NAME DBD::Spatialite - Self-contained Geo RDBMS in a DBI Driver SYNOPSIS use DBI; my $dbh = DBI->connect("dbi:SQLite:dbname=$dbfile","",""); DESCRIPTION SQLite is a public domain file-based relational database engine that you can find at . DBD::Spatialite is a Perl DBI driver for SQLite, that includes the entire thing in the distribution. So in order to get a fast transaction capable RDBMS working for your perl project you simply have to install this module, and nothing else. SQLite supports the following features: Implements a large subset of SQL92 See for details. A complete DB in a single disk file Everything for your database is stored in a single disk file, making it easier to move things around than with DBD::CSV. Atomic commit and rollback Yes, DBD::Spatialite is small and light, but it supports full transactions! Extensible User-defined aggregate or regular functions can be registered with the SQL parser. There's lots more to it, so please refer to the docs on the SQLite web page, listed above, for SQL details. Also refer to DBI for details on how to use DBI itself. The API works like every DBI module does. However, currently many statement attributes are not implemented or are limited by the typeless nature of the SQLite database. NOTABLE DIFFERENCES FROM OTHER DRIVERS Database Name Is A File Name SQLite creates a file per a database. You should pass the "path" of the database file (with or without a parent directory) in the DBI connection string (as a database "name"): my $dbh = DBI->connect("dbi:SQLite:dbname=$dbfile","",""); The file is opened in read/write mode, and will be created if it does not exist yet. Although the database is stored in a single file, the directory containing the database file must be writable by SQLite because the library will create several temporary files there. If the filename $dbfile is ":memory:", then a private, temporary in-memory database is created for the connection. This in-memory database will vanish when the database connection is closed. It is handy for your library tests. Note that future versions of SQLite might make use of additional special filenames that begin with the ":" character. It is recommended that when a database filename actually does begin with a ":" character you should prefix the filename with a pathname such as "./" to avoid ambiguity. If the filename $dbfile is an empty string, then a private, temporary on-disk database will be created. This private database will be automatically deleted as soon as the database connection is closed. Accessing A Database With Other Tools To access the database from the command line, try using "dbish" which comes with the DBI::Shell module. Just type: dbish dbi:SQLite:foo.db On the command line to access the file foo.db. Alternatively you can install SQLite from the link above without conflicting with DBD::Spatialite and use the supplied "sqlite3" command line tool. Blobs As of version 1.11, blobs should "just work" in SQLite as text columns. However this will cause the data to be treated as a string, so SQL statements such as length(x) will return the length of the column as a NUL terminated string, rather than the size of the blob in bytes. In order to store natively as a BLOB use the following code: use DBI qw(:sql_types); my $dbh = DBI->connect("dbi:SQLite:dbfile","",""); my $blob = `cat foo.jpg`; my $sth = $dbh->prepare("INSERT INTO mytable VALUES (1, ?)"); $sth->bind_param(1, $blob, SQL_BLOB); $sth->execute(); And then retrieval just works: $sth = $dbh->prepare("SELECT * FROM mytable WHERE id = 1"); $sth->execute(); my $row = $sth->fetch; my $blobo = $row->[1]; # now $blobo == $blob Functions And Bind Parameters As of this writing, a SQL that compares a return value of a function with a numeric bind value like this doesn't work as you might expect. my $sth = $dbh->prepare(q{ SELECT bar FROM foo GROUP BY bar HAVING count(*) > ?; }); $sth->execute(5); This is because DBD::Spatialite assumes that all the bind values are text (and should be quoted) by default. Thus the above statement becomes like this while executing: SELECT bar FROM foo GROUP BY bar HAVING count(*) > "5"; There are two workarounds for this. Use bind_param() explicitly As shown above in the "BLOB" section, you can always use "bind_param()" to tell the type of a bind value. use DBI qw(:sql_types); # Don't forget this my $sth = $dbh->prepare(q{ SELECT bar FROM foo GROUP BY bar HAVING count(*) > ?; }); $sth->bind_param(1, 5, SQL_INTEGER); $sth->execute(); Add zero to make it a number This is somewhat weird, but works anyway. my $sth = $dbh->prepare(q{ SELECT bar FROM foo GROUP BY bar HAVING count(*) > (? + 0); }); $sth->execute(5); Foreign Keys BE PREPARED! WOLVES APPROACH!! SQLite has started supporting foreign key constraints since 3.6.19 (released on Oct 14, 2009; bundled with DBD::Spatialite 