
+#
+# PostgreSQL cant handle count(*) or even count(1), but it can handle
+# count(1+1) sometimes. ==> this is solved in PostgreSQL 6.3
+#
+# PostgreSQL 6.5 is supporting MOD.
+
+sub query {
+  my($self,$sql) = @_;
+  my(@select,$change);
+# if you use PostgreSQL 6.x and x is lower as 5 then uncomment the line below.
+#  $sql =~ s/mod\(([^,]*),([^\)]*)\)/\($1 % $2\)/gi;
+#
+# if you use PostgreSQL 6.1.x uncomment the lines below
+#  if ($sql =~ /select\s+count\(\*\)\s+from/i) {
+#  }
+#  elsif ($sql =~ /count\(\*\)/i)
+#  {
+#    if ($sql =~ /select\s+(.*)\s+from/i)
+#    {
+#      @select = split(/,/,$1);
+#      if ($select[0] =~ /(.*)\s+as\s+\w+$/i)
+#      {
+# 	$change = $1;
+#      }
+#      else
+#      {
+#	$change = $select[0];
+#      }
+#    }
+#    if (($change =~ /count/i) || ($change eq "")) {
+#      $change = "1+1";
+#    }
+#    $sql =~ s/count\(\*\)/count($change)/gi;
+#  }
+# till here.
+  return $sql;
+}
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+sub abort_if_fatal_error
+{
+  return 1 if ($DBI::errstr =~ /sent to backend, but backend closed/i);
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+sub vacuum
+{
+  my ($self,$full_vacuum,$dbh_ref,@tables)=@_;
+  my ($loop_time,$end_time,$dbh,$table);
+  if (defined($full_vacuum))
+  {
+    $$dbh_ref->disconnect;  $$dbh_ref= $self->connect();
+  }
+  $dbh=$$dbh_ref;
+  $loop_time=new Benchmark;
+  if ($#tables >= 0)
+  {
+    foreach $table (@tables)
+    {
+      $dbh->do("vacuum analyze $table") || die "Got error: $DBI::errstr when executing 'vacuum analyze $table'\n";
+      $dbh->do("vacuum $table") || die "Got error: $DBI::errstr when executing 'vacuum'\n";
+    }
+  }
+  else
+  {
+#    $dbh->do("vacuum pg_attributes") || die "Got error: $DBI::errstr when executing 'vacuum'\n";
+#    $dbh->do("vacuum pg_index") || die "Got error: $DBI::errstr when executing 'vacuum'\n";
+    $dbh->do("vacuum analyze") || die "Got error: $DBI::errstr when executing 'vacuum analyze'\n";
+    $dbh->do("vacuum") || die "Got error: $DBI::errstr when executing 'vacuum'\n";
+  }
+  $end_time=new Benchmark;
+  print "Time for book-keeping (1): " .
+  Benchmark::timestr(Benchmark::timediff($end_time, $loop_time),"all") . "\n\n";
+  $dbh->disconnect;  $$dbh_ref= $self->connect();
+}
+
+
+#############################################################################
+#		     Definitions for Solid
+#############################################################################
+
+package db_Solid;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "solid";
+  $self->{'data_source'}	= "DBI:Solid:";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "long varchar";
+  $self->{'text'}		= "long varchar";
+  $self->{'double_quotes'}	= 1;
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+
+  $limits{'max_conditions'}	= 9999;		# Probably big enough
+  $limits{'max_columns'}	= 2000;		# From crash-me
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 65492;	# According to tests
+  $limits{'query_size'}		= 65535;	# Probably a limit
+  $limits{'max_index'}		= 64;		# Probably big enough
+  $limits{'max_index_parts'}	= 64;
+  $limits{'max_column_name'} = 80;
+
+  $limits{'join_optimizer'}	= 1;
+  $limits{'load_data_infile'}	= 0;
+  $limits{'lock_tables'}	= 0;
+  $limits{'functions'}		= 1;
+  $limits{'group_functions'}	= 1;
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 0;		# Can do 'select 1' ?;
+  $limits{'multi_drop'}		= 0;
+  $limits{'subqueries'}		= 1;
+  $limits{'left_outer_join'}	= 1;
+  $limits{'table_wildcard'}	= 1;
+  $limits{'having_with_alias'}  = 0;
+  $limits{'having_with_group'}	= 1;
+  $limits{'like_with_column'}	= 1;
+  $limits{'order_by_position'}  = 0;		# 2.30.0018 can this
+  $limits{'group_by_position'}  = 0;
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 0;
+
+  $limits{'group_func_extra_std'}	= 0;	# Have group function std().
+
+  $limits{'func_odbc_mod'}	= 1;
+  $limits{'func_extra_%'}	= 0;
+  $limits{'func_odbc_floor'}	= 1;
+  $limits{'column_alias'}	= 1;
+  $limits{'NEG'}		= 1;
+  $limits{'func_extra_in_num'}	= 1;
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($version,$dir);
+  $version="Solid version ??";
+  foreach $dir ($ENV{'SOLIDDIR'},"/usr/local/solid", "/my/local/solid")
+  {
+    if ($dir && -e "$dir/bin/solcon")
+    {
+      $version=`$dir/bin/solcon -e"ver" $main::opt_user $main::opt_password | grep Server | sed q`;
+      if ($? == 0)
+      {
+	chomp($version);
+	$version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+	return $version;
+      }
+    }
+  }
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/mediumint/integer/i;
+    $field =~ s/ double/ float/i;
+    # Solid doesn't have blob, it has long varchar
+    $field =~ s/ blob/ long varchar/;
+#    $field =~ s/ decimal/ float/i;
+#    $field =~ s/ big_decimal/ float/i;
+#    $field =~ s/ date/ int/i;
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=0;
+  foreach $index (@$index)
+  {
+    if ($index =~ /^primary key/i || $index =~ /^unique/i)
+    {					# Add to create statement
+      substr($queries[0],-1,0)="," . $index;
+    }
+    else
+    {
+      $index =~ /^(.*)\s+(\(.*\))$/;
+      push(@queries,"create ${1}$nr on $table_name $2");
+      $nr++;
+    }
+  }
+  return @queries;
+}
+
+# there is no sql statement in solid which can do the load from
+# an ascii file in the db ... but there is the speedloader program
+# an external program which can load the ascii file in the db ...
+# the server must be down before using speedloader !!!!
+# (in the standalone version)
+# it works also with a control file ... that one must be made ....
+sub insert_file {
+  my ($self, $dbname, $file) = @_;
+  my ($speedcmd);
+  $speedcmd = '/usr/local/solid/bin/solload';
+  print "At this moment not supported - solid server must go down \n";
+  return 0;
+}
+
+# solid can't handle an alias in a having statement so
+# select test as foo from tmp group by foo having foor > 2
+# becomes
+# select test as foo from tmp group by foo having test > 2
+#
+sub query {
+  my($self,$sql) = @_;
+  my(@select,$tmp,$newhaving,$key,%change);
+
+  if ($sql =~ /having\s+/i)
+  {
+    if ($sql =~ /select (.*) from/i)
+    {
+      (@select) = split(/,\s*/, $1);
+      foreach $tmp (@select)
+      {
+	if ($tmp =~ /(.*)\s+as\s+(\w+)/)
+	{
+	  $change{$2} = $1;
+	}
+      }
+    }
+    if ($sql =~ /having\s+(\w+)/i)
+    {
+      $newhaving = $1;
+      foreach $key (sort {$a cmp $b} keys %change)
+      {
+	if ($newhaving eq $key)
+	{
+	  $newhaving =~ s/$key/$change{$key}/g;
+	}
+      }
+    }
+    $sql =~ s/(having)\s+(\w+)/$1 $newhaving/i;
+  }
+  return $sql;
+}
+
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+#############################################################################
+#		     Definitions for Empress
+#
+# at this moment DBI:Empress can only handle 200 prepare statements ...
