827 lines
26 KiB
PHP
827 lines
26 KiB
PHP
<?php
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/**
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* @package sapphire
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* @subpackage model
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*/
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/**
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* PostgreSQL connector class.
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* @package sapphire
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* @subpackage model
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*/
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class PostgreSQLDatabase extends Database {
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/**
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* Connection to the DBMS.
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* @var resource
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*/
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private $dbConn;
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/**
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* True if we are connected to a database.
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* @var boolean
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*/
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private $active;
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/**
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* The name of the database.
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* @var string
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*/
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private $database;
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/**
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* Connect to a PostgreSQL database.
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* @param array $parameters An map of parameters, which should include:
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* - server: The server, eg, localhost
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* - username: The username to log on with
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* - password: The password to log on with
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* - database: The database to connect to
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*/
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public function __construct($parameters) {
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($parameters['username']!='') ? $username=' user=' . $parameters['username'] : $username='';
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($parameters['password']!='') ? $password=' password=' . $parameters['password'] : $password='';
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//assumes that the server and dbname will always be provided:
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$this->dbConn = pg_connect('host=' . $parameters['server'] . ' port=5432 dbname=' . $parameters['database'] . $username . $password);
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//By virtue of getting here, the connection is active:
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$this->active=true;
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$this->database = $parameters['database'];
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if(!$this->dbConn) {
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$this->databaseError("Couldn't connect to PostgreSQL database");
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}
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parent::__construct();
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}
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/**
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* Not implemented, needed for PDO
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*/
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public function getConnect($parameters) {
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return null;
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}
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/**
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* Returns true if this database supports collations
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* @return boolean
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*/
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public function supportsCollations() {
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return $this->getVersion() >= 4.1;
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}
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/**
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* The version of MySQL.
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* @var float
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*/
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private $pgsqlVersion;
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/**
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* Get the version of MySQL.
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* @return float
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*/
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public function getVersion() {
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if(!$this->pgsqlVersion) {
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//returns something like this: PostgreSQL 8.3.3 on i386-apple-darwin9.3.0, compiled by GCC i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5465)
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$postgres=strlen('PostgreSQL ');
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$db_version=$this->query("SELECT VERSION()")->value();
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$this->pgsqlVersion = (float)trim(substr($db_version, $postgres, strpos($db_version, ' on ')));
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}
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return $this->pgsqlVersion;
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}
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/**
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* Get the database server, namely mysql.
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* @return string
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*/
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public function getDatabaseServer() {
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return "postgresql";
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}
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public function query($sql, $errorLevel = E_USER_ERROR) {
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if(isset($_REQUEST['previewwrite']) && in_array(strtolower(substr($sql,0,strpos($sql,' '))), array('insert','update','delete','replace'))) {
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Debug::message("Will execute: $sql");
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return;
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}
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if(isset($_REQUEST['showqueries'])) {
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$starttime = microtime(true);
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}
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/*
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echo 'sql: ' . $sql . '<br>';
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*/
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$handle = pg_query($this->dbConn, $sql);
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if(isset($_REQUEST['showqueries'])) {
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$endtime = round(microtime(true) - $starttime,4);
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Debug::message("\n$sql\n{$endtime}ms\n", false);
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}
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DB::$lastQuery=$handle;
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if(!$handle && $errorLevel) $this->databaseError("Couldn't run query: $sql | " . pgsql_error($this->dbConn), $errorLevel);
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return new PostgreSQLQuery($this, $handle);
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}
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public function getGeneratedID($table) {
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$result=DB::query("SELECT last_value FROM \"{$table}_ID_seq\";");
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$row=$result->first();
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return $row['last_value'];
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}
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/**
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* OBSOLETE: Get the ID for the next new record for the table.
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*
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* @var string $table The name od the table.
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* @return int
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*/
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public function getNextID($table) {
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user_error('getNextID is OBSOLETE (and will no longer work properly)', E_USER_WARNING);
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$result = $this->query("SELECT MAX(ID)+1 FROM \"$table\"")->value();
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return $result ? $result : 1;
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}
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public function isActive() {
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return $this->active ? true : false;
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}
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public function createDatabase() {
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$this->query("CREATE DATABASE $this->database");
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//$this->query("USE $this->database");
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//$this->tableList = $this->fieldList = $this->indexList = null;
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//if(mysql_select_db($this->database, $this->dbConn)) {
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// $this->active = true;
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// return true;
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//}
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}
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/**
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* Drop the database that this object is currently connected to.
