108 lines
3.4 KiB
PHP
108 lines
3.4 KiB
PHP
<?php
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// $Id$
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/**
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* @file
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* Install functions for PostgreSQL embedded database engine.
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*/
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// PostgreSQL specific install functions
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class DatabaseTasks_pgsql extends DatabaseTasks {
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protected $pdoDriver = 'pgsql';
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public function __construct() {
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$this->tasks[] = array(
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'function' => 'checkEncoding',
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'arguments' => array(),
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);
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$this->tasks[] = array(
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'function' => 'initializeDatabase',
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'arguments' => array(),
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);
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}
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public function name() {
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return 'PostgreSQL';
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}
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/**
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* Check encoding is UTF8.
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*/
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protected function checkEncoding() {
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try {
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if (db_query('SHOW server_encoding')->fetchField() == 'UTF8') {
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$this->pass(st('Database is encoded in UTF-8'));
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}
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else {
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$replacements = array(
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'%encoding' => 'UTF8',
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'%driver' => $this->name(),
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'!link' => '<a href="INSTALL.pgsql.txt">INSTALL.pgsql.txt</a>'
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);
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$text = 'The %driver database must use %encoding encoding to work with Drupal.';
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$text .= 'Please recreate the database with %encoding encoding. See !link for more details.';
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$this->fail(st($text, $replacements));
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}
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} catch (Exception $e) {
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$this->fail(st('Drupal could not determine the encoding of the database was set to UTF-8'));
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}
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}
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/**
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* Make PostgreSQL Drupal friendly.
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*/
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function initializeDatabase() {
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// We create some functions using global names instead of prefixing them
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// like we do with table names. This is so that we don't double up if more
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// than one instance of Drupal is running on a single database. We therefore
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// avoid trying to create them again in that case.
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try {
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// Create functions.
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db_query('CREATE OR REPLACE FUNCTION "greatest"(numeric, numeric) RETURNS numeric AS
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\'SELECT CASE WHEN (($1 > $2) OR ($2 IS NULL)) THEN $1 ELSE $2 END;\'
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LANGUAGE \'sql\''
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);
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db_query('CREATE OR REPLACE FUNCTION "greatest"(numeric, numeric, numeric) RETURNS numeric AS
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\'SELECT greatest($1, greatest($2, $3));\'
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LANGUAGE \'sql\''
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);
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// Don't use {} around pg_proc table.
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if (!db_query("SELECT COUNT(*) FROM pg_proc WHERE proname = 'rand'")->fetchField()) {
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db_query('CREATE OR REPLACE FUNCTION "rand"() RETURNS float AS
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\'SELECT random();\'
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LANGUAGE \'sql\''
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);
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}
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// Don't use {} around pg_proc table.
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if (!db_query("SELECT COUNT(*) FROM pg_proc WHERE proname = 'concat'")->fetchField()) {
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db_query('CREATE OR REPLACE FUNCTION "concat"(text, text) RETURNS text AS
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\'SELECT $1 || $2;\'
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LANGUAGE \'sql\''
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);
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}
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db_query('CREATE OR REPLACE FUNCTION "if"(boolean, text, text) RETURNS text AS
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\'SELECT CASE WHEN $1 THEN $2 ELSE $3 END;\'
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LANGUAGE \'sql\''
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);
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db_query('CREATE OR REPLACE FUNCTION "if"(boolean, integer, integer) RETURNS integer AS
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\'SELECT CASE WHEN $1 THEN $2 ELSE $3 END;\'
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LANGUAGE \'sql\''
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);
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db_query('CREATE OR REPLACE FUNCTION "substring_index"(text, text, integer) RETURNS text AS
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\'SELECT array_to_string((string_to_array($1, $2)) [1:$3], $2);\'
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LANGUAGE \'sql\''
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);
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$this->pass(st('PostgreSQL has initialized itself.'));
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}
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catch (Exception $e) {
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$this->fail(st('Drupal could not be correctly setup with the existing database. Please revise any errors.'));
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}
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}
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}
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