recno.t

介绍：MySQL是比较出名的数据库软件

    ok 139, $db->db_get(3, $value) == 0 && $value eq "XYZXYZ" ;
    ok 140, $db->db_get(4, $value) == 0 && $value eq "KLMTU" ;
}

{
    # partial
    # check works via tied array 

    my $lex = new LexFile $Dfile ;
    my @array ;
    my $value ;
    ok 141, my $db = tie @array, 'BerkeleyDB::Recno', -Filename => $Dfile,
                                      	        -Flags    => DB_CREATE ;

    # create some data
    my @data =  (
		"",
		"boat",
		"house",
		"sea",
		) ;

    my $i ;
    for ($i = 1 ; $i < @data ; ++$i) {
	$array[$i] = $data[$i] ;
    }


    # do a partial get
    $db->partial_set(0,2) ;
    ok 142, $array[1] eq "bo" ;
    ok 143, $array[2] eq "ho" ;
    ok 144, $array[3]  eq "se" ;

    # do a partial get, off end of data
    $db->partial_set(3,2) ;
    ok 145, $array[1] eq "t" ;
    ok 146, $array[2] eq "se" ;
    ok 147, $array[3] eq "" ;

    # switch of partial mode
    $db->partial_clear() ;
    ok 148, $array[1] eq "boat" ;
    ok 149, $array[2] eq "house" ;
    ok 150, $array[3] eq "sea" ;

    # now partial put
    $db->partial_set(0,2) ;
    ok 151, $array[1] = "" ;
    ok 152, $array[2] = "AB" ;
    ok 153, $array[3] = "XYZ" ;
    ok 154, $array[4] = "KLM" ;

    $db->partial_clear() ;
    ok 155, $array[1] eq "at" ;
    ok 156, $array[2] eq "ABuse" ;
    ok 157, $array[3] eq "XYZa" ;
    ok 158, $array[4] eq "KLM" ;

    # now partial put
    $db->partial_set(3,2) ;
    ok 159, $array[1] = "PPP" ;
    ok 160, $array[2] = "Q" ;
    ok 161, $array[3] = "XYZ" ;
    ok 162, $array[4] = "TU" ;

    $db->partial_clear() ;
    ok 163, $array[1] eq "at\0PPP" ;
    ok 164, $array[2] eq "ABuQ" ;
    ok 165, $array[3] eq "XYZXYZ" ;
    ok 166, $array[4] eq "KLMTU" ;
}

{
    # transaction

    my $lex = new LexFile $Dfile ;
    my @array ;
    my $value ;

    my $home = "./fred" ;
    rmtree $home if -e $home ;
    ok 167, mkdir($home, 0777) ;
    ok 168, my $env = new BerkeleyDB::Env -Home => $home,
				     -Flags => DB_CREATE|DB_INIT_TXN|
					  	DB_INIT_MPOOL|DB_INIT_LOCK ;
    ok 169, my $txn = $env->txn_begin() ;
    ok 170, my $db1 = tie @array, 'BerkeleyDB::Recno', 
				-Filename => $Dfile,
				-ArrayBase => 0,
                      		-Flags    =>  DB_CREATE ,
		        	-Env 	  => $env,
		        	-Txn	  => $txn ;

    
    # create some data
    my @data =  (
		"boat",
		"house",
		"sea",
		) ;

    my $ret = 0 ;
    my $i ;
    for ($i = 0 ; $i < @data ; ++$i) {
        $ret += $db1->db_put($i, $data[$i]) ;
    }
    ok 171, $ret == 0 ;

    # should be able to see all the records

    ok 172, my $cursor = $db1->db_cursor() ;
    my ($k, $v) = (0, "") ;
    my $count = 0 ;
    # sequence forwards
    while ($cursor->c_get($k, $v, DB_NEXT) == 0) {
        ++ $count ;
    }
    ok 173, $count == 3 ;
    undef $cursor ;

