prepared-statement

How to use PreparedStatement efficiently?

由 前提是你 提交于 2019-12-08 13:50:38
I like to use the DAO pattern and have a class which do all my SQL request for a particular table and JPA entity. I have for example something like: public class MyDao { @PersistenceContext(name = "mycontext") private EntityManager entityManager; public List<MyEntity> find(String code) { return getEntityManager() .createQuery("FROM MyEntity e WHERE e.code = :code") .setParameter("code", code) .getResultList(); } } But I also know we can use named query directly on the entity class with a static method (I don't like this way): @Entity @Table @NamedQueries({ @NamedQuery(name = "find", query =

Prepared Statements For ODBC in VB.net

由 帅比萌擦擦* 提交于 2019-12-08 12:04:23
问题 my question is a pretty simple one, however I simply cannot see where i have gone wrong. I just want to know how to create a prepared statement in VB. I know in java one would use ? and these would get replaced. I am aware that in VB you use @ParameterName. Basically my code gets down to where i use the prepare method and the error i get is that my syntax for my insert is incorrect. To me it seems that the parameter is not getting substituted in the insert statement Eg. Dim cmd As String =

preparedStatement setting null for NUMBER_ARRAY doesnt work

由 限于喜欢 提交于 2019-12-08 10:34:27
问题 ArrayDescriptor arrayDescriptor = ArrayDescriptor.createDescriptor("NUMBER_ARRAY", conn); if (parameter != null) { ARRAY oracleArray = new ARRAY(arrayDescriptor, conn, intList.toArray()); ps.setArray(i, oracleArray); } else { ps.setNull(i, Types.ARRAY, "NUMBER_ARRAY"); } In the above code I was trying to set oracleArray the to null. It does'nt throw any exception. But Oracle doesnt take it as null I guess. What could be the way to pass in a null, I mean to set a list to null what a orcle DB

How to use PreparedStatement efficiently?

由 断了今生、忘了曾经 提交于 2019-12-08 08:01:54
问题 I like to use the DAO pattern and have a class which do all my SQL request for a particular table and JPA entity. I have for example something like: public class MyDao { @PersistenceContext(name = "mycontext") private EntityManager entityManager; public List<MyEntity> find(String code) { return getEntityManager() .createQuery("FROM MyEntity e WHERE e.code = :code") .setParameter("code", code) .getResultList(); } } But I also know we can use named query directly on the entity class with a

Using prepared statement for Order by to prevent SQL injection java

由 跟風遠走 提交于 2019-12-08 07:39:15
问题 I have a query with where conditions , order by and limit. I am using prepared statements to set the where conditions and limit. Currently i am using string append for order by which causing SQL injection vulnerability. I cannot use set string to order by like this order by ? ? SQL Order functionality not working if i do like this. Example query: SELECT siteid, technology, address, state, status FROM archive LEFT OUTER JOIN mappings ON siteid = child_site_id order by siteid asc limit ? offset

PHP: stmt->execute() fails, but error is empty

由 家住魔仙堡 提交于 2019-12-08 07:30:42
问题 Following snippet is in my php-file, which figures as REST interface. (...) if ($stmt = $connection->prepare("INSERT INTO Resource VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)")){ $stmt->bind_param("sssssssii", $email, $timestamp, $title, $desc, $lat, $lng, $alt, $full, $cat); // 1) if($stmt->execute()){ // insertion of Resource successful // 2) }else{ // insertion of Resource failed echo "INSERTION_RESOURCE_FAILED"; $stmt->close(); die; } (...) The previous version, which was executed correctly, hadn

How can I bulk insert?

由 时光毁灭记忆、已成空白 提交于 2019-12-08 06:54:51
问题 I want to insert data to TERADATA with jdbc.But it is slow. How can I make it faster? I wrote this code: connection_tera= DriverManager.getConnection ( "jdbc:teradata://192.168.x.xx/database=DBC,tmode=ANSI,charset=UTF8","dbc","dbc" ); stmt_tera = connection_tera.prepareStatement("insert into a.b values(?)"); //some code here to start while loop stmt_tera.setObject(i,reset.getobject(i)); stmt_tera.addBatch(); if(addedBatchNumber%100==0) stmt_tera.executeBatch(); connection_tera.commit(); stmt

Sybase token datastream length was not correct

由 左心房为你撑大大i 提交于 2019-12-08 05:42:32
问题 Getting below error while saving a binary into a image column. org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [insert into lens_dal_data(dal_cd,user_id,insert_dt,exp_dt,url,map_data,cat_cd) values(?,?,?,?,?,?,?)]; SQL state [ZZZZZ]; error code [3805]; The token datastream length was not correct. This is an internal protocol error. ; nested exception is java.sql.SQLException: The token datastream length was not correct. This is

Boolean Mode Where Match Query with Dynamic Against Values, using PHP MySQLi Prepared Statements

由 有些话、适合烂在心里 提交于 2019-12-08 05:22:51
问题 I want to query mysql with a Where Match query using mysqli prepared statements . The problem is the Boolean Mode AGAINST values , normally: (+value1 +value2 +value IN BOOLEAN MODE) but the problem is that I can't use it in prepared statements e.g. (? ? ? IN BOOLEAN MODE) because the number of values will differ, its not fixed. I tried this code: $keywords = explode(" ", $SearchResults->squery); foreach($keywords as $key=>$value) { $keywords[$key] = '+'.$value; } $keywords = implode(",",

Why PreparedStatement is preferable over Statement

由 回眸只為那壹抹淺笑 提交于 2019-12-08 04:32:20
问题 Though , PreparedStatement can do everything i.e DDL ,DML related queries with better performance than Statement.Than , why still Statement interface exist in Java API? 回答1: Because some queries don't have any parameter, and preparing the statement and then executing it can actually be less efficient than executing the statement directly. It's also more readable and straightforward in this case to use (and potentially reuse) a single statement. Here's what the javadoc says, BTW: SQL
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