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<?php |
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namespace suda\database\statement; |
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use Countable; |
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use IteratorAggregate; |
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use suda\database\Binder; |
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use suda\database\exception\SQLException; |
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/** |
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* Trait PrepareTrait |
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* @package suda\database\statement |
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*/ |
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trait PrepareTrait |
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{ |
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/** |
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* 准备选择列 |
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* |
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* @param string|array $reads |
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* @param string $table |
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* @return string |
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*/ |
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protected function prepareReadFields($reads, string $table = ''):string |
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{ |
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if (is_string($reads)) { |
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$fields = $reads; |
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} else { |
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$field = []; |
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$prefix = strlen($table) ?"`{$table}`." :''; |
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foreach ($reads as $want) { |
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$field[] = $prefix."`$want`"; |
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} |
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$fields = implode(',', $field); |
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} |
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return $fields; |
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} |
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/** |
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* 准备条件列 |
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* |
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* @param array $where |
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* @return array |
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* @throws SQLException |
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*/ |
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protected function prepareWhere(array $where) |
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{ |
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$and = []; |
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$binders = []; |
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foreach ($where as $name => $value) { |
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$query = $this->getQueryForArray($name, $value); |
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$and[] = $query->getQuery(); |
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$binders = array_merge($binders, $query->getBinder()); |
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} |
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return [implode(' AND ', $and), $binders]; |
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} |
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/** |
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* @param string $name |
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* @param $value |
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* @return Query |
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* @throws SQLException |
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*/ |
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private function getQueryForArray(string $name, $value) |
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{ |
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if ($value instanceof IteratorAggregate) { |
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return $this->prepareIn($name, 'IN', $value); |
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} elseif (is_array($value)) { |
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list($op, $val) = $value; |
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$op = trim($op); |
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return $this->createQueryOperation($name, $op, $val); |
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} else { |
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return $this->createQueryOperation($name, '=', $value); |
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} |
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} |
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/** |
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* @param string $name |
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* @param string $operation |
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* @param string $indexName |
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* @param mixed $value |
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* @return Query |
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* @throws SQLException |
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*/ |
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private function createQueryOperation(string $name, string $operation, $value, string $indexName = '') |
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{ |
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if ($value instanceof Query) { |
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return new Query("`{$name}` {$operation} ".$value, $value->getBinder()); |
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} |
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if ($value instanceof Statement) { |
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return new Query("`{$name}` {$operation} (".$value->getQuery().')', $value->getBinder()); |
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} |
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if ($value instanceof IteratorAggregate || is_array($value)) { |
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return $this->prepareIn($name, $operation, $value); |
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} |
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if (strlen($indexName) === 0) { |
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$indexName = Binder::index($name); |
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} |
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return new Query("`{$name}` {$operation} :{$indexName}", [new Binder($indexName, $value)]); |
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} |
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/** |
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* @param string $where |
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* @param string $name |
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* @param $value |
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* @return Query |
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* @throws SQLException |
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*/ |
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private function getQueryForString(string $where, string $name, $value) |
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{ |
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if (is_array($value) || $value instanceof IteratorAggregate) { |
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list($inSQL, $binders) = $this->prepareInParameter($value, $name); |
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$where = $this->replaceQuote($name, $inSQL, $where); |
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return new Query($where, $binders); |
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} elseif ($value instanceof Binder) { |
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return new Query($where, [$value]); |
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} else { |
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return new Query($where, [new Binder($name, $value)]); |
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} |
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} |
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/** |
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* @param string $name |
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* @param string $replace |
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* @param string $target |
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* @return string |
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*/ |
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protected function replaceQuote(string $name, string $replace, string $target) { |
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$name = ltrim($name, ':'); |
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return preg_replace('/(?<!_):'.preg_quote($name).'/', $replace, $target); |
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} |
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/** |
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* @param string $where |
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* @param array $whereBinder |
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* @return array |
