Procedure expects parameter 'command_string' of type 'varchar'

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Procedure expects parameter 'command_string' of type 'varchar'

elham_azizi_62

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Points: 5095
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January 21, 2013 at 4:53 am

#288192

hello all.
I used this procedure for export to xml file:
alter PROC makeXML
AS
DECLARE @myXml xml,@SQL nvarchar(max)
SET @myXml = (SELECT * FROM QMS_QmsBase FOR XML AUTO)
SET @sql= 'bcp "exec @myXml" QUERY OUT f:\azizi\filename.xml -w -r -t -SNik-Azizi -T'
EXEC Master..xp_CmdShell @sql
but get this error:
Procedure expects parameter 'command_string' of type 'varchar'
how to solve this error?thanks

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Ant-Green SSC Guru Points: 113509 More actions · Answer 1

change @sql to varchar(max) instead of nvarchar(max)

Also dont use *, you should use the columns names.

Also on that remeber that * is a CMD wildcard like % is in SQL so even more reason to use column names just incase it throws a wobbler at you.

elham_azizi_62 SSCertifiable Points: 5095 More actions · Answer 2

thank you for your reply,

i use your note but get the same error:crying:

Ant-Green SSC Guru Points: 113509 More actions · Answer 3

Missed one thing, the MyXML variable will need to be varchar too

SO you might as well just do the following

DECLARE @sql varchar(max)

SET @sql= 'bcp "SELECT column_names FROM QMS_QmsBase FOR XML AUTO" QUERY OUT f:\azizi\filename.xml -w -r -t -SNik-Azizi -T'

EXEC Master..xp_CmdShell @sql

elham_azizi_62 SSCertifiable Points: 5095 More actions · Answer 4

i use this:

alter PROC makeXML

AS

DECLARE @myXml xml,@SQL varchar(max)

SET @myXml = (SELECT QMS_QmsBaseName FROM QMS_QmsBase FOR XML AUTO)

--SET @sql= 'bcp "exec @myXml" QUERY OUT f:\azizi\filename.xml -w -r -t -SNik-Azizi -T'

EXEC Master..xp_CmdShell 'bcp "exec @myXml" QUERY OUT f:\azizi\filename.xml -w -r -t -SNik-Azizi -T'

--exec makeXML

and solve previouse error but sp doesnot work and result of its:

Copy direction must be either 'in', 'out' or 'format'.

usage: bcp {dbtable | query} {in | out | queryout | format} datafile

[-m maxerrors] [-f formatfile] [-e errfile]

[-F firstrow] [-L lastrow] [-b batchsize]

[-n native type] [-c character type] [-w wide character type]

[-N keep non-text native] [-V file format version] [-q quoted identifier]

[-C code page specifier] [-t field terminator] [-r row terminator]

[-i inputfile] [-o outfile] [-a packetsize]

[-S server name] [-U username] [-P password]

[-T trusted connection] [-v version] [-R regional enable]

[-k keep null values] [-E keep identity values]

[-h "load hints"] [-x generate xml format file]

[-d database name]

NULL

now.how do i do?

Ant-Green SSC Guru Points: 113509 More actions · Answer 5

Well if MyXML is already the output you want to pump out to a file, you dont need to exec it, you need to select it as there will be nothing to execute.

Query Out is one word not two, QUERYOUT