In Database.php:
* Improved function documentation and doxygen output. Wrote extensive documentation for DatabaseBase::select(). * Broke some long lines. * Made doQuery(), makeSelectOptions(), makeInsertOptions(), makeUpdateOptions() and resultObject() protected instead of public. Fixed a caller of doQuery(), the only one I could find in core and extensions. * In Database::query(), removed some commented-out code, and made the comment style consistent within the function.
This commit is contained in:
Tim Starling
parent
f66a1c1bb9
commit
349dcaf7e8
2 changed files with 475 additions and 167 deletions
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@ -44,13 +44,11 @@ interface DatabaseType {
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/**
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* The DBMS-dependent part of query()
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* @todo FIXME: Make this private someday
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*
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* @param $sql String: SQL query.
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* @return Result object to feed to fetchObject, fetchRow, ...; or false on failure
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* @private
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*/
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function doQuery( $sql );
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protected function doQuery( $sql );
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/**
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* Fetch the next row from the given result object, in object form.
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@ -251,17 +249,37 @@ abstract class DatabaseBase implements DatabaseType {
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}
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/**
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* Boolean, controls output of large amounts of debug information
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* Boolean, controls output of large amounts of debug information.
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* @param $debug:
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* - true to enable debugging
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* - false to disable debugging
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* - omitted or null to do nothing
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*
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* @return The previous value of the flag
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*/
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function debug( $debug = null ) {
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return wfSetBit( $this->mFlags, DBO_DEBUG, $debug );
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}
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/**
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* Turns buffering of SQL result sets on (true) or off (false).
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* Default is "on" and it should not be changed without good reasons.
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* Turns buffering of SQL result sets on (true) or off (false). Default is
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* "on".
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*
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* @return bool
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* Unbuffered queries are very troublesome in MySQL:
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*
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* - If another query is executed while the first query is being read
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* out, the first query is killed. This means you can't call normal
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* MediaWiki functions while you are reading an unbuffered query result
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* from a normal wfGetDB() connection.
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*
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* - Unbuffered queries cause the MySQL server to use large amounts of
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* memory and to hold broad locks which block other queries.
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*
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* If you want to limit client-side memory, it's almost always better to
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* split up queries into batches using a LIMIT clause than to switch off
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* buffering.
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*
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* @return The previous value of the flag
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*/
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function bufferResults( $buffer = null ) {
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if ( is_null( $buffer ) ) {
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@ -277,32 +295,50 @@ abstract class DatabaseBase implements DatabaseType {
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* database errors. Default is on (false). When turned off, the
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* code should use lastErrno() and lastError() to handle the
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* situation as appropriate.
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*
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* @return The previous value of the flag.
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*/
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function ignoreErrors( $ignoreErrors = null ) {
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return wfSetBit( $this->mFlags, DBO_IGNORE, $ignoreErrors );
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}
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/**
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* The current depth of nested transactions
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* @param $level Integer: , default NULL.
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* Gets or sets the current transaction level.
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*
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* Historically, transactions were allowed to be "nested". This is no
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* longer supported, so this function really only returns a boolean.
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*
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* @param $level An integer (0 or 1), or omitted to leave it unchanged.
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* @return The previous value
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*/
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function trxLevel( $level = null ) {
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return wfSetVar( $this->mTrxLevel, $level );
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}
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/**
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* Number of errors logged, only useful when errors are ignored
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* Get/set the number of errors logged. Only useful when errors are ignored
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* @param $count The count to set, or omitted to leave it unchanged.
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* @return The error count
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*/
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function errorCount( $count = null ) {
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return wfSetVar( $this->mErrorCount, $count );
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}
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/**
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* Get/set the table prefix.
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* @param $prefix The table prefix to set, or omitted to leave it unchanged.
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* @return The previous table prefix.
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*/
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function tablePrefix( $prefix = null ) {
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return wfSetVar( $this->mTablePrefix, $prefix, true );
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}
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/**
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* Properties passed down from the server info array of the load balancer
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* Get properties passed down from the server info array of the load
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* balancer.
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*
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* @param $name The entry of the info array to get, or null to get the
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* whole array
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*/
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function getLBInfo( $name = null ) {
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if ( is_null( $name ) ) {
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@ -317,6 +353,10 @@ abstract class DatabaseBase implements DatabaseType {
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}
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/**
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* Set the LB info array, or a member of it. If called with one parameter,
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* the LB info array is set to that parameter. If it is called with two
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* parameters, the member with the given name is set to the given value.
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*
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* @param $name
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* @param $value
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* @return void
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@ -655,15 +695,25 @@ abstract class DatabaseBase implements DatabaseType {
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}
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/**
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* Usually aborts on failure. If errors are explicitly ignored, returns success.
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* Run an SQL query and return the result. Normally throws a DBQueryError
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* on failure. If errors are ignored, returns false instead.
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*
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* In new code, the query wrappers select(), insert(), update(), delete(),
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* etc. should be used where possible, since they give much better DBMS
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* independence and automatically quote or validate user input in a variety
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* of contexts. This function is generally only useful for queries which are
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* explicitly DBMS-dependent and are unsupported by the query wrappers, such
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* as CREATE TABLE.
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*
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* However, the query wrappers themselves should call this function.
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*
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* @param $sql String: SQL query
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* @param $fname String: Name of the calling function, for profiling/SHOW PROCESSLIST
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* comment (you can use __METHOD__ or add some extra info)
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* @param $tempIgnore Boolean: Whether to avoid throwing an exception on errors...
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* maybe best to catch the exception instead?
