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<?php |
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namespace Staudenmeir\EloquentEagerLimit\Grammars\Traits; |
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use Illuminate\Database\Query\Builder; |
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trait CompilesGroupLimit |
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{ |
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/** |
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* Compile a select query into SQL. |
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* |
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* @param \Illuminate\Database\Query\Builder $query |
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* @return string |
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*/ |
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public function compileSelect(Builder $query) |
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{ |
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if (isset($query->groupLimit)) { |
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if (is_null($query->columns)) { |
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$query->columns = ['*']; |
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} |
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return $this->compileGroupLimit($query); |
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} |
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return parent::compileSelect($query); |
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} |
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/** |
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* Compile a group limit clause. |
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* |
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* @param \Illuminate\Database\Query\Builder $query |
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* @return string |
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*/ |
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protected function compileGroupLimit(Builder $query) |
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{ |
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$selectBindings = array_merge($query->getRawBindings()['select'], $query->getRawBindings()['order']); |
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$query->setBindings($selectBindings, 'select'); |
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$query->setBindings([], 'order'); |
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$limit = (int) $query->groupLimit['value']; |
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$offset = $query->offset; |
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if (isset($offset)) { |
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$limit += (int) $offset; |
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$query->offset = null; |
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} |
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$components = $this->compileComponents($query); |
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$components['columns'] .= $this->compileRowNumber($query->groupLimit['column'], $components['orders'] ?? ''); |
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unset($components['orders']); |
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$sql = $this->concatenate($components); |
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$sql = 'select * from ('.$sql.') as laravel_table where laravel_row <= '.$limit; |
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if (isset($offset)) { |
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$sql .= ' and laravel_row > '.(int) $offset; |
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} |
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return $sql.' order by laravel_row'; |
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} |
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/** |
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* Compile a row number clause. |
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* |
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* @param string $partition |
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* @param string $orders |
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* @return string |
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*/ |
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protected function compileRowNumber($partition, $orders) |
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{ |
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$partition = 'partition by '.$this->wrap($partition); |
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$over = trim($partition.' '.$orders); |
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return ', row_number() over ('.$over.') as laravel_row'; |
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} |
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} |
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staudenmeir /
eloquent-eager-limit
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