How do I check if a table is locked in Sybase?
You can view locks in Sybase Central. Select the database in the left pane and then click the Locks tab in the right pane. For each lock, this tab shows you the connection ID, user ID, table name, lock type, and lock name.
What is a database table lock?
A database lock is used to “lock” some data in a database so that only one database user/session may update that particular data. So, database locks exist to prevent two or more database users from updating the same exact piece of data at the same exact time.
How do I change the locking scheme in Sybase?
lock to change the locking scheme for a table from allpages locking to data-only locking or vice versa, the SAP ASE server makes a copy of the table’s data pages….You can change:
- From allpages to datapages or vice versa.
- From allpages to datarows or vice versa.
- From datapages to datarows or vice versa.
How do you check if there is any lock on table in Oracle?
You can check table lock from v$lock and dba_objects view. Below query will give you the lock details. Select the session id and kill the process which is holding the lock on schema user.
Which is an example of a schema lock?
Schema locks, both shared and exclusive, are applied to individual datasets and related tables. For example: If you acquire a lock on a feature class within a feature dataset, the lock applies to the entire feature dataset and its contents. Locks also apply to both sides of a relationship class.
How does schema modification lock work in SQL Server?
SQL Server allows a single schema modification lock (Sch-M) lock on any locked object. In order to modify a table, a transaction must wait to acquire a Sch-M lock on the target object. Once it acquires the schema modification lock (Sch-M), the transaction can modify the object and after the modification is completed and the lock will be released.
How do you lock a table in MySQL?
LOCK TABLES table_name [ READ | WRITE] In this syntax, you specify the name of the table that you want to lock after the LOCK TABLES keywords. In addition, you specify the type of lock, either READ or WRITE. MySQL allows you to lock multiple tables by specifying a list of comma-separated names of tables with lock types that you want to lock
How does the schema lock work in ArcGIS?
The one exception to this rule is when unselecting a geodatabase in ArcCatalog; the folder containing the geodatabase must be manually refreshed to release the lock on the geodatabase. This section describes how these schema locks work.