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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Query |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Query\Traits\Clause; |
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use Phossa2\Query\Misc\Template; |
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use Phossa2\Query\Interfaces\Clause\ColInterface; |
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use Phossa2\Query\Interfaces\Statement\SelectStatementInterface; |
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/** |
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* ColTrait |
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* |
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* Implementation of ColInterface |
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* |
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* @package Phossa2\Query |
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* @author Hong Zhang <[email protected]> |
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* @see ColInterface |
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* @version 2.0.0 |
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* @since 2.0.0 added |
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*/ |
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trait ColTrait |
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{ |
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use AbstractTrait; |
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/** |
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* @var bool |
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* @access protected |
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*/ |
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protected $is_distinct = false; |
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/** |
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* {@inheritDoc} |
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*/ |
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public function col($col = '', /*# string */ $alias = '') |
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{ |
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return $this->realCol($col, $alias); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function distinct() |
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{ |
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$this->is_distinct = true; |
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return $this->col(func_get_args()); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function cnt(/*# string */ $col, /*# string */ $alias = '') |
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{ |
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return $this->colTpl('COUNT(%s)', $col, $alias); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function min(/*# string */ $col, /*# string */ $alias = '') |
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{ |
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return $this->colTpl('MIN(%s)', $col, $alias); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function max(/*# string */ $col, /*# string */ $alias = '') |
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{ |
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return $this->colTpl('MAX(%s)', $col, $alias); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function avg(/*# string */ $col, /*# string */ $alias = '') |
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{ |
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return $this->colTpl('AVG(%s)', $col, $alias); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function sum(/*# string */ $col, /*# string */ $alias = '') |
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{ |
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return $this->colTpl('SUM(%s)', $col, $alias); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function colTpl( |
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/*# string */ $template, |
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$col, |
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/*# string */ $alias = '' |
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) { |
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return $this->realCol(new Template($template, $col), $alias); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function colRaw(/*# string */ $rawString, array $params = []) |
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{ |
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$rawString = $this->positionedParam($rawString, $params); |
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return $this->realCol($rawString, '', true); |
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} |
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/** |
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* @param mixed $col column/field specification[s] |
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* @param string $alias column alias name |
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* @param bool $rawMode raw mode |
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*/ |
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protected function realCol( |
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$col, |
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/*# string */ $alias = '', |
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$rawMode = false |
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) { |
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if (empty($col)) { |
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return $this; |
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} elseif (is_array($col)) { |
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$this->multipleCol($col, $rawMode); |
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} else { |
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$clause = &$this->getClause('COL'); |
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$raw = $this->isRaw($col, $rawMode); |
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if ('' === $alias) { |
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$clause[] = [$col, $raw]; |
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} else { |
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$clause[(string) $alias] = [$col, $raw]; |
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} |
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} |
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return $this; |
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} |
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/** |
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* from multiple tables |
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* |
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* @param array $cols |
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* @param bool $rawMode |
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* @access protected |
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*/ |
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protected function multipleCol(array $cols, /*# bool */ $rawMode) |
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{ |
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foreach ($cols as $key => $val) { |
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if (is_int($key)) { |
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$this->realCol($val, '', $rawMode); |
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} else { |
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$this->realCol($key, $val, $rawMode); |
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} |
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} |
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} |
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/** |
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* Build fields |
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* |
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* @param strin $prefix prefix afront of the clause |
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* @param array $settings |
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* @return string |
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* @access protected |
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*/ |
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protected function buildCol( |
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/*# string */ $prefix, |
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array $settings |
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)/*# : string */ { |
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$clause = &$this->getClause('COL'); |
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if ($this instanceof SelectStatementInterface && empty($clause)) { |
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$clauseParts = ['*']; |
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} else { |
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$clauseParts = []; |
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} |
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return $this->buildClause('COL', $prefix, $settings, $clauseParts); |
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} |
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/** |
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* Build DISTINCT |
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* |
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* @param string $prefix |
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* @param array $settings |
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* @return string |
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* @access protected |
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*/ |
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protected function buildDistinct( |
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/*# string */ $prefix, |
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array $settings |
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)/*# : string */ { |
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return $this->is_distinct ? ' DISTINCT' : $prefix; |
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} |
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} |
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