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* @return boolean|ResultWrapper. true for a successful write query, ResultWrapper object for a successful read query,
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* or false on failure if $tempIgnore set
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* @return boolean|ResultWrapper. true for a successful write query, ResultWrapper object
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* for a successful read query, or false on failure if $tempIgnore set
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* @throws DBQueryError Thrown when the database returns an error of any kind
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*/
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public function query( $sql, $fname = '', $tempIgnore = false ) {
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@ -672,9 +722,6 @@ abstract class DatabaseBase implements DatabaseType {
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# generalizeSQL will probably cut down the query to reasonable
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# logging size most of the time. The substr is really just a sanity check.
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# Who's been wasting my precious column space? -- TS
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# $profName = 'query: ' . $fname . ' ' . substr( DatabaseBase::generalizeSQL( $sql ), 0, 255 );
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if ( $isMaster ) {
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$queryProf = 'query-m: ' . substr( DatabaseBase::generalizeSQL( $sql ), 0, 255 );
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$totalProf = 'DatabaseBase::query-master';
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@ -689,34 +736,30 @@ abstract class DatabaseBase implements DatabaseType {
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$this->mLastQuery = $sql;
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if ( !$this->mDoneWrites && $this->isWriteQuery( $sql ) ) {
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// Set a flag indicating that writes have been done
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# Set a flag indicating that writes have been done
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wfDebug( __METHOD__ . ": Writes done: $sql\n" );
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$this->mDoneWrites = true;
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}
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# Add a comment for easy SHOW PROCESSLIST interpretation
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# if ( $fname ) {
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global $wgUser;
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if ( is_object( $wgUser ) && $wgUser->isItemLoaded( 'name' ) ) {
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$userName = $wgUser->getName();
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if ( mb_strlen( $userName ) > 15 ) {
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$userName = mb_substr( $userName, 0, 15 ) . '...';
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}
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$userName = str_replace( '/', '', $userName );
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} else {
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$userName = '';
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global $wgUser;
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if ( is_object( $wgUser ) && $wgUser->isItemLoaded( 'name' ) ) {
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$userName = $wgUser->getName();
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if ( mb_strlen( $userName ) > 15 ) {
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$userName = mb_substr( $userName, 0, 15 ) . '...';
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}
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$commentedSql = preg_replace( '/\s/', " /* $fname $userName */ ", $sql, 1 );
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# } else {
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# $commentedSql = $sql;
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# }
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$userName = str_replace( '/', '', $userName );
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} else {
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$userName = '';
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}
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$commentedSql = preg_replace( '/\s/', " /* $fname $userName */ ", $sql, 1 );
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# If DBO_TRX is set, start a transaction
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if ( ( $this->mFlags & DBO_TRX ) && !$this->trxLevel() &&
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$sql != 'BEGIN' && $sql != 'COMMIT' && $sql != 'ROLLBACK' ) {
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// avoid establishing transactions for SHOW and SET statements too -
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// that would delay transaction initializations to once connection
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// is really used by application
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# avoid establishing transactions for SHOW and SET statements too -
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# that would delay transaction initializations to once connection
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# is really used by application
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$sqlstart = substr( $sql, 0, 10 ); // very much worth it, benchmark certified(tm)
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if ( strpos( $sqlstart, "SHOW " ) !== 0 and strpos( $sqlstart, "SET " ) !== 0 )
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$this->begin();
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@ -778,6 +821,9 @@ abstract class DatabaseBase implements DatabaseType {
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}
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/**
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* Report a query error. Log the error, and if neither the object ignore
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* flag nor the $tempIgnore flag is set, throw a DBQueryError.
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*
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* @param $error String
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* @param $errno Integer
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* @param $sql String
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@ -809,6 +855,10 @@ abstract class DatabaseBase implements DatabaseType {
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* & = filename; reads the file and inserts as a blob
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* (we don't use this though...)
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*
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* This function should not be used directly by new code outside of the
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* database classes. The query wrapper functions (select() etc.) should be
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* used instead.
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*
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* @return array
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*/
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function prepare( $sql, $func = 'DatabaseBase::prepare' ) {
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@ -818,6 +868,9 @@ abstract class DatabaseBase implements DatabaseType {
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return array( 'query' => $sql, 'func' => $func );
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}
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/**
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* Free a prepared query, generated by prepare().
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*/
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function freePrepared( $prepared ) {
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/* No-op by default */
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}
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@ -844,6 +897,11 @@ abstract class DatabaseBase implements DatabaseType {
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/**
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* Prepare & execute an SQL statement, quoting and inserting arguments
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* in the appropriate places.
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*
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* This function should not be used directly by new code outside of the
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* database classes. The query wrapper functions (select() etc.) should be
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* used instead.
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*
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* @param $query String
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* @param $args ...
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*
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@ -909,17 +967,18 @@ abstract class DatabaseBase implements DatabaseType {
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}
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/**
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* Free a result object
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* Free a result object returned by query() or select(). It's usually not
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* necessary to call this, just use unset() or let the variable holding
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* the result object go out of scope.
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*
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* @param $res Mixed: A SQL result
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*/
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function freeResult( $res ) {
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# Stub. Might not really need to be overridden, since results should
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# be freed by PHP when the variable goes out of scope anyway.
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}
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/**
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* Simple UPDATE wrapper
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* Usually aborts on failure
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* Simple UPDATE wrapper.
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* Usually throws a DBQueryError on failure.
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* If errors are explicitly ignored, returns success
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*
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* This function exists for historical reasons, DatabaseBase::update() has a more standard
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@ -936,11 +995,25 @@ abstract class DatabaseBase implements DatabaseType {
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}
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/**
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* Simple SELECT wrapper, returns a single field, input must be encoded
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* Usually aborts on failure
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* If errors are explicitly ignored, returns FALSE on failure
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* A SELECT wrapper which returns a single field from a single result row.
