JPA One to Many make may select queries
0
There are many select queries from JPA when using @ManyToMany
The relation is
Person 1 : Bank N, Bank 1 : Account N
This is my code:
@Entity
public class Person
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "person_id")
private List<Bank> banks;
@Entity
public class Bank
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "bank_id")
private List<Account> accounts;
@Entity
public class Account
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
and queries log is :
select ....
select ....
select ....
select ....
select ....
...
if number of rows on table including relation is increasing, number of query will increasing.
and performance is more lower... I want to resolve this increasing query problem.
How can I create one select query on JAP or less query?
sql spring jpa spring-data-jpa
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
add a comment |
0
There are many select queries from JPA when using @ManyToMany
The relation is
Person 1 : Bank N, Bank 1 : Account N
This is my code:
@Entity
public class Person
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "person_id")
private List<Bank> banks;
@Entity
public class Bank
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "bank_id")
private List<Account> accounts;
@Entity
public class Account
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
and queries log is :
select ....
select ....
select ....
select ....
select ....
...
if number of rows on table including relation is increasing, number of query will increasing.
and performance is more lower... I want to resolve this increasing query problem.
How can I create one select query on JAP or less query?
sql spring jpa spring-data-jpa
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
Possible duplicate of What is the solution for the N+1 issue in JPA and Hibernate?
– Jens Schauder
Nov 15 '18 at 6:41
add a comment |
0
0
0
There are many select queries from JPA when using @ManyToMany
The relation is
Person 1 : Bank N, Bank 1 : Account N
This is my code:
@Entity
public class Person
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "person_id")
private List<Bank> banks;
@Entity
public class Bank
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "bank_id")
private List<Account> accounts;
@Entity
public class Account
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
and queries log is :
select ....
select ....
select ....
select ....
select ....
...
if number of rows on table including relation is increasing, number of query will increasing.
and performance is more lower... I want to resolve this increasing query problem.
How can I create one select query on JAP or less query?
sql spring jpa spring-data-jpa
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
There are many select queries from JPA when using @ManyToMany
The relation is
Person 1 : Bank N, Bank 1 : Account N
This is my code:
@Entity
public class Person
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "person_id")
private List<Bank> banks;
@Entity
public class Bank
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "bank_id")
private List<Account> accounts;
@Entity
public class Account
@Id
@Column(unique = true, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
and queries log is :
select ....
select ....
select ....
select ....
select ....
...
if number of rows on table including relation is increasing, number of query will increasing.
and performance is more lower... I want to resolve this increasing query problem.
How can I create one select query on JAP or less query?
sql spring jpa spring-data-jpa
sql spring jpa spring-data-jpa
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
edited Nov 15 '18 at 6:05
marc_s
583k13011241270
583k13011241270
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
asked Nov 15 '18 at 4:50
jaeuk Shinjaeuk Shin
2218
2218
Possible duplicate of What is the solution for the N+1 issue in JPA and Hibernate?
– Jens Schauder
Nov 15 '18 at 6:41
add a comment |
Possible duplicate of What is the solution for the N+1 issue in JPA and Hibernate?
– Jens Schauder
Nov 15 '18 at 6:41
Possible duplicate of What is the solution for the N+1 issue in JPA and Hibernate?
– Jens Schauder
Nov 15 '18 at 6:41
Possible duplicate of What is the solution for the N+1 issue in JPA and Hibernate?
– Jens Schauder
Nov 15 '18 at 6:41
add a comment |
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Possible duplicate of What is the solution for the N+1 issue in JPA and Hibernate?
– Jens Schauder
Nov 15 '18 at 6:41