1.26_05). To be exact, SQLite has long been able to parse a schema with foreign keys, but the constraints has not been enforced. Now you can issue a pragma actually to enable this feature and enforce the constraints. To do this, issue the following pragma (see below), preferably as soon as you connect to a database and you're not in a transaction: $dbh->do("PRAGMA foreign_keys = ON"); And you can explicitly disable the feature whenever you like by turning the pragma off: $dbh->do("PRAGMA foreign_keys = OFF"); As of this writing, this feature is disabled by default by the sqlite team, and by us, to secure backward compatibility, as this feature may break your applications, and actually broke some for us. If you have used a schema with foreign key constraints but haven't cared them much and supposed they're always ignored for SQLite, be prepared, and please do extensive testing to ensure that your applications will continue to work when the foreign keys support is enabled by default. It is very likely that the sqlite team will turn it default-on in the future, and we plan to do it NO LATER THAN they do so. See for details. Pragma SQLite has a set of "Pragma"s to modifiy its operation or to query for its internal data. These are specific to SQLite and are not likely to work with other DBD libraries, but you may find some of these are quite useful. DBD::Spatialite actually sets some (like "show_datatypes") for you when you connect to a database. See for details. Transactions DBI/DBD::Spatialite's transactions may be a bit confusing. They behave differently according to the status of the "AutoCommit" flag: When the AutoCommit flag is on You're supposed to always use the auto-commit mode, except you explicitly begin a transaction, and when the transaction ended, you're supposed to go back to the auto-commit mode. To begin a transaction, call "begin_work" method, or issue a "BEGIN" statement. To end it, call "commit/rollback" methods, or issue the corresponding statements. $dbh->{AutoCommit} = 1; $dbh->begin_work; # or $dbh->do('BEGIN TRANSACTION'); # $dbh->{AutoCommit} is turned off temporarily during a transaction; $dbh->commit; # or $dbh->do('COMMIT'); # $dbh->{AutoCommit} is turned on again; When the AutoCommit flag is off You're supposed to always use the transactinal mode, until you explicitly turn on the AutoCommit flag. You can explicitly issue a "BEGIN" statement (only when an actual transaction has not begun yet) but you're not allowed to call "begin_work" method (if you don't issue a "BEGIN", it will be issued internally). You can commit or roll it back freely. Another transaction will automatically begins if you execute another statement. $dbh->{AutoCommit} = 0; # $dbh->do('BEGIN TRANSACTION') is not necessary, but possible ... $dbh->commit; # or $dbh->do('COMMIT'); # $dbh->{AutoCommit} stays intact; $dbh->{AutoCommit} = 1; # ends the transactional mode This "AutoCommit" mode is independent from the autocommit mode of the internal SQLite library, which always begins by a "BEGIN" statement, and ends by a "COMMIT" or a . Performance SQLite is fast, very fast. Matt processed my 72MB log file with it, inserting the data (400,000+ rows) by using transactions and only committing every 1000 rows (otherwise the insertion is quite slow), and then performing queries on the data. Queries like count(*) and avg(bytes) took fractions of a second to return, but what surprised him most of all was: SELECT url, count(*) as count FROM access_log GROUP BY url ORDER BY count desc LIMIT 20 To discover the top 20 hit URLs on the site (), and it returned within 2 seconds. He was seriously considering switching his log analysis code to use this little speed demon! Oh yeah, and that was with no indexes on the table, on a 400MHz PIII. For best performance be sure to tune your hdparm settings if you are using linux. Also you might want to set: PRAGMA default_synchronous = OFF Which will prevent sqlite from doing fsync's when writing (which slows down non-transactional writes significantly) at the expense of some peace of mind. Also try playing with the cache_size pragma. The memory usage of SQLite can also be tuned using the cache_size pragma. $dbh->do("PRAGMA cache_size = 800000"); The above will allocate 800M for DB cache; the default is 2M. Your sweet spot probably lies somewhere in between. DRIVER PRIVATE ATTRIBUTES Database Handle Attributes sqlite_version Returns the version of the SQLite library which DBD::Spatialite is using, e.g., "2.8.0". Can only be read. sqlite_unicode If set to a true value, DBD::Spatialite will turn the UTF-8 flag on for all text strings coming out of the database (this feature is currently disabled for perl < 5.8.5). For more details on the UTF-8 flag see perlunicode. The default is for the UTF-8 flag to be turned off. Also note that due to