chore: add u64 for EqualValue and set expr is true when filter is empty (#6731)

* chore: add u64 for EqualValue and set expr is true when filter is empty

* Update src/log-query/src/log_query.rs

Co-authored-by: Yingwen <realevenyag@gmail.com>

* chore: update EqualValue Uinit to UInt

---------

Co-authored-by: Yingwen <realevenyag@gmail.com>

src/log-query/src/log_query.rs

@@ -336,6 +336,8 @@ pub enum EqualValue {
     Boolean(bool),
     /// Exact match with a number value.
     Int(i64),
+    /// Exact match with an unsigned integer value.
+    UInt(u64),
     /// Exact match with a float value.
     Float(f64),
 }
@@ -364,6 +366,12 @@ impl From<f64> for EqualValue {
     }
 }
 
+impl From<u64> for EqualValue {
+    fn from(value: u64) -> Self {
+        EqualValue::UInt(value)
+    }
+}
+
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub enum ContentFilter {
     // Search-based filters

src/query/src/log_query/planner.rs

@@ -201,7 +201,7 @@ impl LogQueryPlanner {
             .try_collect::<Vec<_>>()?;
 
         if filter_exprs.is_empty() {
-            return Ok(None);
+            return Ok(Some(col_expr.is_true()));
         }
 
         // Combine all filters with AND logic
@@ -475,6 +475,7 @@ impl LogQueryPlanner {
             EqualValue::Float(n) => lit(ScalarValue::Float64(Some(n))),
             EqualValue::Int(n) => lit(ScalarValue::Int64(Some(n))),
             EqualValue::Boolean(b) => lit(ScalarValue::Boolean(Some(b))),
+            EqualValue::UInt(n) => lit(ScalarValue::UInt64(Some(n))),
         }
     }