+# so Empress can't be tested with the benchmark test :(
+#############################################################################
+
+package db_Empress;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "empress";
+  $self->{'data_source'}        = "DBI:EmpressNet:SERVER=$host;Database=/usr/local/empress/rdbms/bin/$database";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "text";
+  $self->{'text'}		= "text";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+
+  $limits{'max_conditions'}	= 1258;
+  $limits{'max_columns'}	= 226;		# server is disconnecting????
+			# above this value .... but can handle 2419 columns
+			# maybe something for crash-me ... but how to check ???
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 4095;		# max returned ....
+  $limits{'query_size'}		= 65535;	# Not a limit, big enough
+  $limits{'max_index'}		= 64;		# Big enough
+  $limits{'max_index_parts'}	= 64;		# Big enough
+  $limits{'max_column_name'} 	= 31;
+
+  $limits{'join_optimizer'}	= 1;
+  $limits{'load_data_infile'}	= 0;
+  $limits{'lock_tables'}	= 1;
+  $limits{'functions'}		= 1;
+  $limits{'group_functions'}	= 1;
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 0;
+  $limits{'multi_drop'}		= 0;
+  $limits{'subqueries'}		= 1;
+  $limits{'table_wildcard'}	= 0;
+  $limits{'having_with_alias'}  = 0; 	# AS isn't supported in a select
+  $limits{'having_with_group'}	= 1;
+  $limits{'like_with_column'}	= 1;
+  $limits{'order_by_position'}  = 1;
+  $limits{'group_by_position'}  = 0;
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 0;
+
+  $limits{'group_func_extra_std'}= 0;	# Have group function std().
+
+  $limits{'func_odbc_mod'}	= 0;
+  $limits{'func_extra_%'}	= 1;
+  $limits{'func_odbc_floor'}	= 1;
+  $limits{'func_extra_if'}	= 0;
+  $limits{'column_alias'}	= 0;
+  $limits{'NEG'}		= 1;
+  $limits{'func_extra_in_num'}	= 0;
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self,$dbh)=@_;
+  my ($version);
+  $version="";
+  if (-x "/usr/local/empress/rdbms/bin/empvers")
+  {
+    $version=`/usr/local/empress/rdbms/bin/empvers | grep Version`;
+  }
+  if ($version)
+  {
+    chomp($version);
+  }
+  else
+  {
+    $version="Empress version ???";
+  }
+
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  my($command,$sth);
+  $command = "insert into $dbname from '$file'";
+  print "$command\n" if ($opt_debug);
+  $sth = $dbh->do($command) or die $DBI::errstr;
+
+  return $sth;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/mediumint/int/i;
+    $field =~ s/tinyint/int/i;
+    $field =~ s/smallint/int/i;
+    $field =~ s/longint/int/i;
+    $field =~ s/integer/int/i;
+    $field =~ s/ double/ longfloat/i;
+    # Solid doesn't have blob, it has long varchar
+#    $field =~ s/ blob/ text(65535,65535,65535,65535)/;
+    $field =~ s/ blob/ text/;
+    $field =~ s/ varchar\((\d+)\)/ char($1,3)/;
+    $field =~ s/ char\((\d+)\)/ char($1,3)/;
+#    $field =~ s/ decimal/ float/i;
+#    $field =~ s/ big_decimal/ longfloat/i;
+#    $field =~ s/ date/ int/i;
+    $field =~ s/ float(.*)/ float/i;
+    if ($field =~ / int\((\d+)\)/) {
+      if ($1 > 4) {
+        $field =~ s/ int\(\d+\)/ longinteger/i;
+      } else {
+        $field =~ s/ int\(\d+\)/ longinteger/i;
+      }
+    } else {
+      $field =~ s/ int/ longinteger/i;
+    }
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=1;
+  foreach $index (@$index)
+  {
+    # Primary key is unique index in Empress
+    $index =~ s/primary key/unique index/i;
+    if ($index =~ /^unique.*\(([^\(]*)\)$/i)
+    {
+      $nr++;
+      push(@queries,"create unique index ${table_name}_$nr on $table_name ($1)");
+    }
+    else
+    {
+      if (!($index =~ /^(.*index)\s+(\w*)\s+(\(.*\))$/i))
+      {
+	die "Can't parse index information in '$index'\n";
+      }
+      push(@queries,"create $1 ${table_name}_$2 on $table_name $3");
+    }
+  }
+  return @queries;
+}
+
+# empress can't handle an alias and but can handle the number of the
+# columname - so
+# select test as foo from tmp order by foo
+# becomes
+# select test from tmp order by 1
+#
+sub query {
+  my($self,$sql) = @_;
+  my(@select,$i,$tmp,$newselect,$neworder,@order,$key,%change);
+  my($tmp1,$otmp,$tmp2);
+
+  if ($sql =~ /\s+as\s+/i)
+  {
+    if ($sql =~ /select\s+(.*)\s+from/i) {
+      $newselect = $1;
+      (@select) = split(/,\s*/, $1);
+      $i = 1;
+      foreach $tmp (@select) {
+	if ($tmp =~ /\s+as\s+(\w+)/) {
+	  $change{$1} = $i;
+	}
+	$i++;
+      }
+    }
+    $newselect =~ s/\s+as\s+(\w+)//gi;
+    $tmp2 = 0;
+    if ($sql =~ /order\s+by\s+(.*)$/i) {
+      (@order) = split(/,\s*/, $1);
+      foreach $otmp (@order) {
+	foreach $key (sort {$a cmp $b} keys %change) {
+	  if ($otmp eq $key) {
+	    $neworder .= "$tmp1"."$change{$key}";
+	    $tmp1 = ", ";
+	    $tmp2 = 1;
+	  } elsif ($otmp =~ /(\w+)\s+(.+)$/) {
+	    if ($key eq $1) {
+	      $neworder .= "$tmp1"."$change{$key} $2";
+	      $tmp2 = 1;
+	    }
+	  }
+	}
+	if ($tmp2 == 0) {
+	  $neworder .= "$tmp1"."$otmp";
+	}
+	$tmp2 = 0;
+	$tmp1 = ", ";
+      }
+    }
+    $sql =~ s/(select)\s+(.*)\s+(from)/$1 $newselect $3/i;
+    $sql =~ s/(order\s+by)\s+(.*)$/$1 $neworder/i;
+  }
+  return $sql;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  $cmd =~ s/\'\'/\' \'/g;
+  return $cmd;
+}
+
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+# This is a because of the 200 statement problem with DBI-Empress
+
+sub abort_if_fatal_error
+{
+  if ($DBI::errstr =~ /Overflow of table of prepared statements/i)
+  {
+    print "Overflow of prepared statements ... killing the process\n";
+    exit 1;
+  }
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+#############################################################################
+#	                 Definitions for Oracle
+#############################################################################
+
+package db_Oracle;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "Oracle";
+  $self->{'data_source'}	= "DBI:Oracle:$database";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "long";
+  $self->{'text'}		= "long";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+  $self->{"vacuum"}		= 1;
+
+  $limits{'max_conditions'}	= 9999; # (Actually not a limit)
+  $limits{'max_columns'}	= 254;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000; # Should be big enough
+  $limits{'max_text_size'}	= 2000; # Limit for blob test-connect
+  $limits{'query_size'}		= 65525; # Max size with default buffers.
