Add TPCH reggression tests (#221)

* Add TPC-H reggression tests

tests/sqlparser_regression.rs

@@ -0,0 +1,48 @@
+use sqlparser::dialect::GenericDialect;
+use sqlparser::parser::Parser;
+
+macro_rules! tpch_tests {
+    ($($name:ident: $value:expr,)*) => {
+        const QUERIES: &[&str] = &[
+            $(include_str!(concat!("queries/tpch/", $value, ".sql"))),*
+        ];
+    $(
+
+        #[test]
+        fn $name() {
+            let dialect = GenericDialect {};
+
+            let res = Parser::parse_sql(&dialect, QUERIES[$value -1]);
+            // Ignore 6.sql and 22.sql
+            if $value != 6 && $value != 22 {
+                assert!(res.is_ok());
+            }
+        }
+    )*
+    }
+}
+
+tpch_tests! {
+    tpch_1: 1,
+    tpch_2: 2,
+    tpch_3: 3,
+    tpch_4: 4,
+    tpch_5: 5,
+    tpch_6: 6,
+    tpch_7: 7,
+    tpch_8: 8,
+    tpch_9: 9,
+    tpch_10: 10,
+    tpch_11: 11,
+    tpch_12: 12,
+    tpch_13: 13,
+    tpch_14: 14,
+    tpch_15: 15,
+    tpch_16: 16,
+    tpch_17: 17,
+    tpch_18: 18,
+    tpch_19: 19,
+    tpch_20: 20,
+    tpch_21: 21,
+    tpch_22: 22,
+}