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<?php |
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/** |
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* `WITH` statement. |
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*/ |
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declare(strict_types=1); |
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namespace PhpMyAdmin\SqlParser\Statements; |
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use PhpMyAdmin\SqlParser\Components\Array2d; |
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use PhpMyAdmin\SqlParser\Components\OptionsArray; |
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use PhpMyAdmin\SqlParser\Components\WithKeyword; |
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use PhpMyAdmin\SqlParser\Statement; |
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use PhpMyAdmin\SqlParser\Parser; |
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use PhpMyAdmin\SqlParser\Token; |
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use PhpMyAdmin\SqlParser\TokensList; |
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use RuntimeException; |
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use function array_slice; |
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use function count; |
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/** |
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* `WITH` statement. |
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* WITH [RECURSIVE] query_name [ (column_name [,...]) ] AS (SELECT ...) [, ...] |
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*/ |
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class WithStatement extends Statement |
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{ |
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/** |
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* Options for `WITH` statements and their slot ID. |
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* |
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* @var array |
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*/ |
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public static $OPTIONS = ['RECURSIVE' => 1]; |
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/** |
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* The clauses of this statement, in order. |
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* |
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* @see Statement::$CLAUSES |
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* |
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* @var array |
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*/ |
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public static $CLAUSES = [ |
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'WITH' => [ |
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'WITH', |
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2, |
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], |
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// Used for options. |
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'_OPTIONS' => [ |
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'_OPTIONS', |
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1, |
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], |
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'AS' => [ |
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'AS', |
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2, |
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], |
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]; |
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/** @var WithKeyword[] */ |
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public $withers = []; |
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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 `WITH`. |
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// parse any options if provided |
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$this->options = OptionsArray::parse( |
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$parser, |
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$list, |
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static::$OPTIONS |
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); |
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++$list->idx; |
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$state = 0; |
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$wither = null; |
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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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* @var Token |
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*/ |
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$token = $list->tokens[$list->idx]; |
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// Skipping whitespaces and comments. |
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if ($token->type === Token::TYPE_WHITESPACE || $token->type === Token::TYPE_COMMENT) { |
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continue; |
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} |
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if ($token->type === Token::TYPE_NONE) { |
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$wither = $token->value; |
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$this->withers[$wither] = new WithKeyword($wither); |
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$state = 1; |
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continue; |
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} |
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if ($state === 1) { |
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if ($token->value === '(') { |
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$this->withers[$wither]->columns = Array2d::parse($parser, $list); |
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continue; |
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} |
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if ($token->keyword === 'AS') { |
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++$list->idx; |
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$state = 2; |
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continue; |
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} |
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} elseif ($state === 2) { |
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if ($token->value === '(') { |
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++$list->idx; |
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$subList = $this->getSubTokenList($list); |
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$subParser = new Parser($subList); |
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if (count($subParser->errors)) { |
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foreach ($subParser->errors as $error) { |
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$parser->error($error); |
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} |
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} |
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$this->withers[$wither]->statement = $subParser; |
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continue; |
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} |
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if ($token->value === ',') { |
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$list->idx++; |
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$state = 0; |
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continue; |
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} |
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// nothing else |
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break; |
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} |
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} |
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--$list->idx; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function build() |
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{ |
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$str = 'WITH '; |
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foreach ($this->withers as $wither) { |
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$str .= $str === 'WITH ' ? '' : ', '; |
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$str .= WithKeyword::build($wither); |
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} |
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return $str; |
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} |
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private function getSubTokenList(TokensList $list): TokensList |
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{ |
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$idx = $list->idx; |
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/** @var Token $token */ |
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$token = $list->tokens[$list->idx]; |
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$openParenthesis = 0; |
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while ($list->idx < $list->count) { |
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// var_dump($idx, $token->value); |
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if ($token->value === '(') { |
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++$openParenthesis; |
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} elseif ($token->value === ')') { |
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if (--$openParenthesis === -1) { |
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break; |
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} |
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} |
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$token = $list->tokens[++$list->idx]; |
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} |
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if ($list->idx === $list->count) { |
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throw new RuntimeException('Syntax error no matching closing parenthesis.'); |
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} |
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$length = $list->idx - $idx; |
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return new TokensList(array_slice($list->tokens, $idx, $length), $length); |
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} |
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} |
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phpmyadmin /
sql-parser
