diff --git a/oximeter/db/src/lib.rs b/oximeter/db/src/lib.rs
index f632a531af..24f7d8c2d0 100644
--- a/oximeter/db/src/lib.rs
+++ b/oximeter/db/src/lib.rs
@@ -281,31 +281,8 @@ mod tests {
     use super::*;
     use crate::model::DbFieldList;
     use crate::model::DbTimeseriesSchema;
-    use std::convert::TryFrom;
     use uuid::Uuid;
 
-    #[test]
-    fn test_timeseries_name() {
-        let name = TimeseriesName::try_from("foo:bar").unwrap();
-        assert_eq!(format!("{}", name), "foo:bar");
-    }
-
-    #[test]
-    fn test_timeseries_name_from_str() {
-        assert!(TimeseriesName::try_from("a:b").is_ok());
-        assert!(TimeseriesName::try_from("a_a:b_b").is_ok());
-        assert!(TimeseriesName::try_from("a0:b0").is_ok());
-        assert!(TimeseriesName::try_from("a_0:b_0").is_ok());
-
-        assert!(TimeseriesName::try_from("_:b").is_err());
-        assert!(TimeseriesName::try_from("a_:b").is_err());
-        assert!(TimeseriesName::try_from("0:b").is_err());
-        assert!(TimeseriesName::try_from(":b").is_err());
-        assert!(TimeseriesName::try_from("a:").is_err());
-        assert!(TimeseriesName::try_from("123").is_err());
-        assert!(TimeseriesName::try_from("no:no:no").is_err());
-    }
-
     // Validates that the timeseries_key stability for a sample is stable.
     #[test]
     fn test_timeseries_key_sample_stability() {
diff --git a/oximeter/db/src/sql/mod.rs b/oximeter/db/src/sql/mod.rs
index 9aea3bae55..1f84e208d2 100644
--- a/oximeter/db/src/sql/mod.rs
+++ b/oximeter/db/src/sql/mod.rs
@@ -756,6 +756,23 @@ impl RestrictedQuery {
         }
     }
 
+    // Verify that the identifier is a single, concrete timeseries name.
+    fn extract_timeseries_name(
+        from: &[Ident],
+    ) -> Result<IndexSet<TimeseriesName>, OxdbError> {
+        if from.len() != 1 {
+            return unsupported!(
+                "Query must select from single named \
+                timeseries, with no database"
+            );
+        }
+        from[0]
+            .value
+            .parse()
+            .map(|n| indexmap::indexset! { n })
+            .map_err(|_| MetricsError::InvalidTimeseriesName.into())
+    }
+
     // Process a single "table factor", the <object> in `FROM <object>` to
     // extract the names of the timeseries it refers to.
     //
@@ -770,17 +787,7 @@ impl RestrictedQuery {
                         "Table functions and hints are not supported"
                     );
                 }
-                if name.0.len() != 1 {
-                    return unsupported!(
-                        "Query must select from single named \
-                        table, with no database"
-                    );
-                }
-                let timeseries_name = name.0[0]
-                    .value
-                    .parse()
-                    .map(|n| indexmap::indexset! { n })
-                    .map_err(|_| MetricsError::InvalidTimeseriesName)?;
+                let timeseries_name = Self::extract_timeseries_name(&name.0)?;
                 // Rewrite the quote style to be backticks, so that the
                 // resulting actual query translates into a valid identifier for
                 // ClickHouse, naming the CTE's well generate later.
diff --git a/oximeter/oximeter/src/schema.rs b/oximeter/oximeter/src/schema.rs
index b6953fda52..2a577fc8f1 100644
--- a/oximeter/oximeter/src/schema.rs
+++ b/oximeter/oximeter/src/schema.rs
@@ -261,7 +261,7 @@ impl PartialEq for TimeseriesSchema {
 //
 // That describes the target/metric name, and the timeseries is two of those, joined with ':'.
 const TIMESERIES_NAME_REGEX: &str =
-    "(([a-z]+[a-z0-9]*)(_([a-z0-9]+))*):(([a-z]+[a-z0-9]*)(_([a-z0-9]+))*)";
+    "^(([a-z]+[a-z0-9]*)(_([a-z0-9]+))*):(([a-z]+[a-z0-9]*)(_([a-z0-9]+))*)$";
 
 /// A set of timeseries schema, useful for testing changes to targets or
 /// metrics.
@@ -502,6 +502,7 @@ mod tests {
         assert!(TimeseriesName::try_from(":b").is_err());
         assert!(TimeseriesName::try_from("a:").is_err());
         assert!(TimeseriesName::try_from("123").is_err());
+        assert!(TimeseriesName::try_from("x.a:b").is_err());
     }
 
     #[derive(Target)]