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#5562

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major speed boost for Oracle :D

This took a while, every call to sql_query_limit() was checked out for having any implicit/explicit column issues... Hopefully, nothing has changed :D


git-svn-id: file:///svn/phpbb/trunk@6631 89ea8834-ac86-4346-8a33-228a782c2dd0
This commit is contained in:
David M
2006-11-22 01:22:13 +00:00
parent 6cb0276788
commit 1551f13bb2
4 changed files with 4 additions and 50 deletions
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46
phpBB/includes/db/oracle.php
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@@ -219,52 +219,6 @@ class dbal_oracle extends dbal
{
$this->query_result = false;
// Any implicit columns exist?
if (strpos($query, '.*') !== false)
{
// This sucker does a few things for us. It grabs all the explicitly named columns and what tables are being used
preg_match('/SELECT (?:DISTINCT )?(.*?)FROM(.*?)(?:WHERE|(ORDER|GROUP) BY|$)/s', $query, $tables);
// The prefixes of the explicit columns don't matter, they simply get in the way
preg_match_all('/\.(\w+)/', trim($tables[1]), $columns);
// Flip lets us do an easy isset() call
$columns = array_flip($columns[1]);
$table_data = trim($tables[2]);
// Grab the implicitly named columns, they need expanding...
preg_match_all('/(\w)\.\*/', $query, $info);
$cols = array();
foreach ($info[1] as $table_alias)
{
// We need to get the name of the aliased table
preg_match('/(\w+) ' . $table_alias . '/', $table_data, $table_name);
$table_name = $table_name[1];
$sql = "SELECT column_name
FROM all_tab_cols
WHERE table_name = '" . strtoupper($table_name) . "'";
$result = $this->sql_query($sql);
while ($row = $this->sql_fetchrow($result))
{
if (!isset($columns[strtolower($row['column_name'])]))
{
$cols[] = $table_alias . '.' . strtolower($row['column_name']);
}
}
$this->sql_freeresult($result);
// Remove the implicity .* with it's full expansion
$query = str_replace($table_alias . '.*', implode(', ', $cols), $query);
unset($cols);
}
}
$query = 'SELECT * FROM (SELECT /*+ FIRST_ROWS */ rownum AS xrownum, a.* FROM (' . $query . ') a WHERE rownum <= ' . ($offset + $total) . ') WHERE xrownum >= ' . $offset;
return $this->sql_query($query, $cache_ttl);