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* @throws SQLException |
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*/ |
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protected function prepareWhereString(string $where, array $whereBinder) |
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{ |
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$newWhereBinder = []; |
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foreach ($whereBinder as $name => $value) { |
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$query = $this->getQueryForString($where, $name, $value); |
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$where = $query->getQuery(); |
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$newWhereBinder = array_merge($newWhereBinder, $query->getBinder()); |
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} |
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return [$where, $newWhereBinder]; |
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} |
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/** |
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* 准备In |
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* |
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* @param string $name |
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* @param IteratorAggregate|array|Query|Statement $values |
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* @return Query |
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* @throws SQLException |
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*/ |
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protected function prepareIn(string $name, string $operation, $values) |
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{ |
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if ($values instanceof Query || $values instanceof Statement) { |
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return $this->createQueryOperation($name, 'in', $values); |
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} |
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list($inSQL, $binders) = $this->prepareInParameter($values, $name); |
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$sql = '`'.$name.'` '.strtoupper($operation).' ('.$inSQL.')'; |
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return new Query($sql, $binders); |
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} |
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/** |
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* @param IteratorAggregate|array $values |
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* @param string $name |
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* @return array |
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* @throws SQLException |
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*/ |
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protected function prepareInParameter($values, string $name) |
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{ |
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if ($this->count($values) <= 0) { |
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throw new SQLException('on field '.$name.' value can\'t be empty array'); |
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} |
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$names = []; |
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$binders = []; |
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foreach ($values as $value) { |
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$_name = Binder::index($name); |
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$binders[] = new Binder($_name, $value); |
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$names[] = ':'.$_name; |
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} |
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return [implode(',', $names), $binders]; |
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} |
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/** |
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* @param array|Countable|IteratorAggregate $value |
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* @return int |
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*/ |
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private function count($value) |
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{ |
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if (is_array($value) || $value instanceof Countable) { |
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return count($value); |
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} |
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return iterator_count($value); |
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} |
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/** |
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* 准备更新 |
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* |
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* @param array $data |
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* @return array |
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*/ |
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protected function prepareUpdateSet(array $data) |
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{ |
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$binders = []; |
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$sets = []; |
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foreach ($data as $name => $value) { |
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$_name = Binder::index($name); |
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$binders[] = new Binder($_name, $value, $name); |
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$sets[] = "`{$name}`=:{$_name}"; |
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} |
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return [implode(',', $sets), $binders]; |
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} |
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/** |
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* 编译 ? 字符 |
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* |
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* @param string $sql |
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* @param array $parameter |
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* @return array |
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*/ |
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protected function prepareQueryMark(string $sql, array $parameter) |
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{ |
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$binders = []; |
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$query = preg_replace_callback('/\?/', function ($match) use (&$binders, $parameter) { |
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$index = count($binders); |
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if (array_key_exists($index, $parameter)) { |
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$name = Binder::index($index); |
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if (is_array($parameter[$index]) || $parameter[$index] instanceof IteratorAggregate) { |
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list($inSQL, $inBinders) = $this->prepareInParameter($parameter[$index], $index); |
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$binders = array_merge($binders, $inBinders); |
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return $inSQL; |
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} else { |
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$binder = new Binder($name, $parameter[$index]); |
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$binders[] = $binder; |
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return ':'.$binder->getName(); |
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} |
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} |
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return $match[0]; |
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}, $sql); |
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return [$query, $binders]; |
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} |
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/** |
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* 合并绑定工具 |
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* |
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* @param Binder[] $binderArray |
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* @param array $parameter |
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* @return Binder[] |
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*/ |
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protected function mergeBinder(array $binderArray, array $parameter) |
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{ |
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foreach ($parameter as $key => $value) { |
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if (! ($value instanceof Binder)) { |
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$value = new Binder($key, $value); |
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} |
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if (!in_array($value, $binderArray)) { |
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$binderArray[] = $value; |
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} |
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} |
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return $binderArray; |
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} |
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} |
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