diff cake/libs/model/datasources/dbo/dbo_postgres.php @ 0:261e66bd5a0c

hg init
author Shoshi TAMAKI <shoshi@cr.ie.u-ryukyu.ac.jp>
date Sun, 24 Jul 2011 21:08:31 +0900
parents
children
line wrap: on
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cake/libs/model/datasources/dbo/dbo_postgres.php	Sun Jul 24 21:08:31 2011 +0900
@@ -0,0 +1,980 @@
+<?php
+/**
+ * PostgreSQL layer for DBO.
+ *
+ * PHP versions 4 and 5
+ *
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @package       cake
+ * @subpackage    cake.cake.libs.model.datasources.dbo
+ * @since         CakePHP(tm) v 0.9.1.114
+ * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
+ */
+
+/**
+ * PostgreSQL layer for DBO.
+ *
+ * Long description for class
+ *
+ * @package       cake
+ * @subpackage    cake.cake.libs.model.datasources.dbo
+ */
+class DboPostgres extends DboSource {
+
+/**
+ * Driver description
+ *
+ * @var string
+ * @access public
+ */
+	var $description = "PostgreSQL DBO Driver";
+
+/**
+ * Index of basic SQL commands
+ *
+ * @var array
+ * @access protected
+ */
+	var $_commands = array(
+		'begin'    => 'BEGIN',
+		'commit'   => 'COMMIT',
+		'rollback' => 'ROLLBACK'
+	);
+
+/**
+ * Base driver configuration settings.  Merged with user settings.
+ *
+ * @var array
+ * @access protected
+ */
+	var $_baseConfig = array(
+		'persistent' => true,
+		'host' => 'localhost',
+		'login' => 'root',
+		'password' => '',
+		'database' => 'cake',
+		'schema' => 'public',
+		'port' => 5432,
+		'encoding' => ''
+	);
+
+	var $columns = array(
+		'primary_key' => array('name' => 'serial NOT NULL'),
+		'string' => array('name'  => 'varchar', 'limit' => '255'),
+		'text' => array('name' => 'text'),
+		'integer' => array('name' => 'integer', 'formatter' => 'intval'),
+		'float' => array('name' => 'float', 'formatter' => 'floatval'),
+		'datetime' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
+		'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
+		'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'),
+		'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
+		'binary' => array('name' => 'bytea'),
+		'boolean' => array('name' => 'boolean'),
+		'number' => array('name' => 'numeric'),
+		'inet' => array('name'  => 'inet')
+	);
+
+/**
+ * Starting Quote
+ *
+ * @var string
+ * @access public
+ */
+	var $startQuote = '"';
+
+/**
+ * Ending Quote
+ *
+ * @var string
+ * @access public
+ */
+	var $endQuote = '"';
+
+/**
+ * Contains mappings of custom auto-increment sequences, if a table uses a sequence name
+ * other than what is dictated by convention.
+ *
+ * @var array
+ */
+	var $_sequenceMap = array();
+
+/**
+ * Connects to the database using options in the given configuration array.
+ *
+ * @return True if successfully connected.
+ */
+	function connect() {
+		$config = $this->config;
+		$conn  = "host='{$config['host']}' port='{$config['port']}' dbname='{$config['database']}' ";
+		$conn .= "user='{$config['login']}' password='{$config['password']}'";
+
+		if (!$config['persistent']) {
+			$this->connection = pg_connect($conn, PGSQL_CONNECT_FORCE_NEW);
+		} else {
+			$this->connection = pg_pconnect($conn);
+		}
+		$this->connected = false;
+
+		if ($this->connection) {
+			$this->connected = true;
+			$this->_execute("SET search_path TO " . $config['schema']);
+		}
+		if (!empty($config['encoding'])) {
+			$this->setEncoding($config['encoding']);
+		}
+		return $this->connected;
+	}
+
+/**
+ * Check if PostgreSQL is enabled/loaded
+ *
+ * @return boolean
+ */
+	function enabled() {
+		return extension_loaded('pgsql');
+	}
+/**
+ * Disconnects from database.
