781 lines
19 KiB
PHP
781 lines
19 KiB
PHP
<?php
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/**
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* @package Joomla.Platform
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* @subpackage Database
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*
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* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE
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*/
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defined('JPATH_PLATFORM') or die;
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/**
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* PostgreSQL import driver.
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*
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* @package Joomla.Platform
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* @subpackage Database
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* @since 12.1
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*/
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class JDatabaseImporterPostgresql extends JDatabaseImporter
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{
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/**
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* @var array An array of cached data.
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* @since 12.1
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*/
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protected $cache = array();
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/**
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* The database connector to use for exporting structure and/or data.
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*
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* @var JDatabaseDriverPostgresql
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* @since 12.1
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*/
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protected $db = null;
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/**
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* The input source.
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*
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* @var mixed
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* @since 12.1
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*/
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protected $from = array();
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/**
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* The type of input format (XML).
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*
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* @var string
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* @since 12.1
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*/
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protected $asFormat = 'xml';
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/**
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* An array of options for the exporter.
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*
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* @var object
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* @since 12.1
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*/
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protected $options = null;
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/**
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* Constructor.
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*
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* Sets up the default options for the exporter.
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*
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* @since 12.1
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*/
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public function __construct()
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{
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$this->options = new stdClass;
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$this->cache = array('columns' => array(), 'keys' => array());
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// Set up the class defaults:
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// Import with only structure
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$this->withStructure();
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// Export as XML.
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$this->asXml();
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// Default destination is a string using $output = (string) $exporter;
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}
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/**
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* Set the output option for the exporter to XML format.
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*
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* @return JDatabaseImporterPostgresql Method supports chaining.
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*
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* @since 12.1
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*/
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public function asXml()
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{
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$this->asFormat = 'xml';
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return $this;
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}
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/**
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* Checks if all data and options are in order prior to exporting.
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*
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* @return JDatabaseImporterPostgresql Method supports chaining.
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*
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* @since 12.1
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* @throws Exception if an error is encountered.
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*/
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public function check()
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{
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// Check if the db connector has been set.
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if (!($this->db instanceof JDatabaseDriverPostgresql))
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{
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throw new Exception('JPLATFORM_ERROR_DATABASE_CONNECTOR_WRONG_TYPE');
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}
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// Check if the tables have been specified.
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if (empty($this->from))
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{
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throw new Exception('JPLATFORM_ERROR_NO_TABLES_SPECIFIED');
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}
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return $this;
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}
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/**
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* Specifies the data source to import.
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*
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* @param mixed $from The data source to import.
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*
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* @return JDatabaseImporterPostgresql Method supports chaining.
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*
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* @since 12.1
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*/
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public function from($from)
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{
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$this->from = $from;
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return $this;
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}
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/**
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* Get the SQL syntax to add a column.
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*
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* @param string $table The table name.
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* @param SimpleXMLElement $field The XML field definition.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getAddColumnSQL($table, SimpleXMLElement $field)
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{
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return 'ALTER TABLE ' . $this->db->quoteName($table) . ' ADD COLUMN ' . $this->getColumnSQL($field);
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}
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/**
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* Get the SQL syntax to add an index.
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*
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* @param SimpleXMLElement $field The XML index definition.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getAddIndexSQL(SimpleXMLElement $field)
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{
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return (string) $field['Query'];
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}
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/**
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* Get alters for table if there is a difference.
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*
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* @param SimpleXMLElement $structure The XML structure of the table.
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*
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* @return array
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*
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* @since 12.1
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*/
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protected function getAlterTableSQL(SimpleXMLElement $structure)
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{
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$table = $this->getRealTableName($structure['name']);
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$oldFields = $this->db->getTableColumns($table);
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$oldKeys = $this->db->getTableKeys($table);
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$oldSequence = $this->db->getTableSequences($table);
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$alters = array();
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// Get the fields and keys from the XML that we are aiming for.
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$newFields = $structure->xpath('field');
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$newKeys = $structure->xpath('key');
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$newSequence = $structure->xpath('sequence');
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/* Sequence section */
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$oldSeq = $this->getSeqLookup($oldSequence);
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$newSequenceLook = $this->getSeqLookup($newSequence);
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foreach ($newSequenceLook as $kSeqName => $vSeq)
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{
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if (isset($oldSeq[$kSeqName]))
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{
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// The field exists, check it's the same.
