Expose type modifier in Column struct

Author: SergeiPatiakin

tokio-postgres/src/prepare.rs

@@ -99,6 +99,7 @@ pub async fn prepare(
                 name: field.name().to_string(),
                 table_oid: Some(field.table_oid()).filter(|n| *n != 0),
                 column_id: Some(field.column_id()).filter(|n| *n != 0),
+                type_modifier: field.type_modifier(),
                 r#type: type_,
             };
             columns.push(column);

tokio-postgres/src/statement.rs

@@ -67,6 +67,7 @@ pub struct Column {
     pub(crate) name: String,
     pub(crate) table_oid: Option<u32>,
     pub(crate) column_id: Option<i16>,
+    pub(crate) type_modifier: i32,
     pub(crate) r#type: Type,
 }
 
@@ -86,6 +87,11 @@ impl Column {
         self.column_id
     }
 
+    /// Return the type modifier
+    pub fn type_modifier(&self) -> i32 {
+        self.type_modifier
+    }
+
     /// Returns the type of the column.
     pub fn type_(&self) -> &Type {
         &self.r#type