In my code I call stored procedure like this (and it works perfectly):
{ ? = call schema.package.function(?) }
I need to call it like this because jdbc connection is set to another schema.
But for now I can't test it because H2 database doesn't support packages. So if I change my jdbc url database name to the one I require and delete "schema" from the call everything is ok while testing.
#Test
fun test() {
val session = em.entityManager.unwrap(Session::class.java)
session.doWork {
val st = it.createStatement()
st.execute("create schema if not exists mySchema")
st.execute("create alias mySchema.myPackage.myFunction for " // the error happens here +
"\"${this.javaClass.name}.myFunction\"")
}
val response = dao.myFunction("1")
//test stuff
}
How can I change my test because now it's giving me the syntax error?
Related
thanks reading this question.
I created simple kotlin project and I want to learn kotlin exposed.
I use H2 database.
I wrote code like below.
package learn.exposed.tables
import org.jetbrains.exposed.sql.Table
object AuthorTable : Table("author") {
val name = varchar("name", 30)
}
fun main() {
// this url based on http://www.h2database.com/html/features.html#execute_sql_on_connection
val url = "jdbc:h2:mem:test;INIT=runscript from 'classpath:/create.sql'\\;runscript from 'classpath:/init.sql'"
Database.connect(url, driver = "org.h2.Driver", user = "root", password = "")
transaction {
AuthorTable.insert {
it[name] = "hoge"
}
println("insert done.") // this message can show on console. I think Insert is successfull.
}
transaction {
AuthorTable.selectAll().firstOrNull()
}
}
and sql files below.
create table author (name varchar(30));
insert into author values ('author1');
When execute main(), console showing insert done.. in short, I think insert is doing well, but when execute AuthorTable.selectAll().firstOrNull(), happend Exception like below,
Exception in thread "main" org.jetbrains.exposed.exceptions.ExposedSQLException: org.h2.jdbc.JdbcSQLNonTransientException: 一般エラー: "java.lang.NullPointerException"
General error: "java.lang.NullPointerException" [50000-200]
SQL: [Failed on expanding args for SELECT: org.jetbrains.exposed.sql.Query#27406a17]
at org.jetbrains.exposed.sql.statements.Statement.executeIn$exposed_core(Statement.kt:62)
at org.jetbrains.exposed.sql.Transaction.exec(Transaction.kt:135)
at org.jetbrains.exposed.sql.Transaction.exec(Transaction.kt:121)
at org.jetbrains.exposed.sql.AbstractQuery.iterator(AbstractQuery.kt:65)
at kotlin.collections.CollectionsKt___CollectionsKt.firstOrNull(_Collections.kt:267)
at learn.exposed.MainKt$main$2.invoke(Main.kt:22)
at learn.exposed.MainKt$main$2.invoke(Main.kt)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.inTopLevelTransaction$run(ThreadLocalTransactionManager.kt:179)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.access$inTopLevelTransaction$run(ThreadLocalTransactionManager.kt:1)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt$inTopLevelTransaction$1.invoke(ThreadLocalTransactionManager.kt:205)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.keepAndRestoreTransactionRefAfterRun(ThreadLocalTransactionManager.kt:213)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.inTopLevelTransaction(ThreadLocalTransactionManager.kt:204)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt$transaction$1.invoke(ThreadLocalTransactionManager.kt:156)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.keepAndRestoreTransactionRefAfterRun(ThreadLocalTransactionManager.kt:213)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.transaction(ThreadLocalTransactionManager.kt:126)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.transaction(ThreadLocalTransactionManager.kt:123)
at org.jetbrains.exposed.sql.transactions.ThreadLocalTransactionManagerKt.transaction$default(ThreadLocalTransactionManager.kt:122)
at learn.exposed.MainKt.main(Main.kt:21)
at learn.exposed.MainKt.main(Main.kt)
can I solve this? do you know something how to solve this?
thanks.
Seems like you need at least one Primary Key(PK) or Constraint because of H2 bug.
https://github.com/h2database/h2database/issues/2191
https://github.com/JetBrains/Exposed/issues/801
I'm quite new to Spring MVC, and I'm having problems getting a simple entity update to work.
My data class looks like this...
#Entity
#Table(uniqueConstraints=[UniqueConstraint(columnNames=["name_search"])])
data class ArticleType(
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
val id: Long? = null,
val name : String = "",
val order: Int? = null,
var name_search : String = ""
)
The repository looks like so...
interface ArticleTypeRepository : JpaRepository<ArticleType, Long> {
fun findFirstById(id: Long) : ArticleType?
fun findAllByOrderByOrderAsc(): List<ArticleType>
fun findByName(name: String): ArticleType?
}
I'm trying to update the name_search column like so...
val article_type:ArticleType? = articleTypeRepository.findFirstById(1234)
if (article_type !== null) {
article_type.name_search = "abc"
articleTypeRepository.save(article_type)
}
This results in the following error...
java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order=99 where id=1234' at line 1
I'm assuming this means the binding isn't working correctly, and it's missing the "name_search" binding, or missing the quotes or something. I've turned on logging, and I can see the following...
org.hibernate.SQL : update article_type set name=?, name_search=?, order=? where id=?
