diff --git a/influx.py b/influx.py
index aa97fca..9f49a93 100644
--- a/influx.py
+++ b/influx.py
@@ -43,11 +43,17 @@ def negnull2none(v):
     return None if v == 0 and copysign(1, v) == -1 else v
 
 
+class RegExp(str):
+    pass
+
+
 def wildcard_filter(key, names):
     patterns = []
-    for name in names:
-        patterns.append('[^.]*'.join(re.escape(v) for v in name.split('*')))
-    pattern = '|'.join(patterns)
+    for pattern in names:
+        if isinstance(pattern, RegExp):
+            patterns.append(pattern)
+        else:
+            patterns.append('[^.]*'.join(re.escape(v) for v in pattern.split('*')))
     return f'|> filter(fn:(r) => r.{key} =~ /^({pattern})$/)'
 
 
@@ -236,7 +242,7 @@ class InfluxDBWrapper:
                 columns[key] = crit
                 continue
             if isinstance(crit, str):
-                if '*' in crit:
+                if isinstance(crit, RegExp) or '*' in crit:
                     keynames.append(key)
                     msg.append(wildcard_filter(key, [crit]))
                     continue