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$column = $oldSeq[$kSeqName][0];
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/* For older database version that doesn't support these fields use default values */
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if (version_compare($this->db->getVersion(), '9.1.0') < 0)
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{
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$column->Min_Value = '1';
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$column->Max_Value = '9223372036854775807';
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$column->Increment = '1';
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$column->Cycle_option = 'NO';
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$column->Start_Value = '1';
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}
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// Test whether there is a change.
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$change = ((string) $vSeq[0]['Type'] != $column->Type) || ((string) $vSeq[0]['Start_Value'] != $column->Start_Value)
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|| ((string) $vSeq[0]['Min_Value'] != $column->Min_Value) || ((string) $vSeq[0]['Max_Value'] != $column->Max_Value)
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|| ((string) $vSeq[0]['Increment'] != $column->Increment) || ((string) $vSeq[0]['Cycle_option'] != $column->Cycle_option)
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|| ((string) $vSeq[0]['Table'] != $column->Table) || ((string) $vSeq[0]['Column'] != $column->Column)
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|| ((string) $vSeq[0]['Schema'] != $column->Schema) || ((string) $vSeq[0]['Name'] != $column->Name);
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if ($change)
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{
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$alters[] = $this->getChangeSequenceSQL($kSeqName, $vSeq);
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}
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// Unset this field so that what we have left are fields that need to be removed.
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unset($oldSeq[$kSeqName]);
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}
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else
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{
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// The sequence is new
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$alters[] = $this->getAddSequenceSQL($newSequenceLook[$kSeqName][0]);
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}
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}
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// Any sequences left are orphans
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foreach ($oldSeq as $name => $column)
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{
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// Delete the sequence.
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$alters[] = $this->getDropSequenceSQL($name);
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}
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/* Field section */
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// Loop through each field in the new structure.
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foreach ($newFields as $field)
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{
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$fName = (string) $field['Field'];
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if (isset($oldFields[$fName]))
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{
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// The field exists, check it's the same.
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$column = $oldFields[$fName];
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// Test whether there is a change.
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$change = ((string) $field['Type'] != $column->Type) || ((string) $field['Null'] != $column->Null)
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|| ((string) $field['Default'] != $column->Default);
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if ($change)
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{
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$alters[] = $this->getChangeColumnSQL($table, $field);
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}
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// Unset this field so that what we have left are fields that need to be removed.
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unset($oldFields[$fName]);
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}
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else
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{
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// The field is new.
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$alters[] = $this->getAddColumnSQL($table, $field);
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}
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}
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// Any columns left are orphans
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foreach ($oldFields as $name => $column)
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{
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// Delete the column.
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$alters[] = $this->getDropColumnSQL($table, $name);
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}
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/* Index section */
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// Get the lookups for the old and new keys
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$oldLookup = $this->getIdxLookup($oldKeys);
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$newLookup = $this->getIdxLookup($newKeys);
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// Loop through each key in the new structure.
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foreach ($newLookup as $name => $keys)
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{
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// Check if there are keys on this field in the existing table.
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if (isset($oldLookup[$name]))
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{
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$same = true;
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$newCount = count($newLookup[$name]);
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$oldCount = count($oldLookup[$name]);
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// There is a key on this field in the old and new tables. Are they the same?
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if ($newCount == $oldCount)
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{
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for ($i = 0; $i < $newCount; $i++)
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{
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// Check only query field -> different query means different index
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$same = ((string) $newLookup[$name][$i]['Query'] == $oldLookup[$name][$i]->Query);
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if (!$same)
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{
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// Break out of the loop. No need to check further.
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break;
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}
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}
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}
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else
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{
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// Count is different, just drop and add.
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$same = false;
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}
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if (!$same)
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{
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$alters[] = $this->getDropIndexSQL($name);
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$alters[] = (string) $newLookup[$name][0]['Query'];
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}
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// Unset this field so that what we have left are fields that need to be removed.
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unset($oldLookup[$name]);
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}
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else
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{
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// This is a new key.
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$alters[] = (string) $newLookup[$name][0]['Query'];
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}
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}
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// Any keys left are orphans.
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foreach ($oldLookup as $name => $keys)
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{
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if ($oldLookup[$name][0]->is_primary == 'TRUE')
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{
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$alters[] = $this->getDropPrimaryKeySQL($table, $oldLookup[$name][0]->Index);
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}
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else
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{
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$alters[] = $this->getDropIndexSQL($name);
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}
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}
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return $alters;
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}
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/**
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* Get the SQL syntax to drop a sequence.
