ij Commands and Errors Reference,
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Wait For

Async

Syntax

ASYNC Identifier String

Description

The Async command lets you execute an SQL statement in a separate thread. It is used in conjunction with the Wait For command to get the results.

You supply the SQL statement, which is any valid SQL statement, as a String. The Identifier you must supply for the async SQL statement is used in the Wait For command and is a case-insensitive ij identifier; it must not be the same as any other identifier for an async statement on the current connection. You cannot reference a statement previously prepared and named by the ij Prepare command in this command.

ij creates a new thread in the current connection to issue the SQL statement. The separate thread is closed once the statement completes.

Example

 ij> async aInsert 'INSERT INTO t VALUES 1,2,3,4';
 ij> INSERT INTO t VALUES 5,6,7,8;
 4 rows inserted/updated/deleted.
 ij> wait for aInsert;
 4 rows inserted/updated/deleted.
-- the result of the asynchronous insert
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