{"id":1361,"date":"2014-01-25T01:10:11","date_gmt":"2014-01-24T16:10:11","guid":{"rendered":"http:\/\/kazu.tv\/blog\/?p=1361"},"modified":"2014-01-25T10:14:09","modified_gmt":"2014-01-25T01:14:09","slug":"postgresql-geometric-functions-in-squeryl","status":"publish","type":"post","link":"https:\/\/kazu.tv\/blog\/2014\/01\/25\/postgresql-geometric-functions-in-squeryl\/","title":{"rendered":"Squeryl\u3067PostgreSQL\u306egeometry\u95a2\u9023\u95a2\u6570\u3092\u4f7f\u3046"},"content":{"rendered":"

\u4ee5\u524d\u5225\u30d6\u30ed\u30b0\u3067\u3001Squeryl\u3067\u6700\u521d\u304b\u3089\u306f\u7528\u610f\u3055\u308c\u3066\u3044\u306a\u3044\u96c6\u8a08\u95a2\u6570\uff08median\uff09\u3092\u5b9f\u88c5\u3059\u308b\u3001\u3068\u3044\u3046\u30a8\u30f3\u30c8\u30ea\u3092\u66f8\u3044\u305f<\/a>\u3002\u4eca\u56de\u306f\u305d\u308c\u3068\u4f3c\u305f\u5185\u5bb9\u3067\u3001PostgreSQL\u306e\u4f4d\u7f6e\u60c5\u5831\u306e\u95a2\u6570<\/a>\u3092Squeryl\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u308b\u3002<\/p>\n

Squeryl 0.9.5-6<\/p>\n

\u8ddd\u96e2\u3092\u8abf\u3079\u308bSQL<\/h2>\n

\u4eca\u56de\u4f7f\u3044\u305f\u3044\u306e\u306f\u30012\u70b9\u9593\u306e\u8ddd\u96e2\u3092\u8abf\u3079\u308b <-> \u3068\u3044\u3046\u95a2\u6570\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30af\u30a8\u30ea\u30fc\u306e\u3088\u3046\u306b\u3001\u3042\u308b\u4f4d\u7f6e(36.726637,139.526557)\u304b\u30893000m\u4ee5\u5185\u306b\u3042\u308b\u70b9\u306e\u3046\u3061\u3001\u8ddd\u96e2\u304c\u8fd1\u3044\u9806\u306b30\u4ef6\u53d6\u5f97\u3057\u305f\u3044\u3068\u3059\u308b\u3002\u3053\u308c\u3092Squeryl\u3092\u4f7f\u3063\u3066\u5b9f\u73fe\u3057\u305f\u3044\u3002<\/p>\n

