154 lines
3.9 KiB
PHP
Executable File
154 lines
3.9 KiB
PHP
Executable File
<?php
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/**
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* `ALTER` statement.
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*/
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namespace PhpMyAdmin\SqlParser\Statements;
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use PhpMyAdmin\SqlParser\Components\AlterOperation;
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use PhpMyAdmin\SqlParser\Components\Expression;
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use PhpMyAdmin\SqlParser\Components\OptionsArray;
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use PhpMyAdmin\SqlParser\Parser;
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use PhpMyAdmin\SqlParser\Statement;
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use PhpMyAdmin\SqlParser\Token;
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use PhpMyAdmin\SqlParser\TokensList;
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/**
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* `ALTER` statement.
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*
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* @category Statements
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*
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* @license https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
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*/
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class AlterStatement extends Statement
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{
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/**
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* Table affected.
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*
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* @var Expression
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*/
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public $table;
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/**
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* Column affected by this statement.
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*
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* @var AlterOperation[]
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*/
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public $altered = array();
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/**
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* Options of this statement.
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*
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* @var array
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*/
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public static $OPTIONS = array(
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'ONLINE' => 1,
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'OFFLINE' => 1,
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'IGNORE' => 2,
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'DATABASE' => 3,
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'EVENT' => 3,
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'FUNCTION' => 3,
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'PROCEDURE' => 3,
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'SERVER' => 3,
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'TABLE' => 3,
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'TABLESPACE' => 3,
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'USER' => 3,
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'VIEW' => 3
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);
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/**
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* @param Parser $parser the instance that requests parsing
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* @param TokensList $list the list of tokens to be parsed
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*/
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public function parse(Parser $parser, TokensList $list)
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{
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++$list->idx; // Skipping `ALTER`.
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$this->options = OptionsArray::parse(
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$parser,
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$list,
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static::$OPTIONS
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);
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++$list->idx;
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// Parsing affected table.
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$this->table = Expression::parse(
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$parser,
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$list,
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array(
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'parseField' => 'table',
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'breakOnAlias' => true
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)
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);
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++$list->idx; // Skipping field.
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/**
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* The state of the parser.
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*
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* Below are the states of the parser.
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*
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* 0 -----------------[ alter operation ]-----------------> 1
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*
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* 1 -------------------------[ , ]-----------------------> 0
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*
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* @var int
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*/
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$state = 0;
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for (; $list->idx < $list->count; ++$list->idx) {
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/**
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* Token parsed at this moment.
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*
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* @var Token
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*/
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$token = $list->tokens[$list->idx];
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// End of statement.
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if ($token->type === Token::TYPE_DELIMITER) {
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break;
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}
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// Skipping whitespaces and comments.
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if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
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continue;
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}
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if ($state === 0) {
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$options = array();
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if ($this->options->has('DATABASE')) {
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$options = AlterOperation::$DB_OPTIONS;
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} elseif ($this->options->has('TABLE')) {
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$options = AlterOperation::$TABLE_OPTIONS;
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} elseif ($this->options->has('VIEW')) {
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$options = AlterOperation::$VIEW_OPTIONS;
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} elseif ($this->options->has('USER')) {
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$options = AlterOperation::$USER_OPTIONS;
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}
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$this->altered[] = AlterOperation::parse($parser, $list, $options);
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$state = 1;
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} elseif ($state === 1) {
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if (($token->type === Token::TYPE_OPERATOR) && ($token->value === ',')) {
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$state = 0;
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}
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}
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}
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}
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/**
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* @return string
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*/
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public function build()
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{
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$tmp = array();
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foreach ($this->altered as $altered) {
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$tmp[] = $altered::build($altered);
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}
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return 'ALTER ' . OptionsArray::build($this->options)
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. ' ' . Expression::build($this->table)
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. ' ' . implode(', ', $tmp);
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}
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}
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