Spark: enable SQL pipe operator (|>) (apache#2358)

Co-authored-by: Ifeanyi Ubah <ify1992@yahoo.com>

Author: moshap-firebolt

src/dialect/spark.rs

@@ -116,6 +116,13 @@ impl Dialect for SparkSqlDialect {
         true
     }
 
+    /// See:
+    /// - <https://spark.apache.org/docs/latest/sql-pipe-syntax.html>
+    /// - <https://issues.apache.org/jira/browse/SPARK-49528>
+    fn supports_pipe_operator(&self) -> bool {
+        true
+    }
+
     /// Parse the `DIV` keyword as integer division.
     ///
     /// Example: `SELECT 10 DIV 3` returns `3`.

tests/sqlparser_spark.rs

@@ -327,3 +327,8 @@ fn test_substring() {
         "SELECT SUBSTRING(s, 1, 3) FROM t",
     );
 }
+
+#[test]
+fn test_pipe_operator() {
+    spark().verified_stmt("SELECT * FROM t |> WHERE x > 1 |> SELECT x AS y |> ORDER BY y");
+}