Rename 'kohana' to 'system' to conform to the Kohana filesystem layout. I'm comfortable with us not clearly drawing the distinction about the fact that it's Kohana.

1 files changed, 538 insertions, 0 deletions

diff --git a/system/libraries/drivers/Database/Pgsql.php b/system/libraries/drivers/Database/Pgsql.php
new file mode 100644
index 00000000..c53c8439
--- /dev/null
+++ b/system/libraries/drivers/Database/Pgsql.php
@@ -0,0 +1,538 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+ * PostgreSQL 8.1+ Database Driver
+ *
+ * $Id: Pgsql.php 4344 2009-05-11 16:41:39Z zombor $
+ *
+ * @package    Core
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2008 Kohana Team
+ * @license    http://kohanaphp.com/license.html
+ */
+class Database_Pgsql_Driver extends Database_Driver {
+
+	// Database connection link
+	protected $link;
+	protected $db_config;
+
+	/**
+	 * Sets the config for the class.
+	 *
+	 * @param  array  database configuration
+	 */
+	public function __construct($config)
+	{
+		$this->db_config = $config;
+
+		Kohana::log('debug', 'PgSQL Database Driver Initialized');
+	}
+
+	public function connect()
+	{
+		// Check if link already exists
+		if (is_resource($this->link))
+			return $this->link;
+
+		// Import the connect variables
+		extract($this->db_config['connection']);
+
+		// Persistent connections enabled?
+		$connect = ($this->db_config['persistent'] == TRUE) ? 'pg_pconnect' : 'pg_connect';
+
+		// Build the connection info
+		$port = isset($port) ? 'port=\''.$port.'\'' : '';
+		$host = isset($host) ? 'host=\''.$host.'\' '.$port : ''; // if no host, connect with the socket
+
+		$connection_string = $host.' dbname=\''.$database.'\' user=\''.$user.'\' password=\''.$pass.'\'';
+		// Make the connection and select the database
+		if ($this->link = $connect($connection_string))
+		{
+			if ($charset = $this->db_config['character_set'])
+			{
+				echo $this->set_charset($charset);
+			}
+
+			// Clear password after successful connect
+			$this->db_config['connection']['pass'] = NULL;
+
+			return $this->link;
+		}
+
+		return FALSE;
+	}
+
+	public function query($sql)
+	{
+		// Only cache if it's turned on, and only cache if it's not a write statement
+		if ($this->db_config['cache'] AND ! preg_match('#\b(?:INSERT|UPDATE|SET)\b#i', $sql))
+		{
+			$hash = $this->query_hash($sql);
+
+			if ( ! isset($this->query_cache[$hash]))
+			{
+				// Set the cached object
+				$this->query_cache[$hash] = new Pgsql_Result(pg_query($this->link, $sql), $this->link, $this->db_config['object'], $sql);
+			}
+			else
+			{
+				// Rewind cached result
+				$this->query_cache[$hash]->rewind();
+			}
+
+			return $this->query_cache[$hash];
+		}
+
+		// Suppress warning triggered when a database error occurs (e.g., a constraint violation)
+		return new Pgsql_Result(@pg_query($this->link, $sql), $this->link, $this->db_config['object'], $sql);
+	}
+
+	public function set_charset($charset)
+	{
+		$this->query('SET client_encoding TO '.pg_escape_string($this->link, $charset));
+	}
+
+	public function escape_table($table)
+	{
+		if (!$this->db_config['escape'])
+			return $table;
+
+		return '"'.str_replace('.', '"."', $table).'"';
+	}
+
+	public function escape_column($column)
+	{
+		if (!$this->db_config['escape'])
+			return $column;
+
+		if ($column == '*')
+			return $column;
+
+		// This matches any functions we support to SELECT.
