我想基于地理位置与本地查询来获取表项,使用MariaDB的10.0.36(与InnoDB引擎)和Spring数据。
这里是我的方法签名:
@Query(value = "SELECT j "
+ "FROM Car j "
+ "WHERE distance(j.localization.point, POINT((?2), (?3))) AS sdistance < 10 "
+ "AND (j.name LIKE %?1% "
+ "OR j.carCategory.name LIKE %?1% "
+ "OR j.description LIKE %?1%) "
+ "ORDER BY sdistance "
+ "LIMIT 25", nativeQuery = true)
List<Car> getNearestCars(String text, double lat, double lon);
这里是我的本地化实体:
@Entity
@Table(name = "localizations")
public class Localization {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@OneToOne(fetch = FetchType.LAZY)
private User assossiatedUser;
private String zipCode;
private String state;
@Column(length=200)
private String city;
@Column(length=200)
private String number;
@Column(length=200)
private String neighbourhood;
@Column(length=16)
private String publicPlaceType;
@Column(length=200)
private String publicPlace;
@Column(length=200)
private String complement;
private double coordX;
private double coordY;
@Column(columnDefinition = "POINT")
private Point point;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public User getAssossiatedUser() {
return assossiatedUser;
}
public void setAssossiatedUser(User assossiatedUser) {
this.assossiatedUser = assossiatedUser;
}
public String getZipCode() {
return zipCode;
}
public void setZipCode(String zipCode) {
this.zipCode = zipCode;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getComplement() {
return complement;
}
public void setComplement(String complement) {
this.complement = complement;
}
public double getCoordX() {
return coordX;
}
public void setCoordX(double coordX) {
this.coordX = coordX;
}
public double getCoordY() {
return coordY;
}
public void setCoordY(double coordY) {
this.coordY = coordY;
}
public String getNeighbourhood() {
return neighbourhood;
}
public void setNeighbourhood(String neighbourhood) {
this.neighbourhood = neighbourhood;
}
public String getPublicPlaceType() {
return publicPlaceType;
}
public void setPublicPlaceType(String publicPlaceType) {
this.publicPlaceType = publicPlaceType;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
public String getPublicPlace() {
return publicPlace;
}
public void setPublicPlace(String publicPlace) {
this.publicPlace = publicPlace;
}
public Point getPoint() {
return point;
}
public void setPoint(Point point) {
this.point = point;
}
}
我创建具有以下(发现在指令的功能距离https://www.scribd.com/presentation/2569355/Geo-Distance-Search-with-MySQL):
DELIMITER $$
CREATE FUNCTION `distance`(a POINT, b POINT) RETURNS double DETERMINISTIC
BEGIN
DECLARE d double;
SET d = round(glength(linestringfromwkb(linestring(asbinary(a),asbinary(b)))));
RETURN d;
END $$
DELIMITER ;
这里是application.yml:
server.port: 8080
server.context-path: /api
enter code here
spring:
datasource:
url: jdbc:mariadb://localhost:3306/databasename
driverClassName: org.mariadb.jdbc.Driver
username: root
password: root
jpa:
hibernate:
ddl-auto: create
dialect: org.hibernate.dialect.MySQL5InnoDBDialect
hbm2ddl.auto: update
show_sql: false
logging:
level:
org.springframework: ERROR
当我访问方法getNearestJobs,我得到的错误如下:
org.mariadb.jdbc.internal.util.dao.QueryException:您的SQL语法错误; 查手册对应于您MariaDB的服务器版本正确的语法使用近“AS sdistance <10 AND(j.name LIKE‘%eteste10%’或j.jobCategory.name LIKE‘%ETE’位于第1行的查询是: SELECTĴFROM工作j,其中距离(j.localization.point,要点((?),(?)))AS sdistance <10 AND(j.name LIKE 2 OR j.jobCategory.name LIKE 2 OR j.description LIKE? )ORDER BY sdistance LIMIT 25,参数[-5.1797161,-40.6646966, '%eteste10%', '%eteste10%', '%eteste10%']
我究竟做错了什么?
我懂了。有两个问题与SQL查询:首先,如果使用本地查询,你显然不能使用面向对象的抽象; 第二,应该sdistance SELECT子句代替WHERE / HAVING子句中被声明。
@Query(value = "SELECT *, distance(l.point, POINT((?2), (?3))) AS jdistance "
+ "FROM cars j, car_categories c, localizations l "
+ "WHERE (j.name LIKE %?1% "
+ "OR j.description LIKE %?1% "
+ "OR (j.car_category_id = c.id AND c.name LIKE %?1%)) "
+ "AND l.id = j.localization_id "
+ "HAVING jdistance < 10 "
+ "ORDER BY jdistance"
, nativeQuery = true)
List<Car> getNearestCars(String text, double lat, double lon);
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