Add support for Databricks TIMESTAMP_NTZ. (#1781)

Co-authored-by: Roman Borschel <roman@cluvio.com>

src/ast/data_type.rs

@@ -312,6 +312,10 @@ pub enum DataType {
     ///
     /// [1]: https://jakewheat.github.io/sql-overview/sql-2016-foundation-grammar.html#datetime-type
     Timestamp(Option<u64>, TimezoneInfo),
+    /// Databricks timestamp without time zone. See [1].
+    ///
+    /// [1]: https://docs.databricks.com/aws/en/sql/language-manual/data-types/timestamp-ntz-type
+    TimestampNtz,
     /// Interval
     Interval,
     /// JSON type
@@ -567,6 +571,7 @@ impl fmt::Display for DataType {
             DataType::Timestamp(precision, timezone_info) => {
                 format_datetime_precision_and_tz(f, "TIMESTAMP", precision, timezone_info)
             }
+            DataType::TimestampNtz => write!(f, "TIMESTAMP_NTZ"),
             DataType::Datetime64(precision, timezone) => {
                 format_clickhouse_datetime_precision_and_timezone(
                     f,

src/keywords.rs

@@ -875,6 +875,7 @@ define_keywords!(
     TIME,
     TIMESTAMP,
     TIMESTAMPTZ,
+    TIMESTAMP_NTZ,
     TIMETZ,
     TIMEZONE,
     TIMEZONE_ABBR,

src/parser/mod.rs

@@ -9247,6 +9247,7 @@ impl<'a> Parser<'a> {
                     self.parse_optional_precision()?,
                     TimezoneInfo::Tz,
                 )),
+                Keyword::TIMESTAMP_NTZ => Ok(DataType::TimestampNtz),
                 Keyword::TIME => {
                     let precision = self.parse_optional_precision()?;
                     let tz = if self.parse_keyword(Keyword::WITH) {

tests/sqlparser_databricks.rs

@@ -317,3 +317,43 @@ fn parse_databricks_struct_function() {
         })
     );
 }
+
+#[test]
+fn data_type_timestamp_ntz() {
+    // Literal
+    assert_eq!(
+        databricks().verified_expr("TIMESTAMP_NTZ '2025-03-29T18:52:00'"),
+        Expr::TypedString {
+            data_type: DataType::TimestampNtz,
+            value: Value::SingleQuotedString("2025-03-29T18:52:00".to_owned())
+        }
+    );
+
+    // Cast
+    assert_eq!(
+        databricks().verified_expr("(created_at)::TIMESTAMP_NTZ"),
+        Expr::Cast {
+            kind: CastKind::DoubleColon,
+            expr: Box::new(Expr::Nested(Box::new(Expr::Identifier(
+                "created_at".into()
+            )))),
+            data_type: DataType::TimestampNtz,
+            format: None
+        }
+    );
+
+    // Column definition
+    match databricks().verified_stmt("CREATE TABLE foo (x TIMESTAMP_NTZ)") {
+        Statement::CreateTable(CreateTable { columns, .. }) => {
+            assert_eq!(
+                columns,
+                vec![ColumnDef {
+                    name: "x".into(),
+                    data_type: DataType::TimestampNtz,
+                    options: vec![],
+                }]
+            );
+        }
+        s => panic!("Unexpected statement: {:?}", s),
+    }
+}