How to call mysql stored procedure with dynamic name in grails - grails

Question

I have requirement like to call the stored procedures to get the data, here i will get the stored procedure name through post data.
I tried using GString but no use, Can any one help me to solve this issue.
Thanks in advance.

Answer 1

This is a weird one, but possible. Grails/GORM doesn't provide a way to execute stored procedures. It's just not part of ORM functionality. And neither does Hibernate. But, Hibernate does provide access to a JDBC connection. So you can get a connection from Hibernate, then create a Groovy Sql instance with the connection, and finally execute your stored procedure. Here's an example:
import groovy.sql.Sql
SomeDomainClass.withNewSession { session ->
session.doWork { java.sql.Connection connection ->
def sql = new Sql(connection)
sql.call("YOUR STORED PROCEDURE SQL HERE")
}
}
It works like this:
Using any of your domain classes, call withSession(Closure) to get a Hibernate session.
With the session, call doWork(Work) to get access to the session's JDBC connection. Now, doWork(Work) expects an implementation of org.hibernate.jdbc.Work. But, if I recall correctly, Groovy can take a closure with the same parameters and coerce it to implement the interface.
Using the connection, create an instance of Sql. You could skip this and query with Java, but Groovy's Sql class is so nice.
Use one of the available Sql.call() methods to execute your stored procedure.

Answer 2

In postgress SQL, it is posible to call stored procedure. The catch is returning a data table so that you can map it to a model. This is as shown bellow.
create function activate(confirmationcode text)
returns TABLE(resultid integer, resultmessage character varying)
language plpgsql
as $$
BEGIN
....
END
This can be invoked as follows in GORM db connections
type FuncResult struct {
Resultid int
Resultmessage string
}
...
fResult := FuncResult{}
err := s.db.Raw("SELECT * from activate(?)", token).Scan(&fResult).Error