+ *
+ * @return boolean True if the database could be disconnected, else false
+ */
+	function disconnect() {
+		if ($this->hasResult()) {
+			pg_free_result($this->_result);
+		}
+		if (is_resource($this->connection)) {
+			$this->connected = !pg_close($this->connection);
+		} else {
+			$this->connected = false;
+		}
+		return !$this->connected;
+	}
+
+/**
+ * Executes given SQL statement.
+ *
+ * @param string $sql SQL statement
+ * @return resource Result resource identifier
+ */
+	function _execute($sql) {
+		return pg_query($this->connection, $sql);
+	}
+
+/**
+ * Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
+ *
+ * @return array Array of tablenames in the database
+ */
+	function listSources() {
+		$cache = parent::listSources();
+
+		if ($cache != null) {
+			return $cache;
+		}
+
+		$schema = $this->config['schema'];
+		$sql = "SELECT table_name as name FROM INFORMATION_SCHEMA.tables WHERE table_schema = '{$schema}';";
+		$result = $this->fetchAll($sql, false);
+
+		if (!$result) {
+			return array();
+		} else {
+			$tables = array();
+
+			foreach ($result as $item) {
+				$tables[] = $item[0]['name'];
+			}
+
+			parent::listSources($tables);
+			return $tables;
+		}
+	}
+
+/**
+ * Returns an array of the fields in given table name.
+ *
+ * @param string $tableName Name of database table to inspect
+ * @return array Fields in table. Keys are name and type
+ */
+	function &describe(&$model) {
+		$fields = parent::describe($model);
+		$table = $this->fullTableName($model, false);
+		$this->_sequenceMap[$table] = array();
+
+		if ($fields === null) {
+			$cols = $this->fetchAll(
+				"SELECT DISTINCT column_name AS name, data_type AS type, is_nullable AS null,
+					column_default AS default, ordinal_position AS position, character_maximum_length AS char_length,
+					character_octet_length AS oct_length FROM information_schema.columns
+				WHERE table_name = " . $this->value($table) . " AND table_schema = " .
+				$this->value($this->config['schema'])."  ORDER BY position",
+				false
+			);
+
+			foreach ($cols as $column) {
+				$colKey = array_keys($column);
+
+				if (isset($column[$colKey[0]]) && !isset($column[0])) {
+					$column[0] = $column[$colKey[0]];
+				}
+
+				if (isset($column[0])) {
+					$c = $column[0];
+
+					if (!empty($c['char_length'])) {
+						$length = intval($c['char_length']);
+					} elseif (!empty($c['oct_length'])) {
+						if ($c['type'] == 'character varying') {
+							$length = null;
+							$c['type'] = 'text';
+						} else {
+							$length = intval($c['oct_length']);
+						}
+					} else {
+						$length = $this->length($c['type']);
+					}
+					$fields[$c['name']] = array(
+						'type'    => $this->column($c['type']),
+						'null'    => ($c['null'] == 'NO' ? false : true),
+						'default' => preg_replace(
+							"/^'(.*)'$/",
+							"$1",
+							preg_replace('/::.*/', '', $c['default'])
+						),
+						'length'  => $length
+					);
+					if ($c['name'] == $model->primaryKey) {
+						$fields[$c['name']]['key'] = 'primary';
+						if ($fields[$c['name']]['type'] !== 'string') {
+							$fields[$c['name']]['length'] = 11;
+						}
+					}
+					if (
+						$fields[$c['name']]['default'] == 'NULL' ||
+						preg_match('/nextval\([\'"]?([\w.]+)/', $c['default'], $seq)
+					) {
+						$fields[$c['name']]['default'] = null;
+						if (!empty($seq) && isset($seq[1])) {
+							$this->_sequenceMap[$table][$c['name']] = $seq[1];
+						}
+					}
+					if ($fields[$c['name']]['type'] == 'boolean' && !empty($fields[$c['name']]['default'])) {
+						$fields[$c['name']]['default'] = constant($fields[$c['name']]['default']);
+					}
+				}
+			}
+			$this->__cacheDescription($table, $fields);
+		}
+		if (isset($model->sequence)) {
+			$this->_sequenceMap[$table][$model->primaryKey] = $model->sequence;
+		}
+		return $fields;
+	}
+
+/**
+ * Returns a quoted and escaped string of $data for use in an SQL statement.