some bizarreness in SQLite's type system (see ), if you want to retain blob-style behavior for some columns under "$dbh->{sqlite_unicode} = 1" (say, to store images in the database), you have to state so explicitly using the 3-argument form of "bind_param" in DBI when doing updates: use DBI qw(:sql_types); $dbh->{sqlite_unicode} = 1; my $sth = $dbh->prepare("INSERT INTO mytable (blobcolumn) VALUES (?)"); # Binary_data will be stored as is. $sth->bind_param(1, $binary_data, SQL_BLOB); Defining the column type as "BLOB" in the DDL is not sufficient. This attribute was originally named as "unicode", and renamed to "sqlite_unicode" for integrity since version 1.26_06. Old "unicode" attribute is still accessible but will be deprecated in the near future. METHODS table_info $sth = $dbh->table_info(undef, $schema, $table, $type, \%attr); Returns all tables and schemas (databases) as specified in "table_info" in DBI. The schema and table arguments will do a "LIKE" search. You can specify an ESCAPE character by including an 'Escape' attribute in \%attr. The $type argument accepts a comma seperated list of the following types 'TABLE', 'VIEW', 'LOCAL TEMPORARY' and 'SYSTEM TABLE' (by default all are returned). Note that a statement handle is returned, and not a direct list of tables. The following fields are returned: TABLE_CAT: Always NULL, as SQLite does not have the concept of catalogs. TABLE_SCHEM: The name of the schema (database) that the table or view is in. The default schema is 'main', temporary tables are in 'temp' and other databases will be in the name given when the database was attached. TABLE_NAME: The name of the table or view. TABLE_TYPE: The type of object returned. Will be one of 'TABLE', 'VIEW', 'LOCAL TEMPORARY' or 'SYSTEM TABLE'. DRIVER PRIVATE METHODS The following methods can be called via the func() method with a little tweak, but the use of func() method is now discouraged by the DBI author for various reasons (see DBI's document for details). So, if you're using DBI >= 1.608, use these "sqlite_" methods. If you need to use an older DBI, you can call these like this: $dbh->func( ..., "(method name without sqlite_ prefix)" ); $dbh->x_spatialite_last_insert_rowid() This method returns the last inserted rowid. If you specify an INTEGER PRIMARY KEY as the first column in your table, that is the column that is returned. Otherwise, it is the hidden ROWID column. See the sqlite docs for details. Generally you should not be using this method. Use the DBI last_insert_id method instead. The usage of this is: $h->last_insert_id($catalog, $schema, $table_name, $field_name [, \%attr ]) Running "$h->last_insert_id("","","","")" is the equivalent of running "$dbh->x_spatialite_last_insert_rowid()" directly. $dbh->x_spatialite_busy_timeout() Retrieve the current busy timeout. $dbh->x_spatialite_busy_timeout( $ms ) Set the current busy timeout. The timeout is in milliseconds. $dbh->x_spatialite_create_function( $name, $argc, $code_ref ) This method will register a new function which will be useable in an SQL query. The method's parameters are: $name The name of the function. This is the name of the function as it will be used from SQL. $argc The number of arguments taken by the function. If this number is -1, the function can take any number of arguments. $code_ref This should be a reference to the function's implementation. For example, here is how to define a now() function which returns the current number of seconds since the epoch: $dbh->x_spatialite_create_function( 'now', 0, sub { return time } ); After this, it could be use from SQL as: INSERT INTO mytable ( now() ); REGEXP function SQLite includes syntactic support for an infix operator 'REGEXP', but without any implementation. The "DBD::Spatialite" driver automatically registers an implementation that performs standard perl regular expression matching, using current locale. So for example you can search for words starting with an 'A' with a query like SELECT * from table WHERE column REGEXP '\bA\w+' If you want case-insensitive searching, use perl regex flags, like this : SELECT * from table WHERE column REGEXP '(?i:\bA\w+)' The default REGEXP implementation can be overriden through the "create_function" API described above. Note that regexp matching will not use SQLite indices, but will iterate over all rows, so it could be quite costly in terms of performance. $dbh->x_spatialite_create_collation( $name, $code_ref ) This method manually registers a new function which will be useable in an SQL query as a COLLATE option for sorting. Such functions can also be registered automatically on demand: see section "COLLATION FUNCTIONS" below. The method's parameters are: $name The name of the function exposed to SQL. $code_ref Reference to the function's implementation. The driver will check that this is a proper