backtickTest.php

<?php
/**
 * backtick.php
 *
 * Test case for PHPSQLParser.
 *
 * PHP version 5
 *
 * LICENSE:
 * Copyright (c) 2010-2014 Justin Swanhart and André Rothe
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * @author    André Rothe <andre.rothe@phosco.info>
 * @copyright 2010-2014 Justin Swanhart and André Rothe
 * @license   http://www.debian.org/misc/bsd.license  BSD License (3 Clause)
 * @version   SVN: $Id$
 * 
 */
namespace PHPSQLParser\Test\Parser;
use PHPSQLParser\PHPSQLParser;
use PHPSQLParser\PHPSQLCreator;

class backtickTest extends \PHPUnit\Framework\TestCase {
	
    public function testBacktick() {
        $parser = new PHPSQLParser();

        $sql = 'SELECT c1.`some_column` or `c1`.`another_column` or c1.`some column` as `an alias`
                  from some_table an_alias group by `an alias`, `alias2`;';
        $parser->parse($sql);
        $p = $parser->parsed;
        $this->assertEquals('`an alias`', $parser->parsed['SELECT'][0]['alias']['name']);
        $this->assertEquals('c1.`some column`', $parser->parsed['SELECT'][0]['sub_tree'][4]['base_expr']);
        $this->assertEquals('alias', $parser->parsed['GROUP'][0]['expr_type']);


        $sql = "INSERT INTO test (`name`) VALUES ('ben\\'s test containing an escaped quote')";
        $parser->parse($sql);
        $p = $parser->parsed;
        $expected = getExpectedValue(dirname(__FILE__), 'backtick1.serialized');
        $this->assertEquals($expected, $p, "issue 35: ben's test");

    }
    public function generateRandomString($length = 10)
    {
        $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $randomString = '';
        for ($i = 0; $i < $length; $i++) {
            $randomString .= $characters[rand(0, strlen($characters) - 1)];
        }
        return $randomString;
    }

    public function createInFilter($len)
    {
        $arr = [];
        for ($i = 0; $i < $len; $i++) {
            $arr[] = $this->generateRandomString();
        }
        return '("' . implode($arr, '","') . '")';
    }

    public function testOptimizeBalanceBackticks()
    {
        $parser = new PHPSQLParser();

        // test backticks
        $sql = 'SELECT id, name from test where `id map` in ("a b c 1-2_3")';
        $obj = $parser->parse($sql);
        $creator = new PHPSQLCreator($obj);
        $sql2 = $creator->created;
        $this->assertTrue(mb_strtolower($sql) === mb_strtolower($sql2));

        // The more in conditions, the worse the performance
        // The difference before and after optimization is 10 times
        $sql = 'SELECT id,name from test where id in ' . $this->createInFilter(1024);
        $start = microtime(true);
        $parser->parse($sql);
        $cost = intval((microtime(true) - $start) * 1000);
        print_r('cost ' . $cost . PHP_EOL);
    }
}