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<?php
/**
* `INTO` keyword parser.
*
* @package SqlParser
* @subpackage Components
*/
namespace SqlParser\Components;
use SqlParser\Component;
use SqlParser\Parser;
use SqlParser\Token;
use SqlParser\TokensList;
/**
* `INTO` keyword parser.
*
* @category Keywords
* @package SqlParser
* @subpackage Components
* @author Dan Ungureanu <udan1107@gmail.com>
* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
*/
class IntoKeyword extends Component
{
/**
* Type of target (OUTFILE or SYMBOL).
*
* @var string
*/
public $type;
/**
* The destination, which can be a table or a file.
*
* @var string|Expression
*/
public $dest;
/**
* The name of the columns.
*
* @var array
*/
public $columns;
/**
* @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 IntoKeyword
*/
public static function parse(Parser $parser, TokensList $list, array $options = array())
{
$ret = new IntoKeyword();
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -----------------------[ name ]----------------------> 1
* 0 ---------------------[ OUTFILE ]---------------------> 2
*
* 1 ------------------------[ ( ]------------------------> (END)
*
* 2 ---------------------[ filename ]--------------------> 1
*
* @var int $state
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token $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) || ($token->type === Token::TYPE_COMMENT)) {
continue;
}
if (($token->type === Token::TYPE_KEYWORD) && ($token->flags & Token::FLAG_KEYWORD_RESERVED)) {
if (($state === 0) && ($token->value === 'OUTFILE')) {
$ret->type = 'OUTFILE';
$state = 2;
continue;
}
// No other keyword is expected.
break;
}
if ($state === 0) {
$ret->dest = Expression::parse(
$parser,
$list,
array(
'parseField' => 'table',
'breakOnAlias' => true,
)
);
$state = 1;
} elseif ($state === 1) {
if (($token->type === Token::TYPE_OPERATOR) && ($token->value === '(')) {
$ret->columns = ArrayObj::parse($parser, $list)->values;
++$list->idx;
}
break;
} elseif ($state === 2) {
$ret->dest = $token->value;
++$list->idx;
break;
}
}
--$list->idx;
return $ret;
}
/**
* @param IntoKeyword $component The component to be built.
* @param array $options Parameters for building.
*
* @return string
*/
public static function build($component, array $options = array())
{
if ($component->dest instanceof Expression) {
$columns = !empty($component->columns) ?
'(' . implode(', ', $component->columns) . ')' : '';
return $component->dest . $columns;
} else {
return 'OUTFILE "' . $component->dest . '"';
}
}
}