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ODBC Multiple Database connections

Posted on 2008-10-09
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Last Modified: 2012-08-13
HI,

I have executed a query to an odbc souce and within this query I am trying to loop another query to the same database but looking at different tables but it errors when it tries to use the second query.

I am using a different connection as shown below, but it will not work.

$connect = odbc_connect("FreeTDS", "odbcadm", "");
    Perform  Query
    Loop
        $connect2 = odbc_connect("FreeTDS", "odbcadm", "");
        Perform second query
        odbc_close($connect2);
    End the loop
The second query never gets executed and errors occur as the first result set appears to be lost

Thanks for any help.
   

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Question by:RICHARDH
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4 Comments
 
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Expert Comment

by:Marcus Bointon
ID: 22685516
You don't need to open a second connection to execute a second query. just issue a second query and you'll get a second result set, which shouldn't interfere with your first one. The only time I've needed multiple connections is when I want to post updates about a transaction that has not yet committed in another connection.
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Author Comment

by:RICHARDH
ID: 22685903
HI,

Thanks for that but I am afraid that does not work either, I had tried that first as that seemed the logical approach. As soon as I try to create the second query I get the result shown below\:

Warning: odbc_exec() [function.odbc-exec]: SQL error: , SQL state p*(p*( in SQLExecDirect

Thanks for the help.

Regards
Richard
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Accepted Solution

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Marcus Bointon earned 125 total points
ID: 22686037
OK, in that case I guess your only option is to extract all the data from the first query, then free it and issue the second one, rather than nesting them. Alternatively, do a join that gives you both result sets together (that will usually be faster - nested queries can get very slow).
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