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* Use with caution.
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*/
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public function dropDatabase() {
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$this->query("DROP DATABASE $this->database");
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}
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/**
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* Returns the name of the currently selected database
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*/
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public function currentDatabase() {
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return $this->database;
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}
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/**
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* Switches to the given database.
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* If the database doesn't exist, you should call createDatabase() after calling selectDatabase()
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*/
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public function selectDatabase($dbname) {
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$this->database = $dbname;
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if($this->databaseExists($this->database)) mysql_select_db($this->database, $this->dbConn);
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$this->tableList = $this->fieldList = $this->indexList = null;
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}
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/**
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* Returns true if the named database exists.
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*/
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public function databaseExists($name) {
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$SQL_name = Convert::raw2sql($name);
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return $this->query("SHOW DATABASES LIKE '$SQL_name'")->value() ? true : false;
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}
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public function createTable($tableName, $fields = null, $indexes = null) {
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$fieldSchemas = $indexSchemas = "";
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if($fields) foreach($fields as $k => $v) $fieldSchemas .= "\"$k\" $v,\n";
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//if($indexes) foreach($indexes as $k => $v) $indexSchemas .= $this->getIndexSqlDefinition($k, $v) . ",\n";
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//we need to generate indexes like this: CREATE INDEX IX_vault_to_export ON vault (to_export);
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//If we have a fulltext search request, then we need to create a special column
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//for GiST searches
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echo 'creating table with these indexes:<pre>';
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print_r($indexes);
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echo '</pre>';
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$fulltexts='';
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foreach($indexes as $this_index){
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if($this_index['type']=='fulltext'){
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//ALTER TABLE tblMessages ADD COLUMN idxFTI tsvector;
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//CREATE INDEX ix_vault_indexed_words ON vault_indexed USING gist(words);
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$fulltexts.=$this_index['name'] . ' tsvector, ';
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}
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}
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if($indexes) foreach($indexes as $k => $v) $indexSchemas .= $this->getIndexSqlDefinition($tableName, $k, $v) . "\n";
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$this->query("CREATE TABLE \"$tableName\" (
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\"ID\" SERIAL8 NOT NULL,
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$fieldSchemas
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$fulltexts
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primary key (\"ID\")
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); $indexSchemas");
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}
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/**
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* Alter a table's schema.
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* @param $table The name of the table to alter
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* @param $newFields New fields, a map of field name => field schema
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* @param $newIndexes New indexes, a map of index name => index type
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* @param $alteredFields Updated fields, a map of field name => field schema
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* @param $alteredIndexes Updated indexes, a map of index name => index type
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*/
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public function alterTable($tableName, $newFields = null, $newIndexes = null, $alteredFields = null, $alteredIndexes = null) {
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$fieldSchemas = $indexSchemas = "";
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$alterList = array();
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if($newFields) foreach($newFields as $k => $v) $alterList[] .= "ADD \"$k\" $v";
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//if($newIndexes) foreach($newIndexes as $k => $v) $alterList[] .= "ADD " . $this->getIndexSqlDefinition($tableName, $k, $v);
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if($alteredFields) foreach($alteredFields as $k => $v) $alterList[] .= "CHANGE \"$k\" \"$k\" $v";
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/*
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echo 'alterations:<pre>';
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print_r($newFields);
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echo '</pre>';
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*/
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//DB ABSTRACTION: we need to change the constraints to be a separate 'add' command,
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//see http://www.postgresql.org/docs/8.1/static/sql-altertable.html
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if($alteredIndexes) foreach($alteredIndexes as $k => $v) {
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$alterList[] .= "DROP INDEX \"$k\"";
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$alterList[] .= "ADD ". $this->getIndexSqlDefinition($tableName, $k, $v);
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}
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if($alterList) {
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$alterations = implode(",\n", $alterList);
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$this->query("ALTER TABLE \"$tableName\" " . $alterations);
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}
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}
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public function renameTable($oldTableName, $newTableName) {
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$this->query("ALTER TABLE \"$oldTableName\" RENAME \"$newTableName\"");
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}
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/**
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* Checks a table's integrity and repairs it if necessary.
