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Command.php
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Command.php
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<?php
/**
* @copyright Copyright (c) 2017 Dmitry Bashkarev
* @license https://github.com/bashkarev/clickhouse/blob/master/LICENSE
* @link https://github.com/bashkarev/clickhouse#readme
*/
namespace bashkarev\clickhouse;
use ClickHouseDB\Exception\QueryException;
use ClickHouseDB\Statement;
use Yii;
use yii\db\Exception;
/**
* @property Connection $db
*
* @author Dmitry Bashkarev <dmitry@bashkarev.com>
*/
class Command extends \yii\db\Command
{
/**
* @inheritdoc
*/
protected function queryInternal($method, $fetchMode = null)
{
$rawSql = $this->getRawSql();
Yii::info($rawSql, 'bashkarev\clickhouse\Command::query');
if ($method !== '') {
$info = $this->db->getQueryCacheInfo($this->queryCacheDuration, $this->queryCacheDependency);
if (is_array($info)) {
/* @var $cache \yii\caching\Cache */
$cache = $info[0];
$cacheKey = [
__CLASS__,
$method,
$fetchMode,
$this->db->dsn,
$this->db->username,
$rawSql,
];
$result = $cache->get($cacheKey);
if (is_array($result) && isset($result[0])) {
Yii::trace('Query result served from cache', 'bashkarev\clickhouse\Command::query');
return $result[0];
}
}
}
$token = $rawSql;
try {
Yii::beginProfile($token, 'bashkarev\clickhouse\Command::query');
$statement = $this->db->executeSelect($rawSql);
if ($method === '') {
return $statement->rows();
}
$result = call_user_func_array([$this, $method], [$statement, $fetchMode]);
Yii::endProfile($token, 'bashkarev\clickhouse\Command::query');
} catch (QueryException $e) {
Yii::endProfile($token, 'bashkarev\clickhouse\Command::query');
throw new Exception($e->getMessage());
} catch (\Exception $e) {
Yii::endProfile($token, 'bashkarev\clickhouse\Command::query');
throw $e;
}
if (isset($cache, $cacheKey, $info)) {
$cache->set($cacheKey, [$result], $info[1], $info[2]);
Yii::trace('Saved query result in cache', 'bashkarev\clickhouse\Command::query');
}
return $result;
}
/**
* @inheritdoc
*/
public function execute()
{
$rawSql = $this->getRawSql();
Yii::info($rawSql, __METHOD__);
if ($this->sql == '') {
return 0;
}
$token = $rawSql;
try {
Yii::beginProfile($token, __METHOD__);
$statement = $this->db->execute($rawSql);
$this->refreshTableSchema();
return (int)(!$statement->isError());
} catch (QueryException $e) {
Yii::endProfile($token, __METHOD__);
throw new Exception($e->getMessage());
} catch (\Exception $e) {
Yii::endProfile($token, __METHOD__);
throw $e;
}
}
/**
* @param int $size
* @return \Generator
* @throws \Exception
*/
public function queryBatchInternal($size)
{
// TODO: real batch select
$allRows = $this->queryAll();
$count = 0;
$index = 0;
$rows = [];
foreach ($allRows as $row) {
$count++;
$rows[$index] = $row;
if ($count >= $size) {
yield $rows;
$rows = [];
$count = 0;
}
$index++;
}
if ($rows !== []) {
yield $rows;
}
}
/**
* @param \ClickHouseDB\Statement $statement
* @param int $mode
* @return array
*/
protected function fetchAll(Statement $statement, $mode)
{
$result = $statement->rows();
if ($result === null) {
return [];
}
if ($mode !== \PDO::FETCH_COLUMN) {
return $result;
}
$firstRow = current($result);
if ($firstRow === false) {
return [];
}
$firstKey = current(array_keys($firstRow));
return array_column($result, $firstKey);
}
/**
* @param \ClickHouseDB\Statement $statement
* @param $mode
* @return bool|mixed
*/
protected function fetchColumn(Statement $statement, $mode)
{
$row = $statement->fetchOne();
if ($row === null) {
return false;
}
return current($row);
}
/**
* @param \ClickHouseDB\Statement $statement
* @param $mode
* @return bool|mixed
*/
protected function fetch(Statement $statement, $mode)
{
return $statement->fetchOne()??false;
}
}