The query returns only 4-5 rows. It takes less than 1 second to execute. I have trid increasing the timeout of both cfquery and cfsetting but not working. most of the time code runs successfully but i got this error after every 20-30 request. I am using sql server database. I know when you restart the cf server or db server timeout issue occurs sometimes but this error is comming without restarting of any service (cf or sql server). I think there should be some setting changes in cf server please suggest.
The request has exceeded the allowable time limit Tag: CFQUERY
The error occurred on line 180.
<CFQUERY NAME="Sections" DATASOURCE="abcd">
SELECT * FROM News_Sections where Section = 'Home' ORDER BY Page_order
</CFQUERY>
The likely problem here is going to be the database not ColdFusion. I have a couple of tips for you. First, using the MSSQL Activity Monitor check out blocks (as a wait type). If you see a block or a "head blocker" click on that item and it will show you the query (sometimes :).
Once you locate it, fixing the problem will involve indexing or changing the query (complex joins or sub-queries often have unexpected consequences).
You might have some luck using "WITH(nolock)" in the above query to allow for a dirty read (probably ok if you are just getting categories). You might also consider caching the above query using cachedwithin or placing it in the application scope. If it is just broad "home" categories that seems reasonable to me (though obviously I don't know your schema.
My final bit of advice is to examine the page on which the error takes place closely. Sometimes the line number is off a bit. If you have groups of queries together it may not be the query you think is erroring out but the one above it. It's not common but it can happen.
As was pointed out by Mr. Bracuk, this may not be a problem with your query. This error has to do with the setting in the CFAdmin for Request timeouts. It is the page that is loading that has experienced the timeout and thrown the error. When the timeout occurred it just happened to be processing your query.
So, while the query is a good place to start looking, make sure to examine the entire script when searching for the cause of the timeout.
Does anyone have an example of ColdFusion working with neo4j (or some other graph db)?
The common practice is to have an application service connect to a db. In CF it looks like the code below. One can then output the data.
<cfquery...>
select * from tbl where x=y
</cfquery>
What I'm looking for is a way to connect to and 'consume' graph data, such that I can feed it to a UI that displays the graph connections.
I am currently at step 1. How do I connect to a db (I'm liking neo4j) so I can pass a query and get something back. Ideally something like:
<cfquery ... >
MATCH (node)
RETURN node.propertyA, node.propertyB
</cfquery>
Is it even possible?
I would use CFHTTP and use Neo4j's REST endpoint to query Neo4j.
http://neo4j.com/docs/stable/rest-api-cypher.html
I have a CFM Page where I call a Stored Procedure.
The page seems to be timing out due to the query taking too long to execute.
We have tried optimizing/tuning the SQL query, made Clustered and Non-Clustered Indices , but the query is still taking around 4 minutes to execute.
Now , the only way to solve this is to increase the Cold Fusion Timeout in the Front End.
But ,I have tried increasing the timeout by using the below snippet on the CFM page.
<cfsetting requestTimeOut="600">
But this is not working. The page keeps timing out after 120 seconds and throws the timeOut Error.
We have also tried to pass a URL parameter "requestTimeout=600" but still the page is getting timed out after 120 seconds.
Can you please suggest a solution to increase the TimeOut in ColdFusion other than the ways we have tried above.
Cfstoredproc has a timeout attribute you can use. Documentation is here.
Edit Starts Here
For MX7, try a cfquery tag
<cfquery timeout = something>
exec yourProcedure
#param1 = <cfqueryparam etc>
etc
</cfquery>
You can call a stored procedure using the cfquery tag instead of the Cfstoredproc tag. Below a simple example:
<cfquery name="qryName" datasource="#yourdatabase#">
call nameOfStoredProcedure( #yourvariables#);
</cfquery>
I use mysql as the back end database engine, i do not know if this also works with other database engines.
Coldfusion has a system created client variable called lastvisit.
Is there a way to get the value of that variable during the request that it is actually set (i.e. client.thisvisit)?
The idea would be that I can store the "ThisVisit" timestamp in session and then compare it to lastvisit when the next request is made. This would tell me if another request was made in the session.
The purpose is that we have a page that we use an ajax record lock on which refreshes the lock every minute. After sixty minutes the ajax lock code will automatically log the user out of the website (due to inactivity). The issue arises where the user is executing tasks in other windows/tabs (indication of activity).
Sense all requests update LastVisit, I would like to have the ajax lock code save the save a "thisvisit" value so that the next time it runs it can compare it to the LastVisit client variable.