+  $limits{'max_index'}		= 16; # Max number of keys
+  $limits{'max_index_parts'}	= 16; # Max segments/key
+  $limits{'max_column_name'} = 32; # max table and column name
+
+  $limits{'truncate_table'}	= 1;
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 0;
+  $limits{'multi_drop'}		= 0;
+  $limits{'subqueries'}		= 1;
+  $limits{'left_outer_join'}	= 0; # This may be fixed in the query module
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can't use group functions in HAVING
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0;
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 0;
+
+  $limits{'group_func_extra_std'}	= 0; # Have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Oracle has problem with mod()
+  $limits{'func_extra_%'}	= 0; # Has % as alias for mod()
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 1; # Has function in
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+  $dbh=$self->connect();
+  $sth = $dbh->prepare("select VERSION from product_component_version WHERE PRODUCT like 'Oracle%'") or die $DBI::errstr;
+  $version="Oracle 7.x";
+  if ($sth->execute && (@row = $sth->fetchrow_array))
+  {
+    $version="Oracle $row[0]";
+  }
+  $sth->finish;
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+# If one uses $main::opt_fast then one is allowed to use
+# non standard types to get better speed.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$ind,@keys);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/ character\((\d+)\)/ char\($1\)/i;
+    $field =~ s/ character varying\((\d+)\)/ varchar\($1\)/i;
+    $field =~ s/ char varying\((\d+)\)/ varchar\($1\)/i;
+    $field =~ s/ integer/ number\(38\)/i;
+    $field =~ s/ int/ number\(38\)/i;
+    $field =~ s/ tinyint/ number\(38\)/i;
+    $field =~ s/ smallint/ number\(38\)/i;
+    $field =~ s/ mediumint/ number\(38\)/i;
+    $field =~ s/ tinynumber\((\d+)\)\((\d+)\)/ number\($1,$2\)/i;
+    $field =~ s/ smallnumber\((\d+)\)\((\d+)\)/ number\($1,$2\)/i;
+    $field =~ s/ mediumnumber\((\d+)\)\((\d+)\)/ number\($1,$2\)/i;
+    $field =~ s/ number\((\d+)\)\((\d+)\)/ number\($1,$2\)/i;
+    $field =~ s/ numeric\((\d+)\)\((\d+)\)/ number\($1,$2\)/i;
+    $field =~ s/ decimal\((\d+)\)\((\d+)\)/ number\($1,$2\)/i;
+    $field =~ s/ dec\((\d+)\)\((\d+)\)/ number\($1,$2\)/i;
+    $field =~ s/ float/ number/;
+    $field =~ s/ real/ number/;
+    $field =~ s/ double precision/ number/;
+    $field =~ s/ double/ number/;
+    $field =~ s/ blob/ long/;
+    $query.= $field . ',';
+  }
+
+  foreach $ind (@$index)
+  {
+    my @index;
+    if ( $ind =~ /\bKEY\b/i ){
+      push(@keys,"ALTER TABLE $table_name ADD $ind");
+    }else{
+      my @fields = split(' ',$index);
+      my $query="CREATE INDEX $fields[1] ON $table_name $fields[2]";
+      push(@index,$query);
+    }
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query,@keys,@index);
+#print "query:$query\n";
+
+  return @queries;
+}
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  print "insert an ascii file isn't supported by Oracle (?)\n";
+  return 0;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  $cmd =~ s/\'\'/\' \'/g;
+  return $cmd;
+}
+
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 1;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+#
+# optimize the tables ....
+#
+sub vacuum
+{
+  my ($self,$full_vacuum,$dbh_ref)=@_;
+  my ($loop_time,$end_time,$sth,$dbh);
+
+  if (defined($full_vacuum))
+  {
+    $$dbh_ref->disconnect;  $$dbh_ref= $self->connect();
+  }
+  $dbh=$$dbh_ref;
+  $loop_time=new Benchmark;
+  # first analyze all tables
+  $sth = $dbh->prepare("select table_name from user_tables") || die "Got error: $DBI::errstr";
+  $sth->execute || die "Got error: $DBI::errstr when select user_tables";
+  while (my @r = $sth->fetchrow_array)
+  {
+    $dbh->do("analyze table $r[0] compute statistics") || die "Got error: $DBI::errstr when executing 'analyze table'\n";
+  }
+  # now analyze all indexes ...
+  $sth = $dbh->prepare("select index_name from user_indexes") || die "Got error: $DBI::errstr";
+  $sth->execute || die "Got error: $DBI::errstr when select user_indexes";
+  while (my @r1 = $sth->fetchrow_array)
+  {
+    $dbh->do("analyze index $r1[0] compute statistics") || die "Got error: $DBI::errstr when executing 'analyze index $r1[0]'\n";
+  }
+  $end_time=new Benchmark;
+  print "Time for book-keeping (1): " .
+  Benchmark::timestr(Benchmark::timediff($end_time, $loop_time),"all") . "\n\n";
+  $dbh->disconnect;  $$dbh_ref= $self->connect();
+}
+
+
+#############################################################################
+#	                 Definitions for Informix
+#############################################################################
+
+package db_Informix;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "Informix";
+  $self->{'data_source'}	= "DBI:Informix:$database";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "byte in table";
+  $self->{'text'}		= "byte in table";
+  $self->{'double_quotes'}	= 0; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+  $self->{'host'}		= $host;
+
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 1;
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'func_extra_%'}	= 0; # Has % as alias for mod()
+  $limits{'func_extra_if'}	= 0; # Have function if.
+  $limits{'func_extra_in_num'}= 0; # Has function in
+  $limits{'func_odbc_floor'}	= 0; # Has func_odbc_floor function
+  $limits{'func_odbc_mod'}	= 1; # Have function mod.
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_by_position'}  = 1; # Can use 'GROUP BY 1'
+  $limits{'group_by_alias'}  = 0; # Can use 'select a as ab from x GROUP BY ab'
+  $limits{'group_func_extra_std'} = 0; # Have group function std().
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}= 1; # Can't use group functions in HAVING
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables (always 1 only for msql)
+  $limits{'left_outer_join'}	= 0; # Supports left outer joins (ANSI)
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 1; # Has lock tables
+  $limits{'max_conditions'}	= 1214; # (Actually not a limit)
+  $limits{'max_column_name'}	= 18; # max table and column name
+  $limits{'max_columns'}	= 994;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_index'}		= 64; # Max number of keys
+  $limits{'max_index_parts'}	= 15; # Max segments/key
+  $limits{'max_text_size'}	= 65535;  # Max size with default buffers. ??
+  $limits{'multi_drop'}		= 0; # Drop table can take many tables
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'query_size'}		= 32766; # Max size with default buffers.
+  $limits{'select_without_from'}= 0; # Can do 'select 1';
+  $limits{'subqueries'}		= 1; # Doesn't support sub-queries.
