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<?php
abstract class dbeng_pdo extends dbeng_abs {
/**
* We don't want to rewrite all queries, so a small parser is written
* which rewrites the queries. Ugly, but it works.
*
* @param string $s
* @param array $p
* @return PDOStatement
*/
public function prepareSql($s, $p) {
if (empty($p)) {
return $this->_conn->prepare($s);
} # if
$pattern = '/(\'?\%[dsb]\'?)/';
$matches = array();
preg_match_all($pattern, $s, $matches);
$s = preg_replace($pattern, '?', $s);
$stmt = $this->_conn->prepare($s);
$idx=1;
$totalCount = count($p);
foreach ($matches[1] as $m) {
if ($idx > ($totalCount+1)) {
break;
} # if
if (is_null($p[$idx-1])) {
$stmt->bindValue($idx, null, PDO::PARAM_NULL);
} else {
switch ($m) {
case '%d': {
# We convet explicitly to strval because PDO changes a zero to an ''
$p[$idx-1] = strval($p[$idx-1]);
$stmt->bindParam($idx, $p[$idx-1], PDO::PARAM_INT);
break;
}
case "'%b'": {
$stmt->bindParam($idx, $p[$idx-1], PDO::PARAM_LOB);
break;
}
default: {
$stmt->bindParam($idx, $p[$idx-1], PDO::PARAM_STR);
}
}
}
$idx++;
}
if (!$stmt instanceof PDOStatement) {
throw new Exception(print_r($stmt, true));
}
return $stmt;
}
public function rawExec($s) {
SpotTiming::start(__FUNCTION__);
try {
$stmt = $this->_conn->query($s);
} catch(PDOException $x) {
throw new SqlErrorException( $x->errorInfo[0] . ': ' . $x->errorInfo[2], -1);
} # catch
SpotTiming::stop(__FUNCTION__,array($s));
return $stmt;
}
/*
* Returns a database specific representation of a boolean value
*/
function bool2dt($b) {
if ($b) {
return '1';
} # if
return '0';
} # bool2dt
/**
* Execute the query and saves the rowcount in a property for later retrieval
*
* @param string $s
* @param array $p
* @return PDOStatement
*/
public function exec($s, $p = array()) {
SpotTiming::start(__FUNCTION__);
try {
$stmt = $this->prepareSql($s, $p);
$stmt->execute();
} catch(PDOException $x) {
throw new SqlErrorException( $x->errorInfo[0] . ': ' . $x->errorInfo[2], -1);
} # catch
$this->_rows_changed = $stmt->rowCount();
SpotTiming::stop(__FUNCTION__, array($s, $p));
return $stmt;
}
/*
* INSERT or UPDATE statement, doesn't return anything. Exception
* thrown if a error occurs
*/
function modify($s, $p = array()) {
SpotTiming::start(__FUNCTION__);
$res = $this->exec($s, $p);
$res->closeCursor();
unset($res);
SpotTiming::stop(__FUNCTION__, array($s,$p));
} # modify
/*
* Begins an transaction
*/
function beginTransaction() {
$this->_conn->beginTransaction();
} # beginTransaction
/*
* Commits an transaction
*/
function commit() {
$this->_conn->commit();
} # commit
/*
* Rolls back an transaction
*/
function rollback() {
$this->_conn->rollback();
} # rollback
function rows() {
return $this->_rows_changed;
} # rows()
function lastInsertId($tableName) {
return $this->_conn->lastInsertId($tableName . "_id_seq");
} # lastInsertId
/**
* Executes the query with $params as parameters. All parameters are
* parsed through sthe safe() function to prevent SQL injection.
*
* Returns a single associative array when query succeeds, returns
* an exception when the query fails.
*
* @param array $s
* @param array $p
* @return array
*/
function singleQuery($s, $p = array()) {
SpotTiming::start(__FUNCTION__);
$stmt = $this->exec($s, $p);
$row = $stmt->fetch();
$stmt->closeCursor();
unset($stmt);
SpotTiming::stop(__FUNCTION__, array($s,$p));
return $row[0];
} # singleQuery
/**
* Executes the query with $params as parameters. All parameters are
* parsed through sthe safe() function to prevent SQL injection.
*
*
* Returns an array of associative arrays when query succeeds, returns
* an exception when the query fails.
*
* @param string $s
* @param array $p
* @return array
*/
function arrayQuery($s, $p = array()) {
SpotTiming::start(__FUNCTION__);
$stmt = $this->exec($s, $p);
$tmpArray = $stmt->fetchAll();
$stmt->closeCursor();
unset($stmt);
SpotTiming::stop(__FUNCTION__, array($s,$p));
return $tmpArray;
} # arrayQuery
} # class
|
