Zend DB Framework examine query for an update
No, not directly, since Zend Framework builds and executes the SQL inside the adapter method Zend_Db_Adapter_Abstract::update:
/**
* Updates table rows with specified data based on a WHERE clause.
*
* @param mixed $table The table to update.
* @param array $bind Column-value pairs.
* @param mixed $where UPDATE WHERE clause(s).
* @return int The number of affected rows.
*/
public function update($table, array $bind, $where = '')
{
/**
* Build "col = ?" pairs for the statement,
* except for Zend_Db_Expr which is treated literally.
*/
$set = array();
foreach ($bind as $col => $val) {
if ($val instanceof Zend_Db_Expr) {
$val = $val->__toString();
unset($bind[$col]);
} else {
$val = '?';
}
$set[] = $this->quoteIdentifier($col, true) . ' = ' . $val;
}
$where = $this->_whereExpr($where);
/**
* Build the UPDATE statement
*/
$sql = "UPDATE "
. $this->quoteIdentifier($table, true)
. ' SET ' . implode(', ', $set)
. (($where) ? " WHERE $where" : '');
/**
* Execute the statement and return the number of affected rows
*/
$stmt = $this->query($sql, array_values($bind));
$result = $stmt->rowCount();
return $result;
}
You can, temporarily, insert a var_dump and exit inside this method to inspect the sql to ensure that it is correct:
/**
* Build the UPDATE statement
*/
$sql = "UPDATE "
. $this->quoteIdentifier($table, true)
. ' SET ' . implode(', ', $set)
. (($where) ? " WHERE $where" : '');
var_dump($sql); exit;
Use Zend_Db_Profiler to capture and report SQL statements:
$db->getProfiler()->setEnabled(true);
$db->update( ... );
print $db->getProfiler()->getLastQueryProfile()->getQuery();
print_r($db->getProfiler()->getLastQueryProfile()->getQueryParams());
$db->getProfiler()->setEnabled(false);
Remember to turn the profiler off if you don't need it! I talked to one fellow who thought he had a memory leak, but it was the profiler instantiating a few PHP objects for each of the millions of SQL queries he was running.
PS: You should use quoteInto()
in that query:
$n = $db->update('pages', $data, $db->quoteInto("url = ?", $content));