corpus_parole: comparison cms/drupal/includes/database/pgsql/database.inc

equal deleted inserted replaced

-:07239de796bb
+:e756a8c72c3d
+<?php
+/**
+* @file
+* Database interface code for PostgreSQL database servers.
+*/
+/**
+* @addtogroup database
+* @{
+*/
+/**
+* The name by which to obtain a lock for retrieving the next insert id.
+*/
+define('POSTGRESQL_NEXTID_LOCK', 1000);
+class DatabaseConnection_pgsql extends DatabaseConnection {
+public function __construct(array $connection_options = array()) {
+// This driver defaults to transaction support, except if explicitly passed FALSE.
+$this->transactionSupport = !isset($connection_options['transactions']) || ($connection_options['transactions'] !== FALSE);
+// Transactional DDL is always available in PostgreSQL,
+// but we'll only enable it if standard transactions are.
+$this->transactionalDDLSupport = $this->transactionSupport;
+// Default to TCP connection on port 5432.
+if (empty($connection_options['port'])) {
+$connection_options['port'] = 5432;
+}
+// PostgreSQL in trust mode doesn't require a password to be supplied.
+if (empty($connection_options['password'])) {
+$connection_options['password'] = NULL;
+}
+// If the password contains a backslash it is treated as an escape character
+// http://bugs.php.net/bug.php?id=53217
+// so backslashes in the password need to be doubled up.
+// The bug was reported against pdo_pgsql 1.0.2, backslashes in passwords
+// will break on this doubling up when the bug is fixed, so check the version
+//elseif (phpversion('pdo_pgsql') < 'version_this_was_fixed_in') {
+else {
+$connection_options['password'] = str_replace('\\', '\\\\', $connection_options['password']);
+}
+$this->connectionOptions = $connection_options;
+$dsn = 'pgsql:host=' . $connection_options['host'] . ' dbname=' . $connection_options['database'] . ' port=' . $connection_options['port'];
+// Allow PDO options to be overridden.
+$connection_options += array(
+'pdo' => array(),
+);
+$connection_options['pdo'] += array(
+// Prepared statements are most effective for performance when queries
+// are recycled (used several times). However, if they are not re-used,
+// prepared statements become inefficient. Since most of Drupal's
+// prepared queries are not re-used, it should be faster to emulate
+// the preparation than to actually ready statements for re-use. If in
+// doubt, reset to FALSE and measure performance.
+PDO::ATTR_EMULATE_PREPARES => TRUE,
+// Convert numeric values to strings when fetching.
+PDO::ATTR_STRINGIFY_FETCHES => TRUE,
+);
+parent::__construct($dsn, $connection_options['username'], $connection_options['password'], $connection_options['pdo']);
+// Force PostgreSQL to use the UTF-8 character set by default.
+$this->exec("SET NAMES 'UTF8'");
+// Execute PostgreSQL init_commands.
+if (isset($connection_options['init_commands'])) {
+$this->exec(implode('; ', $connection_options['init_commands']));
+}
+}
+public function prepareQuery($query) {
+// mapConditionOperator converts LIKE operations to ILIKE for consistency
+// with MySQL. However, Postgres does not support ILIKE on bytea (blobs)
+// fields.
+// To make the ILIKE operator work, we type-cast bytea fields into text.
+// @todo This workaround only affects bytea fields, but the involved field
+//   types involved in the query are unknown, so there is no way to
+//   conditionally execute this for affected queries only.
+return parent::prepareQuery(preg_replace('/ ([^ ]+) +(I*LIKE|NOT +I*LIKE) /i', ' ${1}::text ${2} ', $query));
+}
+public function query($query, array $args = array(), $options = array()) {
+$options += $this->defaultOptions();
+// The PDO PostgreSQL driver has a bug which
+// doesn't type cast booleans correctly when
+// parameters are bound using associative
+// arrays.
