Hi, I am trying to do 2 output data from mysql to a csv file. My code is as follows: public void exportData(Connection conn,String filename) { Statement stmt; String query; try { stmt = conn.createStatement(); //For comma separated file query = "SELECT * into OUTFILE '/tmp/input.csv'...
I ve installed MySQL (last update). I need to code, that ll create & establish a connection with SQL DB & manage the DB(using SELECT, INSERT, CREATE). I did everything but, I am not able to create connection. I've also installed the MySQL/J connector, I just extracted the .zip pack in a folder & added the folder path in Variables). Ca...
We have data stored in oracle 10g db which contains french character set. The requirement is to read the data and generate a output file using Java. I checked the validity of the data in Oracle db via SQL*plus and it looks good. From windows: set NLS_LANG=AMERICAN.AL32UTF8 sqlplus scott/tiger sql> select billing_address from MYTABLE ...
I really enjoy the JDBC abstraction in Java. I don't care what database type I am connecting to, or what driver is being used. That's all set up in the DataSource object, and once it's done, we just use connections. It's such a consistent API in order to commit/rollback, perform transactions, and you only need to learn it once, and move ...
Where can I see example of scala.dbc update statement? I have found select statement example only... select fields ( ("url" of characterVarying(32)) and ("name" of characterVarying(32)) and ("last_update" of integer)) from ("feeds") ...
Here is my class: import java.sql.Connection; import java.sql.Statement; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; public class DisplayAuthors { static final String JDBC_DRIVER = "com.mysql.jdbc.driver"; static final String DATABASE_URL = "jdbc:mysql://loc...
I have defined the data source in struts-config.xml. I want to get a connection from it in a Struts action class. The code is: public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { LoginForm loginForm = (LoginForm) form; Connection con = null; DataSo...
I'm not interested in Spring/JPA etc. I like straight up JDBC/ODBC. I was wondering what are the good (actually production ready) tools to enable taking a database schema and generating objects/daos that fetch/update them? I am intersted in Java and C++. I am interested in ramping up more on C++ in order to get away from all of this Spr...
I want to read data in blocks of say 10k records from a database. I found Result limits on wikipedia and it seems obvious that this can't done with sql in a portable way. Another approach could be JdbcTemplate which offers many methods for queries, but how could I decide that enough rows have been read. Through the callbacks like RowMa...
I am trying to use prepared statements which operate on a database located quite far away, there is considerable lag and unreliability involved in the network connection used to access this database. Downtimes of up to a minute are common. The problem is that in case of such a failure, if my program tries to execute any prepared stateme...
Hello All, I am having a problem in my code where I am stuck that the table pagination is not working. Probably only 5 records are retrieved. Please help me to solve my issue: It is only now showing the first record of my SQL in the table <form name ="form" action="Report1.jsp" method="post" > <%! int numPages = 0; %> <% String column...
how can we call JDBC code function from another application? so that we don't need to write JDBC code again and again ...
Hello. My application uses some prepared statement in every iteration of infinity loop. Is it safely to create preparedStatement before the loop and to run only pstmt.execute in the loop? Also it is interesting about simple statement. ...
In our application we allow user to enter email ids comma separated. We take the email ids separate it and insert as records in a table. When they enter email ids less than 10000, everything goes fine. If it goes beyond 10000 the whole application hangs, we are not able to login the application. Technical Details Java Servlet and JSP...
Hi, I get this exception only for SOME database update in my code after several days of application running. Some of the requests passed, and some of them (the same java code) fail. java.sql.SQLException: MaxOpenPreparedStatements limit reached at org.apache.commons.dbcp.PoolingConnection.prepareStatement(PoolingConnection.java:1...
My web application needs to get the results of all the items which have their time value for this minute. My table has a time attributes id, message, time, ..., where time is of type timestamp with timezone. I need to get a list of all entries where the time is the current minute. Comparing the entire value does not match because the ...
I was playing around with the DatabaseMetaData class to see how it works. The java doc comments seem to state one thing, while the code does a different. I know it is an interface, so it is really up to the vendor that supplied the JDBC driver to implement this correctly. But I was wondering if I am missing something or not? I am using...
Hi, I have such oracle object: CREATE OR REPLACE type employee_obj AS object ( id NUMBER(10) , ... ) stored procedure function get_employee_obj () return employee_obj is l_employee employee_obj; begin ... return l_employee; end; and I need to call it from java code: ...
I want to create a login page using Servlet & JSP. I ve created a page which gets Username & password. I made a database with a table which contains Username & password. <form action="LoginPage" method="POST"> User name: <input type="text" name="userName" size="20"><br> Password: <input type="password" name="password" size="20...
Hi All - I am working on an application where I need to connect N number of database systems [N ranges any where between 1 to 350]. The idea is - the user will be presented with a list of databases and will be asked to select any or all of the databases from the list. Once the databases are selected, I need to connect to each of the ...