--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/includes/install.pgsql.inc	Tue Dec 23 14:28:28 2008 +0100
@@ -0,0 +1,140 @@
+<?php
+// $Id: install.pgsql.inc,v 1.6 2007/10/22 15:22:39 dries Exp $
+
+// PostgreSQL specific install functions
+
+/**
+ * Check if PostgreSQL is available.
+ *
+ * @return
+ *  TRUE/FALSE
+ */
+function pgsql_is_available() {
+  return function_exists('pg_connect');
+}
+
+/**
+ * Check if we can connect to PostgreSQL.
+ *
+ * @return
+ *  TRUE/FALSE
+ */
+function drupal_test_pgsql($url, &$success) {
+  if (!pgsql_is_available()) {
+    drupal_set_message(st('PHP PostgreSQL support not enabled.'), 'error');
+    return FALSE;
+  }
+
+  $url = parse_url($url);
+  $conn_string = '';
+
+  // Decode url-encoded information in the db connection string
+  if (isset($url['user'])) {
+    $conn_string .= ' user='. urldecode($url['user']);
+  }
+  if (isset($url['pass'])) {
+    $conn_string .= ' password='. urldecode($url['pass']);
+  }
+  if (isset($url['host'])) {
+    $conn_string .= ' host='. urldecode($url['host']);
+  }
+  if (isset($url['path'])) {
+    $conn_string .= ' dbname='. substr(urldecode($url['path']), 1);
+  }
+  if (isset($url['port'])) {
+    $conn_string .= ' port='. urldecode($url['port']);
+  }
+
+  // Test connecting to the database.
+  $connection = @pg_connect($conn_string);
+  if (!$connection) {
+    drupal_set_message(st('Failed to connect to your PostgreSQL database server. PostgreSQL reports the following message: %error.<ul><li>Are you sure you have the correct username and password?</li><li>Are you sure that you have typed the correct database hostname?</li><li>Are you sure that the database server is running?</li><li>Are you sure you typed the correct database name?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%error' => 'Connection failed. See log file for failure reason')), 'error');
+    return FALSE;
+  }
+
+  $success = array('CONNECT');
+
+  // Test CREATE.
+  $query = 'CREATE TABLE drupal_install_test (id integer NOT NULL)';
+  $result = pg_query($connection, $query);
+  if ($error = pg_result_error($result)) {
+    drupal_set_message(st('Failed to create a test table on your PostgreSQL database server with the command %query. PostgreSQL reports the following message: %error.<ul><li>Are you sure the configured username has the necessary PostgreSQL permissions to create tables in the database?</li></ul>For more help, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.', array('%query' => $query, '%error' => $error)), 'error');
+    return FALSE;
+  }
+  $err = FALSE;
+  $success[] = 'SELECT';
+  $success[] = 'CREATE';
+
+  // Test INSERT.
+  $query = 'INSERT INTO drupal_install_test (id) VALUES (1)';
+  $result = pg_query($connection, $query);
+  if ($error = pg_result_error($result)) {
+    drupal_set_message(st('Failed to insert a value into a test table on your PostgreSQL database server. We tried inserting a value with the command %query and PostgreSQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'INSERT';
+  }
+
+  // Test UPDATE.
+  $query = 'UPDATE drupal_install_test SET id = 2';
+  $result = pg_query($connection, $query);
+  if ($error = pg_result_error($result)) {
+    drupal_set_message(st('Failed to update a value in a test table on your PostgreSQL database server. We tried updating a value with the command %query and PostgreSQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'UPDATE';
+  }
+
+  // Test LOCK.
+  $query = 'BEGIN; LOCK drupal_install_test IN SHARE ROW EXCLUSIVE MODE';
+  $result = pg_query($connection, $query);
+  if ($error = pg_result_error($result)) {
+    drupal_set_message(st('Failed to lock a test table on your PostgreSQL database server. We tried locking a table with the command %query and PostgreSQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'LOCK';
+  }
+
+  // Test UNLOCK, which is done automatically upon transaction end in PostgreSQL
+  $query = 'COMMIT';
+  $result = pg_query($connection, $query);
+  if ($error = pg_result_error()) {
+    drupal_set_message(st('Failed to unlock a test table on your PostgreSQL database server. We tried unlocking a table with the command %query and PostgreSQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'UNLOCK';
+  }
+
+  // Test DELETE.
+  $query = 'DELETE FROM drupal_install_test';
+  $result = pg_query($connection, $query);
+  if ($error = pg_result_error()) {
+    drupal_set_message(st('Failed to delete a value from a test table on your PostgreSQL database server. We tried deleting a value with the command %query and PostgreSQL reported the following error: %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'DELETE';
+  }
+
+  // Test DROP.
+  $query = 'DROP TABLE drupal_install_test';
+  $result = pg_query($connection, $query);
+  if ($error = pg_result_error()) {
+    drupal_set_message(st('Failed to drop a test table from your PostgreSQL database server. We tried dropping a table with the command %query and PostgreSQL reported the following error %error.', array('%query' => $query, '%error' => $error)), 'error');
+    $err = TRUE;
+  }
+  else {
+    $success[] = 'DROP';
+  }
+
+  if ($err) {
+    return FALSE;
+  }
+
+  pg_close($connection);
+  return TRUE;
+}
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