Then it lists the binding parameters "o.h.type.descriptor.sql.BasicBinder", which all appear to be correct.
I'm not sure what's going wrong, or where I need to start to try to fix it.
This is a legacy system I've inherited, and I don't fully understand it. If there is some extra information I need to provide here, please let me know.
I tryed to fix a problem with encodings. So, I sent from 'Postman', from web browser request to server, where I search data in database by keys in request. Request can be like this:
http://localhost:8080/books.getBooksByGenre/Документальное/0/10
(in browser).
Server receive string, like
http://localhost:8080/books.getBooksByGenre/%D0%94%D0%BE%D0%BA%D1%83%D0%BC%D0%B5%D0%BD%D1%82%D0%B0%D0%BB%D1%8C%D0%BD%D0%BE%D0%B5/0/10
then, takes params from url:
genreName: 'Документальное'
start: 0
count: 10.
Then, this data sends to dao:
override fun findGenreByName(genreName: String): DatabaseGenre {
return transaction(db) { getGenreByName(genreName) }
}
private fun getGenreByName(genreName: String): DatabaseGenre {
return try {
val foundGenre = GenreEntity.find { Genres.genre eq genreName }.single()
DatabaseGenre(foundGenre.id.value, foundGenre.genre, foundGenre.link)
} catch (e: Exception) {
throw NothingFoundInDatabaseException("no one genre found by '$genreName'")
} catch (e: NoSuchElementException) {
val m = "Duplicates of genre with name '$genreName'"
throw DuplicatedDataInDatabaseException(m)
}
}
In log I see, that sql-query for finding genres is correct, but I receive an exception:
java.util.NoSuchElementException: Collection is empty.
The sql-query, as I said, is correct:
SELECT genres.id, genres.genre, genres.link FROM genres WHERE genres.genre = 'Документальное'
Structure of genres table:
genres
id: int(10)
genre: varchar(100)
link: varchar(100
I tryied, to select all genres, and this query executed almost correctly. So, I decided, to check this query with english word, and this query correctly executed:
SELECT genres.id, genres.genre, genres.link FROM genres WHERE genres.genre = 'simpleGenre'
I have not exceptions with this query.
So, what I've done wrong and how to fix problem with collations?
UPD:
As I said at github (issue), I've tryied this query it mysql cli and I receive correct answer.
Also, I've tryed to decode url params (with java URLDecoder class). It doesn't helps too.
Thanks, #madhead.
I tryied an advance of #madhead, and it works. So, from this time my DB connection URL looks like this:
val connect = Database.connect(
url = "jdbc:mysql://localhost:3306/my_database_name?characterEncoding=utf8&useUnicode=true",
driver = "com.mysql.jdbc.Driver",
user = user_name,
password = password
)
For my application I need dynamic database connections at runtime.
I know, there are ways to create multiple datasources but they are not that dynamically I think.
Scenario:
A user can enter database credentials and connect to a remote database to import single rows and tables to an other database. For this purpose I need to connect to the remote database dynamically.
I've tried to do that in a service like they've said in If I use groovy sql class in grails, does it use the grails connection pooling?
Note: GORM is dispensable in this case, I can use plain SQL instead.
Any ideas? Thank you..
Edit: Grails 2.3.4
You can do this sort of thing to register DataSource beans at runtime:
Given a Grails Service:
package whatever
import groovy.sql.Sql
import org.springframework.context.*
import org.apache.tomcat.jdbc.pool.DataSource
import org.springframework.context.support.GenericApplicationContext
class DataSourceService implements ApplicationContextAware {
ApplicationContext applicationContext
def registerBean( String beanName, String dsurl, String uid, String pwd ) {
if( !applicationContext.containsBean( beanName ) ) {
def bb = new grails.spring.BeanBuilder()
bb.beans {
"$beanName"( DataSource ) {
driverClassName = "com.mysql.jdbc.Driver"
url = dsurl
username = uid
password = pwd
validationQuery = "SELECT 1"
testOnBorrow = true
maxActive = 1
maxIdle = 1
minIdle = 1
initialSize = 1
}
}
bb.registerBeans( applicationContext )
log.info "Added $beanName"
}
else {
log.error "Already got a bean called $beanName"
}
}
def deRegisterBean( String beanName ) {
if( applicationContext.containsBean( beanName ) ) {
(applicationContext as GenericApplicationContext).removeBeanDefinition( beanName )
log.info "Removed $beanName"
}
else {
log.error "Trying to deRegister a bean $beanName that I don't know about"
}
}
def getSql( String beanName ) {
Sql.newInstance( applicationContext.getBean( beanName ) )
}
}
Then, you should be able to call the service to register a new datasource:
dataSourceService.registerBean( 'myDS', 'jdbc:mysql://localhost:3306/mysql', 'test', 'test' )
Get a Groovy Sql object for it:
dataSourceService.getSql( 'myDS' ).rows( 'SELECT * FROM whatever' )
And remove the bean when done
dataSourceService.deRegisterBean( 'myDS' )
Fingers crossed... I've yanked that code from a project of mine and changed/not-tested it ;-)
Update
The runtime-datasources plugin has been created which uses the approach outlined in this post to allow datasources to be added/removed at runtime.