    # now abort the transaction
    ok 174, $txn->txn_abort() == 0 ;

    # there shouldn't be any records in the database
    $count = 0 ;
    # sequence forwards
    ok 175, $cursor = $db1->db_cursor() ;
    while ($cursor->c_get($k, $v, DB_NEXT) == 0) {
        ++ $count ;
    }
    ok 176, $count == 0 ;

    undef $txn ;
    undef $cursor ;
    undef $db1 ;
    undef $env ;
    untie @array ;
    rmtree $home ;
}


{
    # db_stat

    my $lex = new LexFile $Dfile ;
    my $recs = ($BerkeleyDB::db_version >= 3.1 ? "bt_ndata" : "bt_nrecs") ;
    my @array ;
    my ($k, $v) ;
    ok 177, my $db = new BerkeleyDB::Recno -Filename 	=> $Dfile, 
				     	   -Flags    	=> DB_CREATE,
					   -Pagesize	=> 4 * 1024,
					;

    my $ref = $db->db_stat() ; 
    ok 178, $ref->{$recs} == 0;
    ok 179, $ref->{'bt_pagesize'} == 4 * 1024;

    # create some data
    my @data =  (
		2,
		"house",
		"sea",
		) ;

    my $ret = 0 ;
    my $i ;
    for ($i = $db->ArrayOffset ; @data ; ++$i) {
        $ret += $db->db_put($i, shift @data) ;
    }
    ok 180, $ret == 0 ;

    $ref = $db->db_stat() ; 
    ok 181, $ref->{$recs} == 3;
}

{
   # sub-class test

   package Another ;

   use strict ;

   open(FILE, ">SubDB.pm") or die "Cannot open SubDB.pm: $!\n" ;
   print FILE <<'EOM' ;

   package SubDB ;

   use strict ;
   use vars qw( @ISA @EXPORT) ;

   require Exporter ;
   use BerkeleyDB;
   @ISA=qw(BerkeleyDB::Recno);
   @EXPORT = @BerkeleyDB::EXPORT ;

   sub db_put { 
	my $self = shift ;
        my $key = shift ;
        my $value = shift ;
        $self->SUPER::db_put($key, $value * 3) ;
   }

   sub db_get { 
	my $self = shift ;
        $self->SUPER::db_get($_[0], $_[1]) ;
	$_[1] -= 2 ;
   }

   sub A_new_method
   {
	my $self = shift ;
        my $key = shift ;
        my $value = $self->FETCH($key) ;
	return "[[$value]]" ;
   }

   1 ;
EOM

    close FILE ;

    BEGIN { push @INC, '.'; }    
    eval 'use SubDB ; ';
    main::ok 182, $@ eq "" ;
    my @h ;
    my $X ;
    eval '
	$X = tie(@h, "SubDB", -Filename => "dbbtree.tmp", 
			-Flags => DB_CREATE,
			-Mode => 0640 );
	' ;

    main::ok 183, $@ eq "" ;

    my $ret = eval '$h[1] = 3 ; return $h[1] ' ;
    main::ok 184, $@ eq "" ;
    main::ok 185, $ret == 7 ;

    my $value = 0;
    $ret = eval '$X->db_put(1, 4) ; $X->db_get(1, $value) ; return $value' ;
    main::ok 186, $@ eq "" ;
    main::ok 187, $ret == 10 ;

    $ret = eval ' DB_NEXT eq main::DB_NEXT ' ;
    main::ok 188, $@ eq ""  ;
    main::ok 189, $ret == 1 ;

    $ret = eval '$X->A_new_method(1) ' ;
    main::ok 190, $@ eq "" ;
    main::ok 191, $ret eq "[[10]]" ;

    unlink "SubDB.pm", "dbbtree.tmp" ;

}

{
    # variable length records, DB_DELIMETER -- defaults to \n

    my $lex = new LexFile $Dfile, $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 192, tie @array, 'BerkeleyDB::Recno', -Filename  => $Dfile,
						-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ,
						-Source	=> $Dfile2 ;
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 193, $x eq "abc\ndef\n\nghi\n" ;
}

{
    # variable length records, change DB_DELIMETER

    my $lex = new LexFile $Dfile, $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 194, tie @array, 'BerkeleyDB::Recno', -Filename  => $Dfile,
						-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ,
						-Source	=> $Dfile2 ,
						-Delim	=> "-";
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 195, $x eq "abc-def--ghi-";
}

