/
AlterStatement.php
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/
AlterStatement.php
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<?php
declare(strict_types=1);
namespace PhpMyAdmin\SqlParser\Statements;
use PhpMyAdmin\SqlParser\Components\AlterOperation;
use PhpMyAdmin\SqlParser\Components\Expression;
use PhpMyAdmin\SqlParser\Components\OptionsArray;
use PhpMyAdmin\SqlParser\Parser;
use PhpMyAdmin\SqlParser\Statement;
use PhpMyAdmin\SqlParser\TokensList;
use PhpMyAdmin\SqlParser\TokenType;
use function implode;
use function trim;
/**
* `ALTER` statement.
*/
class AlterStatement extends Statement
{
/**
* Table affected.
*/
public Expression|null $table = null;
/**
* Column affected by this statement.
*
* @var AlterOperation[]|null
*/
public array|null $altered = [];
/**
* Options of this statement.
*
* @var array<string, int|array<int, int|string>>
* @psalm-var array<string, (positive-int|array{positive-int, ('var'|'var='|'expr'|'expr=')})>
*/
public static array $statementOptions = [
'ONLINE' => 1,
'OFFLINE' => 1,
'IGNORE' => 2,
// `DEFINER` is also used for `ALTER EVENT`
'DEFINER' => [
2,
'expr=',
],
'DATABASE' => 3,
'EVENT' => 3,
'FUNCTION' => 3,
'PROCEDURE' => 3,
'SERVER' => 3,
'TABLE' => 3,
'TABLESPACE' => 3,
'USER' => 3,
'VIEW' => 3,
];
/**
* @param Parser $parser the instance that requests parsing
* @param TokensList $list the list of tokens to be parsed
*/
public function parse(Parser $parser, TokensList $list): void
{
++$list->idx; // Skipping `ALTER`.
$parsedOptions = OptionsArray::parse($parser, $list, static::$statementOptions);
if ($parsedOptions->isEmpty()) {
$parser->error('Unrecognized alter operation.', $list->tokens[$list->idx]);
return;
}
$this->options = $parsedOptions;
++$list->idx;
// Parsing affected table.
$this->table = Expression::parse(
$parser,
$list,
[
'parseField' => 'table',
'breakOnAlias' => true,
],
);
++$list->idx; // Skipping field.
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -----------------[ alter operation ]-----------------> 1
*
* 1 -------------------------[ , ]-----------------------> 0
*
* @var int
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*/
$token = $list->tokens[$list->idx];
// End of statement.
if ($token->type === TokenType::Delimiter) {
break;
}
// Skipping whitespaces and comments.
if (($token->type === TokenType::Whitespace) || ($token->type === TokenType::Comment)) {
continue;
}
if ($state === 0) {
$options = [];
if ($this->options->has('DATABASE')) {
$options = AlterOperation::DATABASE_OPTIONS;
} elseif ($this->options->has('TABLE')) {
$options = AlterOperation::TABLE_OPTIONS;
} elseif ($this->options->has('VIEW')) {
$options = AlterOperation::VIEW_OPTIONS;
} elseif ($this->options->has('USER')) {
$options = AlterOperation::USER_OPTIONS;
} elseif ($this->options->has('EVENT')) {
$options = AlterOperation::EVENT_OPTIONS;
}
$this->altered[] = AlterOperation::parse($parser, $list, $options);
$state = 1;
} elseif ($state === 1) {
if (($token->type === TokenType::Operator) && ($token->value === ',')) {
$state = 0;
}
}
}
}
public function build(): string
{
$tmp = [];
foreach ($this->altered as $altered) {
$tmp[] = $altered->build();
}
return trim(
'ALTER ' . $this->options->build()
. ' ' . $this->table->build()
. ' ' . implode(', ', $tmp),
);
}
}