feat: add a way to retrieve timestamp range from parquet chunk

parquet_file/src/chunk.rs

@@ -146,6 +146,12 @@ impl Chunk {
         Ok(table.path())
     }
 
+    /// Return Schema for the specified table / columns
+    pub fn timestamp_range(&self, table_name: &str) -> Result<Option<TimestampRange>> {
+        let table = self.find_table(table_name)?;
+        Ok(table.timestamp_range())
+    }
+
     // Return all tables of this chunk whose timestamp overlaps with the give one
     pub fn table_names(
         &self,

parquet_file/src/table.rs

@@ -96,6 +96,11 @@ impl Table {
         })
     }
 
+    /// Return timestamp range of this table
+    pub fn timestamp_range(&self) -> Option<TimestampRange> {
+        self.timestamp_range
+    }
+
     // Check if 2 time ranges overlap
     pub fn matches_predicate(&self, timestamp_range: &Option<TimestampRange>) -> bool {
         match (self.timestamp_range, timestamp_range) {