183 lines
4.9 KiB
PHP
183 lines
4.9 KiB
PHP
<?php
|
|
|
|
/**
|
|
* `RENAME TABLE` keyword parser.
|
|
*/
|
|
|
|
namespace PhpMyAdmin\SqlParser\Components;
|
|
|
|
use PhpMyAdmin\SqlParser\Component;
|
|
use PhpMyAdmin\SqlParser\Parser;
|
|
use PhpMyAdmin\SqlParser\Token;
|
|
use PhpMyAdmin\SqlParser\TokensList;
|
|
|
|
/**
|
|
* `RENAME TABLE` keyword parser.
|
|
*
|
|
* @category Keywords
|
|
*
|
|
* @license https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
|
|
*/
|
|
class RenameOperation extends Component
|
|
{
|
|
/**
|
|
* The old table name.
|
|
*
|
|
* @var Expression
|
|
*/
|
|
public $old;
|
|
|
|
/**
|
|
* The new table name.
|
|
*
|
|
* @var Expression
|
|
*/
|
|
public $new;
|
|
|
|
/**
|
|
* Constructor.
|
|
*
|
|
* @param Expression $old old expression
|
|
* @param Expression $new new expression containing new name
|
|
*/
|
|
public function __construct($old = null, $new = null)
|
|
{
|
|
$this->old = $old;
|
|
$this->new = $new;
|
|
}
|
|
|
|
/**
|
|
* @param Parser $parser the parser that serves as context
|
|
* @param TokensList $list the list of tokens that are being parsed
|
|
* @param array $options parameters for parsing
|
|
*
|
|
* @return RenameOperation[]
|
|
*/
|
|
public static function parse(Parser $parser, TokensList $list, array $options = array())
|
|
{
|
|
$ret = array();
|
|
|
|
$expr = new self();
|
|
|
|
/**
|
|
* The state of the parser.
|
|
*
|
|
* Below are the states of the parser.
|
|
*
|
|
* 0 ---------------------[ old name ]--------------------> 1
|
|
*
|
|
* 1 ------------------------[ TO ]-----------------------> 2
|
|
*
|
|
* 2 ---------------------[ new name ]--------------------> 3
|
|
*
|
|
* 3 ------------------------[ , ]------------------------> 0
|
|
* 3 -----------------------[ else ]----------------------> (END)
|
|
*
|
|
* @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) {
|
|
$expr->old = Expression::parse(
|
|
$parser,
|
|
$list,
|
|
array(
|
|
'breakOnAlias' => true,
|
|
'parseField' => 'table'
|
|
)
|
|
);
|
|
if (empty($expr->old)) {
|
|
$parser->error(
|
|
'The old name of the table was expected.',
|
|
$token
|
|
);
|
|
}
|
|
$state = 1;
|
|
} elseif ($state === 1) {
|
|
if ($token->type === Token::TYPE_KEYWORD && $token->keyword === 'TO') {
|
|
$state = 2;
|
|
} else {
|
|
$parser->error(
|
|
'Keyword "TO" was expected.',
|
|
$token
|
|
);
|
|
break;
|
|
}
|
|
} elseif ($state === 2) {
|
|
$expr->new = Expression::parse(
|
|
$parser,
|
|
$list,
|
|
array(
|
|
'breakOnAlias' => true,
|
|
'parseField' => 'table'
|
|
)
|
|
);
|
|
if (empty($expr->new)) {
|
|
$parser->error(
|
|
'The new name of the table was expected.',
|
|
$token
|
|
);
|
|
}
|
|
$state = 3;
|
|
} elseif ($state === 3) {
|
|
if (($token->type === Token::TYPE_OPERATOR) && ($token->value === ',')) {
|
|
$ret[] = $expr;
|
|
$expr = new self();
|
|
$state = 0;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($state !== 3) {
|
|
$parser->error(
|
|
'A rename operation was expected.',
|
|
$list->tokens[$list->idx - 1]
|
|
);
|
|
}
|
|
|
|
// Last iteration was not saved.
|
|
if (! empty($expr->old)) {
|
|
$ret[] = $expr;
|
|
}
|
|
|
|
--$list->idx;
|
|
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* @param RenameOperation $component the component to be built
|
|
* @param array $options parameters for building
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function build($component, array $options = array())
|
|
{
|
|
if (is_array($component)) {
|
|
return implode(', ', $component);
|
|
}
|
|
|
|
return $component->old . ' TO ' . $component->new;
|
|
}
|
|
}
|