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*
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* Usually throws a DBQueryError on failure. If errors are explicitly
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* ignored, returns false on failure.
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*
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* If no result rows are returned from the query, false is returned.
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*
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* @param $table Table name. See DatabaseBase::select() for details.
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* @param $var The field name to select. This must be a valid SQL
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* fragment: do not use unvalidated user input.
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* @param $cond The condition array. See DatabaseBase::select() for details.
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* @param $fname The function name of the caller.
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* @param $options The query options. See DatabaseBase::select() for details.
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*
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* @return The value from the field, or false on failure.
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*/
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function selectField( $table, $var, $cond = '', $fname = 'DatabaseBase::selectField', $options = array() ) {
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function selectField( $table, $var, $cond = '', $fname = 'DatabaseBase::selectField',
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$options = array() )
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{
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if ( !is_array( $options ) ) {
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$options = array( $options );
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}
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@ -964,15 +1037,14 @@ abstract class DatabaseBase implements DatabaseType {
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/**
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* Returns an optional USE INDEX clause to go after the table, and a
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* string to go at the end of the query
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*
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* @private
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* string to go at the end of the query.
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*
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* @param $options Array: associative array of options to be turned into
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* an SQL query, valid keys are listed in the function.
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* @return Array
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* @see DatabaseBase::select()
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*/
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function makeSelectOptions( $options ) {
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protected function makeSelectOptions( $options ) {
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$preLimitTail = $postLimitTail = '';
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$startOpts = '';
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@ -1063,37 +1135,165 @@ abstract class DatabaseBase implements DatabaseType {
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}
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/**
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* SELECT wrapper
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* Execute a SELECT query constructed using the various parameters provided.
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* See below for full details of the parameters.
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*
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* @param $table Mixed: Array or string, table name(s) (prefix auto-added)
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* @param $vars Mixed: Array or string, field name(s) to be retrieved
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* @param $conds Mixed: Array or string, condition(s) for WHERE
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* @param $fname String: Calling function name (use __METHOD__) for logs/profiling
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* @param $options Array: Associative array of options (e.g. array('GROUP BY' => 'page_title')),
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* see DatabaseBase::makeSelectOptions code for list of supported stuff
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* @param $join_conds Array: Associative array of table join conditions (optional)
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* (e.g. array( 'page' => array('LEFT JOIN','page_latest=rev_id') )
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* @return ResultWrapper|Bool Database result resource (feed to DatabaseBase::fetchObject
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* or whatever), or false on failure
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* @param $table Table name
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* @param $vars Field names
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* @param $conds Conditions
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* @param $fname Caller function name
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* @param $options Query options
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* @param $join_conds Join conditions
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*
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*
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* @b $table
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*
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* May be either an array of table names, or a single string holding a table
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* name. If an array is given, table aliases can be specified, for example:
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*
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* array( 'a' => 'user' )
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*
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* This includes the user table in the query, with the alias "a" available
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* for use in field names (e.g. a.user_name).
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*
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* All of the table names given here are automatically run through
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* DatabaseBase::tableName(), which causes the table prefix (if any) to be
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* added, and various other table name mappings to be performed.
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*
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*
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* @b $vars
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*
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* May be either a field name or an array of field names. The field names
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* here are complete fragments of SQL, for direct inclusion into the SELECT
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* query. Expressions and aliases may be specified as in SQL, for example:
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*
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* array( 'MAX(rev_id) AS maxrev' )
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*
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* If an expression is given, care must be taken to ensure that it is
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* DBMS-independent.
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*
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*
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* @b $conds
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*
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* May be either a string containing a single condition, or an array of
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* conditions. If an array is given, the conditions constructed from each
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* element are combined with AND.
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*
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* Array elements may take one of two forms:
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*
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* - Elements with a numeric key are interpreted as raw SQL fragments.
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* - Elements with a string key are interpreted as equality conditions,
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* where the key is the field name.
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* - If the value of such an array element is a scalar (such as a
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* string), it will be treated as data and thus quoted appropriately.
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* If it is null, an IS NULL clause will be added.
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* - If the value is an array, an IN(...) clause will be constructed,
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* such that the field name may match any of the elements in the
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* array. The elements of the array will be quoted.
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* - If the field name ends with "!", this is taken as a flag which
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* inverts the comparison, allowing NOT IN clauses to be constructed,
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* for example: array( 'user_id!' => array( 1, 2, 3 ) )
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*
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* Note that expressions are often DBMS-dependent in their syntax.
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* DBMS-independent wrappers are provided for constructing several types of
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* expression commonly used in condition queries. See:
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* - DatabaseBase::buildLike()
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* - DatabaseBase::conditional()
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*
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*
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* @b $options
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*
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* Optional: Array of query options. Boolean options are specified by
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* including them in the array as a string value with a numeric key, for
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* example:
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*
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* array( 'FOR UPDATE' )
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*
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* The supported options are:
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*
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* - OFFSET: Skip this many rows at the start of the result set. OFFSET
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* with LIMIT can theoretically be used for paging through a result set,
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* but this is discouraged in MediaWiki for performance reasons.
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*
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* - LIMIT: Integer: return at most this many rows. The rows are sorted
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* and then the first rows are taken until the limit is reached. LIMIT
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* is applied to a result set after OFFSET.
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*
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* - FOR UPDATE: Boolean: lock the returned rows so that they can't be
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* changed until the next COMMIT.
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*
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* - DISTINCT: Boolean: return only unique result rows.
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*
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* - GROUP BY: May be either an SQL fragment string naming a field or
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* expression to group by, or an array of such SQL fragments.
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*
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* - HAVING: A string containing a HAVING clause.
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*
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* - ORDER BY: May be either an SQL fragment giving a field name or
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* expression to order by, or an array of such SQL fragments.
