08-03-2007
Quote:
Originally Posted by
jim mcnamara
rowid is not an indexed column - it is a "pseudocolumn'. the in () subselect will read thru the entire select statement's result set each time. When I get back in a while I'll write something that is faster. You may need to add an index.
Does that mean its executing in this fashion.
rowid <1> - evaluate sub query
rowid <2> - evaluate sub query
.
.
.
rowid <n> - evaluate sub query
Last edited by reborg; 08-03-2007 at 03:29 PM..
Reason: touch post to fix quotes
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LEARN ABOUT PHP
cubrid_unbuffered_query
CUBRID_UNBUFFERED_QUERY(3) 1 CUBRID_UNBUFFERED_QUERY(3)
cubrid_unbuffered_query - Perform a query without fetching the results into memory
SYNOPSIS
resource cubrid_unbuffered_query (string $query, [resource $conn_identifier])
DESCRIPTION
This function performs a query without waiting for that all query results have been complete. It will return when the results are being
generated.
PARAMETERS
o $query
-A SQL query.
o $conn_identifier
-The CUBRID connection. If the connection identifier is not specified, the last connection opened by cubrid_connect(3) is assumed.
RETURN VALUES
For SELECT, SHOW, DESCRIBE or EXPLAIN statements returns a request identifier resource on success.
For other type of SQL statements, UPDATE, DELETE, DROP, etc, returns TRUE on success.
FALSE on failure.
NOTES
Note
The benefits of cubrid_unbuffered_query(3) come at a cost: you cannot use cubrid_num_rows(3) and cubrid_data_seek(3) on a result
set returned from cubrid_unbuffered_query(3).
EXAMPLES
Example #1
cubrid_unbuffered_query(3) example
<?php
$link = cubrid_connect("localhost", 30000, "demodb", "dba", "");
if (!$link)
{
die('Could not connect.');
}
$query = "select * from code";
$result = cubrid_unbuffered_query($query, $link);
while ($row = cubrid_fetch($result))
{
var_dump($row);
}
cubrid_close_request($result);
cubrid_disconnect($link);
?>
PHP Documentation Group CUBRID_UNBUFFERED_QUERY(3)