sorting function. $dbh->x_spatialite_collation_needed( $code_ref ) This method manually registers a callback function that will be invoked whenever an undefined collation sequence is required from an SQL statement. The callback is invoked as $code_ref->($dbh, $collation_name) and should register the desired collation using "x_spatialite_create_collation". An initial callback is already registered by "DBD::Spatialite", so for most common cases it will be simpler to just add your collation sequences in the %DBD::Spatialite::COLLATION hash (see section "COLLATION FUNCTIONS" below). $dbh->x_spatialite_create_aggregate( $name, $argc, $pkg ) This method will register a new aggregate function which can then be used from SQL. The method's parameters are: $name The name of the aggregate function, this is the name under which the function will be available from SQL. $argc This is an integer which tells the SQL parser how many arguments the function takes. If that number is -1, the function can take any number of arguments. $pkg This is the package which implements the aggregator interface. The aggregator interface consists of defining three methods: new() This method will be called once to create an object which should be used to aggregate the rows in a particular group. The step() and finalize() methods will be called upon the reference return by the method. step(@_) This method will be called once for each row in the aggregate. finalize() This method will be called once all rows in the aggregate were processed and it should return the aggregate function's result. When there is no rows in the aggregate, finalize() will be called right after new(). Here is a simple aggregate function which returns the variance (example adapted from pysqlite): package variance; sub new { bless [], shift; } sub step { my ( $self, $value ) = @_; push @$self, $value; } sub finalize { my $self = $_[0]; my $n = @$self; # Variance is NULL unless there is more than one row return undef unless $n || $n == 1; my $mu = 0; foreach my $v ( @$self ) { $mu += $v; } $mu /= $n; my $sigma = 0; foreach my $v ( @$self ) { $sigma += ($x - $mu)**2; } $sigma = $sigma / ($n - 1); return $sigma; } $dbh->x_spatialite_create_aggregate( "variance", 1, 'variance' ); The aggregate function can then be used as: SELECT group_name, variance(score) FROM results GROUP BY group_name; For more examples, see the DBD::Spatialite::Cookbook. $dbh->x_spatialite_progress_handler( $n_opcodes, $code_ref ) This method registers a handler to be invoked periodically during long running calls to SQLite. An example use for this interface is to keep a GUI updated during a large query. The parameters are: $n_opcodes The progress handler is invoked once for every $n_opcodes virtual machine opcodes in SQLite. $code_ref Reference to the handler subroutine. If the progress handler returns non-zero, the SQLite operation is interrupted. This feature can be used to implement a "Cancel" button on a GUI dialog box. Set this argument to "undef" if you want to unregister a previous progress handler. $dbh->x_spatialite_commit_hook( $code_ref ) This method registers a callback function to be invoked whenever a transaction is committed. Any callback set by a previous call to "x_spatialite_commit_hook" is overridden. A reference to the previous callback (if any) is returned. Registering an "undef" disables the callback. When the commit hook callback returns zero, the commit operation is allowed to continue normally. If the callback returns non-zero, then the commit is converted into a rollback (in that case, any attempt to *explicitly* call "$dbh->rollback()" afterwards would yield an error). $dbh->x_spatialite_rollback_hook( $code_ref ) This method registers a callback function to be invoked whenever a transaction is rolled back. Any callback set by a previous call to "x_spatialite_rollback_hook" is overridden. A reference to the previous callback (if any) is returned. Registering an "undef" disables the callback. $dbh->x_spatialite_update_hook( $code_ref ) This method registers a callback function to be invoked whenever a row is updated, inserted or deleted. Any callback set by a previous call to "x_spatialite_update_hook" is overridden. A reference to the previous callback (if any) is returned. Registering an "undef" disables the callback. The callback will be called as $code_ref->($action_code, $database, $table, $rowid) where $action_code is an integer equal to either "DBD::Spatialite::INSERT", "DBD::Spatialite::DELETE" or "DBD::Spatialite::UPDATE" (see "Action Codes"); $database is the name of the database containing the affected row; $table is the name of the table containing the affected row; $rowid is the unique 64-bit signed integer key of the affected row within that table. $dbh->x_spatialite_set_authorizer( $code_ref ) This method