02-20-2019
Quote:
Originally Posted by
figaro
I have a big, ugly query which is quadratic in the input size and therefore want to display an approximate completion time prior to sending it off:
I don't see the link between what you want and the query and like you have said it's not correct. So, to analyze the query you have the explain command to get information about the plan that will be used and from there you can estimate quick query and slow query.
See the official web site for "EXPLAIN"
The other option is to do it on the application side.
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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)