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Top Forums UNIX for Advanced & Expert Users Connecting once using sqlplus and doing multiple queries Post 302445279 by edlin_r on Sunday 15th of August 2010 03:55:58 AM
Old 08-15-2010
Data Connecting once using sqlplus and doing multiple queries

Hello everyone,

It's my first week using unix and shell scripting. I tried creating a script that has a function that execute SQL query. my script looks something like this:

----------------------------------------------------

Code:
#!/bin/sh
 
tableName="myTable"
secondTable="secondTable"
 
myFunction()
{
myQuery=`sqlplus -s usr/pass << EOF
set heading off
SELECT COUNT(*) FROM $tableName WHERE <condition>;
EOF`
if [ $myQuery = '0' ]; then
myQuery=`sqlplus -s usr/pass << EOF
set heading off
SELECT COUNT(*) FROM $secondTable WHERE <condition>;
EOF`
fi
return $myQuery
}
 
myFunction
output=`echo $?`

----------------------------------------------------

Correct me if I'm wrong, but I believe that if I always use the "sqlplus -s usr/pass" statement everytime I need a record query, It would slow down my processing.. I have to call this function about 5000 times (need to query 5000 times to check record).

how can I execute multiple queries (select) without being redundant on the ''sqlplus -s....'' statement?

Please help me. Thank you.

Last edited by pludi; 08-15-2010 at 08:54 AM.. Reason: code tags, please...
 

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OCI_SET_CLIENT_INFO(3)													    OCI_SET_CLIENT_INFO(3)

oci_set_client_info - Sets the client information

SYNOPSIS
bool oci_set_client_info (resource $connection, string $client_info) DESCRIPTION
Sets the client information for Oracle tracing. The client information is registered with the database when the next 'roundtrip' from PHP to the database occurs, typically when an SQL statement is executed. The client information can subsequently be queried from database administration views such as V$SESSION. The value may be retained across persistent connections. PARAMETERS
o $connection -An Oracle connection identifier, returned by oci_connect(3), oci_pconnect(3), or oci_new_connect(3). o $client_info - User chosen string up to 64 bytes long. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Setting the client information <?php $c = oci_connect('hr', 'welcome', 'localhost/XE'); // Record the client information oci_set_client_info($c, 'My Application Version 2'); // Code that causes a roundtrip, for example a query: $s = oci_parse($c, 'select * from dual'); oci_execute($s); oci_fetch_all($s, $res); sleep(30); ?> // While the script is running, the administrator can see the client // information: sqlplus system/welcome SQL> select client_info from v$session; NOTES
Note Oracle version requirement This function is available when PHP is linked with Oracle Database libraries from version 10 g onwards. Tip Performance With older versions of OCI8 or the Oracle Database, the client information can be set using the Oracle DBMS_APPLICATION_INFO pack- age. This is less efficient than using oci_set_client_info(3). Caution Roundtrip Gotcha Some but not all OCI8 functions cause roundtrips. Roundtrips to the database may not occur with queries when result caching is enabled. SEE ALSO
oci_set_module_name(3), oci_set_action(3), oci_set_client_identifier(3). PHP Documentation Group OCI_SET_CLIENT_INFO(3)
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