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*
|
||||
* - USE INDEX: This may be either a string giving the index name to use
|
||||
* for the query, or an array. If it is an associative array, each key
|
||||
* gives the table name (or alias), each value gives the index name to
|
||||
* use for that table. All strings are SQL fragments and so should be
|
||||
* validated by the caller.
|
||||
*
|
||||
* - EXPLAIN: In MySQL, this causes an EXPLAIN SELECT query to be run,
|
||||
* instead of SELECT.
|
||||
*
|
||||
* And also the following boolean MySQL extensions, see the MySQL manual
|
||||
* for documentation:
|
||||
*
|
||||
* - LOCK IN SHARE MODE
|
||||
* - STRAIGHT_JOIN
|
||||
* - HIGH_PRIORITY
|
||||
* - SQL_BIG_RESULT
|
||||
* - SQL_BUFFER_RESULT
|
||||
* - SQL_SMALL_RESULT
|
||||
* - SQL_CALC_FOUND_ROWS
|
||||
* - SQL_CACHE
|
||||
* - SQL_NO_CACHE
|
||||
*
|
||||
*
|
||||
* @b $join_conds
|
||||
*
|
||||
* Optional associative array of table-specific join conditions. In the
|
||||
* most common case, this is unnecessary, since the join condition can be
|
||||
* in $conds. However, it is useful for doing a LEFT JOIN.
|
||||
*
|
||||
* The key of the array contains the table name or alias. The value is an
|
||||
* array with two elements, numbered 0 and 1. The first gives the type of
|
||||
* join, the second is an SQL fragment giving the join condition for that
|
||||
* table. For example:
|
||||
*
|
||||
* array( 'page' => array('LEFT JOIN','page_latest=rev_id') )
|
||||
*
|
||||
* @return ResultWrapper. If the query returned no rows, a ResultWrapper
|
||||
* with no rows in it will be returned. If there was a query error, a
|
||||
* DBQueryError exception will be thrown, except if the "ignore errors"
|
||||
* option was set, in which case false will be returned.
|
||||
*/
|
||||
function select( $table, $vars, $conds = '', $fname = 'DatabaseBase::select', $options = array(), $join_conds = array() ) {
|
||||
function select( $table, $vars, $conds = '', $fname = 'DatabaseBase::select',
|
||||
$options = array(), $join_conds = array() )
|
||||
{
|
||||
$sql = $this->selectSQLText( $table, $vars, $conds, $fname, $options, $join_conds );
|
||||
|
||||
return $this->query( $sql, $fname );
|
||||
}
|
||||
|
||||
/**
|
||||
* SELECT wrapper
|
||||
* The equivalent of DatabaseBase::select() except that the constructed SQL
|
||||
* is returned, instead of being immediately executed.
|
||||
*
|
||||
* @param $table Mixed: Array or string, table name(s) (prefix auto-added). Array keys are table aliases (optional)
|
||||
* @param $vars Mixed: Array or string, field name(s) to be retrieved
|
||||
* @param $conds Mixed: Array or string, condition(s) for WHERE
|
||||
* @param $fname String: Calling function name (use __METHOD__) for logs/profiling
|
||||
* @param $options Array: Associative array of options (e.g. array('GROUP BY' => 'page_title')),
|
||||
* see DatabaseBase::makeSelectOptions code for list of supported stuff
|
||||
* @param $join_conds Array: Associative array of table join conditions (optional)
|
||||
* (e.g. array( 'page' => array('LEFT JOIN','page_latest=rev_id') )
|
||||
* @return string, the SQL text
|
||||
* @param $table Table name
|
||||
* @param $vars Field names
|
||||
* @param $conds Conditions
|
||||
* @param $fname Caller function name
|
||||
* @param $options Query options
|
||||
* @param $join_conds Join conditions
|
||||
*
|
||||
* @return SQL query string.
|
||||
* @see DatabaseBase::select()
|
||||
*/
|
||||
function selectSQLText( $table, $vars, $conds = '', $fname = 'DatabaseBase::select', $options = array(), $join_conds = array() ) {
|
||||
if ( is_array( $vars ) ) {
|
||||
|
|
@ -1144,24 +1344,22 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* Single row SELECT wrapper
|
||||
* Aborts or returns FALSE on error
|
||||
* Single row SELECT wrapper. Equivalent to DatabaseBase::select(), except
|
||||
* that a single row object is returned. If the query returns no rows,
|
||||
* false is returned.
|
||||
*
|
||||
* @param $table String: table name
|
||||
* @param $vars String: the selected variables
|
||||
* @param $conds Array: a condition map, terms are ANDed together.
|
||||
* Items with numeric keys are taken to be literal conditions
|
||||
* Takes an array of selected variables, and a condition map, which is ANDed
|
||||
* e.g: selectRow( "page", array( "page_id" ), array( "page_namespace" =>
|
||||
* NS_MAIN, "page_title" => "Astronomy" ) ) would return an object where
|
||||
* $obj- >page_id is the ID of the Astronomy article
|
||||
* @param $fname String: Calling function name
|
||||
* @param $options Array
|
||||
* @param $join_conds Array
|
||||
* @param $table Table name
|
||||
* @param $vars Field names
|
||||
* @param $conds Conditions
|
||||
* @param $fname Caller function name
|
||||
* @param $options Query options
|
||||
* @param $join_conds Join conditions
|
||||
*
|
||||
* @return ResultWrapper|Bool
|
||||
* @return ResultWrapper or bool
|
||||
*/
|
||||
function selectRow( $table, $vars, $conds, $fname = 'DatabaseBase::selectRow', $options = array(), $join_conds = array() ) {
|
||||
function selectRow( $table, $vars, $conds, $fname = 'DatabaseBase::selectRow',
|
||||
$options = array(), $join_conds = array() )
|
||||
{
|
||||
$options['LIMIT'] = 1;
|
||||
$res = $this->select( $table, $vars, $conds, $fname, $options, $join_conds );
|
||||
|
||||
|
|
@ -1179,10 +1377,17 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* Estimate rows in dataset
|
||||
* Returns estimated count - not necessarily an accurate estimate across different databases,
|
||||
* so use sparingly
|
||||
* Takes same arguments as DatabaseBase::select()
|
||||
* Estimate rows in dataset.
