mybatis-user Google Group

Re: How to make resultMap and select, update, delete, insert queries reusable for multiple xml mappers?

mnesa...@gmail.com (Frank Martínez) — Sat, 25 May 2013 17:31:08 UT

Hi,

In the case of SQL, you can define the sql tag in any mapper file and then
include it in any other mapper file using a fully qualified name (
namespace.id)

*<include refid="namespace.sqlid" />*

In the case of ResultMap, you can't use include tag, but you can use the
extends attribute to inherit from any other resulmap.

Re: How to make resultMap and select, update, delete, insert queries reusable for multiple xml mappers?

volodial1...@mail.ru (volodiaL) — Sat, 25 May 2013 16:57:33 UT

Thank you very much for reply!

I know that there is sql tag! But I don't know how to write it once in one
file and include it (reuse) in multiple xml mappers.
The same is with resultMap tag. Can I reuse fragments of resultMap tag in
multiple xml mappers?.

Re: How to make resultMap and select, update, delete, insert queries reusable for multiple xml mappers?

mnesa...@gmail.com (Frank Martínez) — Sat, 25 May 2013 16:50:28 UT

Hi,

You can use sql fragments:
[link]

Frank.

--
Frank D. Martínez M.

How to make resultMap and select, update, delete, insert queries reusable for multiple xml mappers?

volodial1...@mail.ru (volodiaL) — Sat, 25 May 2013 16:34:37 UT

Hello!
I have very similar sql queries for several domain objects. There is a
problem they are spread among several mybatis mappers;
For example:
*<insert id="save" parameterType="JuniorUser">*
* INSERT INTO USER ... VALUES .... ;*
*</insert>*
And
*<insert id="save" parameterType="ExpertUser">*
* INSERT INTO USER ... VALUES .... ;*

Re: how to map mybatis Composite Key with a jpa's @Embeddable annotation object

guy.rouill...@gmail.com (Guy Rouillier) — Sat, 25 May 2013 00:41:25 UT

What problem are you having? The solution to this seems
straightforward. Your table has 3 columns, correct:

ID1 integer
ID2 integer
STARTTIME varchar

Your ResultMap might look something like this (leaving out formatting):

resultMap type="Issue"
result column="STARTTIME" property="startTime"

Re: Question about MyBatis external dependencies

eduardo.macar...@gmail.com (Eduardo Macarron) — Fri, 24 May 2013 04:29:56 UT

3.2 can use Javassist instead of CGLIB. But, as Jeff pointed, if you are
using lazy load you need at least one of them.

Re: Configuring databaseId provider with Guice?

eduardo.macar...@gmail.com (Eduardo Macarron) — Fri, 24 May 2013 04:28:42 UT

This is something we should improve.

We have moved the code and the tracker to Github, but still use gcode for
downloads, wiki and project page.

The path to get to the docs is:
[link] -> blog.mybatis.org -> google code project -> guice docs

IMHO Github wont work as a project main page. It is too code centric. We

how to map mybatis Composite Key with a jpa's @Embeddable annotation object

zjwsu...@gmail.com (Saren SR) — Fri, 24 May 2013 03:30:48 UT

the class is as follows,created by hibernate inverse.however when i want to
use this class to map the table Issue by mybatis ,there seem like no
solution in the web,can anyone help me? i will be very appreciated.
public class Issue {
private IssueId id;
private String startTime;
.............
@Embeddable

Re: Configuring databaseId provider with Guice?

br...@pontarelli.com (Brian Pontarelli) — Thu, 23 May 2013 19:59:05 UT

That explains why I couldn't find it. The MyBatis documentation has moved around quite a bit and it is hard to figure out where everything is. In fact, I don't think there is a link to the Guice documentation anywhere on the blog or the Github site. Oh and BTW, the Github site is currently down (404):

Re: Configuring databaseId provider with Guice?

jeffgbut...@gmail.com (Jeff Butler) — Thu, 23 May 2013 19:24:21 UT

Look at the bottom of this page to see how to do Guice with XML
configuration:

[link]

You should be able to set the database provider through the XML config. It
hasn't been exposed as a Guice property yet.