registers an authorizer callback to be invoked whenever SQL statements are being compiled by the "prepare" in DBI method. The authorizer callback should return "DBD::Spatialite::OK" to allow the action, "DBD::Spatialite::IGNORE" to disallow the specific action but allow the SQL statement to continue to be compiled, or "DBD::Spatialite::DENY" to cause the entire SQL statement to be rejected with an error. If the authorizer callback returns any other value, then then "prepare" call that triggered the authorizer will fail with an error message. An authorizer is used when preparing SQL statements from an untrusted source, to ensure that the SQL statements do not try to access data they are not allowed to see, or that they do not try to execute malicious statements that damage the database. For example, an application may allow a user to enter arbitrary SQL queries for evaluation by a database. But the application does not want the user to be able to make arbitrary changes to the database. An authorizer could then be put in place while the user-entered SQL is being prepared that disallows everything except SELECT statements. The callback will be called as $code_ref->($action_code, $string1, $string2, $database, $trigger_or_view) where $action_code is an integer that specifies what action is being authorized (see "Action Codes"). $string1, $string2 are strings that depend on the action code (see "Action Codes"). $database is the name of the database ("main", "temp", etc.) if applicable. $trigger_or_view is the name of the inner-most trigger or view that is responsible for the access attempt, or "undef" if this access attempt is directly from top-level SQL code. $dbh->x_spatialite_backup_from_file( $filename ) This method accesses the SQLite Online Backup API, and will take a backup of the named database file, copying it to, and overwriting, your current database connection. This can be particularly handy if your current connection is to the special :memory: database, and you wish to populate it from an existing DB. $dbh->x_spatialite_backup_to_file( $filename ) This method accesses the SQLite Online Backup API, and will take a backup of the currently connected database, and write it out to the named file. $dbh->x_spatialite_enable_load_extension( $bool ) Calling this method with a true value enables loading (external) sqlite3 extensions. After the call, you can load extensions like this: $dbh->x_spatialite_enable_load_extension(1); $sth = $dbh->prepare("select load_extension('libsqlitefunctions.so')") or die "Cannot prepare: " . $dbh->errstr(); DRIVER CONSTANTS A subset of SQLite C constants are made available to Perl, because they may be needed when writing hooks or authorizer callbacks. For accessing such constants, the "DBD::Spatialite" module must be explicitly "use"d at compile time. For example, an authorizer that forbids any DELETE operation would be written as follows : use DBD::Spatialite; $dbh->x_spatialite_set_authorizer(sub { my $action_code = shift; return $action_code == DBD::Spatialite::DELETE ? DBD::Spatialite::DENY : DBD::Spatialite::OK; }); The list of constants implemented in "DBD::Spatialite" is given below; more information can be found ad at . Authorizer Return Codes OK DENY IGNORE Action Codes The "set_authorizer" method registers a callback function that is invoked to authorize certain SQL statement actions. The first parameter to the callback is an integer code that specifies what action is being authorized. The second and third parameters to the callback are strings, the meaning of which varies according to the action code. Below is the list of action codes, together with their associated strings. # constant string1 string2 # ======== ======= ======= CREATE_INDEX Index Name Table Name CREATE_TABLE Table Name undef CREATE_TEMP_INDEX Index Name Table Name CREATE_TEMP_TABLE Table Name undef CREATE_TEMP_TRIGGER Trigger Name Table Name CREATE_TEMP_VIEW View Name undef CREATE_TRIGGER Trigger Name Table Name CREATE_VIEW View Name undef DELETE Table Name undef DROP_INDEX Index Name Table Name DROP_TABLE Table Name undef DROP_TEMP_INDEX Index Name Table Name DROP_TEMP_TABLE Table Name undef DROP_TEMP_TRIGGER Trigger Name Table Name DROP_TEMP_VIEW View Name undef DROP_TRIGGER Trigger Name Table Name DROP_VIEW View Name undef INSERT Table Name undef PRAGMA Pragma Name 1st arg or undef READ Table Name Column Name SELECT undef undef TRANSACTION Operation undef UPDATE Table Name Column Name ATTACH Filename undef DETACH Database Name undef ALTER_TABLE Database Name Table Name REINDEX Index Name undef ANALYZE Table Name undef CREATE_VTABLE Table Name Module Name DROP_VTABLE Table Name Module Name FUNCTION undef Function Name SAVEPOINT Operation Savepoint Name COLLATION FUNCTIONS Definition SQLite v3 provides the ability for users to supply arbitrary comparison