I have an "UPDATE" query and I want to check if this query has affected any rows and if it has I would like to send an email to myself. I'm not really experienced with perl or sql. (I'm using postgresql).
EDIT: I know that UPDATE returns "count" which tells how many rows if any have been updated, but I still don't know how to get to it.
The code looks like this:
my $updateQuery - //UPDATE query
if(//updateQuery has effected rows){
//send mail
}else
//do nothing
The problem is I don't know what to put into the if, what flag should I set? Is there any easy check that answers "has effected rows"?
Shortcut version using do()
my $update_query = '...';
my $ret = $dbh->do($update_query);
if ($ret) {
if ($ret eq '0E0') {
# no rows updated
} else {
# rows updated
}
} else {
# error
}
Full prepare()/execute() version.
my $update_query = '...';
my $sth = $dbh->prepare($update_query);
my $ret = $sth->execute;
if ($ret) {
if ($ret eq '0E0') {
# no rows updated
} else {
# rows updated
}
} else {
# error
}
Related
I currently have something along the lines of
transaction {
FooTable.deleteWhere { FooTable.BarId eq 1 }
}
I want to see how many rows that it successfully deleted (I really just want to make sure there was an entry before and was deleted). Any ideas on how I can do that?
Try this:
transaction {
var numberOfDeletedItems = FooTable.deleteWhere { FooTable.BarId eq 1 }
}
I need to use a variable from SQL. I can print which I wrote the variable. But I can't use
it when it out of while query.
Here is the SQL:
if ($result = $mysqli->query("SELECT * FROM organize WHERE organize.nid=$nid"))
{
// display records if there are records to display
if ($result->num_rows > 0)
{
while ($row = $result->fetch_object())
{
echo $row->nid;
echo $row->omid;
$id=$row->omid;
}
}
// if there are no records in the database, display an alert message
else
{
echo "No results to display!";
}
}
// show an error if there is an issue with the database query
else
{
echo "Error: " . $mysqli->error;
}
And the header under this scripts.
header("Refresh: 10;http://localhost/records.php?mid= $id ");
I know this is not right way. But I show you what I want. Need to use that 'omid' in header inseat of '$id'.
Finally I resolved it. This scripts like the above codes. I didn't understand why It didn't work. Maybe because I should not use
echo $row->nid;
echo $row->omid;
or
$id=$row->omid;
The right usage is as follows:
while ($row = $result->fetch_object())
{
$dd=$row->omid;
}
header("Refresh: 2;http://localhost/records.php?mid= $dd");
In sql we can do something like this:
INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9);
Is there any way to do multiple/bulk/batch inserts or updates in Slick?
Can we do something similar, at least using SQL plain queries ?
For inserts, as Andrew answered, you use insertALL.
def insertAll(items:Seq[MyCaseClass])(implicit session:Session) = {
(items.size) match {
case s if s > 0 =>
try {
// basequery is the tablequery object
baseQuery.insertAll(tempItems :_*)
} catch {
case e:Exception => e.printStackTrace()
}
Some(tempItems(0))
case _ => None
}
}
For updates, you're SOL. Check out Scala slick 2.0 updateAll equivalent to insertALL? for what I ended up doing. To paraphrase, here's the code:
private def batchUpdateQuery = "update table set value = ? where id = ?"
/**
* Dropping to jdbc b/c slick doesnt support this batched update
*/
def batchUpate(batch:List[MyCaseClass])(implicit session:Session) = {
val pstmt = session.conn.prepareStatement(batchUpdateQuery)
batch map { myCaseClass =>
pstmt.setString(1, myCaseClass.value)
pstmt.setString(2, myCaseClass.id)
pstmt.addBatch()
}
session.withTransaction {
pstmt.executeBatch()
}
}
In Slick, you are able to use the insertAll method for a Table. An example of insertAll is given in the Getting Started page on Slick's website.
http://slick.typesafe.com/doc/0.11.1/gettingstarted.html
I changed this login script to PDO. Now it passes the username but get's stuck fetchAll line. I need help please. thanks
<?php
session_start();
include_once"includes/config.php";
if (isset($_POST['admin_login'])) {
$admin_user = trim($_POST['admin_user']);
$admin_pw = trim($_POST['admin_pw']);
if ($admin_user == NULL OR $admin_pw == NULL) {
$final_report.="Please complete all the fields below..";
} else {
$check_user_data = $db->prepare("SELECT * FROM `admin`
WHERE `admin_user`='$admin_user'");
$check_user_data->execute();
if ($check_user_data->fetchColumn() == 0) {
$final_report.="This admin username does not exist..";
} else {
$get_user_data = $check_user_data->fetchAll($check_user_data);
if ($get_user_data['admin_pw'] == $admin_pw) {
$start_idsess = $_SESSION['admin_user'] = "".$get_user_data['admin_user']."";
$start_passsess = $_SESSION['admin_pw'] = "".$get_user_data['admin_pw']."";
$final_report.="You are about to be logged in, please wait a few moments...";
header('Location: admin.php');
}
}
}
}
?>
Not checking return value prepare() or execute() for false. You need to check for SQL errors and handle them, stopping the code instead of continuing on blithely.
