Fix iLike() falsely turning escaped % and _ into wildcards

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/private/DB/QueryBuilder/ExpressionBuilder/OCIExpressionBuilder.php

@@ -189,8 +189,6 @@ class OCIExpressionBuilder extends ExpressionBuilder {
 	 * @inheritdoc
 	 */
 	public function iLike($x, $y, $type = null) {
-		$x = $this->helper->quoteColumnName($x);
-		$y = $this->helper->quoteColumnName($y);
-		return new QueryFunction('REGEXP_LIKE(' . $x . ', \'^\' || REPLACE(REPLACE(' . $y . ', \'%\', \'.*\'), \'_\', \'.\') || \'$\', \'i\')');
+		return $this->like($this->functionBuilder->lower($x), $this->functionBuilder->lower($y));
 	}
 }