Jeff Butler

Configuring databaseId provider with Guice?

br...@pontarelli.com (Brian Pontarelli) — Thu, 23 May 2013 18:47:21 UT

I can't seem to figure out a way to configure the databseId provider via the MyBatis Guice extension. It also looks like I can't mix Guice with XML configuration. Anyone know how to do this?

Thanks,
-- Brian

Re: How to send multiple parameters to in many=@Many(select) nested select call?

viren.cha...@gmail.com (Viren Chande) — Thu, 23 May 2013 15:46:13 UT

Many thanks Iwao for your reply. It does help to know that multiple
parameters can be passed in a manner you explained. But I was looking to
pass the original parameter from 'getEmployee' method to the nested select.

Also, I appreciate that you confirmed the fact that original parameter
object cant be passed to the nested select.

Re: Question about MyBatis external dependencies

jeffgbut...@gmail.com (Jeff Butler) — Thu, 23 May 2013 13:44:56 UT

There was some discussion of replacing cglib with javassist. I can't
remember what happened with that effort.

Neither of these are required and are only used with lazy loading is
enabled - which usually offers very little actual benefit and should never
be enabled "just because it sounds cool". MyBatis works very well with no

Question about MyBatis external dependencies

fschietteca...@gmail.com (François Schiettecatte) — Thu, 23 May 2013 12:43:54 UT

I am currently using mybatis 3.2.2 and doing some code cleanup as well as thinking ahead.

I think I read on this mailing list that asm-3.3.1.jar and cglib-2.2.2.jar were going be to dropped as dependencies in future releases of mybatis, namely 3.2.3 onwards. I checked the archives but could not find any mention of this, am I dreaming this?

Re: How to send multiple parameters to in many=@Many(select) nested select call?

haraw...@gmail.com (Iwao AVE!) — Thu, 23 May 2013 00:37:23 UT

Hi,

There is no way to pass the original parameter object to the nested
select, but you can pass multiple parameters.
Assuming that GET_DEPTS needs two parameters 'employeeId' and
'country' and GET_EMPLOYEE returns ID and COUNTRY as its results:

@Select(GET_EMPLOYEE)
@Results(value = {
@Result(property="id", column="ID"),

Re: Resultset has more than 10000 records - Its not working

demablo...@gmail.com (Jose María Zaragoza) — Wed, 22 May 2013 15:44:28 UT

Hello:

You could try to execute the same query by using JDBC API , with the same
JDBC driver and the same URL connection and test from the same machine )

Yoy didn't tell anything about your DBMS , or your JDBC driver, or your
configuration

Regards

2013/5/17 Praneeth Reddy <pranith.reddy...@gmail.com>

Re: Resultset has more than 10000 records - Its not working

haraw...@gmail.com (Iwao AVE!) — Wed, 22 May 2013 15:39:30 UT

Hi,

Can you get all rows if you execute the query using plain JDBC (i.e.
without MyBatis) ?
Which version of database/driver do you use?

Regards,
Iwao

2013/5/17 Praneeth Reddy <pranith.reddy...@gmail.com>:

Integrate JPA, Mybatis,POJO service and REST Service in one project

jackey.zhang...@gmail.com — Wed, 22 May 2013 14:57:23 UT

My porject is based on Spring ,JPA(insert, update),Mybatis( mainly query),
POJO service and REST. I found a useful tool named BOS Designer at *
[link] <[link]>. It greatly simplify my
development and testing work. All of DAO,POJO and REST objects can be
designed visually and configuration files and source code is generated

Re: Collection and DB2

jiffy...@gmail.com (jj) — Tue, 21 May 2013 21:20:46 UT

It's when the id is a byte[]. I have tried many different configurations to
get the byte[] to work.

