const SLOW_WRITE_SEC = 0.500;
const SMALL_WRITE_ROWS = 100;
+ /** @var string Whether lock granularity is on the level of the entire database */
+ const ATTR_DB_LEVEL_LOCKING = 'db-level-locking';
+
/** @var string SQL query */
protected $lastQuery = '';
/** @var float|bool UNIX timestamp of last write query */
return $conn;
}
+ /**
+ * @param string $dbType A possible DB type (sqlite, mysql, postgres,...)
+ * @param string|null $driver Optional name of a specific DB client driver
+ * @return array Map of (Database::ATTRIBUTE_* constant => value) for all such constants
+ * @throws InvalidArgumentException
+ * @since 1.31
+ */
+ final public static function attributesFromType( $dbType, $driver = null ) {
+ static $defaults = [ self::ATTR_DB_LEVEL_LOCKING => false ];
+
+ $class = self::getClass( $dbType, $driver );
+
+ return call_user_func( [ $class, 'getAttributes' ] ) + $defaults;
+ }
+
/**
* @param string $dbType A possible DB type (sqlite, mysql, postgres,...)
* @param string|null $driver Optional name of a specific DB client driver
return $class;
}
+ /**
+ * @return array Map of (Database::ATTRIBUTE_* constant => value
+ * @since 1.31
+ */
+ protected static function getAttributes() {
+ return [];
+ }
+
/**
* Set the PSR-3 logger interface to use for query logging. (The logger
* interfaces for connection logging and error logging can be set with the
list( $startOpts, $useIndex, $preLimitTail, $postLimitTail, $ignoreIndex ) =
$this->makeSelectOptions( $options );
- if ( !empty( $conds ) ) {
- if ( is_array( $conds ) ) {
- $conds = $this->makeList( $conds, self::LIST_AND );
- }
+ if ( is_array( $conds ) ) {
+ $conds = $this->makeList( $conds, self::LIST_AND );
+ }
+
+ if ( $conds === null || $conds === false ) {
+ $this->queryLogger->warning(
+ __METHOD__
+ . ' called from '
+ . $fname
+ . ' with incorrect parameters: $conds must be a string or an array'
+ );
+ $conds = '';
+ }
+
+ if ( $conds === '' ) {
+ $sql = "SELECT $startOpts $vars $from $useIndex $ignoreIndex $preLimitTail";
+ } elseif ( is_string( $conds ) ) {
$sql = "SELECT $startOpts $vars $from $useIndex $ignoreIndex " .
"WHERE $conds $preLimitTail";
} else {
- $sql = "SELECT $startOpts $vars $from $useIndex $ignoreIndex $preLimitTail";
+ throw new DBUnexpectedError( $this, __METHOD__ . ' called with incorrect parameters' );
}
if ( isset( $options['LIMIT'] ) ) {
return '(' . $this->selectSQLText( $table, $fld, $conds, null, [], $join_conds ) . ')';
}
+ public function buildSubstring( $input, $startPosition, $length = null ) {
+ $this->assertBuildSubstringParams( $startPosition, $length );
+ $functionBody = "$input FROM $startPosition";
+ if ( $length !== null ) {
+ $functionBody .= " FOR $length";
+ }
+ return 'SUBSTRING(' . $functionBody . ')';
+ }
+
+ /**
+ * Check type and bounds for parameters to self::buildSubstring()
+ *
+ * All supported databases have substring functions that behave the same for
+ * positive $startPosition and non-negative $length, but behaviors differ when
+ * given 0 or negative $startPosition or negative $length. The simplest
+ * solution to that is to just forbid those values.
