From bc8c2c57880523472b30f475d566a8133e2d2e20 Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Sat, 21 May 2011 14:04:51 -0400
Subject: [PATCH] - Fix s/pattern/prefix/ in clear_cache()
---
program/include/rcube_mdb2.php | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 52 insertions(+), 2 deletions(-)
diff --git a/program/include/rcube_mdb2.php b/program/include/rcube_mdb2.php
index b25938b..75764c4 100644
--- a/program/include/rcube_mdb2.php
+++ b/program/include/rcube_mdb2.php
@@ -44,6 +44,7 @@
var $db_error_msg = '';
private $debug_mode = false;
+ private $write_failure = false;
private $a_query_results = array('dummy');
private $last_res_id = 0;
private $tables;
@@ -124,7 +125,7 @@
// Already connected
if ($this->db_connected) {
// connected to read-write db, current connection is ok
- if ($this->db_mode == 'w')
+ if ($this->db_mode == 'w' && !$this->write_failure)
return;
// no replication, current connection is ok for read and write
@@ -189,6 +190,16 @@
/**
+ * Is database replication configured?
+ * This returns true if dsnw != dsnr
+ */
+ function is_replicated()
+ {
+ return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr;
+ }
+
+
+ /**
* Execute a SQL query
*
* @param string SQL query to execute
@@ -245,6 +256,10 @@
// Read or write ?
$mode = (strtolower(substr(trim($query),0,6)) == 'select') ? 'r' : 'w';
+ // don't event attempt to connect if previous write-operation failed
+ if ($this->write_failure && $mode == 'w')
+ return false;
+
$this->db_connect($mode);
// check connection before proceeding
@@ -277,6 +292,10 @@
$q->free();
}
}
+
+ // remember that write-operation failed
+ if ($mode == 'w' && ($result === false || PEAR::isError($result)))
+ $this->write_failure = true;
// add result, even if it's an error
return $this->_add_result($result);
@@ -545,9 +564,12 @@
/**
* Return SQL statement to convert a field value into a unix timestamp
*
+ * This method is deprecated and should not be used anymore due to limitations
+ * of timestamp functions in Mysql (year 2038 problem)
+ *
* @param string $field Field name
* @return string SQL statement to use in query
- * @access public
+ * @deprecated
*/
function unixtimestamp($field)
{
@@ -597,6 +619,34 @@
}
}
+ /**
+ * Abstract SQL statement for value concatenation
+ *
+ * @return string SQL statement to be used in query
+ * @access public
+ */
+ function concat(/* col1, col2, ... */)
+ {
+ $func = '';
+ $args = func_get_args();
+
+ switch($this->db_provider) {
+ case 'mysql':
+ case 'mysqli':
+ $func = 'CONCAT';
+ $delim = ', ';
+ break;
+ case 'mssql':
+ case 'sqlsrv':
+ $delim = ' + ';
+ break;
+ default:
+ $delim = ' || ';
+ }
+
+ return $func . '(' . join($delim, $args) . ')';
+ }
+
/**
* Encodes non-UTF-8 characters in string/array/object (recursive)
--
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