+ *
+ * @param string $data String to be prepared for use in an SQL statement
+ * @param string $column The column into which this data will be inserted
+ * @param boolean $read Value to be used in READ or WRITE context
+ * @return string Quoted and escaped
+ * @todo Add logic that formats/escapes data based on column type
+ */
+	function value($data, $column = null, $read = true) {
+
+		$parent = parent::value($data, $column);
+		if ($parent != null) {
+			return $parent;
+		}
+
+		if ($data === null || (is_array($data) && empty($data))) {
+			return 'NULL';
+		}
+		if (empty($column)) {
+			$column = $this->introspectType($data);
+		}
+
+		switch($column) {
+			case 'binary':
+				$data = pg_escape_bytea($data);
+			break;
+			case 'boolean':
+				if ($data === true || $data === 't' || $data === 'true') {
+					return 'TRUE';
+				} elseif ($data === false || $data === 'f' || $data === 'false') {
+					return 'FALSE';
+				}
+				return (!empty($data) ? 'TRUE' : 'FALSE');
+			break;
+			case 'float':
+				if (is_float($data)) {
+					$data = sprintf('%F', $data);
+				}
+			case 'inet':
+			case 'integer':
+			case 'date':
+			case 'datetime':
+			case 'timestamp':
+			case 'time':
+				if ($data === '') {
+					return $read ? 'NULL' : 'DEFAULT';
+				}
+			default:
+				$data = pg_escape_string($data);
+			break;
+		}
+		return "'" . $data . "'";
+	}
+
+/**
+ * Returns a formatted error message from previous database operation.
+ *
+ * @return string Error message
+ */
+	function lastError() {
+		$error = pg_last_error($this->connection);
+		return ($error) ? $error : null;
+	}
+
+/**
+ * Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
+ *
+ * @return integer Number of affected rows
+ */
+	function lastAffected() {
+		return ($this->_result) ? pg_affected_rows($this->_result) : false;
+	}
+
+/**
+ * Returns number of rows in previous resultset. If no previous resultset exists,
+ * this returns false.
+ *
+ * @return integer Number of rows in resultset
+ */
+	function lastNumRows() {
+		return ($this->_result) ? pg_num_rows($this->_result) : false;
+	}
+
+/**
+ * Returns the ID generated from the previous INSERT operation.
+ *
+ * @param string $source Name of the database table
+ * @param string $field Name of the ID database field. Defaults to "id"
+ * @return integer
+ */
+	function lastInsertId($source, $field = 'id') {
+		$seq = $this->getSequence($source, $field);
+		$data = $this->fetchRow("SELECT currval('{$seq}') as max");
+		return $data[0]['max'];
+	}
+
+/**
+ * Gets the associated sequence for the given table/field
+ *
+ * @param mixed $table Either a full table name (with prefix) as a string, or a model object
+ * @param string $field Name of the ID database field. Defaults to "id"
+ * @return string The associated sequence name from the sequence map, defaults to "{$table}_{$field}_seq"
+ */
+	function getSequence($table, $field = 'id') {
+		if (is_object($table)) {
+			$table = $this->fullTableName($table, false);
+		}
+		if (isset($this->_sequenceMap[$table]) && isset($this->_sequenceMap[$table][$field])) {
+			return $this->_sequenceMap[$table][$field];
+		} else {
+			return "{$table}_{$field}_seq";
+		}
+	}
+
+/**
+ * Deletes all the records in a table and drops all associated auto-increment sequences
+ *
+ * @param mixed $table A string or model class representing the table to be truncated
+ * @param integer $reset If -1, sequences are dropped, if 0 (default), sequences are reset,
+ *						and if 1, sequences are not modified
+ * @return boolean	SQL TRUNCATE TABLE statement, false if not applicable.
