From f642dd573cbf700b8591eeb9e1f6bf3ed8f98659 Mon Sep 17 00:00:00 2001
From: Ryan Schneider <ryanleeschneider@gmail.com>
Date: Tue, 16 Sep 2025 11:25:24 -0700
Subject: [PATCH] DuckDB: Allow quoted date parts in EXTRACT (#2030)

---
 src/dialect/duckdb.rs     | 5 +++++
 tests/sqlparser_duckdb.rs | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/src/dialect/duckdb.rs b/src/dialect/duckdb.rs
index 37cf7d36..f08d827b 100644
--- a/src/dialect/duckdb.rs
+++ b/src/dialect/duckdb.rs
@@ -70,6 +70,11 @@ impl Dialect for DuckDbDialect {
         true
     }
 
+    /// Returns true if this dialect allows the `EXTRACT` function to use single quotes in the part being extracted.
+    fn allow_extract_single_quotes(&self) -> bool {
+        true
+    }
+
     // DuckDB is compatible with PostgreSQL syntax for this statement,
     // although not all features may be implemented.
     fn supports_explain_with_utility_options(&self) -> bool {
diff --git a/tests/sqlparser_duckdb.rs b/tests/sqlparser_duckdb.rs
index 5bad7336..0f805195 100644
--- a/tests/sqlparser_duckdb.rs
+++ b/tests/sqlparser_duckdb.rs
@@ -869,3 +869,9 @@ fn test_duckdb_trim() {
         duckdb().parse_sql_statements(error_sql).unwrap_err()
     );
 }
+
+#[test]
+fn parse_extract_single_quotes() {
+    let sql = "SELECT EXTRACT('month' FROM my_timestamp) FROM my_table";
+    duckdb().verified_stmt(sql);
+}