+// See http://bugs.php.net/bug.php?id=48383
+foreach ($args as &$value) {
+if (is_bool($value)) {
+$value = (int) $value;
+}
+}
+try {
+if ($query instanceof DatabaseStatementInterface) {
+$stmt = $query;
+$stmt->execute(NULL, $options);
+}
+else {
+$this->expandArguments($query, $args);
+$stmt = $this->prepareQuery($query);
+$stmt->execute($args, $options);
+}
+switch ($options['return']) {
+case Database::RETURN_STATEMENT:
+return $stmt;
+case Database::RETURN_AFFECTED:
+return $stmt->rowCount();
+case Database::RETURN_INSERT_ID:
+return $this->lastInsertId($options['sequence_name']);
+case Database::RETURN_NULL:
+return;
+default:
+throw new PDOException('Invalid return directive: ' . $options['return']);
+}
+}
+catch (PDOException $e) {
+if ($options['throw_exception']) {
+// Add additional debug information.
+if ($query instanceof DatabaseStatementInterface) {
+$e->query_string = $stmt->getQueryString();
+}
+else {
+$e->query_string = $query;
+}
+$e->args = $args;
+throw $e;
+}
+return NULL;
+}
+}
+public function queryRange($query, $from, $count, array $args = array(), array $options = array()) {
+return $this->query($query . ' LIMIT ' . (int) $count . ' OFFSET ' . (int) $from, $args, $options);
+}
+public function queryTemporary($query, array $args = array(), array $options = array()) {
+$tablename = $this->generateTemporaryTableName();
+$this->query('CREATE TEMPORARY TABLE {' . $tablename . '} AS ' . $query, $args, $options);
+return $tablename;
+}
+public function driver() {
+return 'pgsql';
+}
+public function databaseType() {
+return 'pgsql';
+}
+public function mapConditionOperator($operator) {
+static $specials;
+// Function calls not allowed in static declarations, thus this method.
+if (!isset($specials)) {
+$specials = array(
+// In PostgreSQL, 'LIKE' is case-sensitive. For case-insensitive LIKE
+// statements, we need to use ILIKE instead.
+'LIKE' => array('operator' => 'ILIKE'),
+'NOT LIKE' => array('operator' => 'NOT ILIKE'),
+);
+}
+return isset($specials[$operator]) ? $specials[$operator] : NULL;
+}
+/**
+* Retrieve the next id in a sequence.
+*
+* PostgreSQL has built in sequences. We'll use these instead of inserting
+* and updating a sequences table.
+*/
+public function nextId($existing = 0) {
+// Retrieve the name of the sequence. This information cannot be cached
+// because the prefix may change, for example, like it does in simpletests.
+$sequence_name = $this->makeSequenceName('sequences', 'value');
+// When PostgreSQL gets a value too small then it will lock the table,
+// retry the INSERT and if it's still too small then alter the sequence.
+$id = $this->query("SELECT nextval('" . $sequence_name . "')")->fetchField();
+if ($id > $existing) {
+return $id;
+}
+// PostgreSQL advisory locks are simply locks to be used by an
+// application such as Drupal. This will prevent other Drupal processes
+// from altering the sequence while we are.
+$this->query("SELECT pg_advisory_lock(" . POSTGRESQL_NEXTID_LOCK . ")");
+// While waiting to obtain the lock, the sequence may have been altered
+// so lets try again to obtain an adequate value.
+$id = $this->query("SELECT nextval('" . $sequence_name . "')")->fetchField();
+if ($id > $existing) {
+$this->query("SELECT pg_advisory_unlock(" . POSTGRESQL_NEXTID_LOCK . ")");
+return $id;
+}
+// Reset the sequence to a higher value than the existing id.
+$this->query("ALTER SEQUENCE " . $sequence_name . " RESTART WITH " . ($existing + 1));
+// Retrieve the next id. We know this will be as high as we want it.
+$id = $this->query("SELECT nextval('" . $sequence_name . "')")->fetchField();
+$this->query("SELECT pg_advisory_unlock(" . POSTGRESQL_NEXTID_LOCK . ")");
+return $id;
+}
+public function utf8mb4IsActive() {
+return TRUE;
+}
+public function utf8mb4IsSupported() {
+return TRUE;
+}
+}
+/**
+* @} End of "addtogroup database".
+*/