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<?php |
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declare(strict_types=1); |
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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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use function array_merge; |
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use function implode; |
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/** |
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* `ALTER` statement. |
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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|null |
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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[]|null |
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*/ |
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public $altered = []; |
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/** |
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* Options of this statement. |
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* |
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* @var array<string, int|array<int, int|string>> |
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* @psalm-var array<string, (positive-int|array{positive-int, ('var'|'var='|'expr'|'expr=')})> |
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*/ |
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public static $OPTIONS = [ |
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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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$this->options = OptionsArray::parse($parser, $list, static::$OPTIONS); |
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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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[ |
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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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$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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$options = []; |
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if ($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::$USER_OPTIONS; |
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} elseif ($this->options->has('EVENT')) { |
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$options = array_merge(AlterOperation::$EVENT_OPTIONS, ['EVENT' => 0]); |
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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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$tmp = []; |
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foreach ($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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phpmyadmin /
sql-parser
