"Read" Triggers

Are there such things as Read Triggers in Oracle 8i?
My requirement is to write an entry to a transaction table every time a user views a row in a billable table (i.e. a pay-per-view system).
It occurs to me that a row-level trigger based on the user reading an entry in the transaction table would satisfy the requirement, but the last time I used triggers was four years ago and I don't remember "Read" being an option then.
Can anyone help?
null

a way to accomplish that is to create so called procedural interface - user can access (including, select, delete, insert and update) a table only via procedures.
Then in Your procedures You can log everything You want

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Hello, everyone.
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Both are necessary.
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In the first suggestion, I'm unclear about one aspect of how I would accomplish this. I assume I would allow people to modify fields in the form, but that when they did, a msgbox would pop up that would inform them that, if they continued with this modification to a signed form, the signature would be removed. I'm all good to that point. But if they answered that they do not want to continue modifying that field and removing the signature, how can I code it to set the value back to what it was before the change? Is there some method that will give me access to the value of the field BEFORE the attempted modification? I went looking for something like $.previousvalue, but found nothing.
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As soon as i deploy the composite the file adapter starts polling without waiting for input.
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Hi there,
IMHO the traditional read is used only as inbound operation, that means
that it starts polling the input folder as soon as the composite gets
deployed - which is the same you are experiencing.
In your case you need an outbound operation that needs to be invoked at
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read, but this is the only outbound read operation supported by the
adapter. If you can not use the sync read, then you would have to design
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https://technology.amis.nl/2012/01/22/using-the-oracle-weblogic-technology-adapters-with-custom-java-message-driven-bean-mdb-triggered-by-file-adapter-part-of-the-story/.
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Read access to procedures,function,packages and triggers

Hi,
I created a user with CREATE SESSION,SELECT ANY TABLE privilege. My objective is to create a user with read only access to other schemas. But the newly created user is not able to read procedures,function,packages and triggers. The new user need read access to procedures,function,packages and triggers. What is the priviege required for this access? Please help me to resolve this issue.
Regards,
Mat.

Hi,
Grant select all will give select privileges to all schema level objects except procedures,function,packages and triggers. But I need to grant read privileges on these objects to newly created user.
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Hi folks,
I'm VERY new to LabVIEW and need some help with a measurement. I'm using LV 8.2 with all equipment on GPIB. I have two 34401A multimeters, triggered externally using an HP 33120A function generator. I've downloaded the example vi's and drivers and everything works fine. My problem is with the speed of the triggering and the synchronization between the two multimeters on the same trigger. I've read the manual and for this multimeter, it claims it can be triggered and read over GPIB at 1kHz (display off, auto range off, delay= 0, 4.5 digits). I'm finding it is nowhere near this speed. The fastest I have successfully triggered and recorded the data was at 100 Hz, anything higher and it no longer stays in sync with the trigger (i.e. for 200 measurements at 100 Hz, I'm getting all 200 measurements, but over 3-5 seconds). The trigger speed is the first problem. The second problem is getting the two meters to take a reading at the same time. One meter always lags the other (or vice versa) by 1 to 3 readings. My goal is to continuously (for about 60 seconds) read both multimeters as fast as possible and at the same time (250-500 Hz would be fantastic) and write it to a file. Can anyone give me some advice on this? Is a software trigger the way to go? Is there some limitation with GPIB that it cannot read/write to two devices this fast?
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Hi plasma420,
I should have read your post more carefully - was thinking it was a 1 sec acquisition, not 1 minute!
Getting your LabVIEW app to reliably respond to a measurement (detect/read) every 2 to 4 ms is going to be tough - especially if in a multi-tasking OS environment. On a 2GHz box running a normal Windows XP or 2K install, I suspect you could see an occasional "hiccup" even at 100Hz. A bit of searching the forum turned up this old-but-still-valuable (even entertaining) post related to improving determinism of DAQ applications on a PC.
Observation: The listed max measurement-rate of the 34401 (1000Hz) may assume the GPIB-bus is dedicated to one instrument - the requirement to read from two instruments sequentially, may necessarily increase time spent servicing each trigger - decreasing maximum theoretical throughput.
The first rule for "high-speed" multi-sample DAQ - especially under Windows - is to make it a hardware task instead of a software loop; the 34401 doesn't seem well suited here. I hate to suggest this, but... have you considered purchasing one of NIs multi-channel DAQ devices? With a $360 PCI 6010 + cable and break-out box, you could have one of the LabVIEW DAQ examples running in ~ 30 min. The 6010 was the cheapest 16-bit board I could find, ask your sales-rep for other alternatives if you go this route...
Cheers!
"Inside every large program is a small program struggling to get out." (attributed to Tony Hoare)

"Read" Triggers

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