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Code Issues Releases Wiki Activity

added conditional SQL

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This commit is contained in:
David Grudl
2006-06-07 19:02:24 +00:00
parent 0951ea574c
commit a3a17f1c55
4 changed files with 128 additions and 35 deletions
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5
dibi/dibi.php
View File

@@ -18,7 +18,7 @@
*/
define('DIBI', 'Version 0.5b $Revision$');
define('DIBI', 'Version 0.6 $Revision$');
if (version_compare(PHP_VERSION , '5.0.3', '<'))
@@ -277,6 +277,7 @@ class dibi
}
/* CURRENTLY DISABLED - try conditional SQL %if ... %else ... %end
static public function queryStart()
{
self::$query = func_get_args();
@@ -288,7 +289,7 @@ class dibi
$args = func_get_args();
self::$query = array_merge(self::$query, $args);
}
*/
/**

86
dibi/libs/parser.php
View File

@@ -41,31 +41,32 @@ class DibiParser
*/
public function parse($driver, $args)
{
$sql = '';
$this->driver = $driver;
$this->modifier = false;
$mod = & $this->modifier; // shortcut
$mod = false;
$this->hasError = false;
$command = null;
//$lastString = null;
foreach ($args as $index => $arg) {
$sql .= ' '; // always add simple space
// conditional sql
static $condKeys = array('if'=>1, 'else'=>1, 'end'=>1);
$cond = true;
$conds = array();
// iterate
$sql = array();
$count = count($args);
$i= -1;
while (++$i < $count) {
$arg = $args[$i];
// simple string means SQL
if (is_string($arg) && !$this->modifier) {
// double string warning
// (problematic with dibi::queryStart & dibi::queryAdd
// if ($lastString === $index-1)
// trigger_error("Is seems there is error in SQL near '$arg'.", E_USER_WARNING);
// $lastString = $index;
if (is_string($arg) && !$mod) {
// speed-up - is regexp required?
$toSkip = strcspn($arg, '`[\'"%');
if ($toSkip == strlen($arg)) {
$sql .= $arg;
} else {
$sql .= substr($arg, 0, $toSkip)
if ($toSkip != strlen($arg)) // need be translated?
$arg = substr($arg, 0, $toSkip)
. preg_replace_callback('/
(?=`|\[|\'|"|%) ## speed-up
(?:
@@ -73,35 +74,70 @@ class DibiParser
\[(.+?)\]| ## 2) [identifier]
(\')((?:\'\'|[^\'])*)\'| ## 3,4) string
(")((?:""|[^"])*)"| ## 5,6) "string"
%([a-zA-Z])$| ## 7) right modifier
%([a-zA-Z]{1,4})$| ## 7) right modifier
(\'|") ## 8) lone-quote
)/xs',
array($this, 'callback'),
substr($arg, $toSkip)
);
}
);
// add to SQL
if ($cond) $sql[] = $arg;
// conditional sequence
if (isset($condKeys[$mod])) {
switch ($mod) {
case 'if':
$conds[] = $cond;
$cond = (bool) $args[++$i];
break;
case 'else':
if ($conds) {
$cond = !$cond;
break;
}
// no break!
case 'end':
if ($conds) {
$cond = array_pop($conds);
break;
}
$this->hasError = true;
$sql[] = "**Unexpected condition $mod**";
} // switch
$mod = false;
} // if cond comments
continue;
}
}
// conditional sql (!!! or not?)
if (!$cond) continue;
// array processing without modifier - autoselect between SET or VALUES
if (is_array($arg) && !$this->modifier && is_string(key($arg))) {
if (is_array($arg) && !$mod && is_string(key($arg))) {
if (!$command)
$command = strtoupper(substr(ltrim($args[0]), 0, 6));
$this->modifier = ($command == 'INSERT' || $command == 'REPLAC') ? 'V' : 'S';
$mod = ($command == 'INSERT' || $command == 'REPLAC') ? 'V' : 'S';
}
// default processing
$sql .= $this->formatValue($arg, $this->modifier);
$this->modifier = false;
$sql[] = $this->formatValue($arg, $mod);
$mod = false;
} // for
$sql = implode(' ', $sql);
if ($this->hasError)
return new DibiException('Errors during generating SQL', array('sql' => $sql));
return trim($sql);
return $sql;
}
@@ -145,7 +181,7 @@ class DibiParser
// with modifier procession
if ($modifier) {
if ($value instanceof IDibiVariable)
return $value->toSql($this->driver, $this->modifier);
return $value->toSql($this->driver, $modifier);
if (!is_scalar($value) && !is_null($value)) { // array is already processed
$this->hasError = true;