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+  $ENV{'INFORMIXSERVER'} = $self->{'host'};
+  $dbh=$self->connect();
+  $sth = $dbh->prepare("SELECT owner FROM systables WHERE tabname = ' VERSION'")
+						      or die $DBI::errstr;
+  $version='Informix unknown';
+  if ($sth->execute && (@row = $sth->fetchrow_array))
+  {
+    $version="Informix $row[0]";
+  }
+  $sth->finish;
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+
+#
+# Create table
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$name,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+#    $field =~ s/\btransport_description\b/transport_desc/;
+				# to overcome limit 18 chars
+    $field =~ s/tinyint/smallint/i;
+    $field =~ s/tinyint\(\d+\)/smallint/i;
+    $field =~ s/mediumint/integer/i;
+    $field =~ s/mediumint\(\d+\)/integer/i;
+    $field =~ s/smallint\(\d+\)/smallint/i;
+    $field =~ s/integer\(\d+\)/integer/i;
+    $field =~ s/int\(\d+\)/integer/i;
+#    $field =~ s/\b(?:small)?int(?:eger)?\((\d+)\)/decimal($1)/i;
+#    $field =~ s/float(\(\d*,\d*\)){0,1}/real/i;
+    $field =~ s/(float|double)(\(.*?\))?/float/i;
+
+    if ($field =~ / blob/i)
+    {
+      $name=$self->{'blob'};
+      $field =~ s/ blob/ $name/;
+    }
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=0;
+
+  foreach $index (@$index)
+  {
+    # Primary key is unique index in Informix
+    $index =~ s/primary key/unique index primary/i;
+    if ($index =~ /^unique\s*\(([^\(]*)\)$/i)
+    {
+      $nr++;
+      push(@queries,"create unique index ${table_name}_$nr on $table_name ($1)");
+    }
+    else
+    {
+      if (!($index =~ /^(.*index)\s+(\w*)\s+(\(.*\))$/i))
+      {
+	die "Can't parse index information in '$index'\n";
+      }
+      ### push(@queries,"create $1 ${table_name}_$2 on $table_name $3");
+      $nr++;
+      push(@queries,"create $1 ${table_name}_$nr on $table_name $3");
+    }
+  }
+  return @queries;
+}
+#
+# Some test needed this
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  $cmd =~ s/\\\'//g;
+  return $cmd;
+}
+
+
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+
+#############################################################################
+#	     Configuration for Access
+#############################################################################
+
+package db_access;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "access";
+  $self->{'data_source'}	= "DBI:ODBC:$database";
+  if (defined($host) && $host ne "")
+  {
+    $self->{'data_source'}	.= ":$host";
+  }
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "blob";
+  $self->{'text'}		= "blob"; # text ? 
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+
+  $limits{'max_conditions'}	= 97; # We get 'Query is too complex'
+  $limits{'max_columns'}	= 255;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 255;  # Max size with default buffers.
+  $limits{'query_size'}		= 65535; # Not a limit, big enough
+  $limits{'max_index'}		= 32; # Max number of keys
+  $limits{'max_index_parts'}	= 10; # Max segments/key
+  $limits{'max_column_name'}	= 64; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 0; # Have count(distinct)
+  $limits{'select_without_from'}= 1; # Can do 'select 1';
+  $limits{'multi_drop'}		= 0; # Drop table can take many tables
+  $limits{'subqueries'}		= 1; # Supports sub-queries.
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can use group functions in HAVING
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0; # Can use 'GROUP BY 1'
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 2; #Have ALTER TABLE t add a int, b int;
+  $limits{'alter_table_dropcol'}= 1;
+
+  $limits{'group_func_extra_std'} = 0; # Have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Have function mod.
+  $limits{'func_extra_%'}	= 0; # Has % as alias for mod()
+  $limits{'func_odbc_floor'}	= 0; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 1; # Has function in
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my $version="Access 2000";
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;		#DBI/ODBC can't return the server version
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/mediumint/integer/i;
+    $field =~ s/tinyint/smallint/i;
+    $field =~ s/float\(\d+,\d+\)/float/i;
+    $field =~ s/integer\(\d+\)/integer/i;
+    $field =~ s/smallint\(\d+\)/smallint/i;
+    $field =~ s/int\(\d+\)/integer/i;
+    $field =~ s/blob/text/i;
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=0;
+  foreach $index (@$index)
+  {
+    $ext="WITH DISALLOW NULL";
+    if (($index =~ s/primary key/unique index primary_key/i))
+    {
+      $ext="WITH PRIMARY;"
+    }
+    if ($index =~ /^unique.*\(([^\(]*)\)$/i)
+    {
+      $nr++;
+      $index="unique index ${table_name}_$nr ($1)";
+    }
+    $index =~ /^(.*)\s+(\(.*\))$/;
+    push(@queries,"create ${1} on $table_name $2");
+  }
+  return @queries;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index ON $table";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 1 if (($DBI::errstr =~ /The database engine couldn\'t lock table/i) ||
+               ($DBI::errstr =~ /niet vergrendelen. De tabel is momenteel in gebruik /i) ||
+	       ($DBI::errstr =~ /Den anv.* redan av en annan/i) ||
+	       ($DBI::errstr =~ /non-exclusive access/));
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 1;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#	     Configuration for Microsoft SQL server
+#############################################################################
+
+package db_ms_sql;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "ms-sql";
+  $self->{'data_source'}	= "DBI:ODBC:$database";
+  if (defined($host) && $host ne "")
+  {
+    $self->{'data_source'}	.= ":$host";
+  }
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "text";
+  $self->{'text'}		= "text";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+
+  $limits{'max_conditions'}	= 1030; # We get 'Query is too complex'
+  $limits{'max_columns'}	= 250;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 9830;  # Max size with default buffers.
+  $limits{'query_size'}		= 9830; # Max size with default buffers.
+  $limits{'max_index'}		= 64; # Max number of keys
+  $limits{'max_index_parts'}	= 15; # Max segments/key
+  $limits{'max_column_name'}	= 30; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 1; # Can do 'select 1';
+  $limits{'multi_drop'}		= 1; # Drop table can take many tables
+  $limits{'subqueries'}		= 1; # Supports sub-queries.
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can't use group functions in HAVING
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0; # Can use 'GROUP BY 1'
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 0;
+
+  $limits{'group_func_extra_std'} = 0; # Have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Have function mod.
+  $limits{'func_extra_%'}	= 1; # Has % as alias for mod()
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 0; # Has function in
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my($sth,@row, $version);
+  $version='MS SQL server ?';
+  $dbh=$self->connect();
+  $sth = $dbh->prepare("SELECT \@\@VERSION") or die $DBI::errstr;
+  $sth->execute or die $DBI::errstr;
+  @row = $sth->fetchrow_array;
+  if ($row[0]) {
+     @server = split(/\n/,$row[0]);
+     chomp(@server);
+     $version= "$server[0]";
+  } 
+  $sth->finish;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/mediumint/integer/i;
+    $field =~ s/float\(\d+,\d+\)/float/i;
+    $field =~ s/double\(\d+,\d+\)/float/i;
+    $field =~ s/double/float/i;
+    $field =~ s/integer\(\d+\)/integer/i;
+    $field =~ s/int\(\d+\)/integer/i;
+    $field =~ s/smallint\(\d+\)/smallint/i;
+    $field =~ s/smallinteger/smallint/i;
+    $field =~ s/tinyint\(\d+\)/tinyint/i;
+    $field =~ s/tinyinteger/tinyint/i;
+    $field =~ s/blob/text/i;
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=0;
+  foreach $index (@$index)
+  {
+    $ext="WITH DISALLOW NULL";
+    if (($index =~ s/primary key/unique index primary_key/i))
+    {
+      $ext="WITH PRIMARY;"
+    }
+    if ($index =~ /^unique.*\(([^\(]*)\)$/i)
+    {
+      $nr++;
+      $index="unique index ${table_name}_$nr ($1)";
+    }
+    $index =~ /^(.*)\s+(\(.*\))$/;
+    push(@queries,"create ${1} on $table_name $2");
+  }
+  return @queries;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $table.$index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#	     Configuration for Sybase
+#############################################################################
+package db_sybase;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "sybase";
+  $self->{'data_source'}	= "DBI:Sybase:database=$database";
+  if (defined($host) && $host ne "")
+  {
+    $self->{'data_source'}	.= ";hostname=$host";
+  }
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "text";
+  $self->{'text'}		= "text";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+  $self->{"vacuum"}		= 1;
+
+  $limits{'max_conditions'}	= 1030; # We get 'Query is too complex'
+  $limits{'max_columns'}	= 250;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 9830;  # Max size with default buffers.
+  $limits{'query_size'}		= 9830; # Max size with default buffers.