|
||||
*
|
||||
* MySQL allows you to estimate the number of rows that would be returned
|
||||
* by a SELECT query, using EXPLAIN SELECT. The estimate is provided using
|
||||
* index cardinality statistics, and is notoriously inaccurate, especially
|
||||
* when large numbers of rows have recently been added or deleted.
|
||||
*
|
||||
* For DBMSs that don't support fast result size estimation, this function
|
||||
* will actually perform the SELECT COUNT(*).
|
||||
*
|
||||
* Takes the same arguments as DatabaseBase::select().
|
||||
*
|
||||
* @param $table String: table name
|
||||
* @param $vars Array: unused
|
||||
|
|
@ -1191,7 +1396,9 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
* @param $options Array: options for select
|
||||
* @return Integer: row count
|
||||
*/
|
||||
public function estimateRowCount( $table, $vars = '*', $conds = '', $fname = 'DatabaseBase::estimateRowCount', $options = array() ) {
|
||||
public function estimateRowCount( $table, $vars = '*', $conds = '',
|
||||
$fname = 'DatabaseBase::estimateRowCount', $options = array() )
|
||||
{
|
||||
$rows = 0;
|
||||
$res = $this->select ( $table, 'COUNT(*) AS rowcount', $conds, $fname, $options );
|
||||
|
||||
|
|
@ -1245,7 +1452,7 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
|
||||
/**
|
||||
* Determines whether an index exists
|
||||
* Usually aborts on failure
|
||||
* Usually throws a DBQueryError on failure
|
||||
* If errors are explicitly ignored, returns NULL on failure
|
||||
*
|
||||
* @return bool|null
|
||||
|
|
@ -1305,26 +1512,45 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* Helper for DatabaseBase::insert().
|
||||
*
|
||||
* @param $options array
|
||||
* @return string
|
||||
*/
|
||||
function makeInsertOptions( $options ) {
|
||||
protected function makeInsertOptions( $options ) {
|
||||
return implode( ' ', $options );
|
||||
}
|
||||
|
||||
/**
|
||||
* INSERT wrapper, inserts an array into a table
|
||||
* INSERT wrapper, inserts an array into a table.
|
||||
*
|
||||
* $a may be a single associative array, or an array of these with numeric keys, for
|
||||
* multi-row insert.
|
||||
* $a may be either:
|
||||
*
|
||||
* Usually aborts on failure
|
||||
* If errors are explicitly ignored, returns success
|
||||
* - A single associative array. The array keys are the field names, and
|
||||
* the values are the values to insert. The values are treated as data
|
||||
* and will be quoted appropriately. If NULL is inserted, this will be
|
||||
* converted to a database NULL.
|
||||
* - An array with numeric keys, holding a list of associative arrays.
|
||||
* This causes a multi-row INSERT on DBMSs that support it. The keys in
|
||||
* each subarray must be identical to each other, and in the same order.
|
||||
*
|
||||
* @param $table String: table name (prefix auto-added)
|
||||
* @param $a Array: Array of rows to insert
|
||||
* @param $fname String: Calling function name (use __METHOD__) for logs/profiling
|
||||
* @param $options Mixed: Associative array of options
|
||||
* Usually throws a DBQueryError on failure. If errors are explicitly ignored,
|
||||
* returns success.
|
||||
*
|
||||
* $options is an array of options, with boolean options encoded as values
|
||||
* with numeric keys, in the same style as $options in
|
||||
* DatabaseBase::select(). Supported options are:
|
||||
*
|
||||
* - IGNORE: Boolean: if present, duplicate key errors are ignored, and
|
||||
* any rows which cause duplicate key errors are not inserted. It's
|
||||
* possible to determine how many rows were successfully inserted using
|
||||
* DatabaseBase::affectedRows().
|
||||
*
|
||||
* @param $table Table name. This will be passed through
|
||||
* DatabaseBase::tableName().
|
||||
* @param $a Array of rows to insert
|
||||
* @param $fname Calling function name (use __METHOD__) for logs/profiling
|
||||
* @param $options Array of options
|
||||
*
|
||||
* @return bool
|
||||
*/
|
||||
|
|
@ -1373,11 +1599,10 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
/**
|
||||
* Make UPDATE options for the DatabaseBase::update function
|
||||
*
|
||||
* @private
|
||||
* @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 );
|
||||
}
|
||||
|
|
@ -1396,15 +1621,26 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* UPDATE wrapper, takes a condition array and a SET array
|
||||
* UPDATE wrapper. Takes a condition array and a SET array.
|
||||
*
|
||||
* @param $table String: The table to UPDATE
|
||||
* @param $values Array: An array of values to SET
|
||||
* @param $conds Array: An array of conditions (WHERE). Use '*' to update all rows.
|
||||
* @param $fname String: The Class::Function calling this function
|
||||
* (for the log)
|
||||
* @param $options Array: An array of UPDATE options, can be one or
|
||||
* more of IGNORE, LOW_PRIORITY
|
||||
* @param $table The name of the table to UPDATE. This will be passed through
|
||||
* DatabaseBase::tableName().
