August 2001
Intermediate to advanced
976 pages
38h 8m
English
Content preview from Programming ColdFusionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Transaction Processing
ColdFusion provides support for database
transaction processing using the CFTRANSACTION
tag. The CFTRANSACTION tag lets you treat all
query operations with the <CFTRANSACTION>
and </CFTRANSACTION> tags as a single
transaction. Changes to the database aren’t committed until all
queries in the transaction have executed successfully. In the event a
query within the transaction fails, all previous queries are
automatically rolled back. The exception to this occurs when the
database itself is changed, as in the case when a table or column is
created or deleted.
The CFTRANSACTION
tag accepts two optional attributes for controlling how transactions
are processed, ACTION and
ISOLATION:
-
ACTION Specifies the transaction action to take. Valid options include:
-
Begin (default) Specifies the beginning of the block of code to execute
-
Commit Commits a pending transaction
-
Rollback Rolls back a pending transaction
-
-
ISOLATION Specifies the ODBC lock type to use for the transaction. The following ODBC lock types are supported:
Read_Uncommitted,Read_Committed,Repeat-able_Read, andSerializable.
Note that not all databases and/or database drivers support isolation levels. Many support only a subset of those listed. Refer to your particular database/driver’s documentation for more information on the isolation levels supported.
Example 11-26 shows how to use the
CFTRANSACTION tag with two queries that delete records from different tables within the same data source. You need ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.