+ * @access public
+ */
+	function truncate($table, $reset = 0) {
+		if (parent::truncate($table)) {
+			$table = $this->fullTableName($table, false);
+			if (isset($this->_sequenceMap[$table]) && $reset !== 1) {
+				foreach ($this->_sequenceMap[$table] as $field => $sequence) {
+					if ($reset === 0) {
+						$this->execute("ALTER SEQUENCE \"{$sequence}\" RESTART WITH 1");
+					} elseif ($reset === -1) {
+						$this->execute("DROP SEQUENCE IF EXISTS \"{$sequence}\"");
+					}
+				}
+			}
+			return true;
+		}
+		return false;
+	}
+
+/**
+ * Prepares field names to be quoted by parent
+ *
+ * @param string $data
+ * @return string SQL field
+ */
+	function name($data) {
+		if (is_string($data)) {
+			$data = str_replace('"__"', '__', $data);
+		}
+		return parent::name($data);
+	}
+
+/**
+ * Generates the fields list of an SQL query.
+ *
+ * @param Model $model
+ * @param string $alias Alias tablename
+ * @param mixed $fields
+ * @return array
+ */
+	function fields(&$model, $alias = null, $fields = array(), $quote = true) {
+		if (empty($alias)) {
+			$alias = $model->alias;
+		}
+		$fields = parent::fields($model, $alias, $fields, false);
+
+		if (!$quote) {
+			return $fields;
+		}
+		$count = count($fields);
+
+		if ($count >= 1 && strpos($fields[0], 'COUNT(*)') === false) {
+			$result = array();
+			for ($i = 0; $i < $count; $i++) {
+				if (!preg_match('/^.+\\(.*\\)/', $fields[$i]) && !preg_match('/\s+AS\s+/', $fields[$i])) {
+					if (substr($fields[$i], -1) == '*') {
+						if (strpos($fields[$i], '.') !== false && $fields[$i] != $alias . '.*') {
+							$build = explode('.', $fields[$i]);
+							$AssociatedModel = $model->{$build[0]};
+						} else {
+							$AssociatedModel = $model;
+						}
+
+						$_fields = $this->fields($AssociatedModel, $AssociatedModel->alias, array_keys($AssociatedModel->schema()));
+						$result = array_merge($result, $_fields);
+						continue;
+					}
+
+					$prepend = '';
+					if (strpos($fields[$i], 'DISTINCT') !== false) {
+						$prepend = 'DISTINCT ';
+						$fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));
+					}
+
+					if (strrpos($fields[$i], '.') === false) {
+						$fields[$i] = $prepend . $this->name($alias) . '.' . $this->name($fields[$i]) . ' AS ' . $this->name($alias . '__' . $fields[$i]);
+					} else {
+						$build = explode('.', $fields[$i]);
+						$fields[$i] = $prepend . $this->name($build[0]) . '.' . $this->name($build[1]) . ' AS ' . $this->name($build[0] . '__' . $build[1]);
+					}
+				} else {
+					$fields[$i] = preg_replace_callback('/\(([\s\.\w]+)\)/',  array(&$this, '__quoteFunctionField'), $fields[$i]);
+				}
+				$result[] = $fields[$i];
+			}
+			return $result;
+		}
+		return $fields;
+	}
+
+/**
+ * Auxiliary function to quote matched `(Model.fields)` from a preg_replace_callback call
+ *
+ * @param string matched string
+ * @return string quoted strig
+ * @access private
+ */
+	function __quoteFunctionField($match) {
+		$prepend = '';
+		if (strpos($match[1], 'DISTINCT') !== false) {
+			$prepend = 'DISTINCT ';
+			$match[1] = trim(str_replace('DISTINCT', '', $match[1]));
+		}
+		if (strpos($match[1], '.') === false) {
+			$match[1] = $this->name($match[1]);
+		} else {
+			$parts = explode('.', $match[1]);
+			if (!Set::numeric($parts)) {
+				$match[1] = $this->name($match[1]);
+			}
+		}
+		return '(' . $prepend .$match[1] . ')';
+	}
+
+/**
+ * Returns an array of the indexes in given datasource name.
