diff --git a/src/config.rs b/src/config.rs
index cdf891e..5612940 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -707,6 +707,7 @@ impl Intercept {
     pub fn substitute(&mut self, db: &str, user: &str) {
         for (_, query) in self.queries.iter_mut() {
             query.substitute(db, user);
+            query.query = query.query.to_ascii_lowercase();
         }
     }
 }
diff --git a/src/plugins/intercept.rs b/src/plugins/intercept.rs
index 88d24d0..8de0d71 100644
--- a/src/plugins/intercept.rs
+++ b/src/plugins/intercept.rs
@@ -36,6 +36,7 @@ pub fn setup(intercept_config: &InterceptConfig, pools: &PoolMap) {
     for (identifier, _) in pools.iter() {
         let mut intercept_config = intercept_config.clone();
         intercept_config.substitute(&identifier.db, &identifier.user);
+        debug!("Intercept config: {:?}", intercept_config);
         config.insert(identifier.clone(), intercept_config);
     }