functions, known as user-defined "collation sequences" or "collating functions", to be used for comparing two text values. explains how collations are used in various SQL expressions. Builtin collation sequences The following collation sequences are builtin within SQLite : BINARY Compares string data using memcmp(), regardless of text encoding. NOCASE The same as binary, except the 26 upper case characters of ASCII are folded to their lower case equivalents before the comparison is performed. Note that only ASCII characters are case folded. SQLite does not attempt to do full UTF case folding due to the size of the tables required. RTRIM The same as binary, except that trailing space characters are ignored. In addition, "DBD::Spatialite" automatically installs the following collation sequences : perl corresponds to the Perl "cmp" operator perllocale Perl "cmp" operator, in a context where "use locale" is activated. Usage You can write for example CREATE TABLE foo( txt1 COLLATE perl, txt2 COLLATE perllocale, txt3 COLLATE nocase ) or SELECT * FROM foo ORDER BY name COLLATE perllocale Unicode handling If the attribute "$dbh->{sqlite_unicode}" is set, strings coming from the database and passed to the collation function will be properly tagged with the utf8 flag; but this only works if the "sqlite_unicode" attribute is set before the first call to a perl collation sequence . The recommended way to activate unicode is to set the parameter at connection time : my $dbh = DBI->connect( "dbi:SQLite:dbname=foo", "", "", { RaiseError => 1, sqlite_unicode => 1, } ); Adding user-defined collations The native SQLite API for adding user-defined collations is exposed through methods "x_spatialite_create_collation" and "x_spatialite_collation_needed". To avoid calling these functions every time a $dbh handle is created, "DBD::Spatialite" offers a simpler interface through the %DBD::Spatialite::COLLATION hash : just insert your own collation functions in that hash, and whenever an unknown collation name is encountered in SQL, the appropriate collation function will be loaded on demand from the hash. For example, here is a way to sort text values regardless of their accented characters : use DBD::Spatialite; $DBD::Spatialite::COLLATION{no_accents} = sub { my ( $a, $b ) = map lc, @_; tr[àâáäåãçðèêéëìîíïñòôóöõøùûúüý] [aaaaaacdeeeeiiiinoooooouuuuy] for $a, $b; $a cmp $b; }; my $dbh = DBI->connect("dbi:SQLite:dbname=dbfile"); my $sql = "SELECT ... FROM ... ORDER BY ... COLLATE no_accents"); my $rows = $dbh->selectall_arrayref($sql); The builtin "perl" or "perllocale" collations are predefined in that same hash. The COLLATION hash is a global registry within the current process; hence there is a risk of undesired side-effects. Therefore, to prevent action at distance, the hash is implemented as a "write-only" hash, that will happily accept new entries, but will raise an exception if any attempt is made to override or delete a existing entry (including the builtin "perl" and "perllocale"). If you really, really need to change or delete an entry, you can always grab the tied object underneath %DBD::Spatialite::COLLATION --- but don't do that unless you really know what you are doing. Also observe that changes in the global hash will not modify existing collations in existing database handles: it will only affect new *requests* for collations. In other words, if you want to change the behaviour of a collation within an existing $dbh, you need to call the "create_collation" method directly. TO DO The following items remain to be done. Warnings Upgrade We currently use a horridly hacky method to issue and suppress warnings. It suffices for now, but just barely. Migrate all of the warning code to use the recommended DBI warnings. Leak Detection Implement one or more leak detection tests that only run during AUTOMATED_TESTING and RELEASE_TESTING and validate that none of the C code we work with leaks. Stream API for Blobs Reading/writing into blobs using "sqlite2_blob_open" / "sqlite2_blob_close". Flags for sqlite3_open_v2 Support the full API of sqlite3_open_v2 (flags for opening the file). SUPPORT Bugs should be reported via the bug tracker at Note that bugs in the bundled sqlite and spatialite code should be reported to their respective developers. AUTHORS Lokkju Brennr COPYRIGHT The bundled Spatialite code in this ditribution is MPL/GPL/LGPL The bundled SQLite code in this distribution is Public Domain. DBD::Spatialite is copyright 2011 Lokkju Brennr. Some parts copyright 2008 Francis J. Lacoste. Some parts copyright 2008 Wolfgang Sourdeau. Some parts copyright 2008 - 2010 Adam Kennedy. Derived from DBD::SQLite copyright 2002 - 2007 Matt Sargent. Some parts derived from DBD::SQLite::Amalgamation copyright 2008 Audrey Tang. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module.