return true;
}
- /**
- * Returns true if this database requires that SELECT DISTINCT queries require that all
- ORDER BY expressions occur in the SELECT list per the SQL92 standard
- *
- * @return bool
- */
- function standardSelectDistinct() {
- 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';
throw new MWException( 'Database serialization may cause problems, since the connection is not restored on wakeup.' );
}
- /**
- * Same as new DatabaseMysql( ... ), kept for backward compatibility
- * @deprecated since 1.17
- *
- * @param $server
- * @param $user
- * @param $password
- * @param $dbName
- * @param $flags int
- * @return DatabaseMysql
- */
- static function newFromParams( $server, $user, $password, $dbName, $flags = 0 ) {
- wfDeprecated( __METHOD__, '1.17' );
- return new DatabaseMysql( $server, $user, $password, $dbName, $flags );
- }
-
- /**
- * Same as new factory( ... ), kept for backward compatibility
- * @deprecated since 1.18
- * @see Database::factory()
- * @return DatabaseBase
- */
- public final static function newFromType( $dbType, $p = array() ) {
- wfDeprecated( __METHOD__, '1.18' );
- if ( isset( $p['tableprefix'] ) ) {
- $p['tablePrefix'] = $p['tableprefix'];
- }
- return self::factory( $dbType, $p );
- }
-
/**
* Given a DB type, construct the name of the appropriate child class of
* DatabaseBase. This is designed to replace all of the manual stuff like:
* & = filename; reads the file and inserts as a blob
* (we don't use this though...)
*
- * This function should not be used directly by new code outside of the
- * database classes. The query wrapper functions (select() etc.) should be
- * used instead.
- *
* @param $sql string
* @param $func string
*
* @return array
*/
- function prepare( $sql, $func = 'DatabaseBase::prepare' ) {
+ protected function prepare( $sql, $func = 'DatabaseBase::prepare' ) {
/* MySQL doesn't support prepared statements (yet), so just
pack up the query for reference. We'll manually replace
the bits later. */
* Free a prepared query, generated by prepare().
* @param $prepared
*/
- function freePrepared( $prepared ) {
+ protected function freePrepared( $prepared ) {
/* No-op by default */
}
}
/**
- * Prepare & execute an SQL statement, quoting and inserting arguments
- * in the appropriate places.
- *
- * This function should not be used directly by new code outside of the
- * database classes. The query wrapper functions (select() etc.) should be
- * used instead.
- *
- * @param $query String
- * @param $args ...
+ * For faking prepared SQL statements on DBs that don't support it directly.
*
- * @return ResultWrapper
- */
- function safeQuery( $query, $args = null ) {
- $prepared = $this->prepare( $query, 'DatabaseBase::safeQuery' );
-
- if ( !is_array( $args ) ) {
- # Pull the var args
- $args = func_get_args();
- array_shift( $args );
- }
-
- $retval = $this->execute( $prepared, $args );
- $this->freePrepared( $prepared );
-
- return $retval;
- }
-
- /**
- * For faking prepared SQL statements on DBs that don't support
- * it directly.
* @param $preparedQuery String: a 'preparable' SQL statement
* @param $args Array of arguments to fill it with
* @return string executable SQL
* @param $matches Array
* @return String
*/
- function fillPreparedArg( $matches ) {
+ protected function fillPreparedArg( $matches ) {
switch( $matches[1] ) {
case '\\?': return '?';
case '\\!': return '!';
*
* @param $res Mixed: A SQL result
*/
- function freeResult( $res ) {
- }
-
- /**
- * Simple UPDATE wrapper.
- * Usually throws a DBQueryError on failure.
- * If errors are explicitly ignored, returns success
- *
- * This function exists for historical reasons, DatabaseBase::update() has a more standard
- * calling convention and feature set
- *
- * @param $table string
- * @param $var
- * @param $value
- * @param $cond
- * @param $fname string
- *
- * @return bool
- */
- function set( $table, $var, $value, $cond, $fname = 'DatabaseBase::set' ) {
- $table = $this->tableName( $table );
- $sql = "UPDATE $table SET $var = '" .
