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
mssql_query
MSSQL_QUERY(3) MSSQL_QUERY(3)
mssql_query - Send MS SQL query
SYNOPSIS
mixed mssql_query (string $query, [resource $link_identifier], [int $batch_size])
DESCRIPTION
mssql_query(3) sends a query to the currently active database on the server that's associated with the specified link identifier.
PARAMETERS
o $query
- An SQL query.
o $link_identifier
- A MS SQL link identifier, returned by mssql_connect(3) or mssql_pconnect(3). If the link identifier isn't specified, the last
opened link is assumed. If no link is open, the function tries to establish a link as if mssql_connect(3) was called, and use it.
o $batch_size
- The number of records to batch in the buffer.
RETURN VALUES
Returns a MS SQL result resource on success, TRUE if no rows were returned, or FALSE on error.
EXAMPLES
Example #1
mssql_query(3) example
<?php
// Connect to MSSQL
$link = mssql_connect('KALLESPCSQLEXPRESS', 'sa', 'phpfi');
if (!$link || !mssql_select_db('php', $link)) {
die('Unable to connect or select database!');
}
// Do a simple query, select the version of
// MSSQL and print it.
$version = mssql_query('SELECT @@VERSION');
$row = mssql_fetch_array($version);
echo $row[0];
// Clean up
mssql_free_result($version);
?>
NOTES
Note
If the query returns multiple results then it is necessary to fetch all results by mssql_next_result(3) or free the results by
mssql_free_result(3) before executing next query.
SEE ALSO
mssql_select_db(3), mssql_connect(3).
PHP Documentation Group MSSQL_QUERY(3)