+ *
+ * @param string $model Name of model to inspect
+ * @return array Fields in table. Keys are column and unique
+ */
+	function index($model) {
+		$index = array();
+		$table = $this->fullTableName($model, false);
+		if ($table) {
+			$indexes = $this->query("SELECT c2.relname, i.indisprimary, i.indisunique, i.indisclustered, i.indisvalid, pg_catalog.pg_get_indexdef(i.indexrelid, 0, true) as statement, c2.reltablespace
+			FROM pg_catalog.pg_class c, pg_catalog.pg_class c2, pg_catalog.pg_index i
+			WHERE c.oid  = (
+				SELECT c.oid
+				FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
+				WHERE c.relname ~ '^(" . $table . ")$'
+					AND pg_catalog.pg_table_is_visible(c.oid)
+					AND n.nspname ~ '^(" . $this->config['schema'] . ")$'
+			)
+			AND c.oid = i.indrelid AND i.indexrelid = c2.oid
+			ORDER BY i.indisprimary DESC, i.indisunique DESC, c2.relname", false);
+			foreach ($indexes as $i => $info) {
+				$key = array_pop($info);
+				if ($key['indisprimary']) {
+					$key['relname'] = 'PRIMARY';
+				}
+				$col = array();
+				preg_match('/\(([^\)]+)\)/', $key['statement'], $indexColumns);
+				$parsedColumn = $indexColumns[1];
+				if (strpos($indexColumns[1], ',') !== false) {
+					$parsedColumn = explode(', ', $indexColumns[1]);
+				}
+				$index[$key['relname']]['unique'] = $key['indisunique'];
+				$index[$key['relname']]['column'] = $parsedColumn;
+			}
+		}
+		return $index;
+	}
+
+/**
+ * Alter the Schema of a table.
+ *
+ * @param array $compare Results of CakeSchema::compare()
+ * @param string $table name of the table
+ * @access public
+ * @return array
+ */
+	function alterSchema($compare, $table = null) {
+		if (!is_array($compare)) {
+			return false;
+		}
+		$out = '';
+		$colList = array();
+		foreach ($compare as $curTable => $types) {
+			$indexes = $colList = array();
+			if (!$table || $table == $curTable) {
+				$out .= 'ALTER TABLE ' . $this->fullTableName($curTable) . " \n";
+				foreach ($types as $type => $column) {
+					if (isset($column['indexes'])) {
+						$indexes[$type] = $column['indexes'];
+						unset($column['indexes']);
+					}
+					switch ($type) {
+						case 'add':
+							foreach ($column as $field => $col) {
+								$col['name'] = $field;
+								$alter = 'ADD COLUMN '.$this->buildColumn($col);
+								if (isset($col['after'])) {
+									$alter .= ' AFTER '. $this->name($col['after']);
+								}
+								$colList[] = $alter;
+							}
+						break;
+						case 'drop':
+							foreach ($column as $field => $col) {
+								$col['name'] = $field;
+								$colList[] = 'DROP COLUMN '.$this->name($field);
+							}
+						break;
+						case 'change':
+							foreach ($column as $field => $col) {