+  $limits{'max_index'}		= 64; # Max number of keys
+  $limits{'max_index_parts'}	= 15; # Max segments/key
+  $limits{'max_column_name'}	= 30; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 1; # Can do 'select 1';
+  $limits{'multi_drop'}		= 1; # Drop table can take many tables
+  $limits{'subqueries'}		= 1; # Supports sub-queries.
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can't use group functions in HAVING
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0; # Can use 'GROUP BY 1'
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 0;
+
+  $limits{'group_func_extra_std'} = 0; # Have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Have function mod.
+  $limits{'func_extra_%'}	= 1; # Has % as alias for mod()
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 0; # Has function in
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+  $dbh=$self->connect();
+  $sth = $dbh->prepare('SELECT @@version') or die $DBI::errstr;
+  $version="Sybase (unknown)";
+  if ($sth->execute && (@row = $sth->fetchrow_array))
+  {
+    $version=$row[0];
+  }
+  $sth->finish;
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0 , AutoCommit => 1}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/mediumint/integer/i;
+    $field =~ s/float\(\d+,\d+\)/float/i;
+    $field =~ s/int\(\d+\)/int/i;
+    $field =~ s/double/float/i;
+    $field =~ s/integer\(\d+\)/integer/i;
+    $field =~ s/smallint\(\d+\)/smallint/i;
+    $field =~ s/tinyint\(\d+\)/tinyint/i;
+    $field =~ s/blob/text/i;
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=0;
+  foreach $index (@$index)
+  {
+#    $ext="WITH DISALLOW NULL";
+    if (($index =~ s/primary key/unique index primary_key/i))
+    {
+#      $ext="WITH PRIMARY;"
+    }
+    if ($index =~ /^unique.*\(([^\(]*)\)$/i)
+    {
+      $nr++;
+      $index="unique index ${table_name}_$nr ($1)";
+    }
+    $index =~ /^(.*)\s+(\(.*\))$/;
+    push(@queries,"create ${1} on $table_name $2");
+  }
+  return @queries;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $table.$index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#
+# optimize the tables ....
+#  WARNING (from walrus)! This sub will work only from DBD:sybase
+# driver. Because if we use ODBC we don't know actual database name
+# (but DSN name only)
+sub vacuum
+{
+  my ($self,$full_vacuum,$dbh_ref)=@_;
+  my ($loop_time,$end_time,$dbh);
+
+  if (defined($full_vacuum))
+  {
+    $$dbh_ref->disconnect;  $$dbh_ref= $self->connect();
+  }
+  $dbh=$$dbh_ref;
+  $loop_time=new Benchmark;
+  my (@tables,$sth,$current_table,$current_base);
+  $dbh->do("dump tran $database with truncate_only");
+  $sth=$dbh->prepare("sp_tables" ) or die "prepere";
+  $sth->execute() or die "execute";
+  while (@row = $sth->fetchrow_array()) {
+    $current_table = $row[2];
+    $current_base = $row[0];
+    next if ($current_table =~ /^sys/); 
+    push(@tables,$current_table) if ($database == $current_base);    
+   }
+
+  $sth->finish();
+
+  foreach $table (@tables) {
+#    print "$table: \n";
+    $dbh->do("update statistics $table") or print "Oops!"; 
+  }
+ 
+#  $dbh->do("analyze table ?? compute statistics") || die "Got error: $DBI::errstr when executing 'vacuum'\n";
+  $end_time=new Benchmark;
+  print "Time for book-keeping (1): " .
+  Benchmark::timestr(Benchmark::timediff($end_time, $loop_time),"all") . "\n\n";
+  $dbh->disconnect;  $$dbh_ref= $self->connect();
+}
+
+
+
+
+#############################################################################
+#	                 Definitions for Adabas
+#############################################################################
+
+package db_Adabas;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "Adabas";
+  $self->{'data_source'}	= "DBI:Adabas:$database";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "long";
+  $self->{'text'}		= "long";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+
+  $limits{'max_conditions'}	= 50; # (Actually not a limit)
+  $limits{'max_columns'}	= 254;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 2000; # Limit for blob test-connect
+  $limits{'query_size'}		= 65525; # Max size with default buffers.
+  $limits{'max_index'}		= 16; # Max number of keys
+  $limits{'max_index_parts'}	= 16; # Max segments/key
+  $limits{'max_column_name'} = 32; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'}	= 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 0;
+  $limits{'multi_drop'}		= 0;
+  $limits{'subqueries'}		= 1;
+  $limits{'left_outer_join'}	= 0; # This may be fixed in the query module
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can't use group functions in HAVING
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 1;
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 2; #Have ALTER TABLE t add a int, b int;
+  $limits{'alter_table_dropcol'}= 1;
+
+  $limits{'group_func_extra_std'}	= 0; # Have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Oracle has problem with mod()
+  $limits{'func_extra_%'}	= 0; # Has % as alias for mod()
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 1; # Has function in
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+  $dbh=$self->connect();
+  $sth = $dbh->prepare("SELECT KERNEL FROM VERSIONS") or die $DBI::errstr;
+  $version="Adabas (unknown)";
+  if ($sth->execute && (@row = $sth->fetchrow_array)
+      && $row[0] =~ /([\d\.]+)/)
+  {
+    $version="Adabas $1";
+  }
+  $sth->finish;
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+# If one uses $main::opt_fast then one is allowed to use
+# non standard types to get better speed.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$ind,@keys);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/CHARACTER\s+VARYING/VARCHAR/i;
+    $field =~ s/TINYINT/SMALLINT/i;
+    $field =~ s/MEDIUMINT/INT/i;
+    $field =~ s/SMALLINT\s*\(\d+\)/SMALLINT/i;
+    $field =~ s/INT\s*\(\d+\)/INT/i;
+    $field =~ s/BLOB/LONG/i;
+    $field =~ s/INTEGER\s*\(\d+\)/INTEGER/i;
+    $field =~ s/FLOAT\s*\((\d+),\d+\)/FLOAT\($1\)/i;
+    $field =~ s/DOUBLE/FLOAT\(38\)/i;
+    $field =~ s/DOUBLE\s+PRECISION/FLOAT\(38\)/i;
+    $query.= $field . ',';
+  }
+
+  foreach $ind (@$index)
+  {
+    my @index;
+    if ( $ind =~ /\bKEY\b/i ){
+      push(@keys,"ALTER TABLE $table_name ADD $ind");
+    }else{
+      my @fields = split(' ',$index);
+      my $query="CREATE INDEX $fields[1] ON $table_name $fields[2]";
+      push(@index,$query);
+    }
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query,@keys,@index);
+#print "query:$query\n";
+
+  return @queries;
+}
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  print "insert an ascii file isn't supported by Oracle (?)\n";
+  return 0;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#	     Configuration for IBM DB2
+#############################################################################
+
+package db_db2;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "DB2";
+  $self->{'data_source'}	= "DBI:ODBC:$database";
+  if (defined($host) && $host ne "")
+  {
+    $self->{'data_source'}	.= ":$host";
+  }
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "varchar(255)";
+  $self->{'text'}		= "varchar(255)";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+
+  $limits{'max_conditions'}	= 418; # We get 'Query is too complex'
+  $limits{'max_columns'}	= 500;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 254;  # Max size with default buffers.
+  $limits{'query_size'}		= 254; # Max size with default buffers.
+  $limits{'max_index'}		= 48; # Max number of keys
+  $limits{'max_index_parts'}	= 15; # Max segments/key
+  $limits{'max_column_name'}	= 18; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'}= 1;
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 0; # Can do 'select 1';
+  $limits{'multi_drop'}		= 0; # Drop table can take many tables
+  $limits{'subqueries'}		= 1; # Supports sub-queries.
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can't use group functions in HAVING
+  $limits{'like_with_column'}	= 0; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0; # Can use 'GROUP BY 1'
+  $limits{'alter_table'}	= 1;
+  $limits{'alter_add_multi_col'}= 0;
+  $limits{'alter_table_dropcol'}= 0;
+
+  $limits{'group_func_extra_std'} = 0; # Have group function std().
