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 : AlterStatement.php

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

declare(strict_types=1);

namespace PhpMyAdmin\SqlParser\Statements;

use PhpMyAdmin\SqlParser\Components\AlterOperation;
use PhpMyAdmin\SqlParser\Components\Expression;
use PhpMyAdmin\SqlParser\Components\OptionsArray;
use PhpMyAdmin\SqlParser\Parser;
use PhpMyAdmin\SqlParser\Statement;
use PhpMyAdmin\SqlParser\Token;
use PhpMyAdmin\SqlParser\TokensList;
use function implode;

/**
 * `ALTER` statement.
 */
class AlterStatement extends Statement
{
    /**
     * Table affected.
     *
     * @var Expression
     */
    public $table;

/**
     * Column affected by this statement.
     *
     * @var AlterOperation[]
     */
    public $altered = [];

/**
     * Options of this statement.
     *
     * @var array
     */
    public static $OPTIONS = [
        'ONLINE' => 1,
        'OFFLINE' => 1,
        'IGNORE' => 2,

'DATABASE' => 3,
        'EVENT' => 3,
        'FUNCTION' => 3,
        'PROCEDURE' => 3,
        'SERVER' => 3,
        'TABLE' => 3,
        'TABLESPACE' => 3,
        'VIEW' => 3,
    ];

/**
     * @param Parser     $parser the instance that requests parsing
     * @param TokensList $list   the list of tokens to be parsed
     */
    public function parse(Parser $parser, TokensList $list)
    {
        ++$list->idx; // Skipping `ALTER`.
        $this->options = OptionsArray::parse(
            $parser,
            $list,
            static::$OPTIONS
        );
        ++$list->idx;

// Parsing affected table.
        $this->table = Expression::parse(
            $parser,
            $list,
            [
                'parseField' => 'table',
                'breakOnAlias' => true,
            ]
        );
        ++$list->idx; // Skipping field.

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

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) {
                $options = [];
                if ($this->options->has('DATABASE')) {
                    $options = AlterOperation::$DB_OPTIONS;
                } elseif ($this->options->has('TABLE')) {
                    $options = AlterOperation::$TABLE_OPTIONS;
                } elseif ($this->options->has('VIEW')) {
                    $options = AlterOperation::$VIEW_OPTIONS;
                }

$this->altered[] = AlterOperation::parse($parser, $list, $options);
                $state = 1;
            } elseif ($state === 1) {
                if (($token->type === Token::TYPE_OPERATOR) && ($token->value === ',')) {
                    $state = 0;
                }
            }
        }
    }

/**
     * @return string
     */
    public function build()
    {
        $tmp = [];
        foreach ($this->altered as $altered) {
            $tmp[] = $altered::build($altered);
        }

return 'ALTER ' . OptionsArray::build($this->options)
            . ' ' . Expression::build($this->table)
            . ' ' . implode(', ', $tmp);
    }
}

${this.title}

Code Editor : AlterStatement.php