diff --git a/crates/gitql-ast/src/expression.rs b/crates/gitql-ast/src/expression.rs
index d65c170..3d29a75 100644
--- a/crates/gitql-ast/src/expression.rs
+++ b/crates/gitql-ast/src/expression.rs
@@ -347,8 +347,8 @@ impl Expression for ContainsExpression {
         ExpressionKind::Contains
     }
 
-    fn expr_type(&self, scope: &Environment) -> DataType {
-        self.element.expr_type(scope)
+    fn expr_type(&self, _scope: &Environment) -> DataType {
+        DataType::Boolean
     }
 
     fn as_any(&self) -> &dyn Any {
diff --git a/crates/gitql-std/src/range/mod.rs b/crates/gitql-std/src/range/mod.rs
index 61a4acd..aaebb85 100644
--- a/crates/gitql-std/src/range/mod.rs
+++ b/crates/gitql-std/src/range/mod.rs
@@ -9,6 +9,7 @@ use std::collections::HashMap;
 pub fn register_std_range_functions(map: &mut HashMap<&'static str, Function>) {
     map.insert("int4range", int4range);
     map.insert("daterange", daterange);
+    map.insert("tsrange", tsrange);
 }
 
 #[inline(always)]
@@ -27,6 +28,13 @@ pub fn register_std_range_function_signatures(map: &mut HashMap<&'static str, Si
             return_type: DataType::Range(Box::new(DataType::Date)),
         },
     );
+    map.insert(
+        "tsrange",
+        Signature {
+            parameters: vec![DataType::DateTime, DataType::DateTime],
+            return_type: DataType::Range(Box::new(DataType::DateTime)),
+        },
+    );
 }
 
 pub fn int4range(inputs: &[Value]) -> Value {
@@ -44,3 +52,11 @@ pub fn daterange(inputs: &[Value]) -> Value {
         Box::new(inputs[1].clone()),
     )
 }
+
+pub fn tsrange(inputs: &[Value]) -> Value {
+    Value::Range(
+        DataType::DateTime,
+        Box::new(inputs[0].clone()),
+        Box::new(inputs[1].clone()),
+    )
+}
diff --git a/docs/functions/range.md b/docs/functions/range.md
index 0bb3814..517e49e 100644
--- a/docs/functions/range.md
+++ b/docs/functions/range.md
@@ -6,6 +6,8 @@
 
 ### Range functions
 
-| Name      | Parameters       | Return         | Description                                        |
-| --------- | ---------------- | -------------- | -------------------------------------------------- |
-| int4range | Integer, Integer | Range(Integer) | Create a Range of integer type with start and end. |
\ No newline at end of file
+| Name      | Parameters         | Return          | Description                                          |
+| --------- | ------------------ | --------------- | ---------------------------------------------------- |
+| INT4RANGE | Integer, Integer   | Range(Integer)  | Create a Range of integer type with start and end.   |
+| DATERANGE | Date, Date         | Range(Date)     | Create a Range of date type with start and end.      |
+| TSRANGE   | DateTime, DateTime | Range(DateTime) | Create a Range of date time type with start and end. |
\ No newline at end of file
diff --git a/docs/structure/tables.md b/docs/structure/tables.md
index bc5d1c3..e02231c 100644
--- a/docs/structure/tables.md
+++ b/docs/structure/tables.md
@@ -22,18 +22,18 @@ show tables
 
 ---
 
-| Name            | Type    | Description              |
-| --------------- | ------- | ------------------------ |
-| commit_id       | Text    | Commit id                |
-| title           | Text    | Commit title             |
-| message         | Text    | Commit full message      |
-| author_name     | Text    | Author name              |
-| author_email    | Text    | Author email             |
-| committer_name  | Text    | Committer name           |
-| committer_email | Text    | Committer email          |
-| parents_count   | Integer | Number of commit parents |
-| datetime        | Date    | Commit date time         |
-| repo            | Text    | Repository full path     |
+| Name            | Type     | Description              |
+| --------------- | -------- | ------------------------ |
+| commit_id       | Text     | Commit id                |
+| title           | Text     | Commit title             |
+| message         | Text     | Commit full message      |
+| author_name     | Text     | Author name              |
+| author_email    | Text     | Author email             |
+| committer_name  | Text     | Committer name           |
+| committer_email | Text     | Committer email          |
+| parents_count   | Integer  | Number of commit parents |
+| datetime        | DateTime | Commit date time         |
+| repo            | Text     | Repository full path     |
 
 ---