LOCK TABLE

Purpose

Locks a table to control access by other processes

Syntax

LOCK TABLE [<database>!]<table> IN SHARE | EXCLUSIVE MODE [NOWAIT]

See Also

COPY DATABASE, CREATE DATABASE, DISPLAY SCHEMAS, INSERT, LIST SCHEMAS, OPEN DATABASE, SELECT, SET AUTOCATALOG, UPDATE, USE

Description

To lock tables to control access by other processes. The LOCK TABLE statement locks an entire table to restrict access by other users or transactions. There are no prerequisites required to perform this operation.

Keywords	Description
database	The name of the database to which the table belongs. The '!' character must be included between the database name and the table name.
table	The name of the table to set the lock mode on.
SHARE	Share locks allow queries on locked tables, but prevent updates.
EXCLUSIVE	This lock denies access by any other process to the table
NOWAIT	This specifies that if a lock cannot be granted immediately during an update, then an error should be returned.

Example

LOCK TABLE staff IN SHARE MODE