hibernate jdbc invalid column index

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Direct operations in Hibernate JDBC Interface

Description: Hibernate association in dealing with multiple tables and complex database queries such as grouping sorting operation, the inherent OR mapping mechanism will produce a large number of redundant SQL operations, system performance is much ...

Transfer: hibernate.jdbc.fetch_size and hibernate.jdbc.batch_size

hibernate.jdbc.fetch_size and hibernate.jdbc.batch_size hibernate.jdbc.fetch_size 50 hibernate.jdbc.batch_size 25 These two options are very, very important! ! ! Will seriously affect the performance of Hibernate's CRUD! C = create, R = read, U =

Hibernate JDBC and system tuning more

Comparing Hibernate and JDBC: First: Hibernate as the ORM, there is a problem inherent in ORM is due to persistent objects in sync, not able to use the bulk delete and bulk update sql, can only be amended in accordance with a primary key to operate. There

hibernate.jdbc.fetch_size and hibernate.jdbc.batch_

hibernate.jdbc.fetch_size 50 hibernate.jdbc.batch_size 25 These two options are very, very important! ! ! The CRUD will seriously affect the performance of Hibernate! C = create, R = read, U = update, D = delete JDBC Fetch Size of the Statement is set whe

hibernate.jdbc.fetch_size and hibernate.jdbc.batch_size

hibernate.jdbc.fetch_size 50 hibernate.jdbc.batch_size 25 These two options are very, very important! ! ! The CRUD will seriously affect the performance of Hibernate! C = create, R = read, U = update, D = delete JDBC Fetch Size of the Statement is set whe

ibatis in a "invalid column name"

If an object is defined in the xml in the nine column name, its insert operation, only to pass the value of eight columns, and the other as a non-required, threw out the "column name is invalid" There is time during the query, xml, also def

mysql add index to add multi-column index index Delete

Grammar CREATE [UNIQUE|FULLTEXT|SPATIAL] INDEX index_name [USING index_type] ON tbl_name (index_col_name,...) Example: Adding a separate index CREATE INDEX part_of_name ON customer (name); Adding multi-column index CREATE INDEX part_of_name ON custom

Hibernate + JDBC ClassCastException when operating Clob

Hibernate + JDBC Clob operation occurs when ClassCastException: $ Proxy58 Use System.out.println (blob.getClass (). GetName ()) output when the show is $ Proxy58 As can be seen from the Hibernate source code, <! - Generated by javadoc (build 1.4.2

SQL combined with a single index of the column index

Background: The current popularity of fast WEB, many web sites because the large flow of data and the occurrence of habitual server crashes, a query can only be applied in certain network environments. Unoptimized case of large amount of data when th

Clob using summary (SQL Server / Oracle / Hibernate / JDBC)

1, using the Oracle10g of JDBC, SQL Server's jTds JDBC driver, the operation of the Clob field can be used instead of String. "In the HBM mapping file corresponding to clob field using the type =" text "types, Java persistent objects co

hibernate exception undefined column

Oracle with hibernate operation the other day is encountered an exception, an exception undefined column, run the sql in the pldeveloper normal, run into the undefined column Hibernate exception, because the nested sub-query sql statements appear in

java.sql.SQLException: Missing IN or OUT index parameter:: 2

Has not written a savings process, and today tried to write the next, but the problem with the out, when calling the following exceptions: Execute SQL exception !SQL: {call P_VIP_RULE_INS(?,?,?,?,?,?,?,?)} java.sql.SQLException: Index missing IN or O

oracle-ojdbc6 the error message

ORA-17001 = Internal error ORA-17002 = Io exception ORA-17003 = Invalid column index ORA-17004 = Invalid column type ORA-17005 = Unsupported column type ORA-17006 = Invalid column name ORA-17007 = Invalid dynamic column ORA-17008 = Close the connection OR

Searsar metamorphosis Exception Summary

Throwable: org.seasar.framework.exception.SQLRuntimeException: [ESSR0072] SQLException (SQL = [], Message = [Invalid column index], ErrorCode = 17003, SQLState = 99999) occurred. The exception is generally considered to be a database the above mistak ...

oralce classification statistics

@Transactional @Component("statisDAO") @Scope("prototype") public class StatisDAO extends AbstractDAO { private static final String SQL_STATIS_CHANNELTYPE = "INSERT INTO channeltypestatis(uuid,counter,channeltype,accountarea,statistime,statisrange) "

Small talk about Hibernate under SQL Grammer Exception, Could not execute JDBC batch update exception solution