+		if ( preg_match('/(avg|count|sum|max|min)\(\s*(.*)\s*\)(\s*as\s*(.+)?)?/i', $column, $matches))
+		{
+			if ( count($matches) == 3)
+			{
+				return $matches[1].'('.$this->escape_column($matches[2]).')';
+			}
+			else if ( count($matches) == 5)
+			{
+				return $matches[1].'('.$this->escape_column($matches[2]).') AS '.$this->escape_column($matches[2]);
+			}
+		}
+
+		// This matches any modifiers we support to SELECT.
+		if ( ! preg_match('/\b(?:all|distinct)\s/i', $column))
+		{
+			if (stripos($column, ' AS ') !== FALSE)
+			{
+				// Force 'AS' to uppercase
+				$column = str_ireplace(' AS ', ' AS ', $column);
+
+				// Runs escape_column on both sides of an AS statement
+				$column = array_map(array($this, __FUNCTION__), explode(' AS ', $column));
+
+				// Re-create the AS statement
+				return implode(' AS ', $column);
+			}
+
+			return preg_replace('/[^.*]+/', '"$0"', $column);
+		}
+
+		$parts = explode(' ', $column);
+		$column = '';
+
+		for ($i = 0, $c = count($parts); $i < $c; $i++)
+		{
+			// The column is always last
+			if ($i == ($c - 1))
+			{
+				$column .= preg_replace('/[^.*]+/', '"$0"', $parts[$i]);
+			}
+			else // otherwise, it's a modifier
+			{
+				$column .= $parts[$i].' ';
+			}
+		}
+		return $column;
+	}
+
+	public function regex($field, $match, $type, $num_regexs)
+	{
+		$prefix = ($num_regexs == 0) ? '' : $type;
+
+		return $prefix.' '.$this->escape_column($field).' ~* \''.$this->escape_str($match).'\'';
+	}
+
+	public function notregex($field, $match, $type, $num_regexs)
+	{
+		$prefix = $num_regexs == 0 ? '' : $type;
+
+		return $prefix.' '.$this->escape_column($field).' !~* \''.$this->escape_str($match) . '\'';
+	}
+
+	public function limit($limit, $offset = 0)
+	{
+		return 'LIMIT '.$limit.' OFFSET '.$offset;
+	}
+
+	public function compile_select($database)
+	{
+		$sql = ($database['distinct'] == TRUE) ? 'SELECT DISTINCT ' : 'SELECT ';
+		$sql .= (count($database['select']) > 0) ? implode(', ', $database['select']) : '*';
+
+		if (count($database['from']) > 0)
+		{
+			$sql .= "\nFROM ";
+			$sql .= implode(', ', $database['from']);
+		}
+
+		if (count($database['join']) > 0)
+		{
+			foreach($database['join'] AS $join)
+			{
+				$sql .= "\n".$join['type'].'JOIN '.implode(', ', $join['tables']).' ON '.$join['conditions'];
+			}
+		}
+
+		if (count($database['where']) > 0)
+		{
+			$sql .= "\nWHERE ";
+		}
+
+		$sql .= implode("\n", $database['where']);
+
+		if (count($database['groupby']) > 0)
+		{
+			$sql .= "\nGROUP BY ";
+			$sql .= implode(', ', $database['groupby']);
+		}
+
+		if (count($database['having']) > 0)
+		{
+			$sql .= "\nHAVING ";
+			$sql .= implode("\n", $database['having']);
+		}
+
+		if (count($database['orderby']) > 0)
+		{
+			$sql .= "\nORDER BY ";
+			$sql .= implode(', ', $database['orderby']);
+		}
+
+		if (is_numeric($database['limit']))
+		{
+			$sql .= "\n";
+			$sql .= $this->limit($database['limit'], $database['offset']);
+		}
+
+		return $sql;
+	}
+
+	public function escape_str($str)
+	{
+		if (!$this->db_config['escape'])
+			return $str;
+
+		is_resource($this->link) or $this->connect();
+
+		return pg_escape_string($this->link, $str);
+	}
+
+	public function list_tables()
+	{
+		$sql    = 'SELECT table_schema || \'.\' || table_name FROM information_schema.tables WHERE table_schema NOT IN (\'pg_catalog\', \'information_schema\')';
