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<?php |
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namespace ClickHouseDB\Query; |
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use ClickHouseDB\Exception\QueryException; |
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use function sizeof; |
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class Query |
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{ |
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/** |
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* @var string |
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*/ |
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protected $sql; |
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/** |
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* @var string|null |
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*/ |
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protected $format = null; |
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/** |
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* @var array |
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*/ |
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private $degenerations = []; |
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/** |
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* Query constructor. |
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* @param string $sql |
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* @param array $degenerations |
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*/ |
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public function __construct($sql, $degenerations = []) |
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{ |
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if (!trim($sql)) |
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{ |
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throw new QueryException('Empty Query'); |
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} |
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$this->sql = $sql; |
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$this->degenerations = $degenerations; |
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} |
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/** |
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* @param string|null $format |
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*/ |
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public function setFormat($format) |
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{ |
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$this->format = $format; |
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} |
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private function applyFormatQuery() |
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{ |
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// FORMAT\s(\w)*$ |
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if (null === $this->format) { |
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return false; |
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} |
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$supportFormats = |
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"FORMAT\\s+TSV|FORMAT\\s+TSVRaw|FORMAT\\s+TSVWithNames|FORMAT\\s+TSVWithNamesAndTypes|FORMAT\\s+Vertical|FORMAT\\s+JSONCompact|FORMAT\\s+JSONEachRow|FORMAT\\s+TSKV|FORMAT\\s+TabSeparatedWithNames|FORMAT\\s+TabSeparatedWithNamesAndTypes|FORMAT\\s+TabSeparatedRaw|FORMAT\\s+BlockTabSeparated|FORMAT\\s+CSVWithNames|FORMAT\\s+CSV|FORMAT\\s+JSON|FORMAT\\s+TabSeparated"; |
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$matches = []; |
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if (preg_match_all('%(' . $supportFormats . ')%ius', $this->sql, $matches)) { |
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// skip add "format json" |
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if (isset($matches[0])) |
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{ |
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$this->format = trim(str_ireplace('format', '', $matches[0][0])); |
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} |
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} else { |
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$this->sql = $this->sql . ' FORMAT ' . $this->format; |
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} |
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} |
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/** |
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* @return null|string |
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*/ |
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public function getFormat() |
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{ |
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return $this->format; |
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} |
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public function toSql() |
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{ |
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if ($this->format !== null) { |
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$this->applyFormatQuery(); |
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} |
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if (sizeof($this->degenerations)) |
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{ |
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foreach ($this->degenerations as $degeneration) |
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{ |
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if ($degeneration instanceof Degeneration) { |
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$this->sql = $degeneration->process($this->sql); |
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} |
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} |
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} |
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return $this->sql; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return $this->toSql(); |
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} |
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} |
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smi2 /
phpClickHouse