WORKING: When ID is _int;

CREATE TABLE A (
A_UUID decimal(19,0) NOT NULL
,USER_ID decimal(19,0) NOT NULL
,NAME varchar(50) NOT NULL
);
CREATE UNIQUE INDEX A_1 ON A (A_UUID);
ALTER TABLE A ADD CONSTRAINT PK_A PRIMARY KEY (A_UUID);

Resultset has more than 10000 records - Its not working

pranith.reddy...@gmail.com (Praneeth Reddy) — Thu, 16 May 2013 23:43:02 UT

Hi All,

I am facing some wierd issue , If the records are more than 10000 for below
mentioned query then its not processing futher after executing the query
but if it is less than 10000 its fetching the data from db ,returning to
implementation class.

Mapper.xml

Re: mybatis.org is now up

eduardo.macar...@gmail.com (Eduardo Macarron) — Thu, 16 May 2013 20:08:16 UT

Thank you both!!

2013/5/16 Clinton Begin <clinton.be...@gmail.com>:

mybatis.org is now up

clinton.be...@gmail.com (Clinton Begin) — Thu, 16 May 2013 19:46:00 UT

Hi all,

Thanks to Nathan Maves, the MyBatis.org site is back on its feet.

Depending on your ISP and DNS provider/servers, it may take up to two days
for you to see it. If you can manually flush your DNS cache in your OS and
network infrastructure, then that might speed up the process.

We only have a 1 hour TTL on the DNS records, but that doesn't mean

Re: Collection and List of Strings

prokajda...@gmail.com (David Prokaj) — Thu, 16 May 2013 19:23:34 UT

Thank you man!
I'm looking almost a day for this answer :)

2010. augusztus 16., hétfő 15:22:17 UTC+2 időpontban christia...@ircm.qc.ca
a következőt írta:

DTDs, mybatis.org downtime and you!

clinton.be...@gmail.com (Clinton Begin) — Thu, 16 May 2013 15:24:56 UT

Hi everyone,

On May 14th mybatis.org stopped responding to web requests. After some
investigation and working with GoDaddy, we've apparently broken their usage
policy for domain hosting due to excessive load against our DTDs. This was
a shared hosting arrangement and our usage threatened the QoS for other

Re: Why does BatchExecutor only remember one sql/statement

clinton.be...@gmail.com (Clinton Begin) — Thu, 16 May 2013 15:22:35 UT

It's a limitation of many (if not most) JDBC drivers. I can't recall if
Oracle is one of them or not, but this is code that must be compatible with
all drivers. The best solution is to try to order your writes such that
statements that are the same are batched together.

Cheers,
Clinton

Why does BatchExecutor only remember one sql/statement

daniel.gu...@gmail.com (dguggi) — Thu, 16 May 2013 10:50:44 UT

hi,
we ran into a max open cursor problem on oracle when doing batch inserts
(using two different statements) within one sqlsession/transaction.
the code did something like this:
for (int i=0; i < large-nuber; i++) {
batchMapper1.doInsert();
batchMapper2.doAnotherInsert() ;
it turned out that the problem is related with the BatchExecutor as it only

How to send multiple parameters to in many=@Many(select) nested select call?

viren.cha...@gmail.com (Micky) — Thu, 16 May 2013 04:46:54 UT

I have a scenario wherein I need to send parameter to many=@Many(select)
call. I am not sure how to do so.
@Select(GET_EMPLOYEE)
@Results(value = {
@Result(property="id", column="ID"),
@Result(property="dept", column="ID",
javaType=List.class, many=@Many(select="getDepts"))

Re: Manually created object in DAO for insert is not bound with mybatis, hence we can not call relationship methods on it if lazy loading is enabled.

jeffgbut...@gmail.com (Jeff Butler) — Wed, 15 May 2013 13:58:27 UT

If you fill out the associations with lazy loaded objects, you should
(hopefully) end up with nearly the same performance.