Hibernate-based application development process, the database through Hibernate operation, the program execution occurred during the SQL Grammer Exception, Could not execute JDBC batch update of the message. Encounter such problems do people feel puz

Hibernate insert the mountains of data comparison of the performance and Jdbc

System environment: MySQL Database Environment: mysql> select version(); -------------- select version() -------------- +----------------------+ | version() | +----------------------+ | 5.1.41-community-log | +----------------------+ 1 row in set (0.00

Jdbc Hibernate with the original gap between the bulk insertion

Written from a post long time ago. Purposes only to see the native Jdbc Hibernate and the gap in the end when the bulk insert how many less. Or respectively, 1W, 10W, 50W, 100W as a test. If another large amount of data that have suggested their own way t

How to determine the increase in the index to the database, added to which column it?

1, plus the field in the query or query sort field composite index field + 2, Canada 1. Need to connect the field conditions 2. Need to group the fields 3. Need to sort the fields. 3, add the column index of current events with conditions: - Query column

Hibernate unable to obtain a record insert data problem tossing jdbc

Roughly as follows Front: struts2 + spring3 + hibernate3 + mysql database used to obtain data on the page, contains a small amount of data updates. Back: jdbc + mysql to receive a client data sent (socket communication), and stored in the database fo

Hibernate Repeated column in mapping for entity exception

Bidirectional one to many association (class Item and class Bid): Item class: public class Item { private int id; private String name; private Set bids = new HashSet(); ••• } Bid type: public class Bid { private int id; private double amount; private Item

ibatis in a "column name is invalid"

If an object is defined in the xml in the nine column name, its insert operation, only to pass the value of eight columns, and the other as a non-required, threw out the "column name is invalid" There is time during the query, xml, also def

JDBC technology and database connection pooling feature (reprint)

JDBC Basics First, access the database using JDBC basic steps: A. loading JDBC driver B. definition connection URL C. establish a connection D. create a Statement object E. execute a query or update F. The results dealing with G. Close the connection Seco

hibernate configuration Xiangjie

1, hibernate.cfg.xml configuration Xiangjie Hibernate can be a description of the file properties properties file, it can be a xml file. Here to talk about the Hibernate.cfg.xml configuration. Configure the following format: 1. Configure Data Source Hiber

Hibernate in the 3-2-1

one-to-one, there are three ways to do one-to-many, there are two ways many-to-many there is a way. One-way many-to-one and one-way one-to-one is written is the same. Because one-way one-to-one is in a table set up outside the health. With foreign health

Solve the "could not read column value from result set: memo0_0_ exception" approach?

Exception Description: ejb3.0 programs do use jpa persistence, using the database sql server2000, deployed in jboss. Client of this entity in the query time, throw the following exception -------------------------------------------------- ----------- ...

Hibernate common errors

Hibernate common errors Hibernate common errors 1. Error: object references an unsaved transient instance - save the transient instance before flushing: com.xxxx.bean.java.Sysblog; nested exception is org.hibernate.TransientObjectException: object referen

hibernate one to many Liezi

Look at the Azolla translation team (RedSaga Translate Team) translation-to-many configuration instructions and then look at examples of one to many association (One-to-many Associations) One to many association by foreign key connecting the two clas

hibernate cascade delete encountered problems and solutions

We know that in dealing with hibernate-many of the problems, we generally in the configuration file Zhong stated below their relations and operations Rules . For example, when doing Web page, the article will list owners and Bo is the one to many relation

Hibernate Developer Guide

They come in here and are attributed to Sri Lanka. Hope to talk to some use. This is not trying to replace Hibernate Reference, relatively speaking, Hibernate Reference Purpose is the preparation easier for developers to provide the index entries, and thi

[Transfer] Hibernate performance tuning

Many people think that Hibernate naturally low efficiency and, indeed, in the general case, the need to perform the conversion for the SQL statements Hibernate efficiency than direct JDBC access, however, after after a good performance optimization, Hiber

Cart combat II: entity class and the hibernate configuration file

1. According to the above four tables set up, we Mr. category into four entities, namely: Account, Order, Item, Product Account as a result we will be in the city and the street into an abstract entity class Address, therefore, there is a category Account

The realization of the field of Hibernate objects with custom fields

testing ...... Introduction In the development of enterprise-class business applications (enterprise scale), the customers tend to demand the system without modifying the source code of the application object model to support scalability. Use of extensibl

