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<?php |
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declare(strict_types=1); |
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namespace MartinGeorgiev\Doctrine\ORM\Query\AST\Functions; |
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use Doctrine\ORM\Query\AST\Node; |
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use Doctrine\ORM\Query\AST\OrderByClause; |
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use Doctrine\ORM\Query\Lexer; |
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use Doctrine\ORM\Query\Parser; |
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use Doctrine\ORM\Query\SqlWalker; |
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/** |
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* Implementation of PostgreSql STRING_AGG(). |
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* |
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* @see https://www.postgresql.org/docs/9.5/functions-aggregate.html |
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* @since 1.4 |
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* |
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* @author Martin Georgiev <[email protected]> |
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*/ |
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class StringAgg extends BaseFunction |
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{ |
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/** |
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* @var bool |
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*/ |
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private $isDistinct = false; |
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/** |
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* @var Node |
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*/ |
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private $expression; |
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/** |
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* @var Node |
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*/ |
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private $delimiter; |
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/** |
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* @var OrderByClause|null |
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*/ |
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private $orderBy; |
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protected function customiseFunction(): void |
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{ |
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$this->setFunctionPrototype('string_agg(%s%s, %s%s)'); |
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} |
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public function parse(Parser $parser): void |
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{ |
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$this->customiseFunction(); |
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$parser->match(Lexer::T_IDENTIFIER); |
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$parser->match(Lexer::T_OPEN_PARENTHESIS); |
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$lexer = $parser->getLexer(); |
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if ($lexer->isNextToken(Lexer::T_DISTINCT)) { |
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$parser->match(Lexer::T_DISTINCT); |
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$this->isDistinct = true; |
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} |
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$this->expression = $parser->StringPrimary(); |
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$parser->match(Lexer::T_COMMA); |
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$this->delimiter = $parser->StringPrimary(); |
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if ($lexer->isNextToken(Lexer::T_ORDER)) { |
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$this->orderBy = $parser->OrderByClause(); |
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} |
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$parser->match(Lexer::T_CLOSE_PARENTHESIS); |
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} |
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public function getSql(SqlWalker $sqlWalker): string |
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{ |
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$dispatched = [ |
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$this->isDistinct ? 'distinct ' : '', |
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$this->expression->dispatch($sqlWalker), |
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$this->delimiter->dispatch($sqlWalker), |
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$this->orderBy ? $this->orderBy->dispatch($sqlWalker) : '', |
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]; |
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return \vsprintf($this->functionPrototype, $dispatched); |
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} |
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} |
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martin-georgiev /
postgresql-for-doctrine
