MDL-22076 temptables - warn and dropped on disposal

lib/ddl/postgres_sql_generator.php

@@ -54,13 +54,6 @@ class postgres_sql_generator extends sql_generator {
     public $rename_key_sql = null; //SQL sentence to rename one key (PostgreSQL doesn't support this!)
                                           //TABLENAME, OLDKEYNAME, NEWKEYNAME are dinamically replaced
 
-    /**
-     * Creates one new XMLDBpostgres7
-     */
-    public function __construct($mdb) {
-        parent::__construct($mdb);
-    }
-
     /**
      * Reset a sequence to the id field of a table.
      * @param string $table name of table or xmldb_table object
@@ -80,6 +73,27 @@ class postgres_sql_generator extends sql_generator {
         return array("ALTER SEQUENCE $this->prefix{$tablename}_id_seq RESTART WITH $value");
     }
 
+    /**
+     * Given one correct xmldb_table, returns the SQL statements
+     * to create temporary table (inside one array)
+     */
+    public function getCreateTempTableSQL($xmldb_table) {
+        $this->temptables->add_temptable($xmldb_table->getName());
+        $sqlarr = $this->getCreateTableSQL($xmldb_table);
+        $sqlarr = preg_replace('/^CREATE TABLE/', "CREATE TEMPORARY TABLE", $sqlarr);
+        return $sqlarr;
+    }
+
+    /**
+     * Given one correct xmldb_table and the new name, returns the SQL statements
+     * to drop it (inside one array)
+     */
+    public function getDropTempTableSQL($xmldb_table) {
+        $sqlarr = $this->getDropTableSQL($xmldb_table);
+        $this->temptables->delete_temptable($xmldb_table->getName());
+        return $sqlarr;
+    }
+
     /**
      * Given one XMLDB Type, lenght and decimals, returns the DB proper SQL type
      */