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<?php |
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/** |
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* This file is part of Phuria SQL Builder package. |
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* |
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* Copyright (c) 2016 Beniamin Jonatan Šimko |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Phuria\QueryBuilder\Expression; |
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use Phuria\QueryBuilder\ExprBuilder; |
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/** |
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* @author Beniamin Jonatan Šimko <[email protected]> |
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*/ |
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class FunctionExpression implements ExpressionInterface |
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{ |
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const FUNC_ASCI = 'ASCI'; |
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const FUNC_BIN = 'BIN'; |
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const FUNC_BIT_LENGTH = 'BIT_LENGTH'; |
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const FUNC_CHAR = 'CHAR'; |
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const FUNC_COALESCE = 'COALESCE'; |
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const FUNC_CONCAT = 'CONCAT'; |
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const FUNC_CONCAT_WS = 'CONCAT_WS'; |
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const FUNC_ELT = 'ELT'; |
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const FUNC_EXPORT_SET = 'EXPORT_SET'; |
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const FUNC_FIELD = 'FIELD'; |
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const FUNC_IFNULL = 'IFNULL'; |
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const FUNC_MAX = 'MAX'; |
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const FUNC_SUM = 'SUM'; |
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const FUNC_YEAR = 'YEAR'; |
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/** |
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* @var string $functionName |
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*/ |
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private $functionName; |
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/** |
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* @var ExpressionInterface $args |
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*/ |
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private $arguments; |
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/** |
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* @var FunctionCallContext|null $context |
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*/ |
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private $context; |
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/** |
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* @param string $functionName |
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* @param ExpressionInterface $arguments |
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* @param FunctionCallContext|null $context |
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*/ |
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public function __construct($functionName, ExpressionInterface $arguments, FunctionCallContext $context = null) |
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{ |
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$this->functionName = $functionName; |
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$this->arguments = $arguments; |
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$this->context = $context; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function compile() |
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{ |
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$expression = $this->arguments; |
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if ($expression instanceof ExprBuilder) { |
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$expression = $expression->getWrappedExpression(); |
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} |
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if ($expression instanceof ExpressionCollection) { |
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$expression = $expression->changeSeparator(', '); |
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} |
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return $this->functionName . '(' . $expression->compile() . $this->compileHints() . ')'; |
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} |
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/** |
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* @return string |
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*/ |
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private function compileHints() |
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{ |
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if (null === $this->context) { |
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return ''; |
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} |
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$compiledHints = []; |
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foreach ($this->context->getCallHints() as $hint) { |
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$compiledHints[] = $hint->compile(); |
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} |
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return implode('', $compiledHints); |
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} |
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} |