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- Avoid creating backups that we can't restore :)

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git-svn-id: file:///svn/phpbb/trunk@7141 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
David M 2007-03-07 03:27:20 +00:00
parent 484946e0d7
commit 51b2105b0b
1 changed files with 88 additions and 22 deletions
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110
phpBB/includes/acp/acp_database.php
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@ -625,23 +625,25 @@ class mysql_extractor extends base_extractor
{
$field_set[] = $field[$j]->name;
}
$search = array("\\", "'", "\x00", "\x0a", "\x0d", "\x1a", '"');
$replace = array("\\\\", "\\'", '\0', '\n', '\r', '\Z', '\\"');
$fields = implode(', ', $field_set);
$sql_data = 'INSERT INTO ' . $table_name . ' (' . $fields . ') VALUES ';
$first_set = true;
$query_len = 0;
$max_len = get_usable_memory();
while ($row = mysqli_fetch_row($result))
{
$values = array();
if ($first_set)
{
$sql_data .= '(';
$query = $sql_data . '(';
}
else
{
$sql_data .= ',(';
$query .= ',(';
}
for ($j = 0; $j < $fields_cnt; $j++)
@ -659,18 +661,27 @@ class mysql_extractor extends base_extractor
$values[$j] = "'" . str_replace($search, $replace, $row[$j]) . "'";
}
}
$sql_data .= implode(', ', $values) . ')';
$query .= implode(', ', $values) . ')';
$this->flush($sql_data);
$sql_data = '';
$first_set = false;
$query_len += strlen($query);
if ($query_len > $max_len)
{
$this->flush($query . ";\n\n");
$query = '';
$query_len = 0;
$first_set = true;
}
else
{
$first_set = false;
}
}
mysqli_free_result($result);
if (!$first_set)
// check to make sure we have nothing left to flush
if (!$first_set && $query)
{
$this->flush(";\n\n");
$this->flush($query . ";\n\n");
}
}
}
@ -702,20 +713,21 @@ class mysql_extractor extends base_extractor
$search = array("\\", "'", "\x00", "\x0a", "\x0d", "\x1a", '"');
$replace = array("\\\\", "\\'", '\0', '\n', '\r', '\Z', '\\"');
$fields = implode(', ', $field_set);
$sql_data = 'INSERT INTO ' . $table_name . ' (' . $fields . ') VALUES ';
$first_set = true;
$sql_data = 'INSERT INTO ' . $table_name . ' (' . $fields . ') VALUES ';
$first_set = true;
$query_len = 0;
$max_len = get_usable_memory();
while ($row = mysql_fetch_row($result))
{
$values = array();
if ($first_set)
{
$sql_data .= '(';
$query = $sql_data . '(';
}
else
{
$sql_data .= ',(';
$query .= ',(';
}
for ($j = 0; $j < $fields_cnt; $j++)
@ -733,18 +745,27 @@ class mysql_extractor extends base_extractor
$values[$j] = "'" . str_replace($search, $replace, $row[$j]) . "'";
}
}
$sql_data .= implode(', ', $values) . ')';
$query .= implode(', ', $values) . ')';
$this->flush($sql_data);
$sql_data = '';
$first_set = false;
$query_len += strlen($query);
if ($query_len > $max_len)
{
$this->flush($query . ";\n\n");
$query = '';
$query_len = 0;
$first_set = true;
}
else
{
$first_set = false;
}
}
mysql_free_result($result);
if (!$first_set)
// check to make sure we have nothing left to flush
if (!$first_set && $query)
{
$this->flush(";\n\n");
$this->flush($query . ";\n\n");
}
}
}
@ -2061,6 +2082,51 @@ class firebird_extractor extends base_extractor
}
}
// get how much space we allow for a chunk of data, very similar to phpMyAdmin's way of doing things ;-) (hey, we only do this for MySQL anyway :P)
function get_usable_memory()
{
$val = trim(@ini_get('memory_limit'));
if (preg_match('/(\\d+)([mkg]?)/i', $val, $regs))
{
$memory_limit = (int) $regs[1];
switch ($regs[2])
{
case 'k':
case 'K':
$memory_limit *= 1024;
break;
case 'm':
case 'M':
$memory_limit *= 1048576;
break;
case 'g':
case 'G':
$memory_limit *= 1073741824;
break;
}
// how much memory PHP requires at the start of export (it is really a little less)
if ($memory_limit > 6100000)
{
$memory_limit -= 6100000;
}
// allow us to consume half of the total memory available
$memory_limit /= 2;
}
else
{
// set the buffer to 1M if we have no clue how much memory PHP will give us :P
$memory_limit = 1048576;
}
return $memory_limit;
}
function sanitize_data_mssql($text)
{
$data = preg_split('/[\n\t\r\b\f]/', $text);