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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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23
core/sqlobjectquery.class.inc.php
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@@ -339,6 +339,14 @@ class SQLObjectQuery extends SQLQuery
$this->PrepareRendering();
$sFrom = self::ClauseFrom($this->__aFrom, $sIndent);
$sWhere = self::ClauseWhere($this->m_oConditionExpr, $aArgs);
if ($iLimitCount > 0)
{
$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
}
else
{
$sLimit = '';
}
if ($bGetCount)
{
if (count($this->__aSelectedIdFields) > 0)
@@ -349,11 +357,13 @@ class SQLObjectQuery extends SQLQuery
$aCountFields[] = "COALESCE($sFieldExpr, 0)"; // Null values are excluded from the count
}
$sCountFields = implode(', ', $aCountFields);
$sSQL = "SELECT$sLineSep COUNT(DISTINCT $sCountFields) AS COUNT$sLineSep FROM $sFrom$sLineSep WHERE $sWhere";
// Count can be limited for performance reason, in this case the total amount is not important,
// we only need to know if the number of entries is greater than a certain amount.
$sSQL = "SELECT COUNT(*) AS COUNT FROM (SELECT$sLineSep DISTINCT $sCountFields $sLineSep FROM $sFrom$sLineSep WHERE $sWhere $sLimit) AS _tatooine_";
}
else
{
$sSQL = "SELECT$sLineSep COUNT(*) AS COUNT$sLineSep FROM $sFrom$sLineSep WHERE $sWhere";
$sSQL = "SELECT COUNT(*) AS COUNT FROM (SELECT$sLineSep 1 $sLineSep FROM $sFrom$sLineSep WHERE $sWhere $sLimit) AS _tatooine_";
}
}
else
@@ -364,14 +374,7 @@ class SQLObjectQuery extends SQLQuery
{
$sOrderBy = "ORDER BY $sOrderBy$sLineSep";
}
if ($iLimitCount > 0)
{
$sLimit = 'LIMIT '.$iLimitStart.', '.$iLimitCount;
}
else
{
$sLimit = '';
}
$sSQL = "SELECT$sLineSep DISTINCT $sSelect$sLineSep FROM $sFrom$sLineSep WHERE $sWhere$sLineSep $sOrderBy $sLimit";
}
return $sSQL;