}
};
+/**
+ * Utility class
+ * @addtogroup Database
+ *
+ * This allows us to distinguish a blob from a normal string and an array of strings
+ */
+class Blob {
+ private $mData;
+ function __construct($data) {
+ $this->mData = $data;
+ }
+ function fetch() {
+ return $this->mData;
+ }
+};
+
/**
* Utility class.
* @addtogroup Database
$cache = new HTMLFileCache( $t );
if( $cache->isFileCached() ) {
- // FIXME: $msg is not defined on the next line.
+ // @todo, FIXME: $msg is not defined on the next line.
$msg = '<p style="color: red"><b>'.$msg."<br />\n" .
$cachederror . "</b></p>\n";
return true;
}
+ /**
+ * Returns true if this database does an implicit order by when the column has an index
+ * For example: SELECT page_title FROM page LIMIT 1
+ */
+ function implicitOrderby() {
+ return true;
+ }
+
/**
* Returns true if this database can do a native search on IP columns
* e.g. this works as expected: .. WHERE rc_ip = '127.42.12.102/32';
return false;
}
+ /**
+ * Returns true if this database can use functional indexes
+ */
+ function functionalIndexes() {
+ return false;
+ }
+
/**#@+
* Get function
*/
global $wgUser;
if ( is_object( $wgUser ) && !($wgUser instanceof StubObject) ) {
$userName = $wgUser->getName();
- if ( strlen( $userName ) > 15 ) {
- $userName = substr( $userName, 0, 15 ) . '...';
+ if ( mb_strlen( $userName ) > 15 ) {
+ $userName = mb_substr( $userName, 0, 15 ) . '...';
}
$userName = str_replace( '/', '', $userName );
} else {
# If DBO_TRX is set, start a transaction
if ( ( $this->mFlags & DBO_TRX ) && !$this->trxLevel() &&
- $sql != 'BEGIN' && $sql != 'COMMIT' && $sql != 'ROLLBACK'
- ) {
- $this->begin();
+ $sql != 'BEGIN' && $sql != 'COMMIT' && $sql != 'ROLLBACK') {
+ // avoid establishing transactions for SHOW and SET statements too -
+ // that would delay transaction initializations to once connection
+ // is really used by application
+ $sqlstart = substr($sql,0,10); // very much worth it, benchmark certified(tm)
+ if (strpos($sqlstart,"SHOW ")!==0 and strpos($sqlstart,"SET ")!==0)
+ $this->begin();
}
if ( $this->debug() ) {
* (for the log)
* @param array $options An array of UPDATE options, can be one or
* more of IGNORE, LOW_PRIORITY
+ * @return bool
*/
function update( $table, $values, $conds, $fname = 'Database::update', $options = array() ) {
$table = $this->tableName( $table );
if ( $conds != '*' ) {
$sql .= " WHERE " . $this->makeList( $conds, LIST_AND );
}
- $this->query( $sql, $fname );
+ return $this->query( $sql, $fname );
}
/**
$list .= "($value)";
} elseif ( ($mode == LIST_SET) && is_numeric( $field ) ) {
$list .= "$value";
- } elseif ( ($mode == LIST_AND || $mode == LIST_OR) && is_array ($value) ) {
- $list .= $field." IN (".$this->makeList($value).") ";
+ } elseif ( ($mode == LIST_AND || $mode == LIST_OR) && is_array($value) ) {
+ if( count( $value ) == 0 ) {
+ // Empty input... or should this throw an error?
+ $list .= '0';
+ } elseif( count( $value ) == 1 ) {
+ // Special-case single values, as IN isn't terribly efficient
+ $list .= $field." = ".$this->addQuotes( $value[0] );
+ } else {
+ $list .= $field." IN (".$this->makeList($value).") ";
+ }
+ } elseif( is_null($value) ) {
+ if ( $mode == LIST_AND || $mode == LIST_OR ) {
+ $list .= "$field IS ";
+ } elseif ( $mode == LIST_SET ) {
+ $list .= "$field = ";
+ }
+ $list .= 'NULL';
} else {
if ( $mode == LIST_AND || $mode == LIST_OR || $mode == LIST_SET ) {
$list .= "$field = ";
global $wgSharedDB;
# Skip quoted literals
if ( $name{0} != '`' ) {
- if ( $this->mTablePrefix !== '' && strpos( '.', $name ) === false ) {
+ if ( $this->mTablePrefix !== '' && strpos( $name, '.' ) === false ) {
$name = "{$this->mTablePrefix}$name";
}
if ( isset( $wgSharedDB ) && "{$this->mTablePrefix}user" == $name ) {
* This is handy when you need to construct SQL for joins
*
* Example:
- * list( $user, $watchlist ) = $dbr->tableNames('user','watchlist');
+ * list( $user, $watchlist ) = $dbr->tableNamesN('user','watchlist');
* $sql = "SELECT wl_namespace,wl_title FROM $watchlist,$user
* WHERE wl_user=user_id AND wl_user=$nameWithQuotes";
*/
}
/**
- * Rollback a transaction
+ * Rollback a transaction.
+ * No-op on non-transactional databases.
*/
function rollback( $fname = 'Database::rollback' ) {
- $this->query( 'ROLLBACK', $fname );
+ $this->query( 'ROLLBACK', $fname, true );
$this->mTrxLevel = 0;
}
*/
function getLag() {
$res = $this->query( 'SHOW PROCESSLIST' );
- # Find slave SQL thread. Assumed to be the second one running, which is a bit
- # dubious, but unfortunately there's no easy rigorous way
+ # Find slave SQL thread
while ( $row = $this->fetchObject( $res ) ) {
/* This should work for most situations - when default db
* for thread is not specified, it had no events executed,
return $this->tableName( $matches[1] );
}
+ /*
+ * Build a concatenation list to feed into a SQL query
+ */
+ function buildConcat( $stringList ) {
+ return 'CONCAT(' . implode( ',', $stringList ) . ')';
+ }
+
}
/**
* Result wrapper for grabbing data queried by someone else
* @addtogroup Database
*/
-class ResultWrapper {
- var $db, $result;
+class ResultWrapper implements Iterator {
+ var $db, $result, $pos = 0, $currentRow = null;
/**
* Create a new result object from a result resource and a Database object
function seek( $row ) {
$this->db->dataSeek( $this->result, $row );
}
-
- /**
- * Reset the cursor to the start of the result set
+
+ /*********************
+ * Iterator functions
+ * Note that using these in combination with the non-iterator functions
+ * above may cause rows to be skipped or repeated.
*/
+
function rewind() {
if ($this->numRows()) {
$this->db->dataSeek($this->result, 0);
}
+ $this->pos = 0;
+ $this->currentRow = null;
+ }
+
+ function current() {
+ if ( is_null( $this->currentRow ) ) {
+ $this->next();
+ }
+ return $this->currentRow;
}
+ function key() {
+ return $this->pos;
+ }
+
+ function next() {
+ $this->pos++;
+ $this->currentRow = $this->fetchObject();
+ return $this->currentRow;
+ }
+
+ function valid() {
+ return $this->current() !== false;
+ }
}
dépôts / lhc / web / wiklou.git / blobdiff