|
||||
*
|
||||
* @param $values Array: An array of values to SET. For each array element,
|
||||
* the key gives the field name, and the value gives the data
|
||||
* to set that field to. The data will be quoted by
|
||||
* DatabaseBase::addQuotes().
|
||||
*
|
||||
* @param $conds Array: An array of conditions (WHERE). See
|
||||
* DatabaseBase::select() for the details of the format of
|
||||
* condition arrays. Use '*' to update all rows.
|
||||
*
|
||||
* @param $fname String: The function name of the caller (from __METHOD__),
|
||||
* for logging and profiling.
|
||||
*
|
||||
* @param $options Array: An array of UPDATE options, can be:
|
||||
* - IGNORE: Ignore unique key conflicts
|
||||
* - LOW_PRIORITY: MySQL-specific, see MySQL manual.
|
||||
* @return Boolean
|
||||
*/
|
||||
function update( $table, $values, $conds, $fname = 'DatabaseBase::update', $options = array() ) {
|
||||
|
|
@ -1421,18 +1657,21 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
|
||||
/**
|
||||
* Makes an encoded list of strings from an array
|
||||
* @param $a Array
|
||||
* @param $mode int
|
||||
* LIST_COMMA - comma separated, no field names
|
||||
* LIST_AND - ANDed WHERE clause (without the WHERE)
|
||||
* LIST_OR - ORed WHERE clause (without the WHERE)
|
||||
* LIST_SET - comma separated with field names, like a SET clause
|
||||
* LIST_NAMES - comma separated field names
|
||||
* @param $a Array containing the data
|
||||
* @param $mode:
|
||||
* - LIST_COMMA: comma separated, no field names
|
||||
* - LIST_AND: ANDed WHERE clause (without the WHERE). See
|
||||
* the documentation for $conds in DatabaseBase::select().
|
||||
* - LIST_OR: ORed WHERE clause (without the WHERE)
|
||||
* - LIST_SET: comma separated with field names, like a SET clause
|
||||
* - LIST_NAMES: comma separated field names
|
||||
*
|
||||
* In LIST_AND or LIST_OR modes, you can suffix a field with an exclamation
|
||||
* mark to generate a 'NOT IN' structure.
|
||||
*
|
||||
* Example:
|
||||
* $db->makeList( array( 'field!' => array( 1,2,3 ) );
|
||||
*
|
||||
* outputs:
|
||||
* 'field' NOT IN ('1', '2', '3' );
|
||||
|
||||
|
|
@ -1510,7 +1749,8 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
* Build a partial where clause from a 2-d array such as used for LinkBatch.
|
||||
* The keys on each level may be either integers or strings.
|
||||
*
|
||||
* @param $data Array: organized as 2-d array(baseKeyVal => array(subKeyVal => <ignored>, ...), ...)
|
||||
* @param $data Array: organized as 2-d
|
||||
* array(baseKeyVal => array(subKeyVal => <ignored>, ...), ...)
|
||||
* @param $baseKey String: field name to match the base-level keys to (eg 'pl_namespace')
|
||||
* @param $subKey String: field name to match the sub-level keys to (eg 'pl_title')
|
||||
* @return Mixed: string SQL fragment, or false if no items in array.
|
||||
|
|
@ -2003,24 +2243,31 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* DELETE where the condition is a join
|
||||
* MySQL overrides this to use a multi-table DELETE syntax, in other databases we use sub-selects
|
||||
* DELETE where the condition is a join.
|
||||
*
|
||||
* For safety, an empty $conds will not delete everything. If you want to delete all rows where the
|
||||
* join condition matches, set $conds='*'
|
||||
* MySQL overrides this to use a multi-table DELETE syntax, in other databases
|
||||
* we use sub-selects
|
||||
*
|
||||
* DO NOT put the join condition in $conds
|
||||
* For safety, an empty $conds will not delete everything. If you want to
|
||||
* delete all rows where the join condition matches, set $conds='*'.
|
||||
*
|
||||
* @param $delTable String: The table to delete from.
|
||||
* @param $joinTable String: The other table.
|
||||
* @param $delVar String: The variable to join on, in the first table.
|
||||
* @param $joinVar String: The variable to join on, in the second table.
|
||||
* @param $conds Array: Condition array of field names mapped to variables, ANDed together in the WHERE clause
|
||||
* @param $fname String: Calling function name (use __METHOD__) for logs/profiling
|
||||
* DO NOT put the join condition in $conds.
|
||||
*
|
||||
* @param $delTable String: The table to delete from.
|
||||
* @param $joinTable String: The other table.
|
||||
* @param $delVar String: The variable to join on, in the first table.
|
||||
* @param $joinVar String: The variable to join on, in the second table.
|
||||
* @param $conds Array: Condition array of field names mapped to variables,
|
||||
* ANDed together in the WHERE clause
|
||||
* @param $fname String: Calling function name (use __METHOD__) for
|
||||
* logs/profiling
|
||||
*/
|
||||
function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'DatabaseBase::deleteJoin' ) {
|
||||
function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds,
|
||||
$fname = 'DatabaseBase::deleteJoin' )
|
||||
{
|
||||
if ( !$conds ) {
|
||||
throw new DBUnexpectedError( $this, 'DatabaseBase::deleteJoin() called with empty $conds' );
|
||||
throw new DBUnexpectedError( $this,
|
||||
'DatabaseBase::deleteJoin() called with empty $conds' );
|
||||
}
|
||||
|
||||
$delTable = $this->tableName( $delTable );
|
||||
|
|
@ -2059,16 +2306,21 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
* MySQL's LOW_PRIORITY. If no such feature exists, return an empty
|
||||
* string and nothing bad should happen.
