Description:
------------
dba_open DB4 DB_HASH format can not be choosen to create a database


dba_open when used with the "driver" db4 defaults to btree but hash is also needed. DB_HASH is not defined and isn't passed when defined to the creation environment.

example showing DB_HASH not defined

<?php
 echo (defined('DB_HASH') ? 1 : 0);
?>

there are 2 types of database structures, hash and btree.
db.h
typedef enum {
	DB_BTREE=1,
	DB_HASH=2,
	DB_RECNO=3,
	DB_QUEUE=4,
	DB_UNKNOWN=5
} DBTYPE;


is from the source files...

http://download.oracle.com/berkeley-db/db-4.7.25.NC.tar.gz
db-4.7.25.NC/build_brew/db.h

by default php uses btree to create but hash is needed too. there is no way to change the flags to use hash.

http://us3.php.net/manual/en/function.dba-open.php
resource dba_open  ( string $path  , string $mode  [, string $handler [, mixed $...  ]] )

php-5.2.9/dba_db4.c line 74-76
	type = info->mode == DBA_READER ? DB_UNKNOWN :
		info->mode == DBA_TRUNC ? DB_BTREE :
		s ? DB_BTREE : DB_UNKNOWN;

php-5.2.9/dba_db4.c line 100 - 104
#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
			(err=dbp->open(dbp, 0, info->path, NULL, type, gmode, filemode)) == 0) {
#else
			(err=dbp->open(dbp, info->path, NULL, type, gmode, filemode)) == 0)
{
#endif

http://www.oracle.com/technology/documentation/berkeley-db/db/ref/upgrade.4.1/fop.html

if ((ret = dbp->open(dbp, "file", NULL, DB_BTREE, DB_CREATE, 0664)) != 0) {
	(void)dbp->close(dbp);
	goto err_handler;
}

(btree example, hash would be DB_HASH)

Reproduce code:
---------------
<?php
 echo (defined('DB_HASH') ? 1 : 0);
?>


Expected result:
----------------
1 and databases to be created in hash format

Actual result:
--------------
0 and database format is only btree with no way to change to hash