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*
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* @param string $name The name of the sequence to drop.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getDropSequenceSQL($name)
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{
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return 'DROP SEQUENCE ' . $this->db->quoteName($name);
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}
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/**
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* Get the syntax to add a sequence.
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*
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* @param SimpleXMLElement $field The XML definition for the sequence.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getAddSequenceSQL($field)
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{
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/* For older database version that doesn't support these fields use default values */
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if (version_compare($this->db->getVersion(), '9.1.0') < 0)
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{
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$field['Min_Value'] = '1';
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$field['Max_Value'] = '9223372036854775807';
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$field['Increment'] = '1';
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$field['Cycle_option'] = 'NO';
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$field['Start_Value'] = '1';
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}
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return 'CREATE SEQUENCE ' . (string) $field['Name'] .
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' INCREMENT BY ' . (string) $field['Increment'] . ' MINVALUE ' . $field['Min_Value'] .
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' MAXVALUE ' . (string) $field['Max_Value'] . ' START ' . (string) $field['Start_Value'] .
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(((string) $field['Cycle_option'] == 'NO') ? ' NO' : '') . ' CYCLE' .
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' OWNED BY ' . $this->db->quoteName((string) $field['Schema'] . '.' . (string) $field['Table'] . '.' . (string) $field['Column']);
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}
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/**
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* Get the syntax to alter a sequence.
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*
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* @param SimpleXMLElement $field The XML definition for the sequence.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getChangeSequenceSQL($field)
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{
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/* For older database version that doesn't support these fields use default values */
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if (version_compare($this->db->getVersion(), '9.1.0') < 0)
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{
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$field['Min_Value'] = '1';
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$field['Max_Value'] = '9223372036854775807';
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$field['Increment'] = '1';
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$field['Cycle_option'] = 'NO';
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$field['Start_Value'] = '1';
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}
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return 'ALTER SEQUENCE ' . (string) $field['Name'] .
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' INCREMENT BY ' . (string) $field['Increment'] . ' MINVALUE ' . (string) $field['Min_Value'] .
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' MAXVALUE ' . (string) $field['Max_Value'] . ' START ' . (string) $field['Start_Value'] .
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' OWNED BY ' . $this->db->quoteName((string) $field['Schema'] . '.' . (string) $field['Table'] . '.' . (string) $field['Column']);
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}
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/**
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* Get the syntax to alter a column.
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*
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* @param string $table The name of the database table to alter.
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* @param SimpleXMLElement $field The XML definition for the field.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getChangeColumnSQL($table, SimpleXMLElement $field)
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{
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return 'ALTER TABLE ' . $this->db->quoteName($table) . ' ALTER COLUMN ' . $this->db->quoteName((string) $field['Field']) . ' '
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. $this->getAlterColumnSQL($table, $field);
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}
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/**
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* Get the SQL syntax for a single column that would be included in a table create statement.
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*
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* @param string $table The name of the database table to alter.
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* @param SimpleXMLElement $field The XML field definition.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getAlterColumnSQL($table, $field)
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{
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// TODO Incorporate into parent class and use $this.
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$blobs = array('text', 'smalltext', 'mediumtext', 'largetext');
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$fName = (string) $field['Field'];
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$fType = (string) $field['Type'];
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$fNull = (string) $field['Null'];
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$fDefault = (isset($field['Default']) && $field['Default'] != 'NULL' ) ?
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preg_match('/^[0-9]$/', $field['Default']) ? $field['Default'] : $this->db->quote((string) $field['Default'])
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: null;
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$query = ' TYPE ' . $fType;
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if ($fNull == 'NO')
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{
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if (in_array($fType, $blobs) || $fDefault === null)
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{
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$query .= ",\nALTER COLUMN " . $this->db->quoteName($fName) . ' SET NOT NULL' .
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",\nALTER COLUMN " . $this->db->quoteName($fName) . ' DROP DEFAULT';
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}
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else
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{
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$query .= ",\nALTER COLUMN " . $this->db->quoteName($fName) . ' SET NOT NULL' .
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",\nALTER COLUMN " . $this->db->quoteName($fName) . ' SET DEFAULT ' . $fDefault;
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}
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}
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else
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{
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if ($fDefault !== null)
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{
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$query .= ",\nALTER COLUMN " . $this->db->quoteName($fName) . ' DROP NOT NULL' .