A couple requirements:
Set up to use a DB rather than registry for your client vars (trust
me).
Client vars have to have "global variables" enabled
Your cfapplication or application.cfc has to have client management enabled.
If you have those three things you can select a query like the following:
<cfquery name="getLvisit" datasource="myClientVarsDB">
SELECT lvist
FROM cglobal
WHERE cfid =
<cfqueryparam type="CF_SQL_CHAR" value="#urltoken#"/>
</cfquery>
urltoken might be wrong... it may need the jsessionID or CFID but my memory tells me cftoken. I'd have to hunt down a site using Client DBs to give you a definitive answer.
So that would give you the current value of the lvisit variable. you would store this in the session and then compare it against the value from the table on subsequent queries before you overwrite it again (if that makes sense).
Note - this value is updated on each request - so your query get's the current value (before it has been updated). I previously thought this it was updated first but according to Tom it's actually updated last.
Is it possible to Execute 2 insert or Update Statements using cfquery?
If yes how?
if no, what is the best way to execute multiple queries in Coldfusion, by opening only one Connection to DB.
I think every time we call cfquery we are opening new connection DB
Is it possible to Execute 2 insert or
Update Statements using cfquery?
Most likely yes. But whether you can run multiple statements is determined by your database type and driver/connection settings. For example, when you create an MS SQL datasource, IIRC multiple statements are allowed by default. Whereas MySQL drivers often disable multiple statements by default. That is to help avoid sql injection. So in that case you must to enable multiple statements explicitly in your connection settings. Otherwise, you cannot use multiple statements. There are also some databases (usually desktop ones like MS Access) that do not support multiple statements at all. So I do not think there is a blanket answer to this question.
If the two insert/update statements are related, you should definitely use a cftransaction as Sam suggested. That ensures the statements are treated as a single unit: ie Either they all succeed or they all fail. So you are not left with partial or inconsistent data. In order to accomplish that, a single connection will be used for both queries in the transaction.
I think every time we call cfquery we
are opening new connection DB
As Sam mentioned, that depends on your settings and whether you are using cftransaction. If you enable Maintain Connections (under Datasource settings in the CF Administrator) CF will maintain a pool of open connections. So when you run a query, CF just grabs an open connection from the pool, rather than opening a new one each time. When using cftransaction, the same connection should be used for all queries. Regardless of whether Maintain Connections is enabled or not.
Within the data source settings you can tell it whether to keep connections open or not with the Maintain Connections setting.
Starting with, I believe, ColdFusion 8 datasources are set up to run only one query at a time due to concerns with SQL injection. To change this you would need to modify with the connection string.
Your best bet is to turn on Maintain Connections and if needed use cftransaction:
<cftransaction>
<cfquery name="ins" datasource="dsn">
insert into table1 values(<cfqueryparam value="#url.x#">)
</cfquery>
<cfquery name="ins" datasource="dsn">
insert into table2 values(<cfqueryparam value="#url.x#">)
</cfquery>
</cftransaction>
And always, always use cfqueryparam for values submitted by users.
the mySQL driver in CF8 does now allow multiple statements.
as Sam says, you can use to group many statements together
or in the coldfusion administrator | Data & Services | Data sources,
add
allowMultiQueries=true
to the Connection String field
I don't have CF server to try, but it should work fine IIRC.
something like:
<cfquery name="doubleInsert" datasource="dsn">
insert into table1 values(x,y,z)
insert into table1 values(a,b,c)
</cfquery>
if you want a more specific example you will have to give more specific information.
Edit: Thanks to #SamFarmer : Newer versions of CF than I have used may prevent this
Sorry for the Necro (I'm new to the site).
You didn't mention what DB you're using. If you happen to use mySQL you can add as many records as the max heap size will allow.
I regularly insert up to ~4500 records at a time with the default heap size (but that'll depend on the amount of data you have).
INSERT INTO yourTable (x,y,z) VALUES ('a','b','c'),('d','e','f'),('g','h','i')
All DBs should do this IMO.
HTH
Use CFTRANSACTION to group multiple queries into a single unit.
Any queries executed with CFQUERY and placed between and tags are treated as a single transaction. Changes to data requested by these queries are not committed to the database until all actions within the transaction block have executed successfully. If an error occurs in a query, all changes made by previous queries within the transaction block are rolled back.
Use the ISOLATION attribute for additional control over how the database engine performs locking during the transaction.
For more information visit http://www.adobe.com/livedocs/coldfusion/5.0/CFML_Reference/Tags103.htm