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* @var string $tableName The name of the table.
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* @return boolean Return true if the table has integrity after the method is complete.
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*/
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public function checkAndRepairTable($tableName) {
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//if(!$this->runTableCheckCommand("VACUUM FULL \"$tableName\"")) {
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// Database::alteration_message("Table $tableName: repaired","repaired");
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// return $this->runTableCheckCommand("REPAIR TABLE \"$tableName\" USE_FRM");
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//} else {
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// return true;
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//}
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$this->runTableCheckCommand("VACUUM FULL \"$tableName\"");
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return true;
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}
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/**
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* Helper function used by checkAndRepairTable.
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* @param string $sql Query to run.
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* @return boolean Returns if the query returns a successful result.
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*/
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protected function runTableCheckCommand($sql) {
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$testResults = $this->query($sql);
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foreach($testResults as $testRecord) {
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if(strtolower($testRecord['Msg_text']) != 'ok') {
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return false;
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}
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}
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return true;
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}
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public function createField($tableName, $fieldName, $fieldSpec) {
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$this->query("ALTER TABLE \"$tableName\" ADD \"$fieldName\" $fieldSpec");
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}
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/**
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* Change the database type of the given field.
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* @param string $tableName The name of the tbale the field is in.
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* @param string $fieldName The name of the field to change.
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* @param string $fieldSpec The new field specification
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*/
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public function alterField($tableName, $fieldName, $fieldSpec) {
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// This wee function was built for MoT. It will preserve the binary format of the content,
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// but change the character set
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/*
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$changes = $this->query("SELECT ID, \"$fieldName\" FROM \"$tableName\"")->map();
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*/
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$this->query("ALTER TABLE \"$tableName\" CHANGE \"$fieldName\" \"$fieldName\" $fieldSpec");
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// This wee function was built for MoT. It will preserve the binary format of the content,
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// but change the character set
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/*
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echo "<li>Fixing " . sizeof($changes) . " page's contnet";
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foreach($changes as $id => $text) {
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$SQL_text = Convert::raw2sql($text);
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$this->query("UPDATE \"$tableName\" SET \"$fieldName\" = '$SQL_text' WHERE \"ID\" = '$id'");
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}
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*/
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}
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/**
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* Change the database column name of the given field.
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*
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* @param string $tableName The name of the tbale the field is in.
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* @param string $oldName The name of the field to change.
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* @param string $newName The new name of the field
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*/
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public function renameField($tableName, $oldName, $newName) {
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$fieldList = $this->fieldList($tableName);
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if(array_key_exists($oldName, $fieldList)) {
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$this->query("ALTER TABLE \"$tableName\" CHANGE \"$oldName\" \"$newName\" " . $fieldList[$oldName]);
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}
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}
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public function fieldList($table) {
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$fields = $this->query("SELECT b.attname FROM pg_class a
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INNER JOIN pg_attribute b ON a.relfilenode=b.attrelid
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WHERE a.relname='$table'
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AND NOT b.attisdropped AND b.attnum>0")->column();
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$output = array();
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if($fields) foreach($fields as $field) {
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$output[$field] = true;
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}
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return $output;
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}
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/**
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* Create an index on a table.
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* @param string $tableName The name of the table.
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* @param string $indexName The name of the index.
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* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
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*/
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public function createIndex($tableName, $indexName, $indexSpec) {
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//$this->query("ALTER TABLE \"$tableName\" ADD " . $this->getIndexSqlDefinition($indexName, $indexSpec));
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$this->query($this->getIndexSqlDefinition($tableName, $indexName, $indexSpec));
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}
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protected function getIndexSqlDefinition($tableName, $indexName, $indexSpec) {
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//$indexSpec = trim($indexSpec);
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//if($indexSpec[0] != '(') list($indexType, $indexFields) = explode(' ',$indexSpec,2);
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//else $indexFields = $indexSpec;
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//if(!isset($indexType)) {
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// $indexType = 'create index';
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//}
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//CREATE INDEX IX_vault_to_export ON vault (to_export);
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echo 'index spec:<pre>';
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print_r($indexSpec);
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echo '</pre>';
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if(!isset($indexSpec['type'])){
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//It's not the best method, but to keep things simple, we've allowed unique indexes to be
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//specified as inline strings. So now we need to detect 'unique (' as the first word, and
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//do things differently if that's the case.