<myOpinionOnly>
I've been wondering if you have an application that has a very rich and
complex object model. It sounds like you do. As you're finding, MyBatis
is often not the best fit for persisting a complex object model directly.

Re: Manually created object in DAO for insert is not bound with mybatis, hence we can not call relationship methods on it if lazy loading is enabled.

paragdhik...@gmail.com (Parag Dhikale) — Wed, 15 May 2013 06:20:59 UT

It is not possible in our application to fill out associations after create
before returning object, as there are so many associations and are used at
many places.
Is there no other way in mybatis by which we can just bind this object with
mybatis mapper?

Re: Manually created object in DAO for insert is not bound with mybatis, hence we can not call relationship methods on it if lazy loading is enabled.

jeffgbut...@gmail.com (Jeff Butler) — Tue, 14 May 2013 16:30:48 UT

Why not fill out the associations after you do the create and then return
the complete object your client code expects?

If you are so committed to lazy loading that you must have it in all cases,
then your workaround is the only thing I can think of.

Jeff Butler

Re: Manually created object in DAO for insert is not bound with mybatis, hence we can not call relationship methods on it if lazy loading is enabled.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 15:32:20 UT

My mybatis config settings are as follows:
<settings>
<setting name="aggressiveLazyLoading" value="false" />
<setting name="lazyLoadingEnabled" value="true" />
<setting name="jdbcTypeForNull" value="VARCHAR" />
<setting name="defaultExecutorType" value="REUSE"/>
<setting name="defaultStatementTimeout" value="25000"/>

Manually created object in DAO for insert is not bound with mybatis, hence we can not call relationship methods on it if lazy loading is enabled.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 15:31:19 UT

Hi,
I am using mybatis 3.2.2.
In my application, to insert new row in the table, I have 'create' method
in DAO class of the object(POJO) which is for that table.
In that method I create POJO object using 'new' and set its properties
using setters with values got in create method parameters.
Then I pass that object(pojo) to the mapper interface's 'create' method

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 11:48:19 UT

I am still confused, if call is coming from elsewhere, then how come YJP is
showing that method being called from intercept() method?
I do not have any logging enabled in my settings for sure.

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

eduardo.macar...@gmail.com (Eduardo Macarron) — Tue, 14 May 2013 11:25:02 UT

In any case there is not any call to a jdbc api (PreparedStatement)
from that code so we can assume that call comes from elsewhere.

The docs about logs are online [link]

I would first check if log is enabled for any namespace.

2013/5/14 Parag Dhikale <paragdhik...@gmail.com>:

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 10:59:58 UT

Even I didn't find it being used anywhere.
But I have found a solution. By default logImpl uses SLF4J, whose log
method we could see in the profiler output taking time.
I tried changing logImpl. I set 'logImpl' property in <settings> as:
<setting name="logImpl" value="LOG4J"/>
And now I do not see that method in the profiller's stacktrace. Also

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

eduardo.macar...@gmail.com (Eduardo Macarron) — Tue, 14 May 2013 10:34:53 UT

Ah, sorry I thought that was an stacktrace. Sorry.

I cannot find any call to log in our code:
[link]

Do you have any hint?

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 10:24:10 UT

No, I don't think so. The statement you listed below is at the same level
as that of logger statement in stacktrace.
So, this oracle driver call and this logger statement call are at the same
level.

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

eduardo.macar...@gmail.com (Eduardo Macarron) — Tue, 14 May 2013 10:18:14 UT

Looks like that call comes from the oracle driver, does't it?

oracle.jdbc.driver.OraclePrepa redStatementWrapper.execute() 562 64

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 09:58:20 UT

Actually I am seeing this in the YJP (yourkit java prifiler) captured
snapshot. Even I am still trying to find out in the mybatis source code
where exactly it is being called from.
From YJP stacktrace, it is showing
"org.slf4j.impl.JDK14LoggerAda pter.log(Marker, String, int, String,
Object[], Throwable) 171 0 200" call exactly under

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 09:57:35 UT

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

eduardo.macar...@gmail.com (Eduardo Macarron) — Tue, 14 May 2013 09:47:03 UT

Can you get an stacktrace to know where is it being called from?