- $this->strencode( $value ) . "' WHERE ($cond)";
-
- return (bool)$this->query( $sql, $fname );
- }
+ public function freeResult( $res ) {}
/**
* A SELECT wrapper which returns a single field from a single result row.
* @param $vars string|array
*
* May be either a field name or an array of field names. The field names
- * here are complete fragments of SQL, for direct inclusion into the SELECT
- * query. Expressions and aliases may be specified as in SQL, for example:
+ * can be complete fragments of SQL, for direct inclusion into the SELECT
+ * query. If an array is given, field aliases can be specified, for example:
*
- * array( 'MAX(rev_id) AS maxrev' )
+ * array( 'maxrev' => 'MAX(rev_id)' )
+ *
+ * This includes an expression with the alias "maxrev" in the query.
*
* If an expression is given, care must be taken to ensure that it is
* DBMS-independent.
/**
* The equivalent of DatabaseBase::select() except that the constructed SQL
- * is returned, instead of being immediately executed.
+ * is returned, instead of being immediately executed. This can be useful for
+ * doing UNION queries, where the SQL text of each query is needed. In general,
+ * however, callers outside of Database classes should just use select().
*
* @param $table string|array Table name
* @param $vars string|array Field names
$options = array(), $join_conds = array() )
{
if ( is_array( $vars ) ) {
- $vars = implode( ',', $vars );
+ $vars = implode( ',', $this->fieldNamesWithAlias( $vars ) );
}
$options = (array)$options;
$fname = 'DatabaseBase::estimateRowCount', $options = array() )
{
$rows = 0;
- $res = $this->select ( $table, 'COUNT(*) AS rowcount', $conds, $fname, $options );
+ $res = $this->select( $table, array( 'rowcount' => 'COUNT(*)' ), $conds, $fname, $options );
if ( $res ) {
$row = $this->fetchRow( $res );
* @param $options array
* @return string
*/
- function makeInsertOptions( $options ) {
+ protected function makeInsertOptions( $options ) {
return implode( ' ', $options );
}
* @param $options Array: The options passed to DatabaseBase::update
* @return string
*/
- function makeUpdateOptions( $options ) {
+ protected function makeUpdateOptions( $options ) {
if ( !is_array( $options ) ) {
$options = array( $options );
}
}
/**
- * Bitwise operations
+ * Return aggregated value alias
+ *
+ * @param $valuedata
+ * @param $valuename string
+ *
+ * @return string
*/
+ public function aggregateValue( $valuedata, $valuename = 'value' ) {
+ return $valuename;
+ }
/**
* @param $field
return "($fieldLeft | $fieldRight)";
}
+ /**
+ * Build a concatenation list to feed into a SQL query
+ * @param $stringList Array: list of raw SQL expressions; caller is responsible for any quoting
+ * @return String
+ */
+ public function buildConcat( $stringList ) {
+ return 'CONCAT(' . implode( ',', $stringList ) . ')';
+ }
+
/**
* Change the current database
*
# Quote the $database and $table and apply the prefix if not quoted.
if ( isset( $database ) ) {
- $database = ( $format == 'quoted' || $this->isQuotedIdentifier( $database ) ? $database : $this->addIdentifierQuotes( $database ) );
+ if ( $format == 'quoted' && !$this->isQuotedIdentifier( $database ) ) {
+ $database = $this->addIdentifierQuotes( $database );
+ }
}
$table = "{$prefix}{$table}";
return $retval;
}
+ /**
+ * Get an aliased field name
+ * e.g. fieldName AS newFieldName
+ *
+ * @param $name string Field name
+ * @param $alias string|bool Alias (optional)
+ * @return string SQL name for aliased field. Will not alias a field to its own name
+ */
+ public function fieldNameWithAlias( $name, $alias = false ) {
+ if ( !$alias || (string)$alias === (string)$name ) {
+ return $name;
+ } else {
+ return $name . ' AS ' . $alias; //PostgreSQL needs AS
+ }
+ }
+
+ /**
+ * Gets an array of aliased field names
+ *
+ * @param $fields array( [alias] => field )
+ * @return array of strings, see fieldNameWithAlias()
+ */
+ public function fieldNamesWithAlias( $fields ) {
+ $retval = array();
+ foreach ( $fields as $alias => $field ) {
+ if ( is_numeric( $alias ) ) {
+ $alias = $field;
+ }
+ $retval[] = $this->fieldNameWithAlias( $field, $alias );
+ }
+ return $retval;
+ }
+
/**
* Get the aliased table name clause for a FROM clause
* which might have a JOIN and/or USE INDEX clause
*
* @return string
*/
- function indexName( $index ) {
+ protected function indexName( $index ) {
// Backwards-compatibility hack
$renamed = array(
'ar_usertext_timestamp' => 'usertext_timestamp',
return $name[0] == '"' && substr( $name, -1, 1 ) == '"';
}
- /**
- * Backwards compatibility, identifier quoting originated in DatabasePostgres
- * which used quote_ident which does not follow our naming conventions
- * was renamed to addIdentifierQuotes.
