Gecko [ gandhischool.edu.np ]

Name	Size	Permission
AlterStatement.php	3.68 KB	-rw-r--r--
AnalyzeStatement.php	636 B	-rw-r--r--
BackupStatement.php	527 B	-rw-r--r--
CallStatement.php	739 B	-rw-r--r--
CheckStatement.php	527 B	-rw-r--r--
ChecksumStatement.php	451 B	-rw-r--r--
CreateStatement.php	22.39 KB	-rw-r--r--
DeleteStatement.php	11.4 KB	-rw-r--r--
DropStatement.php	1.4 KB	-rw-r--r--
ExplainStatement.php	200 B	-rw-r--r--
InsertStatement.php	7.28 KB	-rw-r--r--
LoadStatement.php	10.81 KB	-rw-r--r--
LockStatement.php	3.41 KB	-rw-r--r--
MaintenanceStatement.php	1.47 KB	-rw-r--r--
NotImplementedStatement.php	1.34 KB	-rw-r--r--
OptimizeStatement.php	641 B	-rw-r--r--
PurgeStatement.php	3.76 KB	-rw-r--r--
RenameStatement.php	1.34 KB	-rw-r--r--
RepairStatement.php	570 B	-rw-r--r--
ReplaceStatement.php	5.21 KB	-rw-r--r--
RestoreStatement.php	477 B	-rw-r--r--
SelectStatement.php	7.26 KB	-rw-r--r--
SetStatement.php	1.98 KB	-rw-r--r--
ShowStatement.php	1.25 KB	-rw-r--r--
TransactionStatement.php	2.29 KB	-rw-r--r--
TruncateStatement.php	747 B	-rw-r--r--
UpdateStatement.php	2.28 KB	-rw-r--r--

Code Editor : LockStatement.php

<?php
/**
 * `LOCK` statement.
 */

declare(strict_types=1);

namespace PhpMyAdmin\SqlParser\Statements;

use PhpMyAdmin\SqlParser\Components\LockExpression;
use PhpMyAdmin\SqlParser\Parser;
use PhpMyAdmin\SqlParser\Statement;
use PhpMyAdmin\SqlParser\Token;
use PhpMyAdmin\SqlParser\TokensList;
use function trim;

/**
 * `LOCK` statement.
 */
class LockStatement extends Statement
{
    /**
     * Tables with their Lock expressions.
     *
     * @var LockExpression[]
     */
    public $locked = [];

/**
     * Whether it's a LOCK statement
     * if false, it's an UNLOCK statement
     */
    public $isLock = true;

/**
     * @param Parser     $parser the instance that requests parsing
     * @param TokensList $list   the list of tokens to be parsed
     */
    public function parse(Parser $parser, TokensList $list)
    {
        if ($list->tokens[$list->idx]->value === 'UNLOCK') {
            // this is in fact an UNLOCK statement
            $this->isLock = false;
        }

++$list->idx; // Skipping `LOCK`.

/**
         * The state of the parser.
         *
         * Below are the states of the parser.
         *
         *      0 ---------------- [ TABLES ] -----------------> 1
         *      1 -------------- [ lock_expr ] ----------------> 2
         *      2 ------------------ [ , ] --------------------> 1
         *
         * @var int
         */
        $state = 0;

/**
         * Previous parsed token
         */
        $prevToken = null;

for (; $list->idx < $list->count; ++$list->idx) {
            /**
             * Token parsed at this moment.
             *
             * @var Token
             */
            $token = $list->tokens[$list->idx];

// End of statement.
            if ($token->type === Token::TYPE_DELIMITER) {
                break;
            }

// Skipping whitespaces and comments.
            if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
                continue;
            }

if ($state === 0) {
                if ($token->type === Token::TYPE_KEYWORD) {
                    if ($token->keyword !== 'TABLES') {
                        $parser->error('Unexpected keyword.', $token);
                        break;
                    }

$state = 1;
                    continue;
                } else {
                    $parser->error('Unexpected token.', $token);
                    break;
                }
            } elseif ($state === 1) {
                if (! $this->isLock) {
                    // UNLOCK statement should not have any more tokens
                    $parser->error('Unexpected token.', $token);
                    break;
                }

$this->locked[] = LockExpression::parse($parser, $list);
                $state = 2;
            } elseif ($state === 2) {
                if ($token->value === ',') {
                    // move over to parsing next lock expression
                    $state = 1;
                }
            }

$prevToken = $token;
        }

if ($state !== 2 && $prevToken !== null) {
            $parser->error('Unexpected end of LOCK statement.', $prevToken);
        }
    }

/**
     * @return string
     */
    public function build()
    {
        return trim(($this->isLock ? 'LOCK' : 'UNLOCK')
            . ' TABLES ' . LockExpression::build($this->locked));
    }
}

${this.title}

Code Editor : LockStatement.php