Req #60871 [Opn]: Support creating collations in SQLite3 class
Edit report at https://bugs.php.net/bug.php?id=60871&edit=1
ID: 60871
User updated by: macdewar at gmail dot com
Reported by: macdewar at gmail dot com
Summary: Support creating collations in SQLite3 class
Status: Open
Type: Feature/Change Request
Package: SQLite related
Operating System: GNU/Linux
PHP Version: 5.3.9
Block user comment: N
Private report: N
New Comment:
Test script has a typo.
replace "COLLATE NAT" with "COLLATE NATCMP"
Previous Comments:
------------------------------------------------------------------------
[2012-01-24 19:09:28] macdewar at gmail dot com
Description:
------------
The C API for SQLite3 offers an sqlite3_create_collation() feature that is missing from the PHP
SQLite3 class. createCollation() should be added to SQLite3, much like createFunction() and
createAggregate().
This allows using a PHP function or user-defined function as a collation for use in SQL, e.g.:
$db->createCollation('my_sort_rule', function($a,$b){
return custom_compare($a,$b);
});
$db->query('SELECT col FROM table ORDER BY col COLLATE my_sort_rule');
The included patch adds SQLite3::createCollation(). (the diff is against 5.3.9 release code, but
patching 5.3-dev or 5.4-dev with it works as of 2012-01-24)
Request #55226 is related -- asking for the same feature in PDO-sqlite3.
Test script:
---------------
<?php
$db = new SQLite3(':memory:');
$db->createCollation('NATCMP', 'strnatcmp');
$db->exec('CREATE TABLE t (s varchar(4))');
$db->exec("INSERT INTO t VALUES ('a1') ");
$db->exec("INSERT INTO t VALUES ('a10')");
$db->exec("INSERT INTO t VALUES ('a2') ");
$defaultSort = $db->query('SELECT s FROM t ORDER BY s');
$naturalSort = $db->query('SELECT s FROM t ORDER BY s COLLATE NAT');
echo "default\n";
while ($row = $defaultSort->fetchArray()){
echo $row['s'], "\n";
}
echo "natural\n";
while ($row = $naturalSort->fetchArray()){
echo $row['s'], "\n";
}
$db->close();
?>
Expected result:
----------------
default
a1
a10
a2
natural
a1
a2
a10
Actual result:
--------------
SQLite3::createCollation doesn't exist (yet).
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Edit this bug report at https://bugs.php.net/bug.php?id=60871&edit=1
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