2013/5/14 Parag Dhikale <paragdhik...@gmail.com>:

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

paragdhik...@gmail.com (Parag Dhikale) — Tue, 14 May 2013 06:48:52 UT

Sorry, I forgot to mention that.
I am using mybatis 3.2.2.

Re: Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

eduardo.macar...@gmail.com (Eduardo Macarron) — Tue, 14 May 2013 04:25:52 UT

Which version are you using?

2013/5/13 Parag Dhikale <paragdhik...@gmail.com>:

Re: Connection is invalid -- how to check for this and get a valid connection

oconne...@yahoo.com (Chris) — Tue, 14 May 2013 03:01:07 UT

I have seen similar cases where a firewall between an app server and DB caused problems with connections getting closed. When you switched from using Tomcat to manage the pool, did you possibly upgrade a driver? Could you do a test where you just put a simple java program on the app server, outside of the context of the application server, that opens connections to the database and keeps them open for an extended period? It wouldn't have to do much, other than just execute some simple query at some interval that tries to mimic the application behavior you are seeing. It might be useful to know for sure that the issue with DB connections is repeatable outside the context of any pool (or not repeatable, which would tell you for sure that the problem is code related and not environment related).

RE: Connection is invalid -- how to check for this and get a valid connection

br...@fincalc.com (Brian Barnett) — Mon, 13 May 2013 19:21:42 UT

I'm not sure how I would check something like that. We do have a load
balancer between app and db servers, but it has not been a problem for us in
the past. We recently upgraded from an old, old version of MyBatis and in
the upgrade process, I wanted to use MyBatis connection pooling where before

Re: Connection is invalid -- how to check for this and get a valid connection

oconne...@yahoo.com (Chris) — Mon, 13 May 2013 19:04:53 UT

Have you confirmed that there isn't something else closing the connections on you? Perhaps a firewall residing between the app and database servers? Just a thought...
______________________________ __
From: Brian Barnett <br...@fincalc.com>
To: mybatis-user@googlegroups.com
Sent: Monday, May 13, 2013 1:53 PM

RE: Connection is invalid -- how to check for this and get a valid connection

br...@fincalc.com (Brian Barnett) — Mon, 13 May 2013 18:53:49 UT

Yes I am using Tomcat, but not necessarily for db connection pooling
functionality. I determined that the JDBC MyBatis connection pool as
configured below does not work. After a long period of time has elapsed
without db activity, I still get invalid connection errors.

Is there a MyBatis connection pool configuration that would fix this?

Re: Connection is invalid -- how to check for this and get a valid connection

guy.rouill...@gmail.com (Guy Rouillier) — Mon, 13 May 2013 18:13:05 UT

No, that is setting up a MyBatis pooled connection. You said you are
using Tomcat. In that case, you should be using a Tomcat-configured
Resource for your connection pool; that would type="JNDI". Then in
your Tomcat server.xml, you'd have one or more resources defined like this:

<Resource

Logger while each call of relationship (association/collection) method of mybatis pojo affecting performance.

paragdhik...@gmail.com (Parag Dhikale) — Mon, 13 May 2013 16:40:51 UT

Hi,
I have lazy loading set to true. Following is my configuration settings:
<settings>
<setting name="aggressiveLazyLoading" value="false" />
<setting name="lazyLoadingEnabled" value="true" />
<setting name="jdbcTypeForNull" value="VARCHAR" />
<setting name="defaultExecutorType" value="REUSE"/>

Re: Putting POJO returned from mybatis into HashTable degrades the performance as it tried to load the pojo in its hasCode method

paragdhik...@gmail.com (Parag Dhikale) — Mon, 13 May 2013 15:28:22 UT

Thanks a lot Jurriaan, That completely solved the problem. Really
appreciate your quick reply.
Thanks,
Parag