1. locking access to tables coderanch.com |
2. How to ensure a read-only table will never be locked? coderanch.comIt would be useful to know both - at database level and application level. I noticed that you can do setReadOnly with a connection. But I am using the same connection to write to other tables. I am using Microsoft SQL server. I can't find any property in the database in which I can make the table read-only. Thanks! |
3. Table Locking and Unlocking coderanch.comI am not sure that jdbc can lock a table. Suppose part of a transaction locks a row. If a connection is retrived from a connection pool, since close connection just returns it back to the pool, the row is not unlocked immediately. If a connection is created, closing connection will not release the lock immediately too. In either case, it's ... |
4. Newbie encounters table locking coderanch.com |
5. Table Lock coderanch.comHi, I have a several instances of Message Driven Beans accessing a single MySQL table. My first procedure "selects" a user id, if the user id does not exist it then executes an "insert" statement. Problem is, with my multiple MDB instances, there is a slight overlap when two identical user id's are inserted. The first MDB attempts to insert the ... |
6. locking table to get the new session id coderanch.comI am trying to generate a new session id everytime someone logs in to my application. Is this the best way to do it... con.setAutoCommit(false); stmt = con.createStatement(); stmt.execute("LOCK TABLE SYSADMA.DL_COUNTER IN EXCLUSIVE MODE;"); int currentID = 0; rs = stmt.executeQuery("SELECT COUNTER_ID FROM SYSADMA.DL_COUNTER WHERE COUNTER_LABEL='SESSION_ID';"); if (rs.next()) { currentID = rs.getBigDecimal("COUNTER_ID").intValue(); } currentID++; stmt.executeUpdate("UPDATE SYSADMA.DL_COUNTER SET COUNTER_ID = " + ... |
7. Table Locks coderanch.comHi all, Not sure if this question is one I should be asking here, if not, I am sorry. I am using mySQL (5.0.37) an am using a stored function to implement Oracle like sequence numbers. I am having a little issue with the update. So I was wondering if the use of BEGIN creates a lock on the table at ... |
8. Lock table in database when doing write operation. coderanch.comBased on my understanding, when we do write operation to a table in database (MYSQL) we lock the table from bein accessed by another processess. But not when we do read operation. Is this true? If yes, then is there a way I can turn of some settings so the write operation will not lock the table? Is there any disadvantages ... |
9. Table lock Problem coderanch.com |
10. Checking table locks in java coderanch.comHi all, i have a problem like, lets say a database table is locked in shared mode. At that time another thread is trying to put Exclusive lock on it. so my question is how can you check the type of lock present on a particular table. If we can find out that there is already some lock present on a ... |
11. problem related to locking the table coderanch.comHi, ranchers, i am facing a problem while applying locks on the oracle table.my intention is stop the accessing of table to other users, if the table is locked by one user. for this i wrote the code as follows Class.forName("oracle.jdbc.driver.OracleDriver"); con = DriverManager.getConnection("jdbc:oracle:thin:@192.168.2.123:1521:xe", "root", "paridb"); con.setAutoCommit(false); System.out.println("Successfully connected to " + "Oracle server using TCP/IP..."); String lock="lock table report@xe in ... |
12. problem related to locking the table coderanch.comHi, ranchers, i am facing a problem while applying locks on the oracle table.my intention is stop the accessing of table to other users, if the table is locked by one user. for this i wrote the code as follows Class.forName("oracle.jdbc.driver.OracleDriver"); con = DriverManager.getConnection("jdbc:oracle:thin:@192.168.2.123:1521:xe", "root", "paridb"); con.setAutoCommit(false); System.out.println("Successfully connected to " + "Oracle server using TCP/IP..."); String lock="lock table report@xe in ... |
13. java.sql.SQLException: "Table 'X' was not locked with LOCK TABLES" coderanch.comthank you for reply, I have seen the MYSQl doc.Well, I am explain you the what is the problem actually I am getting. I am using LOCK for a table(eg: Table A) in a method, And after complete process of that method doing UNLOCk that table(Table A)in finally block. But I got the LOCK Exception from different table(eg: Table B) of ... |
14. How can i explicitly lock a row of a Table coderanch.comHi How can we implement optimistic locking , i am using Oracle as Database for my Application . Assume that i am working on a single row of a Table . Now please tell me how can i explicitly lock this row , so that other simultanoues users insert or update operations are not affected to this particular row . I ... |
15. java.sql.SQLException: The total number of locks exceeds the lock table size coderanch.comHi, i am getting the below error. java.sql.SQLException: The total number of locks exceeds the lock table size. The same query what it is generating at the time of the above error is. INSERT INTO xxx (date,id,F1,F2,F3,F4,F5,F6,F7,F11,F12, COUNT) SELECT date,id,F1,F2,F3,F4,F5,F6,F7,round(avg(F11),2) F11,round(avg(F12),2) F12,COUNT(*) COUNT FROM yyy WHERE date >= ? AND date <= ? AND id = ? GROUP BY date,F1,F2,F3, F4,F5,F6,F7. ... |
16. SOLVED: SQL Drop Table; database always locked coderanch.comThe situation I have is a thick client that runs locally and get SOME of it's tables from a remote server. The tables it gets from the server are read only. I want to download what I need and work off line, then upload. I can go into more detail about the design but it's not very relevant to the problem. ... |
17. sql calls lock the iseries table java-forums.orgWhen I am choosing an AS400 job default library list,a database table is getting locked while querying that table through SQLContext.Is there a way of querying that table without creating a lock or remove the lock after the query is over? or what is the solution? code: context.getSQL(); RowCollection rc = (RowCollection)context.execute(); context.clear(); return rc; |
18. JDBC Lock Table forums.oracle.comI am developing two java programs that are accessing an Oracle database using JDBC. The two programs are to access to same table simultaneously. Is there a way I can use an sql LOCK TABLE command to lock a table while one program is writing to the table, and have the other program check for this Lock, and only proceed with ... |