PHP-将PDO与日期字段一起使用不起作用

Question

so this has been driving me nuts for the last two hours...

    $sql = 'SELECT * FROM master_rets_table
            WHERE listing_entry_timestamp > "2014-04-01 00:00:00"
            ORDER BY listing_price DESC';
    }
$this->stm = $this->prepare($sql);
$this->stm->execute();

Running this query outside PDO in Navicat works fine ( i get 17 records), but no matter how I try to change this up, it is simply not working in PDO. I'm using this same code for lots of PDO queries that do not use a date constraint, and they all work wonderfully.

fyi, listing_entry_timestamp is a DateTime field

EDIT - here is the whole code block

if ($this->city != "" ) {
    $sql = 'SELECT * FROM master_rets_table
            WHERE city = '.$this->city.'
            ORDER BY listing_price DESC';
    }
    else if ($this->subdiv != ""){
    $sql = 'SELECT * FROM master_rets_table
            WHERE subdivision REGEXP '.$this->subdiv.'
            ORDER BY listing_price DESC';
    }
    else if ($this->date_from != "") {
    $sql = "SELECT * FROM master_rets_table WHERE (listing_entry_timestamp > '2014-04-01') ORDER BY listing_price DESC";
    }

$this->stm = $this->prepare($sql);
$this->stm->execute();

$this->rows= $this->stm->fetchAll(PDO::FETCH_ASSOC);
$this->count = $this->stm->rowCount();
$this->rowIdx = 0;

it is working fine for the other two cases...it seems to have something to do with the datetime field or something.

EDIT [SOLUTION] - Well, it turns out that the live data wasn't being pushed to the development server and i was testing it in Navicat against the live data, so the query looking for yesterday's data couldn't find anything.

Answer 1

PDO has nothing to do with date fields.
It works with dates all right.

So, look for bugs in your code/data base/environment/whatever.

My bet for the different databases. One you connect with navicat contains 17 records to match and one you connect with PDO contains nones.

Second guess is some wrong code in your db class.

What is driving me nuts is pointless suggestions with wild guesses.

OK

mysql

mysql> create table so_again(d datetime);
Query OK, 0 rows affected (0.23 sec)
mysql> insert into so_again values (now());
Query OK, 1 row affected (0.08 sec)
mysql> select * from so_again where d > '2014-04-01 00:00:00';
+---------------------+
| d                   |
+---------------------+
| 2014-04-02 00:23:16 |
+---------------------+
1 row in set (0.02 sec)

PHP

$sql = 'select * from so_again where d > "2014-04-01 00:00:00"';
$stm = $pdo->prepare($sql);
$stm->execute();
$stm = $stm->fetchAll();
var_dump($stm);

ouptut

array(1) {
  [0]=>
  array(1) {
    ["d"]=>
    string(19) "2014-04-02 00:23:16"
  }
}

It works.

at least with raw PDO.

• there is no problem with SQL
• there is no problem with PDO
• there is no problem with date
• there is no problem with quotes (as long as we take 17 returned results for granted. however, in ANSI mode they will cause an error)

There can be only problem with your own code/data/input

Answer 2

Try this:

$sql = "SELECT * FROM master_rets_table WHERE listing_entry_timestamp > :date ORDER BY listing_price DESC";
$statement = $this->prepare($sql);
$statement->bindParam (":date", "2014-04-01 00:00:00");
$statement->execute();

Answer 3

The only two things that come to my mind are that you might have some kind of casting error in the date parameter, or a logic path error. I also noticed that you treat $city as if it was a string, yet you do not quote it.

Try with:

if ($this->city != "" ) {
    $where = 'city = ?';
    $match = $this->city;
} else if ($this->subdiv != "") {
    $where = 'subdivision REGEXP ?';
    $match = $this->subdiv;
} else if ($this->date_from != "") {
    $where = 'listing_entry_timestamp > ?';
    $match = 20140401;
} else {
    trigger_error("No search", E_USER_ERROR);
}

$sql = "SELECT * FROM master_rets_table WHERE {$where} ORDER BY listing_price DESC";
$this->stm = $this->prepare($sql);
$this->stm->execute(array($match));

$this->rows  = $this->stm->fetchAll(PDO::FETCH_ASSOC);
$this->count = $this->stm->rowCount();
$this->rowIdx = 0;

This should both supply a 'recognizable' parameter to PDO and ensure that $sql is indeed populated.

Another possibility

You say,

$city is preformatted with PDO::quote()...thats an old habit of mine

If it were so, let's suppose that $this->city is initially empty.

Then PDO::quote would make it into an empty quoted string : ie a pair of quote marks with nothing inside.

Then, the comparison $this->city != "" would always return true , because city is not "", but "''".

And so the SQL would run a different query from what you'd expect.

Answer 4

can you tell me the output when you execute this modified query:

$sql = 'SELECT * FROM master_rets_table
                WHERE (listing_entry_timestamp > :entry_date)
                ORDER BY listing_price DESC';
        }
    $this->stm = $this->prepare($sql);
    $this->stm->execute(array("entry_date"=>"2014-04-01 00:00:00"));