+		$result = $this->query($sql)->result(FALSE, PGSQL_ASSOC);
+
+		$retval = array();
+		foreach ($result as $row)
+		{
+			$retval[] = current($row);
+		}
+
+		return $retval;
+	}
+
+	public function show_error()
+	{
+		return pg_last_error($this->link);
+	}
+
+	public function list_fields($table)
+	{
+		$result = NULL;
+
+		foreach ($this->field_data($table) as $row)
+		{
+			// Make an associative array
+			$result[$row->column_name] = $this->sql_type($row->data_type);
+
+			if (!strncmp($row->column_default, 'nextval(', 8))
+			{
+				$result[$row->column_name]['sequenced'] = TRUE;
+			}
+
+			if ($row->is_nullable === 'YES')
+			{
+				$result[$row->column_name]['null'] = TRUE;
+			}
+		}
+
+		if (!isset($result))
+			throw new Kohana_Database_Exception('database.table_not_found', $table);
+
+		return $result;
+	}
+
+	public function field_data($table)
+	{
+		// http://www.postgresql.org/docs/8.3/static/infoschema-columns.html
+		$result = $this->query('
+			SELECT column_name, column_default, is_nullable, data_type, udt_name,
+				character_maximum_length, numeric_precision, numeric_precision_radix, numeric_scale
+			FROM information_schema.columns
+			WHERE table_name = \''. $this->escape_str($table) .'\'
+			ORDER BY ordinal_position
+		');
+
+		return $result->result_array(TRUE);
+	}
+
+} // End Database_Pgsql_Driver Class
+
+/**
+ * PostgreSQL Result
+ */
+class Pgsql_Result extends Database_Result {
+
+	// Data fetching types
+	protected $fetch_type  = 'pgsql_fetch_object';
+	protected $return_type = PGSQL_ASSOC;
+
+	/**
+	 * Sets up the result variables.
+	 *
+	 * @param  resource  query result
+	 * @param  resource  database link
+	 * @param  boolean   return objects or arrays
+	 * @param  string    SQL query that was run
+	 */
+	public function __construct($result, $link, $object = TRUE, $sql)
+	{
+		$this->link = $link;
+		$this->result = $result;
+
+		// If the query is a resource, it was a SELECT, SHOW, DESCRIBE, EXPLAIN query
+		if (is_resource($result))
+		{
+			// Its an DELETE, INSERT, REPLACE, or UPDATE query
+			if (preg_match('/^(?:delete|insert|replace|update)\b/iD', trim($sql), $matches))
+			{
+				$this->insert_id  = (strtolower($matches[0]) == 'insert') ? $this->insert_id() : FALSE;
+				$this->total_rows = pg_affected_rows($this->result);
+			}
+			else
+			{
+				$this->current_row = 0;
+				$this->total_rows  = pg_num_rows($this->result);
+				$this->fetch_type = ($object === TRUE) ? 'pg_fetch_object' : 'pg_fetch_array';
+			}
+		}
+		else
+		{
+			throw new Kohana_Database_Exception('database.error', pg_last_error().' - '.$sql);
+		}
+
+		// Set result type
+		$this->result($object);
+
+		// Store the SQL
+		$this->sql = $sql;
+	}
+
+	/**
+	 * Magic __destruct function, frees the result.
+	 */
+	public function __destruct()
+	{
+		if (is_resource($this->result))
+		{
+			pg_free_result($this->result);
+		}
+	}
+
+	public function result($object = TRUE, $type = PGSQL_ASSOC)
+	{
+		$this->fetch_type = ((bool) $object) ? 'pg_fetch_object' : 'pg_fetch_array';
+
+		// This check has to be outside the previous statement, because we do not
+		// know the state of fetch_type when $object = NULL
+		// NOTE - The class set by $type must be defined before fetching the result,
+		// autoloading is disabled to save a lot of stupid overhead.
