diff --git a/src/db/PDOConnection.php b/src/db/PDOConnection.php
index 1748d2085648dda4e6592b468834324d97954c46..ae431f6bd5e874a739638392e916ac5aca6a459e 100644
--- a/src/db/PDOConnection.php
+++ b/src/db/PDOConnection.php
@@ -1307,7 +1307,7 @@ abstract class PDOConnection extends Connection
                 if (PDO::PARAM_INT == $val[1] && '' === $val[0]) {
                     $val[0] = 0;
                 } elseif (self::PARAM_FLOAT == $val[1]) {
-                    $val[0] = is_string($val[0]) ? (float) $val[0] : $val[0];
+                    $val[0] = (is_string($val[0]) && !preg_match("/^\d+(\.\d+)?$/", $val[0]))  ? (float) $val[0] : $val[0];
                     $val[1] = PDO::PARAM_STR;
                 }