+
+  $limits{'func_odbc_mod'}	= 1; # Have function mod.
+  $limits{'func_extra_%'}	= 0; # Has % as alias for mod()
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 0; # Has function in
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  return "IBM DB2 5";		#DBI/ODBC can't return the server version
+}
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user, $main::opt_password) ||
+    die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index) = @_;
+  my($query,@queries,$nr);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/mediumint/integer/i;
+    $field =~ s/float\(\d+,\d+\)/float/i;
+    $field =~ s/integer\(\d+\)/integer/i;
+    $field =~ s/int\(\d+\)/integer/i;
+    $field =~ s/tinyint\(\d+\)/smallint/i;
+    $field =~ s/tinyint/smallint/i;
+    $field =~ s/smallint\(\d+\)/smallint/i;
+    $field =~ s/smallinteger/smallint/i;
+    $field =~ s/blob/varchar(256)/i;
+    $query.= $field . ',';
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  push(@queries,$query);
+  $nr=0;
+  foreach $index (@$index)
+  {
+    $ext="WITH DISALLOW NULL";
+    if (($index =~ s/primary key/unique index primary_key/i))
+    {
+      $ext="WITH PRIMARY;"
+    }
+    if ($index =~ /^unique.*\(([^\(]*)\)$/i)
+    {
+      $nr++;
+      $index="unique index ${table_name}_$nr ($1)";
+    }
+    $index =~ /^(.*)\s+(\(.*\))$/;
+    push(@queries,"create ${1} on $table_name $2");
+  }
+  return @queries;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index
+{
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $table.$index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 1;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#	     Configuration for MIMER 
+#############################################################################
+
+package db_Mimer;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "mimer";
+  $self->{'data_source'}	= "DBI:mimer:$database:$host";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "binary varying(15000)";
+  $self->{'text'}		= "character varying(15000)";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+  $self->{'char_null'}          = "cast(NULL as char(1))";
+  $self->{'numeric_null'}       = "cast(NULL as int)";
+
+  $limits{'max_conditions'}	= 9999; # (Actually not a limit)
+  $limits{'max_columns'}	= 252;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 15000; # Max size with default buffers.
+  $limits{'query_size'}		= 1000000; # Max size with default buffers.
+  $limits{'max_index'}		= 32; # Max number of keys
+  $limits{'max_index_parts'}	= 16; # Max segments/key
+  $limits{'max_column_name'}	= 128; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 1; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'} = 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 0; # Cannot do 'select 1';
+  $limits{'multi_drop'}		= 0; # Drop table cannot take many tables
+  $limits{'subqueries'}		= 1; # Supports sub-queries.
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can use group functions in HAVING
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0; # Cannot use 'GROUP BY 1'
+  $limits{'alter_table'}	= 1; # Have ALTER TABLE
+  $limits{'alter_add_multi_col'}= 0; # Have ALTER TABLE t add a int,add b int;
+  $limits{'alter_table_dropcol'}= 1; # Have ALTER TABLE DROP column
+  $limits{'insert_multi_value'} = 0; # Does not have INSERT ... values (1,2),(3,4)
+  $limits{'multi_distinct'}     = 0; # Does not allow select count(distinct a),count(distinct b).. 
+
+  $limits{'group_func_extra_std'} = 0; # Does not have group function std().
+
+  $limits{'func_odbc_mod'}	= 1; # Have function mod.
+  $limits{'func_extra_%'}	= 0; # Does not have % as alias for mod()
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Does not have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 1; # Has function in
+  $limits{'limit'}		= 0; # Does not support the limit attribute
+  $limits{'unique_index'}	= 1; # Unique index works or not
+  $limits{'insert_select'}	= 1;
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 0;
+  $limits{'working_all_fields'} = 1;
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+  $dbh=$self->connect();
+#
+#  Pick up SQLGetInfo option SQL_DBMS_VER (18)
+#
+  $version = $dbh->func(18, GetInfo);
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);  
+  return $version;
+}
+
+#
+# Connection with optional disabling of logging
+#
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+
+  $dbh->do("SET OPTION LOG_OFF=1,UPDATE_LOG=0");
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+# If one uses $main::opt_fast then one is allowed to use
+# non standard types to get better speed.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index,$options) = @_;
+  my($query,@queries,@indexes);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+#    $field =~ s/ decimal/ double(10,2)/i;
+#    $field =~ s/ big_decimal/ double(10,2)/i;
+    $field =~ s/ double/ double precision/i;  
+    $field =~ s/ tinyint\(.*\)/ smallint/i;
+    $field =~ s/ smallint\(.*\)/ smallint/i;
+    $field =~ s/ mediumint/ integer/i;
+    $field =~ s/ float\(.*\)/ float/i;
+#    $field =~ s/ date/ int/i;		# Because of tcp ?
+    $query.= $field . ',';
+  }
+  foreach $index (@$index)
+  {
+    if ( $index =~ /\bINDEX\b/i )
+    {
+      my @fields = split(' ',$index);
+      my $query="CREATE INDEX $fields[1] ON $table_name $fields[2]";
+      push(@indexes,$query);
+    
+    } else {
+      $query.= $index . ',';
+    }
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  $query.=" $options" if (defined($options));
+  push(@queries,$query,@indexes);
+  return @queries;
+}
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  print "insert of an ascii file isn't supported by Mimer\n";
+  return 0;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index {
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 1 if ($DBI::errstr =~ /Table locked by another cursor/);
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#	     Configuration for InterBase
+#############################################################################
+
+package db_interbase;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "interbase";
+  $self->{'data_source'}	= "DBI:InterBase:database=$database;ib_dialect=3";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "blob";
+  $self->{'text'}		= "";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled
+  $self->{'char_null'}          = "";
+  $self->{'numeric_null'}       = "";
+
+  $limits{'max_conditions'}	= 9999; # (Actually not a limit)
+  $limits{'max_columns'}	= 252;	# Max number of columns in table
+  $limits{'max_tables'}		= 65000;	# Should be big enough
+  $limits{'max_text_size'}	= 15000; # Max size with default buffers.
+  $limits{'query_size'}		= 1000000; # Max size with default buffers.
+  $limits{'max_index'}		= 65000; # Max number of keys
+  $limits{'max_index_parts'}	= 8; # Max segments/key
+  $limits{'max_column_name'}	= 128; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 0; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_func_sql_min_str'} = 1; # Can execute MIN() and MAX() on strings
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)
+  $limits{'select_without_from'}= 0; # Cannot do 'select 1';
+  $limits{'multi_drop'}		= 0; # Drop table cannot take many tables
+  $limits{'subqueries'}		= 1; # Supports sub-queries.
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 1; # Can use group functions in HAVING
+  $limits{'like_with_column'}	= 0; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0; # Cannot use 'GROUP BY 1'
+  $limits{'alter_table'}	= 1; # Have ALTER TABLE
+  $limits{'alter_add_multi_col'}= 1; # Have ALTER TABLE t add a int,add b int;
+  $limits{'alter_table_dropcol'}= 1; # Have ALTER TABLE DROP column
+  $limits{'insert_multi_value'} = 0; # Does not have INSERT ... values (1,2),(3,4)
+
+  $limits{'group_func_extra_std'} = 0; # Does not have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Have function mod.