+		if ($this->fetch_type == 'pg_fetch_object')
+		{
+			$this->return_type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
+		}
+		else
+		{
+			$this->return_type = $type;
+		}
+
+		return $this;
+	}
+
+	public function as_array($object = NULL, $type = PGSQL_ASSOC)
+	{
+		return $this->result_array($object, $type);
+	}
+
+	public function result_array($object = NULL, $type = PGSQL_ASSOC)
+	{
+		$rows = array();
+
+		if (is_string($object))
+		{
+			$fetch = $object;
+		}
+		elseif (is_bool($object))
+		{
+			if ($object === TRUE)
+			{
+				$fetch = 'pg_fetch_object';
+
+				// NOTE - The class set by $type must be defined before fetching the result,
+				// autoloading is disabled to save a lot of stupid overhead.
+				$type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
+			}
+			else
+			{
+				$fetch = 'pg_fetch_array';
+			}
+		}
+		else
+		{
+			// Use the default config values
+			$fetch = $this->fetch_type;
+
+			if ($fetch == 'pg_fetch_object')
+			{
+				$type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
+			}
+		}
+
+		if ($this->total_rows)
+		{
+			pg_result_seek($this->result, 0);
+
+			while ($row = $fetch($this->result, NULL, $type))
+			{
+				$rows[] = $row;
+			}
+		}
+
+		return $rows;
+	}
+
+	public function insert_id()
+	{
+		if ($this->insert_id === NULL)
+		{
+			$query = 'SELECT LASTVAL() AS insert_id';
+
+			// Disable error reporting for this, just to silence errors on
+			// tables that have no serial column.
+			$ER = error_reporting(0);
+
+			$result = pg_query($this->link, $query);
+			$insert_id = pg_fetch_array($result, NULL, PGSQL_ASSOC);
+
+			$this->insert_id = $insert_id['insert_id'];
+
+			// Reset error reporting
+			error_reporting($ER);
+		}
+
+		return $this->insert_id;
+	}
+
+	public function seek($offset)
+	{
+		if ($this->offsetExists($offset) AND pg_result_seek($this->result, $offset))
+		{
+			// Set the current row to the offset
+			$this->current_row = $offset;
+
+			return TRUE;
+		}
+
+		return FALSE;
+	}
+
+	public function list_fields()
+	{
+		$field_names = array();
+
+		$fields = pg_num_fields($this->result);
+		for ($i = 0; $i < $fields; ++$i)
+		{
+			$field_names[] = pg_field_name($this->result, $i);
+		}
+
+		return $field_names;
+	}
+
+	/**
+	 * ArrayAccess: offsetGet
+	 */
+	public function offsetGet($offset)
+	{
+		if ( ! $this->seek($offset))
+			return FALSE;
+
+		// Return the row by calling the defined fetching callback
+		$fetch = $this->fetch_type;
+		return $fetch($this->result, NULL, $this->return_type);
+	}
+
+} // End Pgsql_Result Class
+
+/**
+ * PostgreSQL Prepared Statement (experimental)
+ */
+class Kohana_Pgsql_Statement {
+
+	protected $link = NULL;
+	protected $stmt;
+
+	public function __construct($sql, $link)
+	{
+		$this->link = $link;
+
+		$this->stmt = $this->link->prepare($sql);
+
+		return $this;
+	}
+
+	public function __destruct()
+	{
+		$this->stmt->close();
+	}
+
+	// Sets the bind parameters
+	public function bind_params()
+	{
+		$argv = func_get_args();
+		return $this;
+	}
+
+	// sets the statement values to the bound parameters
+	public function set_vals()
+	{
+		return $this;
+	}
+
+	// Runs the statement
+	public function execute()
+	{
+		return $this;
+	}
+}