/** * Creates(if not already created) and returns the corresponding Index object * * @param string $schema database name * @param string $table table name * @param string $index_name index name * * @return Index corresponding Index object */ public static function singleton($schema, $table, $index_name = '') { Index::_loadIndexes($table, $schema); if (!isset(Index::$_registry[$schema][$table][$index_name])) { $index = new Index(); if (mb_strlen($index_name)) { $index->setName($index_name); Index::$_registry[$schema][$table][$index->getName()] = $index; } return $index; } else { return Index::$_registry[$schema][$table][$index_name]; } }
/** * Adds extra indices for reverse foreign keys * This is required for MySQL databases, * and is called from Database::doFinalInitialization() */ public function addExtraIndices() { /** * A collection of indexed columns. The keys is the column name * (concatenated with a comma in the case of multi-col index), the value is * an array with the names of the indexes that index these columns. We use * it to determine which additional indexes must be created for foreign * keys. It could also be used to detect duplicate indexes, but this is not * implemented yet. * @var array */ $_indices = array(); $this->collectIndexedColumns('PRIMARY', $this->getPrimaryKey(), $_indices); $_tableIndices = array_merge($this->getIndices(), $this->getUnices()); foreach ($_tableIndices as $_index) { $this->collectIndexedColumns($_index->getName(), $_index->getColumns(), $_indices); } // we're determining which tables have foreign keys that point to this table, // since MySQL needs an index on any column that is referenced by another table // (yep, MySQL _is_ a PITA) $counter = 0; foreach ($this->getReferrers() as $foreignKey) { $referencedColumns = $foreignKey->getForeignColumnObjects(); $referencedColumnsHash = $this->getColumnList($referencedColumns); if (!array_key_exists($referencedColumnsHash, $_indices)) { // no matching index defined in the schema, so we have to create one $index = new Index(); $index->setName(sprintf('I_referenced_%s_%s', $foreignKey->getName(), ++$counter)); $index->setColumns($referencedColumns); $index->resetColumnSize(); $this->addIndex($index); // Add this new index to our collection, otherwise we might add it again (bug #725) $this->collectIndexedColumns($index->getName(), $referencedColumns, $_indices); } } // we're adding indices for this table foreign keys foreach ($this->getForeignKeys() as $foreignKey) { $localColumns = $foreignKey->getLocalColumnObjects(); $localColumnsHash = $this->getColumnList($localColumns); if (!array_key_exists($localColumnsHash, $_indices)) { // no matching index defined in the schema, so we have to create one. MySQL needs indices on any columns that serve as foreign keys. these are not auto-created prior to 4.1.2 $index = new Index(); $index->setName(substr_replace($foreignKey->getName(), 'FI_', strrpos($foreignKey->getName(), 'FK_'), 3)); $index->setColumns($localColumns); $index->resetColumnSize(); $this->addIndex($index); $this->collectIndexedColumns($index->getName(), $localColumns, $_indices); } } }
* * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * ***************************************************************************/ include "prepend.inc.php"; $Server = getData("Server", "integer"); $User = getData("User"); $Indexname = getData("Indexname"); $html = "<h1> Database " . $DB->Name($Server) . " - Index " . $Indexname . "</h1>"; if ($Indexname) { $ind = new Index($Server); $ind->setOwner($User); $ind->setName($Indexname); $ind->getData(); $html .= "<table border=0><tr><th>Tag</th><th>Value</th></tr>"; $html .= "<tr><td>Name</td><td>" . $ind->name . "</td></tr>"; $html .= "<tr><td>Owner</td><td>" . $ind->owner . "</td></tr>"; $html .= "<tr><td>Table</td><td>" . $ind->table_owner . "." . $ind->table_name . "</td></tr>"; $html .= "<tr><td>Tablespace</td><td>" . $ind->tablespace_name . "</td></tr>"; $html .= "<tr><td>Table Type</td><td>" . $ind->table_type . "</td></tr>"; $html .= "<tr><td>Uniqueness</td><td>" . $ind->uniqueness . "</td></tr>"; $html .= "<tr><td>Initial Trans</td><td>" . $ind->ini_trans . "</td></tr>"; $html .= "<tr><td>Max Trans</td><td>" . $ind->max_trans . "</td></tr>"; $html .= "<tr><td>Initial Extents</td><td>" . $ind->initial_extent . "</td></tr>"; $html .= "<tr><td>Next Extents</td><td>" . $ind->next_extent . "</td></tr>"; $html .= "<tr><td>Min Extents</td><td>" . $ind->min_extents . "</td></tr>"; $html .= "<tr><td>Max Extents</td><td>" . $ind->max_extents . "</td></tr>"; $html .= "<tr><td>% Increase</td><td>" . $ind->pct_increase . "</td></tr>";