{
    # fixed length records, default DB_PAD

    my $lex = new LexFile $Dfile, $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 196, tie @array, 'BerkeleyDB::Recno', -Filename  => $Dfile,
						-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ,
						-Len 	=> 5,
						-Source	=> $Dfile2 ;
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 197, $x eq "abc  def       ghi  " ;
}

{
    # fixed length records, change Pad

    my $lex = new LexFile $Dfile, $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 198, tie @array, 'BerkeleyDB::Recno', -Filename  => $Dfile,
						-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ,
						-Len	=> 5,
						-Pad	=> "-",
						-Source	=> $Dfile2 ;
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 199, $x eq "abc--def-------ghi--" ;
}

{
    # DB_RENUMBER

    my $lex = new LexFile $Dfile;
    my @array ;
    my $value ;
    ok 200, my $db = tie @array, 'BerkeleyDB::Recno', -Filename  => $Dfile,
				    	    	-Property => DB_RENUMBER,
						-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ;
    # create a few records
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;

    ok 201, my ($length, $joined) = joiner($db, "|") ;
    ok 202, $length == 3 ;
    ok 203, $joined eq "abc|def|ghi";

    ok 204, $db->db_del(1) == 0 ;
    ok 205, ($length, $joined) = joiner($db, "|") ;
    ok 206, $length == 2 ;
    ok 207, $joined eq "abc|ghi";

    undef $db ;
    untie @array ;

}

{
    # DB_APPEND

    my $lex = new LexFile $Dfile;
    my @array ;
    my $value ;
    ok 208, my $db = tie @array, 'BerkeleyDB::Recno', 
					-Filename  => $Dfile,
                                       	-Flags     => DB_CREATE ;

    # create a few records
    $array[1] = "def" ;
    $array[3] = "ghi" ;

    my $k = 0 ;
    ok 209, $db->db_put($k, "fred", DB_APPEND) == 0 ;
    ok 210, $k == 4 ;

    undef $db ;
    untie @array ;
}

{
    # in-memory Btree with an associated text file

    my $lex = new LexFile $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 211, tie @array, 'BerkeleyDB::Recno',    -Source => $Dfile2 ,
						-ArrayBase => 0,
				    	    	-Property => DB_RENUMBER,
                                      	       	-Flags  => DB_CREATE ;
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 212, $x eq "abc\ndef\n\nghi\n" ;
}

{
    # in-memory, variable length records, change DB_DELIMETER

    my $lex = new LexFile $Dfile, $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 213, tie @array, 'BerkeleyDB::Recno', 
						-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ,
						-Source	=> $Dfile2 ,
				    	    	-Property => DB_RENUMBER,
						-Delim	=> "-";
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 214, $x eq "abc-def--ghi-";
}

{
    # in-memory, fixed length records, default DB_PAD

    my $lex = new LexFile $Dfile, $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 215, tie @array, 'BerkeleyDB::Recno', 	-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ,
				    	    	-Property => DB_RENUMBER,
						-Len 	=> 5,
						-Source	=> $Dfile2 ;
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 216, $x eq "abc  def       ghi  " ;
}

{
    # in-memory, fixed length records, change Pad

    my $lex = new LexFile $Dfile, $Dfile2 ;
    touch $Dfile2 ;
    my @array ;
    my $value ;
    ok 217, tie @array, 'BerkeleyDB::Recno', 
						-ArrayBase => 0,
                                      	       	-Flags  => DB_CREATE ,
				    	    	-Property => DB_RENUMBER,
						-Len	=> 5,
						-Pad	=> "-",
						-Source	=> $Dfile2 ;
    $array[0] = "abc" ;
    $array[1] = "def" ;
    $array[3] = "ghi" ;
    untie @array ;

    my $x = docat($Dfile2) ;
    ok 218, $x eq "abc--def-------ghi--" ;
}

__END__


# TODO
#
# DB_DELIMETER DB_FIXEDLEN DB_PAD DB_SNAPSHOT with partial records