Mashups in EMML : Writing Mashups in EMML : Controlling Mashup Processing Flow : Database Mashable Transactions : <presto:beginTransaction>
<presto:beginTransaction>
This Presto extension statement opens a connection to a data source and marks the beginning of a database transaction within the mashup for the specified database mashable. All invocations of that service are considered part of the transaction until a rollback or commit is found.
Note:  
Transaction handling using this statement is only required for database services created in Presto 2.7.0 or earlier. See SQL Transactions for transaction handling information for database services created in later versions.
See Database Mashable Transactions for more information and examples.
Can Contain
Empty
Allowed In
mashup | catch | else | elseif | for | foreach | if | macro | operation | sequence | try | while
Attributes
Name
Required
Description
service
yes
The name of the database mashable whose invocations should be considered part of this database transaction.
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