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//The alternative is to force unique indexes to adopt the complex index method (below)
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$indexSpec=$indexSpec['sql'];
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$unique='';
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if(substr($indexSpec, 0, 8)=='unique ('){
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$unique='unique ';
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$indexSpec=substr($indexSpec, 8);
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}
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$indexSpec=trim($indexSpec, '()');
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$bits=explode(',', $indexSpec);
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$indexes="\"" . implode("\",\"", $bits) . "\"";
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echo 'the indexes are ' . $indexes . '<br>';
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return 'create ' . $unique . 'index ix_' . $tableName . '_' . $indexName . " ON \"" . $tableName . "\" (" . $indexes . ');';
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} else {
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//create a type-specific index
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if($indexSpec['type']=='fulltext'){
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return 'create index ix_' . $tableName . '_' . $indexSpec['name'] . " ON \"" . $tableName . "\" USING gist(" . $indexSpec['name'] . ');';
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}
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}
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//return "$indexType \"$indexName\" $indexFields";
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}
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/**
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* Alter an index on a table.
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* @param string $tableName The name of the table.
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* @param string $indexName The name of the index.
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* @param string $indexSpec The specification of the index, see Database::requireIndex() for more details.
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*/
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public function alterIndex($tableName, $indexName, $indexSpec) {
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$indexSpec = trim($indexSpec);
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if($indexSpec[0] != '(') {
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list($indexType, $indexFields) = explode(' ',$indexSpec,2);
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} else {
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$indexFields = $indexSpec;
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}
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if(!$indexType) {
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$indexType = "index";
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}
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//$this->query("ALTER TABLE \"$tableName\" DROP INDEX \"$indexName\"");
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$this->query("DROP INDEX $indexName");
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$this->query("ALTER TABLE \"$tableName\" ADD $indexType \"$indexName\" $indexFields");
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}
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/**
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* Return the list of indexes in a table.
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* @param string $table The table name.
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* @return array
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*/
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public function indexList($table) {
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/*$indexes = DB::query("SHOW INDEXES IN \"$table\"");
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foreach($indexes as $index) {
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$groupedIndexes[$index['Key_name']]['fields'][$index['Seq_in_index']] = $index['Column_name'];
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if($index['Index_type'] == 'FULLTEXT') {
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$groupedIndexes[$index['Key_name']]['type'] = 'fulltext ';
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} else if(!$index['Non_unique']) {
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$groupedIndexes[$index['Key_name']]['type'] = 'unique ';
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} else {
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$groupedIndexes[$index['Key_name']]['type'] = '';
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}
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}
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foreach($groupedIndexes as $index => $details) {
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ksort($details['fields']);
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$indexList[$index] = $details['type'] . '(' . implode(',',$details['fields']) . ')';
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}
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return $indexList;*/
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//Obtained by starting postgres with the -E option:
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$indexes=DB::query("SELECT c.relname as \"Name\",
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CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' END as \"Type\",
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r.rolname as \"Owner\",
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c2.relname as \"Table\"
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FROM pg_catalog.pg_class c
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JOIN pg_catalog.pg_roles r ON r.oid = c.relowner
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LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
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LEFT JOIN pg_catalog.pg_index i ON i.indexrelid = c.oid
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LEFT JOIN pg_catalog.pg_class c2 ON i.indrelid = c2.oid
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WHERE c.relkind IN ('i','')
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AND n.nspname <> 'pg_catalog'
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AND n.nspname !~ '^pg_toast'
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AND pg_catalog.pg_table_is_visible(c.oid)
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AND c2.relname='$table' AND c.relkind='index';");
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//DB ABSTRACTION: TODO: we are not getting actual index information here, just the basic existence stuff:
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foreach($indexes as $index) {
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/*$groupedIndexes[$index['Key_name']]['fields'][$index['Seq_in_index']] = $index['Column_name'];
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if($index['Index_type'] == 'FULLTEXT') {
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$groupedIndexes[$index['Key_name']]['type'] = 'fulltext ';
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} else if(!$index['Non_unique']) {
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$groupedIndexes[$index['Key_name']]['type'] = 'unique ';
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} else {
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$groupedIndexes[$index['Key_name']]['type'] = '';
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}*/
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$indexList[$index['Name']]=$index['Name'];
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}
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|
|
|
//foreach($groupedIndexes as $index => $details) {
|
|
//ksort($details['fields']);
|
|
//$indexList[$index] = $details['type'] . '(' . implode(',',$details['fields']) . ')';
|
|
|
|
//}
|
|
|
|
//echo 'index list: <pre>';
|
|
//print_r($indexList);
|
|
//echo '</pre>';
|
|
/*
|
|
echo "<p style='color:red; font-weight: bold;'>INDEX LIST TRIGGERED (LINE 375 POSTGRESQLDATABASE.PHP</p>";
|
|
*/
|
|
return $indexList;
|
|
|
|
}
|
|
|
|
/**
|
|
* Returns a list of all the tables in the database.
|
|
* Table names will all be in lowercase.
|
|
* @return array
|
|
*/
|
|
public function tableList() {
|
|
foreach($this->query("SELECT tablename FROM pg_tables WHERE tablename NOT ILIKE 'pg_%' AND tablename NOT ILIKE 'sql_%'") as $record) {
|
|
$table = strtolower(reset($record));
|
|
$tables[$table] = $table;
|
|
}
|
|
return isset($tables) ? $tables : null;
|
|
}
|
|
|
|
/**
|
|
* Return the number of rows affected by the previous operation.
|
|
* @return int
|
|
*/
|
|
public function affectedRows() {
|
|
return pg_affected_rows(DB::$lastQuery);
|
|
}
|
|
|
|
/**
|
|
* A function to return the field names and datatypes for the particular table
|
|
*/
|
|
public function tableDetails($tableName){
|
|
$query="SELECT a.attname as \"Column\", pg_catalog.format_type(a.atttypid, a.atttypmod) as \"Datatype\" FROM pg_catalog.pg_attribute a WHERE a.attnum > 0 AND NOT a.attisdropped AND a.attrelid = ( SELECT c.oid FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relname ~ '^($tableName)$' AND pg_catalog.pg_table_is_visible(c.oid));";
|
|
$result=DB::query($query);
|
|
|
|
$table=Array();
|
|
while($row=pg_fetch_assoc($result)){
|
|
$table[]=Array('Column'=>$row['Column'], 'DataType'=>$row['DataType']);
|
|
}
|
|
|
|
return $table;
|
|
}
|
|
|
|
/**
|
|
* Return a boolean type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function boolean($values){
|
|
//Annoyingly, we need to do a good old fashioned switch here:
|
|
($values['default']) ? $default='true' : $default='false';
|
|
|
|
return 'boolean not null default ' . $default;
|
|
}
|
|
|
|
/**
|
|
* Return a date type-formatted string
|
|
* For MySQL, we simply return the word 'date', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function date($values){
|
|
//For reference, this is what typically gets passed to this function:
|
|
//$parts=Array('datatype'=>'date');
|
|
//DB::requireField($this->tableName, $this->name, "date");
|
|
|
|
return 'date';
|
|
}
|
|
|
|
/**
|
|
* Return a decimal type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function decimal($values){
|
|
//For reference, this is what typically gets passed to this function:
|
|
//$parts=Array('datatype'=>'decimal', 'precision'=>"$this->wholeSize,$this->decimalSize");
|
|
//DB::requireField($this->tableName, $this->name, "decimal($this->wholeSize,$this->decimalSize)");
|
|
|
|
return 'decimal(' . (int)$values['precision'] . ')';
|
|
}
|
|
|
|
/**
|
|
* Return a enum type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function enum($values){
|
|
//Enums are a bit different. We'll be creating a varchar(255) with a constraint of all the usual
|
|
//enum options.