+								if (!isset($col['name'])) {
+									$col['name'] = $field;
+								}
+								$fieldName = $this->name($field);
+
+								$default = isset($col['default']) ? $col['default'] : null;
+								$nullable = isset($col['null']) ? $col['null'] : null;
+								unset($col['default'], $col['null']);
+								$colList[] = 'ALTER COLUMN '. $fieldName .' TYPE ' . str_replace($fieldName, '', $this->buildColumn($col));
+
+								if (isset($nullable)) {
+									$nullable = ($nullable) ? 'DROP NOT NULL' : 'SET NOT NULL';
+									$colList[] = 'ALTER COLUMN '. $fieldName .'  ' . $nullable;
+								}
+
+								if (isset($default)) {
+									$colList[] = 'ALTER COLUMN '. $fieldName .'  SET DEFAULT ' . $this->value($default, $col['type']);
+								} else {
+									$colList[] = 'ALTER COLUMN '. $fieldName .'  DROP DEFAULT';
+								}
+
+							}
+						break;
+					}
+				}
+				if (isset($indexes['drop']['PRIMARY'])) {
+					$colList[] = 'DROP CONSTRAINT ' . $curTable . '_pkey';
+				}
+				if (isset($indexes['add']['PRIMARY'])) {
+					$cols = $indexes['add']['PRIMARY']['column'];
+					if (is_array($cols)) {
+						$cols = implode(', ', $cols);
+					}
+					$colList[] = 'ADD PRIMARY KEY (' . $cols . ')';
+				}
+
+				if (!empty($colList)) {
+					$out .= "\t" . implode(",\n\t", $colList) . ";\n\n";
+				} else {
+					$out = '';
+				}
+				$out .= implode(";\n\t", $this->_alterIndexes($curTable, $indexes));
+			}
+		}
+		return $out;
+	}
+
+/**
+ * Generate PostgreSQL index alteration statements for a table.
+ *
+ * @param string $table Table to alter indexes for
+ * @param array $new Indexes to add and drop
+ * @return array Index alteration statements
+ */
+	function _alterIndexes($table, $indexes) {
+		$alter = array();
+		if (isset($indexes['drop'])) {
+			foreach($indexes['drop'] as $name => $value) {
+				$out = 'DROP ';
+				if ($name == 'PRIMARY') {
+					continue;
+				} else {
+					$out .= 'INDEX ' . $name;
+				}
+				$alter[] = $out;
+			}
+		}
+		if (isset($indexes['add'])) {
+			foreach ($indexes['add'] as $name => $value) {
+				$out = 'CREATE ';
+				if ($name == 'PRIMARY') {
+					continue;
+				} else {
+					if (!empty($value['unique'])) {
+						$out .= 'UNIQUE ';
+					}
+					$out .= 'INDEX ';
+				}
+				if (is_array($value['column'])) {
+					$out .= $name . ' ON ' . $table . ' (' . implode(', ', array_map(array(&$this, 'name'), $value['column'])) . ')';
+				} else {
+					$out .= $name . ' ON ' . $table . ' (' . $this->name($value['column']) . ')';
+				}
+				$alter[] = $out;
+			}
+		}
+		return $alter;
+	}
+
+/**
+ * Returns a limit statement in the correct format for the particular database.
