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No more MySQL errors when using db_Table_exists(). Install now saving preferences in a better way.

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This commit is contained in:
CaMer0n
2009-09-05 12:48:28 +00:00
parent 3833516dea
commit f4213f077c
2 changed files with 33 additions and 17 deletions
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37
e107_handlers/mysql_class.php
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@@ -9,8 +9,8 @@
* mySQL Handler
*
* $Source: /cvs_backup/e107_0.8/e107_handlers/mysql_class.php,v $
* $Revision: 1.44 $
* $Date: 2009-09-04 01:17:21 $
* $Revision: 1.45 $
* $Date: 2009-09-05 12:48:28 $
* $Author: e107coders $
*/
@@ -61,7 +61,7 @@ $db_ConnectionID = NULL; // Stores ID for the first DB connection used - which s
* MySQL Abstraction class
*
* @package e107
* @version $Revision: 1.44 $
* @version $Revision: 1.45 $
* @author $Author: e107coders $
*/
class db {
@@ -81,6 +81,7 @@ class db {
var $mySQLlanguage;
var $mySQLinfo;
var $tabset;
private $mySQLtableList = array();
/**
* @public MySQL Charset
@@ -1146,20 +1147,34 @@ class db {
}
/*
/**
* Verify whether a table exists, without causing an error
*
* @param string $table
* @return string
* @param string $table Table name without the prefix
* @return boolean TRUE if exists, FALSE if it doesn't
*
* NOTES: the 'official' way to do this uses SHOW TABLE STATUS, but that is 20x slower!
* LIMIT 0 is 3x slower than LIMIT 1
* NOTES: Slower (28ms) than "SELECT 1 FROM" (4-5ms), but doesn't produce MySQL errors.
* Multiple checks on a single page will only use 1 query. ie. faster on multiple calls.
*/
function db_Table_exists($table)
{
$res = $this->db_Query("SELECT 1 FROM ".$this->mySQLPrefix.$table." LIMIT 1"); // error if not there
if ($res) return TRUE;
return FALSE;
if(!$this->mySQLtableList)
{
$res = $this->db_Query("SHOW TABLES LIKE '".$this->mySQLPrefix."%' "); // error if not there
while($rows = $this->db_Fetch(MYSQL_BOTH))
{
$this->mySQLtableList[] = $rows[0];
}
}
if(!in_array($this->mySQLPrefix.$table,$this->mySQLtableList))
{
return FALSE;
}
else
{
return TRUE;
}
}