Hibernate previous notes, paste-sharing

1, one-on-one relationships: Description: Student and Certificate is a one-on-one relationship; # 1) based on the primary key of the associated Student.hbm.xml (Main): <one-to-one name="cer" fetch="join" cascade="all"/>

Liferay under development to integrate Spring and Hibernate debut Plugin

In short, do not know what to do under the development of Liferay. With SSH it is totally against the background knowledge, himself wrote a version independent firms get into the web application, is a good run up. If any of Liferay people more familiar wi

HIbernate in line with Java custom relational database persistence of XML configuration

Hibernate-mapping <hibernate-mapping schema = "schemaName" (1) catalog = "catalogName" (2) default-cascade = "cascade_style" (3) default-access = "field | property | ClassName" (4) default-lazy = "true | fal

Struts + Spring + Hibernate in technology

1, 3 Framework Overview Struts: Struts is Java Web MVC framework undisputed king. After more than five years of development, Struts has gradually grown into a stable, mature framework, and possession of the MVC framework for the largest market share. Spri

The use of spring and hibernate configuration ehcache and query cache

ehcache.xml: <ehcache> <! - MaxElementsInMemory for the maximum number of cached objects, eternal setting is always a view, however, timeToIdleSeconds the object is idle maximum number of seconds, timeToLiveSeconds the object in the cache state o

Chuan Zhi Yong Jdbc video podcast notes (1-6)

1, jdbc theory overview: JDBC (Java Data Base Connectivity, java database connectivity), by a number of interfaces and classes constitute the API. J2SE part, by the java.sql, javax.sql package composed of 2, write a simple example jdbc 3, analysis of the

hibernate annontaion learn more

Hibernate Annotation Description Turn http://relucent.javaeye.com/ @ Entity public class Flight implements Serializable ( Long id; @ Id public Long getId () (return id;) public void setId (Long id) (this.id = id;) ) @ Entity annotation to a class declarat

2009-12-30 Chuan Chi-hibernate based podcast (Reprinted)

Hibernate is taught by a teacher Pei-Cheng Xu, Chuan-Chi teacher is the podcast I want to find the kind of teacher. Has rich experience in work experience and project structure. And their teaching experience is also very rich! Xu Jinglei lectures are very

hibernate connection mysql BEGIN NESTED EXCEPTION error c3p0 configuration solutions (zz)

hibernate connection mysql BEGIN NESTED EXCEPTION error c3p0 configuration solutions (zz) the development of a new Web site, open every morning to have access to the database on the abnormal operation of the database to Mysql. That is a long run in each o

hibernate oracle clob field operation

Database-driven driver for the 10g, you can operate the same as the operation of STRING a CLOB HIBERNATE configuration add a line: <property name="hibernate.connection.SetBigStringTryClob"> true </ property> HIBERNATE mapping CL ...

spring + hibernate + struts2 annotation to achieve paging (2)

Wrote a few days to achieve ssh2 page, leaving a mark into the blog, first paste the code free to write shows spring configuration file <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="h

Hibernate inheritance mapping a: a table for each class hierarchy

Configuration is as follows: Test is the first to create a database in mysql hibernate. And then configured the following files in the root directory src hibernate.cfg.xml log4j.properties ext1.hbm.xml Here inheritance mapping configuration in accord ...

Hibernate handle the problem of large data

Resolve data-intensive problems I think the most important points : 1. Even if you clear the cache In handling large amounts of data, the data is saved in the buffer Session The L1 cache, the cache is too large to display performance when serious , After

hibernate ehcache Xiangjie

Transfer from (http://www.blogjava.net/i369/articles/219407.html) What 1.EhCache EhCache is one of Hibernate second-level cache, you can check out the data stored in memory or disk, to save next time the same query once again query the database, significa

Hibernate batch processing (Batch processing)

Use Hibernate will insert 100,000 records into the database may be a very natural way so Session session = sessionFactory.openSession (); Transaction tx = session.beginTransaction (); for (int i = 0; i <100000; i + +) ( Customer customer = new Cus

Common errors and debugging JDBC

Database: MySQL When applied in the preparation, in order to facilitate the debugger, exception handling code in the exception message is displayed, so that errors can debug code. Exception handling code is usually written like this: try ( ... ) Catch (Ex

Struts + Spring + Hibernate's technology

1, 3 About the framework Struts: Struts is Java Web MVC framework undisputed king. After more than five years of development, Struts has gradually grown into a stable, mature framework, and the possession of the MVC framework for the largest market share.
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