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Optionally EXPLAIN all SQL queries when in debug mode

This commit is contained in:
Michael Foster 2013-09-07 12:40:35 +10:00
parent 9ccf62bb61
commit e9ccc5d72d
2 changed files with 17 additions and 2 deletions
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2
inc/config.php
View File

@ -44,6 +44,8 @@
$config['debug'] = false; $config['debug'] = false;
// For development purposes. Displays (and "dies" on) all errors and warnings. Turn on with the above. // For development purposes. Displays (and "dies" on) all errors and warnings. Turn on with the above.
$config['verbose_errors'] = true; $config['verbose_errors'] = true;
// EXPLAIN all SQL queries (when in debug mode).
$config['debug_explain'] = false;
// Directory where temporary files will be created. // Directory where temporary files will be created.
$config['tmp'] = sys_get_temp_dir(); $config['tmp'] = sys_get_temp_dir();

17
inc/database.php
View File

@ -7,21 +7,29 @@
defined('TINYBOARD') or exit; defined('TINYBOARD') or exit;
class PreparedQueryDebug { class PreparedQueryDebug {
protected $query; protected $query, $explain_query = false;
public function __construct($query) { public function __construct($query) {
global $pdo; global $pdo, $config;
$query = preg_replace("/[\n\t]+/", ' ', $query); $query = preg_replace("/[\n\t]+/", ' ', $query);
$this->query = $pdo->prepare($query); $this->query = $pdo->prepare($query);
if ($config['debug'] && $config['debug_explain'] && preg_match('/^(SELECT|INSERT|UPDATE|DELETE) /', $query))
$this->explain_query = $pdo->prepare("EXPLAIN $query");
} }
public function __call($function, $args) { public function __call($function, $args) {
global $config, $debug; global $config, $debug;
if ($config['debug'] && $function == 'execute') { if ($config['debug'] && $function == 'execute') {
if ($this->explain_query) {
$this->explain_query->execute() or error(db_error($explain_query));
}
$start = microtime(true); $start = microtime(true);
} }
if ($this->explain_query && $function == 'bindValue')
call_user_func_array(array($this->explain_query, $function), $args);
$return = call_user_func_array(array($this->query, $function), $args); $return = call_user_func_array(array($this->query, $function), $args);
if ($config['debug'] && $function == 'execute') { if ($config['debug'] && $function == 'execute') {
@ -29,6 +37,7 @@ class PreparedQueryDebug {
$debug['sql'][] = array( $debug['sql'][] = array(
'query' => $this->query->queryString, 'query' => $this->query->queryString,
'rows' => $this->query->rowCount(), 'rows' => $this->query->rowCount(),
'explain' => $this->explain_query ? $this->explain_query->fetchAll(PDO::FETCH_ASSOC) : null,
'time' => '~' . round($time * 1000, 2) . 'ms' 'time' => '~' . round($time * 1000, 2) . 'ms'
); );
$debug['time']['db_queries'] += $time; $debug['time']['db_queries'] += $time;
@ -118,6 +127,9 @@ function query($query) {
sql_open(); sql_open();
if ($config['debug']) { if ($config['debug']) {
if ($config['debug_explain'] && preg_match('/^(SELECT|INSERT|UPDATE|DELETE) /', $query)) {
$explain = $pdo->query("EXPLAIN $query") or error(db_error());
}
$start = microtime(true); $start = microtime(true);
$query = $pdo->query($query); $query = $pdo->query($query);
if (!$query) if (!$query)
@ -126,6 +138,7 @@ function query($query) {
$debug['sql'][] = array( $debug['sql'][] = array(
'query' => $query->queryString, 'query' => $query->queryString,
'rows' => $query->rowCount(), 'rows' => $query->rowCount(),
'explain' => isset($explain) ? $explain->fetchAll(PDO::FETCH_ASSOC) : null,
'time' => '~' . round($time * 1000, 2) . 'ms' 'time' => '~' . round($time * 1000, 2) . 'ms'
); );
$debug['time']['db_queries'] += $time; $debug['time']['db_queries'] += $time;