What is Dbms_lock sleep?
Answer: The dbms_lock. sleep procedure directs a PL/SQL anonymous code snippet or stored procedure (or function) to stop for a specified period of n seconds.
What is DBMS_ SESSION?
This package provides access to SQL ALTER SESSION and SET ROLE statements, and other session information, from PL/SQL. You can use DBMS_SESSION to set preferences and security levels.
What is DBMS_ lock in Oracle?
The DBMS_LOCK package provides an interface to Oracle Lock Management services. You can request a lock of a specific mode, give it a unique name recognizable in another procedure in the same or another instance, change the lock mode, and release it.
How to use DBMS_ lock in Oracle?
The DBMS_LOCK Interface
- ALLOCATE_UNIQUE procedure. The ALLOCATE_UNIQUE procedure returns a unique “handle” to a lock specified by the lockname parameter.
- REQUEST function. The REQUEST function is used to acquire a lock in the mode specified by the lockmode parameter.
- CONVERT function.
- RELEASE function.
- SLEEP procedure.
How do I put SQL to sleep?
In Sql Server to PAUSE OR SLEEP OR WAIT the execution of the script for specified period of time say 10 hours or 10 minutes or 10 seconds or 10 millisecond etc we can use the WAITFOR DELAY command.
Which is the valid Utl_file procedure or function?
Table 57-2 UTL_FILE Subprograms
| Subprogram | Description |
|---|---|
| FOPEN function | Opens a file for input or output with the default line size. |
| IS_OPEN function | Determines if a file handle refers to an open file. |
| FCLOSE procedure | Closes a file. |
| FCLOSE_ALL procedure | Closes all open file handles. |
How do I change the current schema in Oracle?
Just create a new connection (hit the green plus sign) and enter the schema name and password of the new default schema your DBA suggested. You can switch between your old schema and the new schema with the pull down menu at the top right end of your window.
What is Dbms_alert?
DBMS_ALERT supports asynchronous notification of database events (alerts). By appropriate use of this package and database triggers, an application can notify itself whenever values of interest in the database are changed.
What is SQL injection in Oracle?
Description SQL injection occurs when unexpected text is “injected” into your dynamically-constructed SQL statement, creating a substantial security issue in your application. Remember: injection can only occur when you concatenate chunks of text.
Is it possible to sleep in DBMS_lock?
3) Sleeping is not allowed during working hours. You need execute privilege on this package. Speak to your local DBA. For some reason, it’s very common for DBAs to be very reluctant to grant execute on DBMS_LOCK in some sort of “security by checkbox” madness.
Why is the DBMS_lock package not accessible by default?
The DBMS_LOCK package was not accessible by default, so an explicit grant was necessary for a session to use it.
Is there an invalid time limit specified for the sleep procedure?
As pointed out by Paul in the comments, if you specify a value of greater than 3600 when using DBMS_SESSION.SLEEP you get a “ORA-38148: invalid time limit specified”. This is not the case for the DBMS_LOCK.SLEEP procedure.
How to use “sleep” in procedures or functions?
To use “sleep” in your procedures or functions, login as administrator to your database (or ask you admin to to so) and create the following objects: CREATE OR REPLACE PROCEDURE sleep(seconds NUMBER) AS BEGIN DBMS_LOCK.SLEEP(seconds); END; / create or replace public synonym sleep for sleep; grant execute on sleep to public;