Customizing the JDBC Environment

In this section:

The Adapter for JDBC provides several parameters for customizing the environment and optimizing performance.


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Specifying a Timeout Limit

How to:

TIMEOUT specifies the number of seconds the adapter will wait for a response after you issue an SQL request to JDBC.



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Syntax: How to Issue the TIMEOUT Command
ENGINE SQLJDBC SET TIMEOUT {nn|0}

where:

SQLJDBC

Indicates the adapter. You can omit this value if you previously issued the SET SQLENGINE command.

nn

Is the number of seconds before a timeout occurs. 30 is the default value.

0

Represents an infinite period to wait for a response.


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Cancelling Long Requests

How to:

You can cancel long running requests from the Web Console. Depending on the capabilities of the native JDBC driver, this action will either cancel the request entirely or break out of the fetch cycle.



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Procedure: How to Cancel Long Requests
  1. From the Web Console menu bar choose Workspace, Configuration/Monitor, Java Services, DEFAULT. Right-click on DEFAULT and select Agents.
  2. In the Java Services Agents pane, highlight a row with the jscomid you wish to kill, right-click on it and select Stop.

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Obtaining the Number of Rows Updated or Deleted

How to:

PASSRECS returns the number of rows affected by a successfully executed SQL Passthru INSERT, UPDATE, or DELETE command.

Tip: You can change this setting manually or from the Web Console by clicking Data Adapters on the menu bar, clicking a configured adapter, and choosing Change Settings from the menu. The Change Settings pane opens.



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Syntax: How to Obtain the Number of Rows Updated or Deleted
ENGINE SQLJDBC SET PASSRECS {ON|OFF}

where:

SQLJDBC

Indicates the adapter. You can omit this value if you previously issued the SET SQLENGINE command.

ON

Provides the number of rows affected in the application program SCB count member after the successful execution of an SQL Passthru INSERT, UPDATE, or DELETE command. ON is the default value.

OFF

Provides no information after the successful execution of an SQL Passthru INSERT, UPDATE, or DELETE command.


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