|
|
//NOTE: In this one instance, we are including the table name in the values array
|
|
|
|
return "varchar(255) not null default '" . $values['default'] . "' check (\"" . $values['name'] . "\" in ('" . implode('\', \'', $values['enums']) . "'))";
|
|
|
|
}
|
|
|
|
/**
|
|
* Return a float type-formatted string
|
|
* For MySQL, we simply return the word 'date', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function float($values){
|
|
//For reference, this is what typically gets passed to this function:
|
|
//$parts=Array('datatype'=>'float');
|
|
//DB::requireField($this->tableName, $this->name, "float");
|
|
|
|
return 'float';
|
|
}
|
|
|
|
/**
|
|
* Return a int type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function int($values){
|
|
//We'll be using an 8 digit precision to keep it in line with the serial8 datatype for ID columns
|
|
return 'numeric(8) not null default ' . (int)$values['default'];
|
|
}
|
|
|
|
/**
|
|
* Return a datetime type-formatted string
|
|
* For PostgreSQL, we simply return the word 'timestamp', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function ssdatetime($values){
|
|
//For reference, this is what typically gets passed to this function:
|
|
//$parts=Array('datatype'=>'datetime');
|
|
//DB::requireField($this->tableName, $this->name, $values);
|
|
|
|
return 'timestamp';
|
|
}
|
|
|
|
/**
|
|
* Return a text type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function text($values){
|
|
//For reference, this is what typically gets passed to this function:
|
|
//$parts=Array('datatype'=>'mediumtext', 'character set'=>'utf8', 'collate'=>'utf8_general_ci');
|
|
//DB::requireField($this->tableName, $this->name, "mediumtext character set utf8 collate utf8_general_ci");
|
|
|
|
return 'text';
|
|
}
|
|
|
|
/**
|
|
* Return a time type-formatted string
|
|
* For MySQL, we simply return the word 'time', no other parameters are necessary
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function time($values){
|
|
//For reference, this is what typically gets passed to this function:
|
|
//$parts=Array('datatype'=>'time');
|
|
//DB::requireField($this->tableName, $this->name, "time");
|
|
|
|
return 'time';
|
|
}
|
|
|
|
/**
|
|
* Return a varchar type-formatted string
|
|
*
|
|
* @params array $values Contains a tokenised list of info about this data type
|
|
* @return string
|
|
*/
|
|
public function varchar($values){
|
|
//For reference, this is what typically gets passed to this function:
|
|
//$parts=Array('datatype'=>'varchar', 'precision'=>$this->size, 'character set'=>'utf8', 'collate'=>'utf8_general_ci');
|
|
//DB::requireField($this->tableName, $this->name, "varchar($this->size) character set utf8 collate utf8_general_ci");
|
|
|
|
return 'varchar(' . $values['precision'] . ')';
|
|
}
|
|
|
|
function escape_character($escape=false){
|
|
if($escape)
|
|
return "\\\"";
|
|
else
|
|
return "\"";
|
|
}
|
|
|
|
/**
|
|
* Create a fulltext search datatype for MySQL
|
|
*
|
|
* @param array $spec
|
|
*/
|
|
function fulltext($table, $spec){
|
|
//CREATE INDEX ix_vault_indexed_words ON vault_indexed USING gist(words);
|
|
//$spec['name'] is the column we've created that holds all the words we want to index.
|
|
//This is a coalesced collection of multiple columns if necessary
|
|
$spec='create index ix_' . $table . '_' . $spec['name'] . ' on ' . $table . ' using gist(' . $spec['name'] . ');';
|
|
|
|
return $spec;
|
|
}
|
|
|
|
/**
|
|
* Returns true if this table exists
|
|
* @todo Make a proper implementation
|
|
*/
|
|
function hasTable($tableName) {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Return enum values for the given field
|
|
* @todo Make a proper implementation
|
|
*/
|
|
function enumValuesForField($tableName, $fieldName) {
|
|
return array('SiteTree','Page');
|
|
}
|
|
|
|
/**
|
|
* Convert a SQLQuery object into a SQL statement
|
|
* @todo There is a lot of duplication between this and MySQLDatabase::sqlQueryToString(). Perhaps they could both call a common
|
|
* helper function in Database?
