Minor improvements

admin/provisioner/clickhousestatic/provisioner.go

@@ -223,7 +223,7 @@ func (p *Provisioner) pingWithResourceDSN(ctx context.Context, dsn string) error
 
 	_, err = db.ExecContext(ctx, "SELECT 1")
 	if err != nil {
-		return fmt.Errorf("failed to execute query on tenant: %w", err)
+		return fmt.Errorf("failed to execute query: %w", err)
 	}
 
 	return nil

runtime/queries/column_numeric_histogram.go

@@ -149,6 +149,11 @@ func (q *ColumnNumericHistogram) calculateFDMethod(ctx context.Context, rt *runt
 		return fmt.Errorf("not available for dialect %q", olap.Dialect())
 	}
 
+	if olap.Dialect() == drivers.DialectClickHouse {
+		// Returning early with empty results because this query tends to hang on ClickHouse.
+		return nil
+	}
+
 	minVal, maxVal, rng, err := getMinMaxRange(ctx, olap, q.ColumnName, q.Database, q.DatabaseSchema, q.TableName, priority)
 	if err != nil {
 		return err
@@ -267,6 +272,11 @@ func (q *ColumnNumericHistogram) calculateDiagnosticMethod(ctx context.Context,
 		return fmt.Errorf("not available for dialect '%s'", olap.Dialect())
 	}
 
+	if olap.Dialect() == drivers.DialectClickHouse {
+		// Returning early with empty results because this query tends to hang on ClickHouse.
+		return nil
+	}
+
 	minVal, maxVal, rng, err := getMinMaxRange(ctx, olap, q.ColumnName, q.Database, q.DatabaseSchema, q.TableName, priority)
 	if err != nil {
 		return err

runtime/queries/column_rug_histogram.go

@@ -64,6 +64,11 @@ func (q *ColumnRugHistogram) Resolve(ctx context.Context, rt *runtime.Runtime, i
 		return fmt.Errorf("not available for dialect '%s'", olap.Dialect())
 	}
 
+	if olap.Dialect() == drivers.DialectClickHouse {
+		// Returning early with empty results because this query tends to hang on ClickHouse.
+		return nil
+	}
+
 	minVal, maxVal, rng, err := getMinMaxRange(ctx, olap, q.ColumnName, q.Database, q.DatabaseSchema, q.TableName, priority)
 	if err != nil {
 		return err