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",\nALTER COLUMN " . $this->db->quoteName($fName) . ' SET DEFAULT ' . $fDefault;
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}
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}
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/* sequence was created in other function, here is associated a default value but not yet owner */
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if (strpos($fDefault, 'nextval') !== false)
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{
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$query .= ";\nALTER SEQUENCE " . $this->db->quoteName($table . '_' . $fName . '_seq') . ' OWNED BY ' . $this->db->quoteName($table . '.' . $fName);
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}
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return $query;
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}
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/**
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* Get the SQL syntax for a single column that would be included in a table create statement.
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*
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* @param SimpleXMLElement $field The XML field definition.
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*
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* @return string
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*
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* @since 12.1
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*/
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protected function getColumnSQL(SimpleXMLElement $field)
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{
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// TODO Incorporate into parent class and use $this.
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$blobs = array('text', 'smalltext', 'mediumtext', 'largetext');
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$fName = (string) $field['Field'];
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$fType = (string) $field['Type'];
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$fNull = (string) $field['Null'];
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$fDefault = (isset($field['Default']) && $field['Default'] != 'NULL' ) ?
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preg_match('/^[0-9]$/', $field['Default']) ? $field['Default'] : $this->db->quote((string) $field['Default'])
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: null;
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/* nextval() as default value means that type field is serial */
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if (strpos($fDefault, 'nextval') !== false)
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{
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$query = $this->db->quoteName($fName) . ' SERIAL';
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}
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else
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{
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$query = $this->db->quoteName($fName) . ' ' . $fType;
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if ($fNull == 'NO')
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{
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if (in_array($fType, $blobs) || $fDefault === null)
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{
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$query .= ' NOT NULL';
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}
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else
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{
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$query .= ' NOT NULL DEFAULT ' . $fDefault;
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}
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}
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else
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{
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if ($fDefault !== null)
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{
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$query .= ' DEFAULT ' . $fDefault;
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}
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}
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}
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return $query;
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}
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/**
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* Get the SQL syntax to drop a column.
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*
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* @param string $table The table name.
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* @param string $name The name of the field to drop.
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*
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* @return string
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*
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* @since 12.1
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*/
|
|
protected function getDropColumnSQL($table, $name)
|
|
{
|
|
return 'ALTER TABLE ' . $this->db->quoteName($table) . ' DROP COLUMN ' . $this->db->quoteName($name);
|
|
}
|
|
|
|
/**
|
|
* Get the SQL syntax to drop an index.
|
|
*
|
|
* @param string $name The name of the key to drop.
|
|
*
|
|
* @return string
|
|
*
|
|
* @since 12.1
|
|
*/
|
|
protected function getDropIndexSQL($name)
|
|
{
|
|
return 'DROP INDEX ' . $this->db->quoteName($name);
|
|
}
|
|
|
|
/**
|
|
* Get the SQL syntax to drop a key.
|
|
*
|
|
* @param string $table The table name.
|
|
* @param string $name The constraint name.
|
|
*
|
|
* @return string
|
|
*
|
|
* @since 12.1
|
|
*/
|
|
protected function getDropPrimaryKeySQL($table, $name)
|
|
{
|
|
return 'ALTER TABLE ONLY ' . $this->db->quoteName($table) . ' DROP CONSTRAINT ' . $this->db->quoteName($name);
|
|
}
|
|
|
|
/**
|
|
* Get the details list of keys for a table.
|
|
*
|
|
* @param array $keys An array of objects that comprise the keys for the table.
|
|
*
|
|
* @return array The lookup array. array({key name} => array(object, ...))
|
|
*
|
|
* @since 12.1
|
|
* @throws Exception
|
|
*/
|
|
protected function getIdxLookup($keys)
|
|
{
|
|
// First pass, create a lookup of the keys.
|
|
$lookup = array();
|
|
|
|
foreach ($keys as $key)
|
|
{
|
|
if ($key instanceof SimpleXMLElement)
|
|
{
|
|
$kName = (string) $key['Index'];
|
|
}
|
|
else
|
|
{
|
|
$kName = $key->Index;
|
|
}
|
|
if (empty($lookup[$kName]))
|
|
{
|
|
$lookup[$kName] = array();
|
|
}
|
|
$lookup[$kName][] = $key;
|
|
}
|
|
|
|
return $lookup;
|
|
}
|
|
|
|
/**
|
|
* Get the details list of sequences for a table.
|
|
*
|
|
* @param array $sequences An array of objects that comprise the sequences for the table.
|
|
*
|
|
* @return array The lookup array. array({key name} => array(object, ...))
|
|
*
|
|
* @since 12.1
|
|
* @throws Exception
|
|
*/
|
|
protected function getSeqLookup($sequences)
|
|
{
|
|
// First pass, create a lookup of the keys.
