}
}
- $GLOBALS['wfpl_db_handle'] = mysqli_connect($host, $user, $pass);
+ $GLOBALS['wfpl_db_handle'] = @mysqli_connect($host, $user, $pass);
if(!$GLOBALS['wfpl_db_handle']) {
- die('Could not connect to the database: ' . mysqli_error());
+ die('Server error: Database connection failed');
+ # to show username and host: mysqli_connect_error()
}
mysqli_set_charset($GLOBALS['wfpl_db_handle'], $encoding);
#
# %% put a % in the output
# %i put an integer in the output (strips non-numeric digits, and puts in 0 if blank)
+# %I a list of integers (as %i) separated by commas
# %f put a floating point value in the output (strips non-numeric digits, puts in 0.0 if not valid)
# %" output double quotes, surrounding the variable which is encoded to be in there.
# %s output encoded to be in double quotes, but don't output the quotes
} elseif($chr == 's') {
$out .= db_enc_sql(array_shift($args));
} elseif($chr == 'i') {
- $int = format_int(array_shift($args));
- if($int == '') $int = '0';
- $out .= $int;
+ $out .= format_int_0(array_shift($args));
+ } elseif($chr == 'I') {
+ $arg = array_shift($args);
+ $first = true;
+ foreach ($arg as $int) {
+ if ($first) {
+ $first = false;
+ } else {
+ $out .= ',';
+ }
+ $out .= format_int_0($int);
+ }
} elseif($chr == 'f') {
$arg = array_shift($args);
if(is_numeric($arg)) {
return;
}
$inc = floor(DB_ORD_MAX / ($c + 1));
- $cur = $inc;
- foreach($ids as $id) {
- db_update($table, $field, $cur, 'where id=%i', $id);
- $cur += $inc;
+ $ord = $inc;
+ $count = count($ids);
+ for ($i = 0; $i < $count; $i += 1000) {
+ $values = [];
+ $j_max = min($count, $i + 1000);
+ for ($j = $i; $j < $j_max; ++$j) {
+ $id = $ids[$j];
+ $values[] = "($id,$ord)";
+ $ord += $inc;
+ }
+ $sql =
+ "insert into $table (id,$field) values "
+ . implode(',', $values)
+ . " on duplicate key update $field=VALUES($field)"
+ ;
+ db_send_query($sql);
}
}
return $prev_ord + round(($next_ord - $prev_ord) / 2);
}
}
+
+# Call this to upgrade your database (using upgrade functions you define.)
+#
+# You can call this from config.php right after db_connect() to make sure the
+# database is up to date.
+#
+# When you want to update your schema, define a new function named
+# db_upgrade_to_X() where X is the next integer (start at 1).
+#
+# If there are any page views while your upgrade function is running, they will
+# stall until the upgrade function completes. This is often better than running
+# while the databse is in a transitional state, and is way way better than
+# running the upgrade function multiple times concurrently.
+#
+# Efficiency: this function is designed to be lean enough that you'd run it on
+# every page load, so you never forget to upgrade your schema after uploading
+# code changes. If your schema is up to date, this will only execute one
+# database query, and that query loads the persistent data store (used by
+# persistent_get()), so if you use that, you'll need that query to happen
+# anyway (giving this function a zero-query overhead).
+
+function db_upgrade() {
+ if (isset($GLOBALS['wfpl_persistent'])) {
+ $version = persistent_get('wfpl_db_version');
+ } else {
+ # custom version of persistent_init() that creates the table if needed
+ # instead of dying
+ $GLOBALS['wfpl_persistent'] = array();
+ _db_connection_needed();
+ $result = mysqli_query($GLOBALS['wfpl_db_handle'], 'select k,v from wfpl_persistent');
+ if ($result) {
+ while($row = mysqli_fetch_assoc($result)) {
+ $GLOBALS['wfpl_persistent'][$row['k']] = json_decode($row['v'], true);
+ } unset($row);
+ if (isset($GLOBALS['wfpl_persistent']['wfpl_db_version'])) {
+ $version = $GLOBALS['wfpl_persistent']['wfpl_db_version'];
+ } else {
+ $version = -1;
+ }
+ } else {
+ db_send_query('create table if not exists wfpl_persistent (k varchar(30) binary not null default "", v mediumblob, primary key (k)) CHARSET=utf8;');
+ $version = -1;
+ }
+ }
+
+ if ($version === -1) {
+ db_send_query('create table if not exists wfpl_mutexes (id int unique auto_increment, name varchar(255) binary, expires int(11)) CHARSET=utf8;');
+ $version = 0;
+ # don't save version now in case another thread is doing this too
+ }
+ $next = $version + 1;
+ if (function_exists("db_upgrade_to_$next")) {
+ require_once(__DIR__.'/'.'persistent.php');
+ require_once(__DIR__.'/'.'mutex.php');
+ mutex_lock('wfpl_db_upgrade', 20);
+ # check version again, in case another thread upgraded the database
+ # while we waited for a lock just now
+ persistent_invalidate_cache();
+ $version = persistent_get('wfpl_db_version');
+ if ($version === null) {
+ $version = 0;
+ }
+
+ for ($next = $version + 1; function_exists("db_upgrade_to_$next"); ++$next) {
+ call_user_func("db_upgrade_to_$next");
+ persistent_set('wfpl_db_version', $next);
+ }
+ mutex_unlock('wfpl_db_upgrade');
+ }
+}