|
||||
*
|
||||
* @return string Returns the text of the low priority option if it is supported, or a blank string otherwise
|
||||
* @return string Returns the text of the low priority option if it is
|
||||
* supported, or a blank string otherwise
|
||||
*/
|
||||
function lowPriorityOption() {
|
||||
return '';
|
||||
}
|
||||
|
||||
/**
|
||||
* DELETE query wrapper
|
||||
* DELETE query wrapper.
|
||||
*
|
||||
* Use $conds == "*" to delete all rows
|
||||
* @param $table Table name
|
||||
* @param $conds Condition array. See $conds in DatabaseBase::select() for
|
||||
* the format. Use $conds == "*" to delete all rows
|
||||
*
|
||||
* @return bool
|
||||
*/
|
||||
function delete( $table, $conds, $fname = 'DatabaseBase::delete' ) {
|
||||
if ( !$conds ) {
|
||||
|
|
@ -2086,15 +2338,33 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* INSERT SELECT wrapper
|
||||
* $varMap must be an associative array of the form array( 'dest1' => 'source1', ...)
|
||||
* Source items may be literals rather than field names, but strings should be quoted with DatabaseBase::addQuotes()
|
||||
* $conds may be "*" to copy the whole table
|
||||
* srcTable may be an array of tables.
|
||||
* INSERT SELECT wrapper. Takes data from a SELECT query and inserts it
|
||||
* into another table.
|
||||
*
|
||||
* @param $destTable The table name to insert into
|
||||
* @param $srcTable May be either a table name, or an array of table names
|
||||
* to include in a join.
|
||||
*
|
||||
* @param $varMap must be an associative array of the form
|
||||
* array( 'dest1' => 'source1', ...). Source items may be literals
|
||||
* rather than field names, but strings should be quoted with
|
||||
* DatabaseBase::addQuotes()
|
||||
*
|
||||
* @param $conds Condition array. See $conds in DatabaseBase::select() for
|
||||
* the details of the format of condition arrays. May be "*" to copy the
|
||||
* whole table.
|
||||
*
|
||||
* @param $fname The function name of the caller, from __METHOD__
|
||||
*
|
||||
* @param $insertOptions Options for the INSERT part of the query, see
|
||||
* DatabaseBase::insert() for details.
|
||||
* @param $selectOptions Options for the SELECT part of the query, see
|
||||
* DatabaseBase::select() for details.
|
||||
*
|
||||
* @return ResultWrapper
|
||||
*/
|
||||
function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'DatabaseBase::insertSelect',
|
||||
function insertSelect( $destTable, $srcTable, $varMap, $conds,
|
||||
$fname = 'DatabaseBase::insertSelect',
|
||||
$insertOptions = array(), $selectOptions = array() )
|
||||
{
|
||||
$destTable = $this->tableName( $destTable );
|
||||
|
|
@ -2436,8 +2706,11 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
* @param $fname String: calling function name
|
||||
* @return Boolean: true if operation was successful
|
||||
*/
|
||||
function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = 'DatabaseBase::duplicateTableStructure' ) {
|
||||
throw new MWException( 'DatabaseBase::duplicateTableStructure is not implemented in descendant class' );
|
||||
function duplicateTableStructure( $oldName, $newName, $temporary = false,
|
||||
$fname = 'DatabaseBase::duplicateTableStructure' )
|
||||
{
|
||||
throw new MWException(
|
||||
'DatabaseBase::duplicateTableStructure is not implemented in descendant class' );
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -2451,7 +2724,11 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* Return MW-style timestamp used for MySQL schema
|
||||
* Convert a timestamp in one of the formats accepted by wfTimestamp()
|
||||
* to the format used for inserting into timestamp fields in this DBMS.
|
||||
*
|
||||
* The result is unquoted, and needs to be passed through addQuotes()
|
||||
* before it can be included in raw SQL.
|
||||
*
|
||||
* @return string
|
||||
*/
|
||||
|
|
@ -2460,7 +2737,13 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* Local database timestamp format or null
|
||||
* Convert a timestamp in one of the formats accepted by wfTimestamp()
|
||||
* to the format used for inserting into timestamp fields in this DBMS. If
|
||||
* NULL is input, it is passed through, allowing NULL values to be inserted
|
||||
* into timestamp fields.
|
||||
*
|
||||
* The result is unquoted, and needs to be passed through addQuotes()
|
||||
* before it can be included in raw SQL.
|
||||
*
|
||||
* @return string
|
||||
*/
|
||||
|
|
@ -2473,11 +2756,12 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* @todo document
|
||||
*
|
||||
* @return ResultWrapper
|
||||
* Take the result from a query, and wrap it in a ResultWrapper if
|
||||
* necessary. Boolean values are passed through as is, to indicate success
|
||||
* of write queries or failure. ResultWrapper objects are also passed
|
||||
* through.
|
||||
*/
|
||||
function resultObject( $result ) {
|
||||
protected function resultObject( $result ) {
|
||||
if ( empty( $result ) ) {
|
||||
return false;
|
||||
} elseif ( $result instanceof ResultWrapper ) {
|
||||
|
|
@ -2541,10 +2825,21 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Some DBMSs have a special format for inserting into blob fields, they
|
||||
* don't allow simple quoted strings to be inserted. To insert into such
|
||||
* a field, pass the data through this function before passing it to
|
||||
* DatabaseBase::insert().
|
||||
*/
|
||||
function encodeBlob( $b ) {
|
||||
return $b;
|
||||
}
|
||||
|
||||
/**
|
||||
* Some DBMSs return a special placeholder object representing blob fields
|
||||
* in result objects. Pass the object through this function to return the
|
||||
* original string.
