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N°1420 - Performances enhancement

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SVN:trunk[5833]
This commit is contained in:
Eric Espié
2018-06-07 15:06:38 +00:00
parent 5b2f32c08a
commit 70a0a3c52e
14 changed files with 300 additions and 113 deletions
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22
core/sqlunionquery.class.inc.php
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@@ -103,29 +103,33 @@ class SQLUnionQuery extends SQLQuery
// Render SELECTS without orderby/limit/count
$aSelects[] = $oSQLQuery->RenderSelect(array(), $aArgs, 0, 0, false, $bBeautifulQuery);
}
$sSelects = '('.implode(")$sLineSep UNION$sLineSep(", $aSelects).')';
if ($iLimitCount > 0)
{
$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
}
else
{
$sLimit = '';
}
if ($bGetCount)
{
$sSelects = '('.implode(" $sLimit)$sLineSep UNION$sLineSep(", $aSelects)." $sLimit)";
$sFrom = "($sLineSep$sSelects$sLineSep) as __selects__";
$sSQL = "SELECT$sLineSep COUNT(*) AS COUNT$sLineSep FROM $sFrom$sLineSep";
$sSQL = "SELECT COUNT(*) AS COUNT FROM (SELECT$sLineSep 1 $sLineSep FROM $sFrom$sLineSep) AS _union_tatooine_";
}
else
{
$sOrderBy = $this->aQueries[0]->RenderOrderByClause($aOrderBy);
if (!empty($sOrderBy))
{
$sOrderBy = "ORDER BY $sOrderBy$sLineSep";
}
if ($iLimitCount > 0)
{
$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
$sOrderBy = "ORDER BY $sOrderBy$sLineSep $sLimit";
$sSQL = '('.implode(")$sLineSep UNION$sLineSep (", $aSelects).')'.$sLineSep.$sOrderBy;
}
else
{
$sLimit = '';
$sSQL = '('.implode(" $sLimit)$sLineSep UNION$sLineSep (", $aSelects)." $sLimit)";
}
$sSQL = $sSelects.$sLineSep.$sOrderBy.' '.$sLimit;
}
return $sSQL;
}