column types

update to connection_string
remove Driver.quote

src/sqlite3/connection.cr

@@ -1,8 +1,7 @@
 class SQLite3::Connection < DB::Connection
-  def initialize(options)
+  def initialize(connection_string)
     super
-    filename = options["database"]
-    check LibSQLite3.open_v2(filename, out @db, (LibSQLite3::Flag::READWRITE | LibSQLite3::Flag::CREATE), nil)
+    check LibSQLite3.open_v2(connection_string, out @db, (LibSQLite3::Flag::READWRITE | LibSQLite3::Flag::CREATE), nil)
   end
 
   def prepare(query)

src/sqlite3/driver.cr

@@ -1,12 +1,6 @@
 class SQLite3::Driver < DB::Driver
   def build_connection
-    SQLite3::Connection.new(options)
-  end
-
-  # Quotes the given string, making it safe to use in an SQL statement.
-  # It replaces all instances of the single-quote character with two single-quote characters.
-  def self.quote(string)
-    string.gsub('\'', "''")
+    SQLite3::Connection.new(connection_string)
   end
 end
 

src/sqlite3/result_set2.cr

@@ -66,7 +66,15 @@ class SQLite3::ResultSet2 < DB::ResultSet
   end
 
   def column_type(index : Int32)
-    raise "not implemented"
+    case LibSQLite3.column_type(self, index)
+    when Type::INTEGER; Int64
+    when Type::FLOAT  ; Float64
+    when Type::BLOB   ; Slice(UInt8)
+    when Type::TEXT   ; String
+    when Type::NULL   ; Nil
+    else
+      raise "not implemented"
+    end
   end
 
   def to_unsafe