|
||||
*/
|
||||
function decodeBlob( $b ) {
|
||||
return $b;
|
||||
}
|
||||
|
|
@ -2561,12 +2856,15 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
|
||||
/**
|
||||
* Read and execute SQL commands from a file.
|
||||
* Returns true on success, error string or exception on failure (depending on object's error ignore settings)
|
||||
*
|
||||
* Returns true on success, error string or exception on failure (depending
|
||||
* on object's error ignore settings).
|
||||
*
|
||||
* @param $filename String: File name to open
|
||||
* @param $lineCallback Callback: Optional function called before reading each line
|
||||
* @param $resultCallback Callback: Optional function called for each MySQL result
|
||||
* @param $fname String: Calling function name or false if name should be generated dynamically
|
||||
* using $filename
|
||||
* @param $fname String: Calling function name or false if name should be
|
||||
* generated dynamically using $filename
|
||||
*/
|
||||
function sourceFile( $filename, $lineCallback = false, $resultCallback = false, $fname = false ) {
|
||||
wfSuppressWarnings();
|
||||
|
|
@ -2625,14 +2923,19 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* Read and execute commands from an open file handle
|
||||
* Returns true on success, error string or exception on failure (depending on object's error ignore settings)
|
||||
* Read and execute commands from an open file handle.
|
||||
*
|
||||
* Returns true on success, error string or exception on failure (depending
|
||||
* on object's error ignore settings).
|
||||
*
|
||||
* @param $fp Resource: File handle
|
||||
* @param $lineCallback Callback: Optional function called before reading each line
|
||||
* @param $resultCallback Callback: Optional function called for each MySQL result
|
||||
* @param $fname String: Calling function name
|
||||
*/
|
||||
function sourceStream( $fp, $lineCallback = false, $resultCallback = false, $fname = 'DatabaseBase::sourceStream' ) {
|
||||
function sourceStream( $fp, $lineCallback = false, $resultCallback = false,
|
||||
$fname = 'DatabaseBase::sourceStream' )
|
||||
{
|
||||
$cmd = "";
|
||||
$done = false;
|
||||
$dollarquote = false;
|
||||
|
|
@ -2699,15 +3002,18 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
}
|
||||
|
||||
/**
|
||||
* Database independent variable replacement, replaces a set of variables
|
||||
* in a sql statement with their contents as given by $this->getSchemaVars().
|
||||
* Supports '{$var}' `{$var}` and / *$var* / (without the spaces) style variables
|
||||
* Database independent variable replacement. Replaces a set of variables
|
||||
* in an SQL statement with their contents as given by $this->getSchemaVars().
|
||||
*
|
||||
* '{$var}' should be used for text and is passed through the database's addQuotes method
|
||||
* `{$var}` should be used for identifiers (eg: table and database names), it is passed through
|
||||
* the database's addIdentifierQuotes method which can be overridden if the database
|
||||
* uses something other than backticks.
|
||||
* / *$var* / is just encoded, besides traditional dbprefix and tableoptions it's use should be avoided
|
||||
* Supports '{$var}' `{$var}` and / *$var* / (without the spaces) style variables.
|
||||
*
|
||||
* - '{$var}' should be used for text and is passed through the database's
|
||||
* addQuotes method.
|
||||
* - `{$var}` should be used for identifiers (eg: table and database names),
|
||||
* it is passed through the database's addIdentifierQuotes method which
|
||||
* can be overridden if the database uses something other than backticks.
|
||||
* - / *$var* / is just encoded, besides traditional table prefix and
|
||||
* table options its use should be avoided.
|
||||
*
|
||||
* @param $ins String: SQL statement to replace variables in
|
||||
* @return String The new SQL statement with variables replaced
|
||||
|
|
@ -2756,6 +3062,7 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
|
||||
/**
|
||||
* Get schema variables to use if none have been set via setSchemaVars().
|
||||
*
|
||||
* Override this in derived classes to provide variables for tables.sql
|
||||
* and SQL patch files.
|
||||
*/
|
||||
|
|
@ -2892,7 +3199,8 @@ abstract class DatabaseBase implements DatabaseType {
|
|||
*
|
||||
* This is a MySQL-specific feature.
|
||||
*
|
||||
* @param $value Mixed: true for allow, false for deny, or "default" to restore the initial value
|
||||
* @param $value Mixed: true for allow, false for deny, or "default" to
|
||||
* restore the initial value
|
||||
*/
|
||||
public function setBigSelects( $value = true ) {
|
||||
// no-op
|
||||
|
|
|
|||
|
|
@ -13,7 +13,7 @@ class BenchmarkDeleteTruncate extends Benchmarker {
|
|||
$dbw = wfGetDB( DB_MASTER );
|
||||
|
||||
$test = $dbw->tableName( 'test' );
|
||||
$dbw->doQuery( "CREATE TABLE IF NOT EXISTS /*_*/$test (
|
||||
$dbw->query( "CREATE TABLE IF NOT EXISTS /*_*/$test (
|
||||
test_id int unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT,
|
||||
text varbinary(255) NOT NULL
|
||||
);" );
|
||||
|
|
@ -70,9 +70,9 @@ class BenchmarkDeleteTruncate extends Benchmarker {
|
|||
*/
|
||||
private function truncate( $dbw ) {
|
||||
$test = $dbw->tableName( 'test' );
|
||||
$dbw->doQuery( "TRUNCATE TABLE $test" );
|
||||
$dbw->query( "TRUNCATE TABLE $test" );
|
||||
}
|
||||
}
|
||||
|
||||
$maintClass = "BenchmarkDeleteTruncate";
|
||||
require_once( RUN_MAINTENANCE_IF_MAIN );
|
||||
require_once( RUN_MAINTENANCE_IF_MAIN );
|
||||
|
|
|
|||
Loading…
Reference in a new issue