+ *
+ * @param int $startPosition
+ * @param int|null $length
+ * @since 1.31
+ */
+ protected function assertBuildSubstringParams( $startPosition, $length ) {
+ if ( !is_int( $startPosition ) || $startPosition <= 0 ) {
+ throw new InvalidArgumentException(
+ '$startPosition must be a positive integer'
+ );
+ }
+ if ( !( is_int( $length ) && $length >= 0 || $length === null ) ) {
+ throw new InvalidArgumentException(
+ '$length must be null or an integer greater than or equal to 0'
+ );
+ }
+ }
+
public function buildStringCast( $field ) {
return $field;
}
+ public function buildIntegerCast( $field ) {
+ return 'CAST( ' . $field . ' AS INTEGER )';
+ }
+
public function databasesAreIndependent() {
return false;
}
}
// We can't separate explicit JOIN clauses with ',', use ' ' for those
- $implicitJoins = !empty( $ret ) ? implode( ',', $ret ) : "";
- $explicitJoins = !empty( $retJOIN ) ? implode( ' ', $retJOIN ) : "";
+ $implicitJoins = $ret ? implode( ',', $ret ) : "";
+ $explicitJoins = $retJOIN ? implode( ' ', $retJOIN ) : "";
// Compile our final table clause
return implode( ' ', [ $implicitJoins, $explicitJoins ] );
$rows = [ $rows ];
}
- $useTrx = !$this->trxLevel;
- if ( $useTrx ) {
- $this->begin( $fname, self::TRANSACTION_INTERNAL );
- }
try {
+ $this->startAtomic( $fname );
$affectedRowCount = 0;
foreach ( $rows as $row ) {
// Delete rows which collide with this one
$this->insert( $table, $row, $fname );
$affectedRowCount += $this->affectedRows();
}
+ $this->endAtomic( $fname );
+ $this->affectedRowCount = $affectedRowCount;
} catch ( Exception $e ) {
- if ( $useTrx ) {
- $this->rollback( $fname, self::FLUSHING_INTERNAL );
- }
+ $this->rollback( $fname, self::FLUSHING_INTERNAL );
throw $e;
}
- if ( $useTrx ) {
- $this->commit( $fname, self::FLUSHING_INTERNAL );
- }
-
- $this->affectedRowCount = $affectedRowCount;
}
/**
}
$affectedRowCount = 0;
- $useTrx = !$this->trxLevel;
- if ( $useTrx ) {
- $this->begin( $fname, self::TRANSACTION_INTERNAL );
- }
try {
+ $this->startAtomic( $fname );
# Update any existing conflicting row(s)
if ( $where !== false ) {
$ok = $this->update( $table, $set, $where, $fname );
# Now insert any non-conflicting row(s)
$ok = $this->insert( $table, $rows, $fname, [ 'IGNORE' ] ) && $ok;
$affectedRowCount += $this->affectedRows();
+ $this->endAtomic( $fname );
+ $this->affectedRowCount = $affectedRowCount;
} catch ( Exception $e ) {
- if ( $useTrx ) {
- $this->rollback( $fname, self::FLUSHING_INTERNAL );
- }
+ $this->rollback( $fname, self::FLUSHING_INTERNAL );
throw $e;
}
- if ( $useTrx ) {
- $this->commit( $fname, self::FLUSHING_INTERNAL );
- }
- $this->affectedRowCount = $affectedRowCount;
return $ok;
}
return $this->query( $sql, $fname );
}
- public function insertSelect(
+ final public function insertSelect(
$destTable, $srcTable, $varMap, $conds,
$fname = __METHOD__, $insertOptions = [], $selectOptions = [], $selectJoinConds = []
) {
- if ( $this->cliMode ) {
+ static $hints = [ 'NO_AUTO_COLUMNS' ];
+
+ $insertOptions = (array)$insertOptions;
+ $selectOptions = (array)$selectOptions;
+
+ if ( $this->cliMode && $this->isInsertSelectSafe( $insertOptions, $selectOptions ) ) {
// For massive migrations with downtime, we don't want to select everything
// into memory and OOM, so do all this native on the server side if possible.
return $this->nativeInsertSelect(
$varMap,
$conds,
$fname,
- $insertOptions,
+ array_diff( $insertOptions, $hints ),
$selectOptions,
$selectJoinConds
);
$varMap,
$conds,
$fname,
- $insertOptions,
+ array_diff( $insertOptions, $hints ),
$selectOptions,
$selectJoinConds
);
}
+ /**
+ * @param array $insertOptions INSERT options
+ * @param array $selectOptions SELECT options
+ * @return bool Whether an INSERT SELECT with these options will be replication safe
+ * @since 1.31
+ */
+ protected function isInsertSelectSafe( array $insertOptions, array $selectOptions ) {
+ return true;
+ }
+
/**
* Implementation of insertSelect() based on select() and insert()
*
$fname = __METHOD__,
$insertOptions = [], $selectOptions = [], $selectJoinConds = []
) {
- $insertOptions = array_diff( (array)$insertOptions, [ 'NO_AUTO_COLUMNS' ] );
-
// For web requests, do a locking SELECT and then INSERT. This puts the SELECT burden
// on only the master (without needing row-based-replication). It also makes it easy to
// know how big the INSERT is going to be.
$this->affectedRowCount = $affectedRowCount;
} else {
$this->rollback( $fname, self::FLUSHING_INTERNAL );
- $this->affectedRowCount = 0;
}
return $ok;
} catch ( Exception $e ) {
$this->rollback( $fname, self::FLUSHING_INTERNAL );
- $this->affectedRowCount = 0;
throw $e;
}
}
if ( !is_array( $insertOptions ) ) {
$insertOptions = [ $insertOptions ];
}
- $insertOptions = array_diff( (array)$insertOptions, [ 'NO_AUTO_COLUMNS' ] );
$insertOptions = $this->makeInsertOptions( $insertOptions );
} catch ( Exception $e ) {
// already logged; let LoadBalancer move on during mass-rollback
}
+
+ $this->affectedRowCount = 0; // for the sake of consistency
}
/**
dépôts / lhc / web / wiklou.git / blobdiff