SELECT p.*, (p.latlng <-> POINT(36.726637,139.526557)) * 111000 as l\r\nFROM place p\r\nWHERE (p.latlng <-> POINT(36.726637,139.526557)) < 3000.0 \/ 111000.0\r\nORDER BY p.latlng <-> POINT(36.726637,139.526557)\r\nLIMIT 30<\/pre>\n
<\/h2>\n
Squeryl\u3067\u306e\u5b9a\u7fa9<\/h2>\n
\u5148\u306b\u7d50\u8ad6\u304b\u3089\u66f8\u3044\u3066\u304a\u304f\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3057\u305f\u3002\u3082\u3063\u3068\u3044\u3044\u65b9\u6cd5\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3002\u7279\u306b\u3001StringExpression \u3092\u53d7\u3051\u53d6\u308b\u6240\u304c\u30a4\u30de\u30a4\u30c1\u306a\u6c17\u304c\u3059\u308b\u3002<\/p>\n
  def distance(col1: StringExpression[String], col2: StringExpression[String])\r\n  = new FunctionNode[Double](\"distance\", None, Seq(col1, col2)) with NumericalExpression[Double] {\r\n    override def doWrite(sw: StatementWriter) = {\r\n      col1.write(sw)\r\n      sw.write(\" <-> \")\r\n      col2.write(sw)\r\n    }\r\n  }<\/pre>\n
\u4f7f\u3044\u65b9<\/h2>\n
\u4e0a\u3067\u5b9a\u7fa9\u3057\u305fdistance\u95a2\u6570\u3092\u3069\u306e\u3088\u3046\u306b\u4f7f\u3046\u304b\u306b\u3064\u3044\u3066\u3001\u4ee5\u4e0b\u306b\u8ff0\u3079\u308b\u3002<\/p>\n
point\u578b\u3092\u542b\u3080\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3057\u305f\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9<\/h3>\n
\u30af\u30e9\u30b9\u5b9a\u7fa9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002\u30dd\u30a4\u30f3\u30c8\u306fPostgreSQL\u306epoint\u578b\u306e\u30ab\u30e9\u30e0(latlng)\u306fString\u578b\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u5024\u3092\u53d7\u3051\u53d6\u308a\u3001\u305d\u308c\u3092\u81ea\u4f5c\u306ePoint\u30af\u30e9\u30b9\uff08\u5f8c\u8ff0\uff09\u306b\u6e21\u3057\u3066\u4f7f\u7528\u3059\u308b\u3002<\/p>\n
class Place (\r\n  val id: Int = 0,\r\n\r\n  @Column(\"latlng\")\r\n  val rawLatLng: String\r\n) {\r\n  def this() = {\r\n    this(0, \"\")\r\n  }\r\n\r\n  def this(id: Int, latlng: Point) = {\r\n    this(id, latlng.toString)\r\n  }\r\n\r\n  def latlng: Point = {\r\n    Point(rawLatLng)\r\n  }\r\n}<\/pre>\n
\u30af\u30a8\u30ea\u30fc\u306e\u7d44\u307f\u7acb\u3066<\/h3>\n
\u5148\u307b\u3069\u4f5c\u3063\u305f”distance”\u95a2\u6570\u3092\u4f7f\u3063\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u308b\u3002\u30dd\u30a4\u30f3\u30c8\u306f\u3001distance\u95a2\u6570\u306b\u306fString\u3092\u6e21\u3059\u3053\u3068\u3002<\/p>\n
    from(places)(p =>\r\n        select(p)\r\n        where(distance(p.rawLatLng, Point(lat, lng).toString) < (3000.0 \/ 111000.0))\r\n        orderBy(distance(p.rawLatLng, Point(lat, lng).toString))<\/pre>\n
Point\u30af\u30e9\u30b9\uff1f<\/h3>\n
\u4e0a\u306e\u307b\u3046\u3067\u51fa\u305f\u3001Point\u30af\u30e9\u30b9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3057\u305f\u3002<\/p>\n
case class Point (\r\n  val lat: Double,\r\n  val lng: Double\r\n) {\r\n  override def toString = {\r\n    \"(%f,%f)\".format(lat, lng)\r\n  }\r\n}\r\n\r\nobject Point {\r\n  def apply(s: String): Point = {\r\n    parseStr(s)\r\n  }\r\n\r\n  private def parseStr(pointStr: String): Point = {\r\n    \/\/ \u7701\u7565\r\n  }\r\n}<\/pre>\n
\u5c11\u3057Squeryl\u306e\u30bd\u30fc\u30b9\u3082\u898b\u3066\u307f\u308b<\/h2>\n
distance\u30e1\u30bd\u30c3\u30c9\u306f\u3001Squeryl\u306eFunctionNode\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u304c\u3001FunctionNode\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30b7\u30b0\u30cb\u30c1\u30e3\u30fc\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002\u3053\u308c\u3068\u5148\u307b\u3069\u306edistance\u95a2\u6570\u3092\u898b\u6bd4\u3079\u3066\u307f\u308c\u3070\u610f\u5473\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u304b\u3082\u3002<\/p>\n
class FunctionNode[A](val name: String, _mapper : Option[OutMapper[A]], val args: Iterable[ExpressionNode]) extends ExpressionNode {<\/pre>\n
\u307e\u305f\u3001distance\u95a2\u6570\u306fNumericalExpression trait\u3092mix-in\u3057\u3066\u3044\u308b\u3002\u305d\u308c\u306b\u3088\u308a\u3001\u7d50\u679c\u304cdouble\u578b\u3067\u8fd4\u3055\u308c\u308b\u3002<\/p>\n
\u307e\u3068\u3081<\/h2>\n
Squeryl\u304c\u76f4\u63a5\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044RDBMS\u306e\u95a2\u6570\uff08\u4eca\u56de\u306f<->\uff09\u3067\u3082\u3001\u81ea\u5206\u3067\u5c11\u3057\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u3070Squeryl\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n
\u3053\u306e\u8fba\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306f\u3042\u307e\u308a\u306a\u3044\u306e\u3067\u3001\u30bd\u30fc\u30b9\u3092\u898b\u308b\u306e\u304c\u4e00\u756a\u65e9\u3044\u304b\u3082\u3002<\/p>\n
\u30e1\u30e2\uff1a \u3053\u306e\u30b9\u30e9\u30a4\u30c9\uff08\uff1f\uff09<\/a>\u3082\u5c11\u3057\u53c2\u8003\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4ee5\u524d\u5225\u30d6\u30ed\u30b0\u3067\u3001Squeryl\u3067\u6700\u521d\u304b\u3089\u306f\u7528\u610f\u3055\u308c\u3066\u3044\u306a\u3044\u96c6\u8a08\u95a2\u6570\uff08median\uff09\u3092\u5b9f\u88c5\u3059\u308b\u3001\u3068\u3044\u3046\u30a8\u30f3\u30c8\u30ea\u3092\u66f8\u3044\u305f\u3002\u4eca\u56de\u306f\u305d\u308c\u3068\u4f3c\u305f\u5185\u5bb9\u3067\u3001PostgreSQL\u306e\u4f4d\u7f6e\u60c5\u5831\u306e\u95a2\u6570\u3092Squeryl\u3067\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u308b\u3002 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[20],"tags":[923,905],"class_list":["post-1361","post","type-post","status-publish","format-standard","hentry","category-scala","tag-postgresql","tag-squeryl"],"_links":{"self":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/1361","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/comments?post=1361"}],"version-history":[{"count":3,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/1361\/revisions"}],"predecessor-version":[{"id":1365,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/posts\/1361\/revisions\/1365"}],"wp:attachment":[{"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/media?parent=1361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/categories?post=1361"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kazu.tv\/blog\/wp-json\/wp\/v2\/tags?post=1361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}