ESQL

Note that using these constructs in ESQL has no influence on how the message is rendered on the wire.

This produces a very detailed trace for all code execution that took place in ESQL.

The extract of ESQL below shows how the labels are set up to use the in the incoming message.

The following ESQL code can be used to create an appropriate message (and would be coded in the "BuildTimeoutMessage" node above).

An ESQL namespace declaration corresponds closely to the idea of a namespace prefix in XML.

The execute function syntax can be accessed through dbaccess, or through a ESQL C or Java program.

If message throughput is a primary consideration, ESQL or Java is probably a better choice for your processing logic.

In this example, ESQL is added to the Compute node to determine when to send a message to the Finish File terminal.

All entries use the message id 3001, the name of the node in the message text is "CciLogParser - Extension for ESQL" .

ESQL String manipulations are processor intensive operations.

The data will then be operated on by either ESQL or other client programs.

Though this is a major enhancement, merely procedures or functions in ESQL -- and no other language -- can be implemented.

It uses a simplified case study, with extensive sample code, to implement a plug-in parser and add trace calls to the ESQL code.

Observe that the message tree OutputRoot. CCILOG should be detached at the end of the ESQL program.

Since ESQL is derived from SQL, it is particularly good for manipulating message data when a lot of database interaction is expected.

Thus wherever possible reduce the number of ESQL statements.

Should be detached at the end of the ESQL program.

The level, normal, shows no ESQL execution trace at all.

At development time, these message definitions support the use of extended SQL (ESQL) content assist and the creation of mappings.

The aim of this case study is to add some trace calls to the ESQL code of Figure 1.

Add a Compute node (Invalid Claim, in Figure 5) and include the ESQL in Listing 5 to set the appropriate reply information.

Fixed -- ESQL read-write path (field reference) field property.

This is indicated in ESQL SET statement syntax using a colon character to separate the two sections of the Qualified Name.

This procedure is not as flexible as the nodes that use ESQL for their processing.

Fixed -- ESQL read-only path (field reference) field property.

The ESQL code required to perform our chosen transformation is shown below.

The condition specified in the node can use an ESQL reference or XPath expression.

The CreateEvent node converts the valid input messages to the event message format required by Business Events using the ESQL language.

Mixed -- ESQL or XPath read-write path location field property.

Mixed -- ESQL or XPath read-only path location field property.

Some common algorithms such as Base64 encoding and MD5SUM would have to be written by hand in ESQL, but are already available in Java.

If there is a need to send multiple output messages of the same input message then Use PROPAGATE function in the ESQL.

You can also directly call external stored procedures from ESQL, and handle result sets as necessary.

Accordingly all syntax elements it created in the tree were of ESQL data type CHARACTER.

Include a Compute node (SetReply in Figure 5) and include the ESQL in Listing 6 to set the appropriate values in the reply message.

The provided ESQL code samples demonstrate how to create messages equivalent to those generated using message set settings.

This is shown in the ESQL in the broker section above.

Listing 5. Shows an improved implementation of the original ESQL program that was first introduced in Figure 1.

This is shown in the ESQL in the broker section.

Use dynamic references during ESQL coding in order to improve the efficiency of message tree navigation.

The ESQL also sets the value of the RequestURL field to the value carried in the URL field of the input message.

The alternative has been to code logic in ESQL and call Java procedures from the ESQL, or write custom processing nodes.

ESQL to regulate versioning of a WSDL document

ESQL namespace declarations and code completion

Checking an e-mail address could be invoked in ESQL using the following statements

Drag and drop for message flow development, covering facilities such as ESQL modules, Java classes, and XSL stylesheets