As long as you have the JDBC drivers for all the datasources on your classpath, you can create an instance of groovy.sql.Sql that will connect to whatever database you like, e.g.
Sql sql = Sql.newInstance('jdbc:hsqldb:mem:testDB', 'sa', 'myPassword',
'org.hsqldb.jdbc.JDBCDriver')
// now use the Sql instance to execute a query, or whatever....
Sorry for my English first of all. I have a problem and need help.
I have a simple tool made by myself on c#. This tool makes connect to local or remote firebird server (v.2.5). And my tool can create specified .fdb file (database) somewhere on the server.
Also I have a file with SQL statements (create table, triggers and so on). I want to execute this file after database was created. Executing this file will fill structure of user database - not data, only structure.
But then I try to execute my SQL script - firebird server returns a
SQL error code = -104 Token unknown line xxx column xxx.
That's the line on this CREATE TABLE SQL statement, for example:
CREATE TABLE tb1
(
col1 INTEGER NOT NULL,
col2 VARCHAR(36)
);
/* This next create statement causes an error */
CREATE TABLE tb2
(
col1 INTEGER NOT NULL,
col2 VARCHAR(36)
);
If I will leave only one create statement in my file - all will be good... I don't know how I explained (it's clear or not)) - another words - why can't I execute full query with many create statements in one transaction? There is my main method which executes query:
public static string Do(string conString, string query)
{
using (FbConnection conn = new FbConnection())
{
try
{
conn.ConnectionString = conString;
conn.Open();
FbTransaction trans = conn.BeginTransaction();
FbCommand cmd = new FbCommand(query, conn, trans);
cmd.ExecuteNonQuery();
trans.Commit();
}
catch (Exception ex)
{
System.Windows.MessageBox.Show(ex.ToString());
return "Transaction Fail";
}
}
return "Transaction Commited";
}
There is a query is my SQL file.
As Victor already stated in his final comment, you can use the FBScript class for batch execution.
I was just confronted with the same task. This question pointed me in the right direction but i had to do some further digging.
I this example, the source of the statements is a external script file:
private void ExecuteScript(FbConnection myConnection, string scriptPath) {
if (!File.Exists(scriptPath))
throw new FileNotFoundException("Script not found", scriptPath);
FileInfo file = new FileInfo(scriptPath);
string script = file.OpenText().ReadToEnd();
// use FbScript to parse all statements
FbScript fbs = new FbScript(script);
fbs.Parse();
// execute all statements
FbBatchExecution fbe = new FbBatchExecution(myConnection, fbs);
fbe.Execute(true);
}
This will work fine, but you may wonder why this whole thing isn't surrounded by a transaction. Actually there is no support to "bind" FbBatchExecution to a transaction directly.
The first thing i tried was this (will not work)
private void ExecuteScript(FbConnection myConnection, string scriptPath) {
using (FbTransaction myTransaction = myConnection.BeginTransaction()) {
if (!File.Exists(scriptPath))
throw new FileNotFoundException("Script not found", scriptPath);
FileInfo file = new FileInfo(scriptPath);
string script = file.OpenText().ReadToEnd();
// use FbScript to parse all statements
FbScript fbs = new FbScript(script);
fbs.Parse();
// execute all statements
FbBatchExecution fbe = new FbBatchExecution(myConnection, fbs);
fbe.Execute(true);
myTransaction.Commit();
}
}
This will result in an exception stating: "Execute requires the Command object to have a Transaction object when the Connection object assigned to the command is in a pending local transaction. The Transaction property of the Command has not been initialized."
This means nothing more than that the commands that are executed by FbBatchExecution are not assigned to our local transaction that is surrounding the code block. What helps here is that that FbBatchExecution provides
the event CommandExecuting where we can intercept every command and assign our local transaction like this:
private void ExecuteScript(FbConnection myConnection, string scriptPath) {
using (FbTransaction myTransaction = myConnection.BeginTransaction()) {
if (!File.Exists(scriptPath))
throw new FileNotFoundException("Script not found", scriptPath);
FileInfo file = new FileInfo(scriptPath);
string script = file.OpenText().ReadToEnd();
// use FbScript to parse all statements
FbScript fbs = new FbScript(script);
fbs.Parse();
// execute all statements
FbBatchExecution fbe = new FbBatchExecution(myConnection, fbs);
fbe.CommandExecuting += delegate(object sender, CommandExecutingEventArgs args) {
args.SqlCommand.Transaction = myTransaction;
};
fbe.Execute(true);
// myTransaction.Commit();
}
}
Note that i have uncommented the myTransaction.Commit() line. I was a little bit surprised by this behavior, but if you keep that line the transaction will throw an exception stating that it has already been committed. The bool parameter fbe.Execute(true) is named "autoCommit", but changing this to false seems to have no effect.
I would like some feedback if you see any potential issues with assigning the local transaction this way, or if it has any benefits at all or could as well be omitted.
Probably error in launching two create statements in one batch. Would it work if you break it to separate queries? Does it work in your SQL tool?