diff --git a/src/Dibi/Helpers.php b/src/Dibi/Helpers.php
index 07e15dfb..9ad7aaf5 100644
--- a/src/Dibi/Helpers.php
+++ b/src/Dibi/Helpers.php
@@ -12,6 +12,9 @@ class Helpers
 {
 	use Strict;
 
+	/** @var array */
+	private static $types;
+
 	/**
 	 * Prints out a syntax highlighted version of the SQL command or Result.
 	 * @param  string|Result
@@ -129,4 +132,45 @@ class Helpers
 		}
 	}
 
+
+	/**
+	 * Heuristic type detection.
+	 * @param  string
+	 * @return string|NULL
+	 * @internal
+	 */
+	public static function detectType($type)
+	{
+		static $patterns = [
+			'^_' => Type::TEXT, // PostgreSQL arrays
+			'BYTEA|BLOB|BIN' => Type::BINARY,
+			'TEXT|CHAR|POINT|INTERVAL' => Type::TEXT,
+			'YEAR|BYTE|COUNTER|SERIAL|INT|LONG|SHORT' => Type::INTEGER,
+			'CURRENCY|REAL|MONEY|FLOAT|DOUBLE|DECIMAL|NUMERIC|NUMBER' => Type::FLOAT,
+			'^TIME$' => Type::TIME,
+			'TIME' => Type::DATETIME, // DATETIME, TIMESTAMP
+			'DATE' => Type::DATE,
+			'BOOL' => Type::BOOL,
+		];
+
+		foreach ($patterns as $s => $val) {
+			if (preg_match("#$s#i", $type)) {
+				return $val;
+			}
+		}
+		return NULL;
+	}
+
+
+	/**
+	 * @internal
+	 */
+	public static function getTypeCache()
+	{
+		if (self::$types === NULL) {
+			self::$types = new HashMap([__CLASS__, 'detectType']);
+		}
+		return self::$types;
+	}
+
 }
diff --git a/src/Dibi/Reflection/Column.php b/src/Dibi/Reflection/Column.php
index 6f26581a..b8b34ace 100644
--- a/src/Dibi/Reflection/Column.php
+++ b/src/Dibi/Reflection/Column.php
@@ -29,9 +29,6 @@ class Column
 {
 	use Dibi\Strict;
 
-	/** @var array */
-	private static $types;
-
 	/** @var Dibi\Reflector|NULL when created by Result */
 	private $reflector;
 
@@ -99,7 +96,7 @@ class Column
 	 */
 	public function getType()
 	{
-		return self::getTypeCache()->{$this->info['nativetype']};
+		return Dibi\Helpers::getTypeCache()->{$this->info['nativetype']};
 	}
 
 
@@ -166,45 +163,4 @@ class Column
 		return isset($this->info['vendor'][$key]) ? $this->info['vendor'][$key] : NULL;
 	}
 
-
-	/**
-	 * Heuristic type detection.
-	 * @param  string
-	 * @return string|NULL
-	 * @internal
-	 */
-	public static function detectType($type)
-	{
-		static $patterns = [
-			'^_' => Type::TEXT, // PostgreSQL arrays
-			'BYTEA|BLOB|BIN' => Type::BINARY,
-			'TEXT|CHAR|POINT|INTERVAL' => Type::TEXT,
-			'YEAR|BYTE|COUNTER|SERIAL|INT|LONG|SHORT' => Type::INTEGER,
-			'CURRENCY|REAL|MONEY|FLOAT|DOUBLE|DECIMAL|NUMERIC|NUMBER' => Type::FLOAT,
-			'^TIME$' => Type::TIME,
-			'TIME' => Type::DATETIME, // DATETIME, TIMESTAMP
-			'DATE' => Type::DATE,
-			'BOOL' => Type::BOOL,
-		];
-
-		foreach ($patterns as $s => $val) {
-			if (preg_match("#$s#i", $type)) {
-				return $val;
-			}
-		}
-		return NULL;
-	}
-
-
-	/**
-	 * @internal
-	 */
-	public static function getTypeCache()
-	{
-		if (self::$types === NULL) {
-			self::$types = new Dibi\HashMap([__CLASS__, 'detectType']);
-		}
-		return self::$types;
-	}
-
 }
diff --git a/src/Dibi/Result.php b/src/Dibi/Result.php
index fc7f88b9..d49cb11d 100644
--- a/src/Dibi/Result.php
+++ b/src/Dibi/Result.php
@@ -468,7 +468,7 @@ class Result implements IDataSource
 	 */
 	private function detectTypes()
 	{
-		$cache = Reflection\Column::getTypeCache();
+		$cache = Helpers::getTypeCache();
 		try {
 			foreach ($this->getResultDriver()->getResultColumns() as $col) {
 				$this->types[$col['name']] = $cache->{$col['nativetype']};