|
|
*/
|
|
public function sqlQueryToString(SQLQuery $sqlQuery) {
|
|
if (!$sqlQuery->from) return '';
|
|
$distinct = $sqlQuery->distinct ? "DISTINCT " : "";
|
|
if($sqlQuery->delete) {
|
|
$text = "DELETE ";
|
|
} else if($sqlQuery->select) {
|
|
$text = "SELECT $distinct" . implode(", ", $sqlQuery->select);
|
|
}
|
|
$text .= " FROM " . implode(" ", $sqlQuery->from);
|
|
|
|
if($sqlQuery->where) $text .= " WHERE (" . $sqlQuery->getFilter(). ")";
|
|
if($sqlQuery->groupby) $text .= " GROUP BY " . implode(", ", $sqlQuery->groupby);
|
|
if($sqlQuery->having) $text .= " HAVING ( " . implode(" ) AND ( ", $sqlQuery->having) . " )";
|
|
if($sqlQuery->orderby) $text .= " ORDER BY " . $sqlQuery->orderby;
|
|
|
|
if($sqlQuery->limit) {
|
|
$limit = $sqlQuery->limit;
|
|
// Pass limit as array or SQL string value
|
|
if(is_array($limit)) {
|
|
if(!array_key_exists('limit',$limit)) user_error('SQLQuery::limit(): Wrong format for $limit', E_USER_ERROR);
|
|
|
|
if(isset($limit['start']) && is_numeric($limit['start']) && isset($limit['limit']) && is_numeric($limit['limit'])) {
|
|
$combinedLimit = (int)$limit['start'] . ',' . (int)$limit['limit'];
|
|
} elseif(isset($limit['limit']) && is_numeric($limit['limit'])) {
|
|
$combinedLimit = (int)$limit['limit'];
|
|
} else {
|
|
$combinedLimit = false;
|
|
}
|
|
if(!empty($combinedLimit)) $this->limit = $combinedLimit;
|
|
|
|
} else {
|
|
$text .= " LIMIT " . $sqlQuery->limit;
|
|
}
|
|
}
|
|
|
|
return $text;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A result-set from a MySQL database.
|
|
* @package sapphire
|
|
* @subpackage model
|
|
*/
|
|
class PostgreSQLQuery extends Query {
|
|
/**
|
|
* The MySQLDatabase object that created this result set.
|
|
* @var MySQLDatabase
|
|
*/
|
|
private $database;
|
|
|
|
/**
|
|
* The internal MySQL handle that points to the result set.
|
|
* @var resource
|
|
*/
|
|
private $handle;
|
|
|
|
/**
|
|
* Hook the result-set given into a Query class, suitable for use by sapphire.
|
|
* @param database The database object that created this query.
|
|
* @param handle the internal mysql handle that is points to the resultset.
|
|
*/
|
|
public function __construct(PostgreSQLDatabase $database, $handle) {
|
|
$this->database = $database;
|
|
$this->handle = $handle;
|
|
parent::__construct();
|
|
}
|
|
|
|
public function __destroy() {
|
|
//mysql_free_result($this->handle);
|
|
}
|
|
|
|
public function seek($row) {
|
|
//return mysql_data_seek($this->handle, $row);
|
|
//This is unnecessary in postgres. You can just provide a row number with the fetch
|
|
//command.
|
|
}
|
|
|
|
public function numRecords() {
|
|
return pg_num_rows($this->handle);
|
|
}
|
|
|
|
public function nextRecord() {
|
|
// Coalesce rather than replace common fields.
|
|
if($data = pg_fetch_row($this->handle)) {
|
|
foreach($data as $columnIdx => $value) {
|
|
$columnName = pg_field_name($this->handle, $columnIdx);
|
|
// $value || !$ouput[$columnName] means that the *last* occurring value is shown
|
|
// !$ouput[$columnName] means that the *first* occurring value is shown
|
|
if(isset($value) || !isset($output[$columnName])) {
|
|
$output[$columnName] = $value;
|
|
}
|
|
}
|
|
return $output;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
|
|
?>
|