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TSQL Error using Cursor to loop through sysdatabases (Syntax Error)


TSQL Error using Cursor to loop through sysdatabases (Syntax Error)

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john monroe
john monroe
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I am trying to loop through sysdatabases to get all databases that meet a naming convention and then for each one found run a select statement on another table in that database.

I am getting a syntax error on line 24: Incorrect syntax near @dataname. MSG 170 Level 15, state 1, line 24


Thanks for any help in advance.


{START SCRIPT}****************************************************************
SET QUOTED_IDENTIFIER ON

DECLARE @fillfactor varchar(2)
DECLARE @tablename varchar(30)
DECLARE @tablename_header varchar(75)
DECLARE @dataname varchar(255)
DECLARE @dataname_header varchar(75)


DECLARE datanames_cursor CURSOR FOR SELECT name FROM dbo.sysdatabases WHERE name like '%somefilter%'

Open datanames_cursor

FETCH NEXT FROM datanames_cursor INTO @dataname
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status = -2)
FETCH NEXT FROM datanames_cursor INTO @dataname
BEGIN
--PRINT @dataname
PRINT @dataname
SET @dataname = '"'+@dataname+'"'
PRINT @dataname
--USE @dataname
--SELECT UserInfo.tp_Login
--FROM Sites INNER JOIN
--UserInfo ON Sites.OwnerID = UserInfo.tp_ID

FETCH NEXT FROM datanames_cursor INTO @dataname
END

END

DEALLOCATE datanames_cursor
Koji Matsumura
Koji Matsumura
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Although nothing is returned, your script generates no syntax (or any) error.
Jeff Moden
Jeff Moden
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Line 24 is the USE statement that you currently have commented out... the operand of the USE statement cannot be a variable. You will need to use dynamic SQL.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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john monroe
john monroe
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I am not sure how to use dynamic SQL.

But I found a reference to using CURSOR that does not take an argument as input. So please tell me if there is a different way to do what I need to do.

Basically I want to use the output of dbo.sysdatabases to run a select statement in each database calling a specific table.

I cheated by creating a stored procedure in each DB and then using an INSERT to a temp table for the output of each SP and then adding that as the report. But I have to add the SP to each DB and there are hundreds of DB's. It would be much easier if I could just use each DB Name in sysdatabases as the argument.

Thanks for your help in advance.
Jeff Moden
Jeff Moden
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...and, if you have less that 250 or so databases, the following will beat the pants off your cursor Wink

--===== Declare local variables
DECLARE @SQL VARCHAR(8000) --Holds the dynamic SQL

--===== Build the dynamic SQL
SELECT @SQL = ISNULL(@SQL+' UNION ALL'+CHAR(10),'')
+ 'SELECT u.tp_Login,''' + Name + ''' FROM [' + Name + ']..Sites s INNER JOIN ['
+ Name + ']..UserInfo u ON s.OwnerID=u.tp_ID'
FROM Master.dbo.SysDatabases
WHERE Name LIKE '%somefilter%'

--===== Execute the dynamic SQL to get the result set
EXEC (@SQL)



--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
Koji Matsumura
Koji Matsumura
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Points: 315 Visits: 1918
search this forum on sp_MSforeachdb
Jeff Moden
Jeff Moden
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Koji Matsumura (11/5/2007)
search this forum on sp_MSforeachdb


Gosh... I wouldn't use that on a bet... it's got a cursor with some steroid rage going on. I suppose it's ok for the casual "what if", but I sure wouldn't use it for production code.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
john monroe
john monroe
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I forgot to mention that once I have the code running I will be using SSRS to allow users to pull updated reports. So Cursor's will not work either embedded in SP_FOREACHDB or in another location. I am going to research the dynamic SQL Option. Is there a good reference material?
john monroe
john monroe
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Thanks for all the suggestions. Turns out for this application i just had a typo error.

EXEC ('USE ' + @DataName +
'INSERT INTO #TMP1 SELECT ' + @DataName + '.dbo.Sites.FullUrl,'
+ @DataName + '.dbo.UserInfo.tp_Login
FROM ' + @DataName + '.dbo.Sites INNER JOIN
UserInfo ON ' + @DataName + '.dbo.Sites.OwnerID = '
+ @DataName + '.dbo.UserInfo.tp_ID
')

So putting in single quotes with the use statemnt fixed my problem. Just in case anyone wants to know.
Jeff Moden
Jeff Moden
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Thanks for the feedback, John...

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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