Not using query parameters in the prepared statement, still interpolating $_POST content into the query unsafely. You're missing the benefit of switching to PDO, and leaving yourself vulnerable to SQL injection attack.
You're storing passwords in plaintext, which is unsafe. See You're Probably Storing Passwords Incorrectly.
Do you really need to SELECT * if you only use the admin_pw column? Hint: no.
PDOStatement::fetchAll() returns an array of arrays, not just one array for a row. Read the examples in the documentation for fetchAll().
I am working on a backend edit page for my custom entity. I have almost everything working, including saving a bunch of different text fields. I have a problem, though, when trying to set the value of a boolean field.
I have tried:
$landingPage->setEnabled(1);
$landingPage->setEnabled(TRUE);
$landingPage->setEnabled(0);
$landingPage->setEnabled(FALSE);
None seem to persist a change to my database.
How are you supposed to set a boolean field using magento ORM?
edit
Looking at my database, mysql is storing the field as a tinyint(1), so magento may be seeing this as an int not a bool. Still can't get it to set though.
This topic has bring curiosity to me. Although it has been answered, I'd like to share what I've found though I didn't do intense tracing.
It doesn't matter whether the cache is enabled / disabled, the table schema will be cached.
It will be cached during save process.
Mage_Core_Model_Abstract -> save()
Mage_Core_Model_Resource_Db_Abstract -> save(Mage_Core_Model_Abstract $object)
Mage_Core_Model_Resource_Db_Abstract
public function save(Mage_Core_Model_Abstract $object)
{
...
//any conditional will eventually call for:
$this->_prepareDataForSave($object);
...
}
protected function _prepareDataForSave(Mage_Core_Model_Abstract $object)
{
return $this->_prepareDataForTable($object, $this->getMainTable());
}
Mage_Core_Model_Resource_Abstract
protected function _prepareDataForTable(Varien_Object $object, $table)
{
$data = array();
$fields = $this->_getWriteAdapter()->describeTable($table);
foreach (array_keys($fields) as $field) {
if ($object->hasData($field)) {
$fieldValue = $object->getData($field);
if ($fieldValue instanceof Zend_Db_Expr) {
$data[$field] = $fieldValue;
} else {
if (null !== $fieldValue) {
$fieldValue = $this->_prepareTableValueForSave($fieldValue, $fields[$field]['DATA_TYPE']);
$data[$field] = $this->_getWriteAdapter()->prepareColumnValue($fields[$field], $fieldValue);
} else if (!empty($fields[$field]['NULLABLE'])) {
$data[$field] = null;
}
}
}
}
return $data;
}
See the line: $fields = $this->_getWriteAdapter()->describeTable($table);
Varien_Db_Adapter_Pdo_Mysql
public function describeTable($tableName, $schemaName = null)
{
$cacheKey = $this->_getTableName($tableName, $schemaName);
$ddl = $this->loadDdlCache($cacheKey, self::DDL_DESCRIBE);
if ($ddl === false) {
$ddl = parent::describeTable($tableName, $schemaName);
/**
* Remove bug in some MySQL versions, when int-column without default value is described as:
* having default empty string value
*/
$affected = array('tinyint', 'smallint', 'mediumint', 'int', 'bigint');
foreach ($ddl as $key => $columnData) {
if (($columnData['DEFAULT'] === '') && (array_search($columnData['DATA_TYPE'], $affected) !== FALSE)) {
$ddl[$key]['DEFAULT'] = null;
}
}
$this->saveDdlCache($cacheKey, self::DDL_DESCRIBE, $ddl);
}
return $ddl;
}
As we can see:
$ddl = $this->loadDdlCache($cacheKey, self::DDL_DESCRIBE);
will try to load the schema from cache.
If the value is not exists: if ($ddl === false)
it will create one: $this->saveDdlCache($cacheKey, self::DDL_DESCRIBE, $ddl);
So the problem that occurred in this question will be happened if we ever save the model that is going to be altered (add column, etc).
Because it has ever been $model->save(), the schema will be cached.
Later after he add new column and "do saving", it will load the schema from cache (which is not containing the new column) and resulting as: the data for new column is failed to be saved in database
Delete var/cache/* - your DB schema is cached by Magento even though the new column is already added to the MySQL table.