+ *
+ * @param integer $limit Limit of results returned
+ * @param integer $offset Offset from which to start results
+ * @return string SQL limit/offset statement
+ */
+	function limit($limit, $offset = null) {
+		if ($limit) {
+			$rt = '';
+			if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
+				$rt = ' LIMIT';
+			}
+
+			$rt .= ' ' . $limit;
+			if ($offset) {
+				$rt .= ' OFFSET ' . $offset;
+			}
+
+			return $rt;
+		}
+		return null;
+	}
+
+/**
+ * Converts database-layer column types to basic types
+ *
+ * @param string $real Real database-layer column type (i.e. "varchar(255)")
+ * @return string Abstract column type (i.e. "string")
+ */
+	function column($real) {
+		if (is_array($real)) {
+			$col = $real['name'];
+			if (isset($real['limit'])) {
+				$col .= '(' . $real['limit'] . ')';
+			}
+			return $col;
+		}
+
+		$col = str_replace(')', '', $real);
+		$limit = null;
+
+		if (strpos($col, '(') !== false) {
+			list($col, $limit) = explode('(', $col);
+		}
+
+		$floats = array(
+			'float', 'float4', 'float8', 'double', 'double precision', 'decimal', 'real', 'numeric'
+		);
+
+		switch (true) {
+			case (in_array($col, array('date', 'time', 'inet', 'boolean'))):
+				return $col;
+			case (strpos($col, 'timestamp') !== false):
+				return 'datetime';
+			case (strpos($col, 'time') === 0):
+				return 'time';
+			case (strpos($col, 'int') !== false && $col != 'interval'):
+				return 'integer';
+			case (strpos($col, 'char') !== false || $col == 'uuid'):
+				return 'string';
+			case (strpos($col, 'text') !== false):
+				return 'text';
+			case (strpos($col, 'bytea') !== false):
+				return 'binary';
+			case (in_array($col, $floats)):
+				return 'float';
+			default:
+				return 'text';
+			break;
+		}
+	}
+
+/**
+ * Gets the length of a database-native column description, or null if no length
+ *
+ * @param string $real Real database-layer column type (i.e. "varchar(255)")
+ * @return int An integer representing the length of the column
+ */
+	function length($real) {
+		$col = str_replace(array(')', 'unsigned'), '', $real);
+		$limit = null;
+
+		if (strpos($col, '(') !== false) {
+			list($col, $limit) = explode('(', $col);
+		}
+		if ($col == 'uuid') {
+			return 36;
+		}
+		if ($limit != null) {
+			return intval($limit);
+		}
+		return null;
+	}
+
+/**
+ * Enter description here...
+ *
+ * @param unknown_type $results
+ */
+	function resultSet(&$results) {
+		$this->results =& $results;
+		$this->map = array();
+		$num_fields = pg_num_fields($results);
+		$index = 0;
+		$j = 0;
+
+		while ($j < $num_fields) {
+			$columnName = pg_field_name($results, $j);
+
+			if (strpos($columnName, '__')) {
+				$parts = explode('__', $columnName);
+				$this->map[$index++] = array($parts[0], $parts[1]);
+			} else {
+				$this->map[$index++] = array(0, $columnName);
+			}
+			$j++;
+		}
+	}
+
+/**
+ * Fetches the next row from the current result set
+ *
+ * @return unknown
+ */
+	function fetchResult() {
+		if ($row = pg_fetch_row($this->results)) {
+			$resultRow = array();
+
+			foreach ($row as $index => $field) {
+				list($table, $column) = $this->map[$index];
+				$type = pg_field_type($this->results, $index);
+
+				switch ($type) {
+					case 'bool':
+						$resultRow[$table][$column] = $this->boolean($row[$index], false);
+					break;
+					case 'binary':
+					case 'bytea':
+						$resultRow[$table][$column] = pg_unescape_bytea($row[$index]);
+					break;
+					default:
+						$resultRow[$table][$column] = $row[$index];
+					break;
+				}
+			}
+			return $resultRow;
+		} else {
+			return false;
+		}
+	}
+
+/**
+ * Translates between PHP boolean values and PostgreSQL boolean values
+ *
+ * @param mixed $data Value to be translated
+ * @param boolean $quote	True to quote value, false otherwise
+ * @return mixed Converted boolean value
+ */
+	function boolean($data, $quote = true) {
+		switch (true) {
+			case ($data === true || $data === false):
+				return $data;
+			case ($data === 't' || $data === 'f'):
+				return ($data === 't');
+			case ($data === 'true' || $data === 'false'):
+				return ($data === 'true');
+			case ($data === 'TRUE' || $data === 'FALSE'):
+				return ($data === 'TRUE');
+			default:
+				return (bool)$data;
+			break;
+		}
+	}
+
+/**
+ * Sets the database encoding
+ *
+ * @param mixed $enc Database encoding
+ * @return boolean True on success, false on failure
+ */
+	function setEncoding($enc) {
+		return pg_set_client_encoding($this->connection, $enc) == 0;
+	}
+
+/**
+ * Gets the database encoding
+ *
+ * @return string The database encoding
+ */
+	function getEncoding() {
+		return pg_client_encoding($this->connection);
+	}
+
+/**
+ * Generate a Postgres-native column schema string
+ *
+ * @param array $column An array structured like the following:
+ *                      array('name'=>'value', 'type'=>'value'[, options]),
+ *                      where options can be 'default', 'length', or 'key'.