- * @deprecated since 1.18 use addIdentifierQuotes
- *
- * @param $s string
- *
- * @return string
- */
- function quote_ident( $s ) {
- wfDeprecated( __METHOD__, '1.18' );
- return $this->addIdentifierQuotes( $s );
- }
-
- /**
- * Escape string for safe LIKE usage.
- * WARNING: you should almost never use this function directly,
- * instead use buildLike() that escapes everything automatically
- * @deprecated since 1.17, warnings in 1.17, removed in ???
- *
- * @param $s string
- *
- * @return string
- */
- public function escapeLike( $s ) {
- wfDeprecated( __METHOD__, '1.17' );
- return $this->escapeLikeInternal( $s );
- }
-
/**
* @param $s string
* @return string
* If the result of the query is not ordered, then the rows to be returned
* are theoretically arbitrary.
*
- * $sql is expected to be a SELECT, if that makes a difference. For
- * UPDATE, limitResultForUpdate should be used.
+ * $sql is expected to be a SELECT, if that makes a difference.
*
* The version provided by default works in MySQL and SQLite. It will very
* likely need to be overridden for most other DBMSes.
if ( !is_numeric( $limit ) ) {
throw new DBUnexpectedError( $this, "Invalid non-numeric limit passed to limitResult()\n" );
}
-
return "$sql LIMIT "
- . ( ( is_numeric( $offset ) && $offset != 0 ) ? "{$offset}," : "" )
- . "{$limit} ";
- }
-
- /**
- * @param $sql
- * @param $num
- * @return string
- */
- function limitResultForUpdate( $sql, $num ) {
- return $this->limitResult( $sql, $num, 0 );
+ . ( ( is_numeric( $offset ) && $offset != 0 ) ? "{$offset}," : "" )
+ . "{$limit} ";
}
/**
}
}
- /**
- * Return aggregated value alias
- *
- * @param $valuedata
- * @param $valuename string
- *
- * @return string
- */
- function aggregateValue ( $valuedata, $valuename = 'value' ) {
- return $valuename;
- }
-
/**
* Ping the server and try to reconnect if it there is no connection
*
return $b;
}
- /**
- * Override database's default connection timeout
- *
- * @param $timeout Integer in seconds
- * @return void
- * @deprecated since 1.19; use setSessionOptions()
- */
- public function setTimeout( $timeout ) {
- wfDeprecated( __METHOD__, '1.19' );
- $this->setSessionOptions( array( 'connTimeout' => $timeout ) );
- }
-
/**
* Override database's default behavior. $options include:
* 'connTimeout' : Set the connection timeout value in seconds.
return $this->indexName( $matches[1] );
}
- /**
- * Build a concatenation list to feed into a SQL query
- * @param $stringList Array: list of raw SQL expressions; caller is responsible for any quoting
- * @return String
- */
- function buildConcat( $stringList ) {
- return 'CONCAT(' . implode( ',', $stringList ) . ')';
- }
-
/**
* Check to see if a named lock is available. This is non-blocking.
*
dépôts / lhc / web / wiklou.git / blobdiff