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<?php |
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declare(strict_types=1); |
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namespace PhpMyAdmin\SqlParser\Components\Parsers; |
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use PhpMyAdmin\SqlParser\Components\Expression; |
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use PhpMyAdmin\SqlParser\Components\RenameOperation; |
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use PhpMyAdmin\SqlParser\Parseable; |
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use PhpMyAdmin\SqlParser\Parser; |
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use PhpMyAdmin\SqlParser\TokensList; |
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use PhpMyAdmin\SqlParser\TokenType; |
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use function implode; |
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/** |
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* `RENAME TABLE` keyword parser. |
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*/ |
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final class RenameOperations implements Parseable |
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{ |
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/** |
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* @param Parser $parser the parser that serves as context |
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* @param TokensList $list the list of tokens that are being parsed |
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* @param array<string, mixed> $options parameters for parsing |
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* |
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* @return RenameOperation[] |
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*/ |
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public static function parse(Parser $parser, TokensList $list, array $options = []): array |
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{ |
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$ret = []; |
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$expr = new RenameOperation(); |
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/** |
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* The state of the parser. |
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* |
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* Below are the states of the parser. |
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* |
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* 0 ---------------------[ old name ]--------------------> 1 |
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* |
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* 1 ------------------------[ TO ]-----------------------> 2 |
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* |
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* 2 ---------------------[ new name ]--------------------> 3 |
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* |
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* 3 ------------------------[ , ]------------------------> 0 |
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* 3 -----------------------[ else ]----------------------> (END) |
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* |
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* @var int |
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*/ |
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$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 ($token->type === TokenType::Delimiter) { |
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break; |
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} |
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// Skipping whitespaces and comments. |
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if (($token->type === TokenType::Whitespace) || ($token->type === TokenType::Comment)) { |
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continue; |
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} |
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if ($state === 0) { |
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$expr->old = Expression::parse( |
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$parser, |
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$list, |
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[ |
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'breakOnAlias' => true, |
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'parseField' => 'table', |
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], |
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); |
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if (empty($expr->old)) { |
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$parser->error('The old name of the table was expected.', $token); |
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} |
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$state = 1; |
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} elseif ($state === 1) { |
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if ($token->type !== TokenType::Keyword || $token->keyword !== 'TO') { |
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$parser->error('Keyword "TO" was expected.', $token); |
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break; |
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} |
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$state = 2; |
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} elseif ($state === 2) { |
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$expr->new = Expression::parse( |
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$parser, |
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$list, |
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[ |
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'breakOnAlias' => true, |
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'parseField' => 'table', |
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], |
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); |
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if (empty($expr->new)) { |
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$parser->error('The new name of the table was expected.', $token); |
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} |
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$state = 3; |
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} elseif ($state === 3) { |
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if (($token->type !== TokenType::Operator) || ($token->value !== ',')) { |
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2 |
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break; |
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} |
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$ret[] = $expr; |
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$expr = new RenameOperation(); |
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$state = 0; |
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} |
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} |
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if ($state !== 3) { |
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$parser->error('A rename operation was expected.', $list->tokens[$list->idx - 1]); |
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} |
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// Last iteration was not saved. |
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if (! empty($expr->old)) { |
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$ret[] = $expr; |
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} |
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--$list->idx; |
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return $ret; |
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} |
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/** @param RenameOperation[] $component the component to be built */ |
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public static function buildAll(array $component): string |
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{ |
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return implode(', ', $component); |
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} |
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} |
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phpmyadmin /
sql-parser
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