|
|
$lookup = array();
|
|
|
|
foreach ($sequences as $seq)
|
|
{
|
|
if ($seq instanceof SimpleXMLElement)
|
|
{
|
|
$sName = (string) $seq['Name'];
|
|
}
|
|
else
|
|
{
|
|
$sName = $seq->Name;
|
|
}
|
|
if (empty($lookup[$sName]))
|
|
{
|
|
$lookup[$sName] = array();
|
|
}
|
|
$lookup[$sName][] = $seq;
|
|
}
|
|
|
|
return $lookup;
|
|
}
|
|
|
|
/**
|
|
* Get the real name of the table, converting the prefix wildcard string if present.
|
|
*
|
|
* @param string $table The name of the table.
|
|
*
|
|
* @return string The real name of the table.
|
|
*
|
|
* @since 12.1
|
|
*/
|
|
protected function getRealTableName($table)
|
|
{
|
|
// TODO Incorporate into parent class and use $this.
|
|
$prefix = $this->db->getPrefix();
|
|
|
|
// Replace the magic prefix if found.
|
|
$table = preg_replace('|^#__|', $prefix, $table);
|
|
|
|
return $table;
|
|
}
|
|
|
|
/**
|
|
* Merges the incoming structure definition with the existing structure.
|
|
*
|
|
* @return void
|
|
*
|
|
* @note Currently only supports XML format.
|
|
* @since 12.1
|
|
* @throws Exception on error.
|
|
* @todo If it's not XML convert to XML first.
|
|
*/
|
|
protected function mergeStructure()
|
|
{
|
|
$prefix = $this->db->getPrefix();
|
|
$tables = $this->db->getTableList();
|
|
|
|
if ($this->from instanceof SimpleXMLElement)
|
|
{
|
|
$xml = $this->from;
|
|
}
|
|
else
|
|
{
|
|
$xml = new SimpleXMLElement($this->from);
|
|
}
|
|
|
|
// Get all the table definitions.
|
|
$xmlTables = $xml->xpath('database/table_structure');
|
|
|
|
foreach ($xmlTables as $table)
|
|
{
|
|
// Convert the magic prefix into the real table name.
|
|
$tableName = (string) $table['name'];
|
|
$tableName = preg_replace('|^#__|', $prefix, $tableName);
|
|
|
|
if (in_array($tableName, $tables))
|
|
{
|
|
// The table already exists. Now check if there is any difference.
|
|
if ($queries = $this->getAlterTableSQL($xml->database->table_structure))
|
|
{
|
|
// Run the queries to upgrade the data structure.
|
|
foreach ($queries as $query)
|
|
{
|
|
$this->db->setQuery($query);
|
|
|
|
try
|
|
{
|
|
$this->db->execute();
|
|
}
|
|
catch (RuntimeException $e)
|
|
{
|
|
$this->addLog('Fail: ' . $this->db->getQuery());
|
|
throw $e;
|
|
}
|
|
$this->addLog('Pass: ' . $this->db->getQuery());
|
|
}
|
|
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// This is a new table.
|
|
$query = $this->xmlToCreate($table);
|
|
|
|
$this->db->setQuery($query);
|
|
|
|
try
|
|
{
|
|
$this->db->execute();
|
|
}
|
|
catch (RuntimeException $e)
|
|
{
|
|
$this->addLog('Fail: ' . $this->db->getQuery());
|
|
throw $e;
|
|
}
|
|
$this->addLog('Pass: ' . $this->db->getQuery());
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the database connector to use for exporting structure and/or data from PostgreSQL.
|
|
*
|
|
* @param JDatabaseDriverPostgresql $db The database connector.
|
|
*
|
|
* @return JDatabaseImporterPostgresql Method supports chaining.
|
|
*
|
|
* @since 12.1
|
|
*/
|
|
public function setDbo(JDatabaseDriverPostgresql $db)
|
|
{
|
|
$this->db = $db;
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Sets an internal option to merge the structure based on the input data.
|
|
*
|
|
* @param boolean $setting True to export the structure, false to not.
|
|
*
|
|
* @return JDatabaseImporterPostgresql Method supports chaining.
|
|
*
|
|
* @since 12.1
|
|
*/
|
|
public function withStructure($setting = true)
|
|
{
|
|
$this->options->withStructure = (boolean) $setting;
|
|
|
|
return $this;
|
|
}
|
|
}
|