+  $limits{'func_extra_%'}	= 0; # Does not have % as alias for mod()
+  $limits{'func_odbc_floor'}	= 0; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Does not have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 0; # Supports -id
+  $limits{'func_extra_in_num'}	= 0; # Has function in
+  $limits{'limit'}		= 0; # Does not support the limit attribute
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works
+  $limits{'order_by_unused'}	= 1;
+  $limits{'working_all_fields'} = 1;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$version);
+  
+  $version='Interbase ?';
+  
+  $dbh=$self->connect();
+  eval { $version =   $dbh->func('version','ib_database_info')->{'version'}; }; 
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+#
+# Connection with optional disabling of logging
+#
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0, AutoCommit => 1}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+# If one uses $main::opt_fast then one is allowed to use
+# non standard types to get better speed.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index,$options) = @_;
+  my($query,@queries,@keys,@indexes);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+#    $field =~ s/ big_decimal/ decimal/i;
+    $field =~ s/ double/ double precision/i;
+    $field =~ s/ tinyint/ smallint/i;
+    $field =~ s/ mediumint/ integer/i;
+    $field =~ s/\bint\b/integer/i;
+    $field =~ s/ float\(\d,\d\)/ float/i;
+    $field =~ s/ smallint\(\d\)/ smallint/i;
+    $field =~ s/ integer\(\d\)/ integer/i;
+    $query.= $field . ',';
+  }
+  foreach $ind (@$index)
+  {
+    if ( $ind =~ /(\bKEY\b)|(\bUNIQUE\b)/i ){
+      push(@keys,"ALTER TABLE $table_name ADD $ind");
+    }else{
+      my @fields = split(' ',$ind);
+      my $query="CREATE INDEX $fields[1] ON $table_name $fields[2]";
+      push(@indexes,$query);
+    }
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  $query.=" $options" if (defined($options));
+  push(@queries,$query,@keys,@indexes);
+  return @queries;
+}
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  print "insert of an ascii file isn't supported by InterBase\n";
+  return 0;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index {
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 1 if ($DBI::errstr =~ /Table locked by another cursor/);
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 1;
+}
+
+sub reconnect_on_errors
+{
+  return 1;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#	     Configuration for FrontBase 
+#############################################################################
+
+package db_FrontBase;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "FrontBase";
+  $self->{'data_source'}	= "DBI:FB:dbname=$database;host=$host";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "varchar(8000000)";
+  $self->{'text'}		= "varchar(8000000)";
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= ' restrict';
+  $self->{'transactions'}	= 1; # Transactions enabled
+  $self->{'error_on_execute_means_zero_rows'}=1;
+
+  $limits{'max_conditions'}	= 5427; # (Actually not a limit)
+  # The following should be 8192, but is smaller because Frontbase crashes..
+  $limits{'max_columns'}	= 150;	# Max number of columns in table
+  $limits{'max_tables'}		= 5000;	# 10000 crashed FrontBase
+  $limits{'max_text_size'}	= 65000; # Max size with default buffers.
+  $limits{'query_size'}		= 8000000; # Max size with default buffers.
+  $limits{'max_index'}		= 38; # Max number of keys
+  $limits{'max_index_parts'}	= 20; # Max segments/key
+  $limits{'max_column_name'}	= 128; # max table and column name
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables
+  $limits{'load_data_infile'}	= 1; # Has load data infile
+  $limits{'lock_tables'}	= 0; # Has lock tables
+  $limits{'functions'}		= 1; # Has simple functions (+/-)
+  $limits{'group_functions'}	= 1; # Have group functions
+  $limits{'group_distinct_functions'}= 0; # Have count(distinct)
+  $limits{'select_without_from'}= 0;
+  $limits{'multi_drop'}		= 0; # Drop table cannot take many tables
+  $limits{'subqueries'}		= 1; # Supports sub-queries.
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING
+  $limits{'having_with_group'}	= 0; # Can use group functions in HAVING
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1'
+  $limits{'group_by_position'}  = 0; # Use of 'GROUP BY 1'
+  $limits{'alter_table'}	= 1; # Have ALTER TABLE
+  $limits{'alter_add_multi_col'}= 0; # Have ALTER TABLE t add a int,add b int;
+  $limits{'alter_table_dropcol'}= 0; # Have ALTER TABLE DROP column
+  $limits{'insert_multi_value'} = 1;
+
+  $limits{'group_func_extra_std'} = 0; # Does not have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Have function mod.
+  $limits{'func_extra_%'}	= 0; # Does not have % as alias for mod()
+  $limits{'func_odbc_floor'}	= 0; # Has func_odbc_floor function
+  $limits{'func_extra_if'}	= 0; # Does not have function if.
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement.
+  $limits{'NEG'}		= 1; # Supports -id
+  $limits{'func_extra_in_num'}	= 0; # Has function in
+  $limits{'limit'}		= 0; # Does not support the limit attribute
+  $limits{'insert_select'}	= 0;
+  $limits{'order_by_unused'}	= 0;
+
+  # We don't get an error for duplicate row in 'test-insert'
+  $limits{'unique_index'}	= 0; # Unique index works or not
+  # We can't use a blob as a normal string (we got a wierd error)
+  $limits{'working_blobs'}	= 0;
+  # 'select min(region),max(region) from bench1' kills the server after a while
+  $limits{'group_func_sql_min_str'} = 0;
+  # If you do select f1,f2,f3...f200 from table, Frontbase dies.
+  $limits{'working_all_fields'} = 0;
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+#  $dbh=$self->connect();
+#
+#  Pick up SQLGetInfo option SQL_DBMS_VER (18)
+#
+  #$version = $dbh->func(18, GetInfo);
+  $version="FrontBase 3.3";
+#  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+#
+# Connection with optional disabling of logging
+#
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, 
+		    $main::opt_user,
+		    $main::opt_password,
+		    { PrintError => 0 , 
+		      'fb_host'=>$main::opt_host
+		    }) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+  $db->{AutoCommit}=1;
+  # $dbh->do("SET OPTION LOG_OFF=1,UPDATE_LOG=0");
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+# If one uses $main::opt_fast then one is allowed to use
+# non standard types to get better speed.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index,$options) = @_;
+  my($query,@queries,@indexes,@keys);
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/ blob/ varchar(32000)/i;
+    $field =~ s/ big_decimal/ float/i;
+    $field =~ s/ double/ float/i;
+    $field =~ s/ tinyint/ smallint/i;
+    $field =~ s/ mediumint/ int/i;
+    $field =~ s/ integer/ int/i;
+    $field =~ s/ float\(\d,\d\)/ float/i;
+    $field =~ s/ smallint\(\d\)/ smallint/i;
+    $field =~ s/ int\(\d\)/ int/i;
+    $query.= $field . ',';
+  }
+  foreach $ind (@$index)
+  {
+#    my @index;
+    if ( $ind =~ /(\bKEY\b)|(\bUNIQUE\b)/i ){
+      push(@keys,"ALTER TABLE $table_name ADD $ind");
+    }else{
+      my @fields = split(' ',$ind);
+      my $query="CREATE INDEX $fields[1] ON $table_name $fields[2]";
+      push(@indexes,$query);
+    }
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  $query.=" $options" if (defined($options));
+  push(@queries,$query,@keys,@indexes);
+  return @queries;
+}
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  print "insert of an ascii file isn't supported by InterBase\n";
+  return 0;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index {
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0 if ($DBI::errstr =~ /No raw data handle/);
+  return 1;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 1;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+#############################################################################
+#	     Configuration for SAPDB 
+#############################################################################
+
+package db_sapdb;
+
+sub new
+{
+  my ($type,$host,$database)= @_;
+  my $self= {};
+  my %limits;
+  bless $self;
+
+  $self->{'cmp_name'}		= "sapdb";
+  $self->{'data_source'}	= "DBI:SAP_DB:$database";
+  $self->{'limits'}		= \%limits;
+  $self->{'blob'}		= "LONG"; # *
+  $self->{'text'}		= "LONG"; # *
+  $self->{'double_quotes'}	= 1; # Can handle:  'Walker''s'
+  $self->{'drop_attr'}		= "";
+  $self->{'transactions'}	= 1; # Transactions enabled *
+  $self->{'char_null'}          = "";
+  $self->{'numeric_null'}       = "";
+
+  $limits{'max_conditions'}	= 9999; # (Actually not a limit) *
+  $limits{'max_columns'}	= 1023;	# Max number of columns in table *
+  $limits{'max_tables'}		= 65000;	# Should be big enough * unlimited actually
+  $limits{'max_text_size'}	= 15000; # Max size with default buffers. 