+ * @return string
+ */
+	function buildColumn($column) {
+		$col = $this->columns[$column['type']];
+		if (!isset($col['length']) && !isset($col['limit'])) {
+			unset($column['length']);
+		}
+		$out = preg_replace('/integer\([0-9]+\)/', 'integer', parent::buildColumn($column));
+		$out = str_replace('integer serial', 'serial', $out);
+		if (strpos($out, 'timestamp DEFAULT')) {
+			if (isset($column['null']) && $column['null']) {
+				$out = str_replace('DEFAULT NULL', '', $out);
+			} else {
+				$out = str_replace('DEFAULT NOT NULL', '', $out);
+			}
+		}
+		if (strpos($out, 'DEFAULT DEFAULT')) {
+			if (isset($column['null']) && $column['null']) {
+				$out = str_replace('DEFAULT DEFAULT', 'DEFAULT NULL', $out);
+			} elseif (in_array($column['type'], array('integer', 'float'))) {
+				$out = str_replace('DEFAULT DEFAULT', 'DEFAULT 0', $out);
+			} elseif ($column['type'] == 'boolean') {
+				$out = str_replace('DEFAULT DEFAULT', 'DEFAULT FALSE', $out);
+			}
+		}
+		return $out;
+	}
+
+/**
+ * Format indexes for create table
+ *
+ * @param array $indexes
+ * @param string $table
+ * @return string
+ */
+	function buildIndex($indexes, $table = null) {
+		$join = array();
+		if (!is_array($indexes)) {
+			return array();
+		}
+		foreach ($indexes as $name => $value) {
+			if ($name == 'PRIMARY') {
+				$out = 'PRIMARY KEY  (' . $this->name($value['column']) . ')';
+			} else {
+				$out = 'CREATE ';
+				if (!empty($value['unique'])) {
+					$out .= 'UNIQUE ';
+				}
+				if (is_array($value['column'])) {
+					$value['column'] = implode(', ', array_map(array(&$this, 'name'), $value['column']));
+				} else {
+					$value['column'] = $this->name($value['column']);
+				}
+				$out .= "INDEX {$name} ON {$table}({$value['column']});";
+			}
+			$join[] = $out;
+		}
+		return $join;
+	}
+
+/**
+ * Overrides DboSource::renderStatement to handle schema generation with Postgres-style indexes
+ *
+ * @param string $type
+ * @param array $data
+ * @return string
+ */
+	function renderStatement($type, $data) {
+		switch (strtolower($type)) {
+			case 'schema':
+				extract($data);
+
+				foreach ($indexes as $i => $index) {
+					if (preg_match('/PRIMARY KEY/', $index)) {
+						unset($indexes[$i]);
+						$columns[] = $index;
+						break;
+					}
+				}
+				$join = array('columns' => ",\n\t", 'indexes' => "\n");
+
+				foreach (array('columns', 'indexes') as $var) {
+					if (is_array(${$var})) {
+						${$var} = implode($join[$var], array_filter(${$var}));
+					}
+				}
+				return "CREATE TABLE {$table} (\n\t{$columns}\n);\n{$indexes}";
+			break;
+			default:
+				return parent::renderStatement($type, $data);
+			break;
+		}
+	}
+}