+  $limits{'query_size'}		= 64*1024; # Max size with default buffers. *64 kb by default. May be set by system variable 
+  $limits{'max_index'}		= 510; # Max number of keys *
+  $limits{'max_index_parts'}	= 16; # Max segments/key *
+  $limits{'max_column_name'}	= 32; # max table and column name * 
+
+  $limits{'join_optimizer'}	= 1; # Can optimize FROM tables *
+  $limits{'load_data_infile'}	= 0; # Has load data infile *
+  $limits{'lock_tables'}	= 1; # Has lock tables 
+  $limits{'functions'}		= 1; # Has simple functions (+/-) *
+  $limits{'group_functions'}	= 1; # Have group functions *
+  $limits{'group_func_sql_min_str'} = 1; # Can execute MIN() and MAX() on strings *
+  $limits{'group_distinct_functions'}= 1; # Have count(distinct)  *
+  $limits{'select_without_from'}= 0; # Cannot do 'select 1';  *
+  $limits{'multi_drop'}		= 0; # Drop table cannot take many tables *
+  $limits{'subqueries'}		= 1; # Supports sub-queries. *
+  $limits{'left_outer_join'}	= 1; # Supports left outer joins *
+  $limits{'table_wildcard'}	= 1; # Has SELECT table_name.*
+  $limits{'having_with_alias'}  = 0; # Can use aliases in HAVING *
+  $limits{'having_with_group'}	= 1; # Can use group functions in HAVING *
+  $limits{'like_with_column'}	= 1; # Can use column1 LIKE column2 *
+  $limits{'order_by_position'}  = 1; # Can use 'ORDER BY 1' *
+  $limits{'group_by_position'}  = 0; # Cannot use 'GROUP BY 1' *
+  $limits{'alter_table'}	= 1; # Have ALTER TABLE *
+  $limits{'alter_add_multi_col'}= 1; # Have ALTER TABLE t add a int,add b int; *
+  $limits{'alter_table_dropcol'}= 1; # Have ALTER TABLE DROP column  *
+  $limits{'insert_multi_value'} = 0; # INSERT ... values (1,2),(3,4) *
+
+  $limits{'group_func_extra_std'} = 0; # Does not have group function std().
+
+  $limits{'func_odbc_mod'}	= 0; # Have function mod. *
+  $limits{'func_extra_%'}	= 0; # Does not have % as alias for mod() *
+  $limits{'func_odbc_floor'}	= 1; # Has func_odbc_floor function *
+  $limits{'func_extra_if'}	= 0; # Does not have function if. *
+  $limits{'column_alias'}	= 1; # Alias for fields in select statement. *
+  $limits{'NEG'}		= 1; # Supports -id *
+  $limits{'func_extra_in_num'}	= 0; # Has function in *
+  $limits{'limit'}		= 0; # Does not support the limit attribute *
+  $limits{'working_blobs'}	= 1; # If big varchar/blobs works *
+  $limits{'order_by_unused'}	= 1; # 
+  $limits{'working_all_fields'} = 1; #
+  $limits{'multi_distinct'}     = 1; # allows select count(distinct a),count(distinct b).. 
+
+
+  return $self;
+}
+
+#
+# Get the version number of the database
+#
+
+sub version
+{
+  my ($self)=@_;
+  my ($dbh,$sth,$version,@row);
+
+  $dbh=$self->connect();
+  $sth = $dbh->prepare("SELECT KERNEL FROM VERSIONS") or die $DBI::errstr;
+  $version="SAP DB (unknown)";
+  if ($sth->execute && (@row = $sth->fetchrow_array)
+      && $row[0] =~ /([\d\.]+)/)
+  {
+    $version=$row[0];
+    $version =~ s/KERNEL/SAP DB/i; 
+  }
+  $sth->finish;
+  $dbh->disconnect;
+  $version .= "/ODBC" if ($self->{'data_source'} =~ /:ODBC:/);
+  return $version;
+}
+
+#
+# Connection with optional disabling of logging
+#
+
+sub connect
+{
+  my ($self)=@_;
+  my ($dbh);
+  $dbh=DBI->connect($self->{'data_source'}, $main::opt_user,
+		    $main::opt_password,{ PrintError => 0, AutoCommit => 1}) ||
+		      die "Got error: '$DBI::errstr' when connecting to " . $self->{'data_source'} ." with user: '$main::opt_user' password: '$main::opt_password'\n";
+
+  return $dbh;
+}
+
+#
+# Returns a list of statements to create a table
+# The field types are in ANSI SQL format.
+#
+
+sub create
+{
+  my($self,$table_name,$fields,$index,$options) = @_;
+  my($query,@queries,$nr);
+  my @index;
+  my @keys;
+
+  $query="create table $table_name (";
+  foreach $field (@$fields)
+  {
+    $field =~ s/\bmediumint\b/int/i;
+    $field =~ s/\btinyint\b/int/i;
+    $field =~ s/ int\(\d\)/ int/i;
+    $field =~ s/BLOB/LONG/i;
+    $field =~ s/INTEGER\s*\(\d+\)/INTEGER/i;
+    $field =~ s/SMALLINT\s*\(\d+\)/SMALLINT/i;
+    $field =~ s/FLOAT\s*\((\d+),\d+\)/FLOAT\($1\)/i;
+    $field =~ s/DOUBLE/FLOAT\(38\)/i;
+    $field =~ s/DOUBLE\s+PRECISION/FLOAT\(38\)/i;
+    $query.= $field . ',';
+  }
+  $nr=0;
+  foreach $ind (@$index)
+  {
+    if ( $ind =~ /\bKEY\b/i ){
+      push(@keys,"ALTER TABLE $table_name ADD $ind");
+    } elsif ($ind =~ /^unique.*\(([^\(]*)\)$/i)  {
+      $nr++;
+      my $query="create unique index ${table_name}_$nr on $table_name ($1)";
+      push(@index,$query);
+    }else{
+      my @fields = split(' ',$ind);
+      my $query="CREATE INDEX $fields[1] ON $table_name $fields[2]";
+      push(@index,$query);
+    }
+  }
+  substr($query,-1)=")";		# Remove last ',';
+  $query.=" $options" if (defined($options));
+  push(@queries,$query);
+  push(@queries,@keys);
+  push(@queries,@index);
+  return @queries;
+}
+
+sub insert_file {
+  my($self,$dbname, $file) = @_;
+  print "insert of an ascii file isn't supported by SAPDB\n";
+  return 0;
+}
+
+#
+# Do any conversions to the ANSI SQL query so that the database can handle it
+#
+
+sub query {
+  my($self,$sql) = @_;
+  return $sql;
+}
+
+sub drop_index {
+  my ($self,$table,$index) = @_;
+  return "DROP INDEX $index";
+}
+
+#
+# Abort if the server has crashed
+# return: 0 if ok
+#	  1 question should be retried
+#
+
+sub abort_if_fatal_error
+{
+  return 0;
+}
+
+sub small_rollback_segment
+{
+  return 0;
+}
+
+sub reconnect_on_errors
+{
+  return 0;
+}
+
+sub fix_for_insert
+{
+  my ($self,$cmd) = @_;
+  return $cmd;
+}
+
+1;