fix: parsing JsonOperator (#913)

tests/sqlparser_common.rs

@@ -1113,6 +1113,41 @@ fn parse_unary_math_with_multiply() {
     );
 }
 
+fn pg_and_generic() -> TestedDialects {
+    TestedDialects {
+        dialects: vec![Box::new(PostgreSqlDialect {}), Box::new(GenericDialect {})],
+        options: None,
+    }
+}
+
+#[test]
+fn parse_json_ops_without_colon() {
+    use self::JsonOperator;
+    let binary_ops = &[
+        ("->", JsonOperator::Arrow, all_dialects()),
+        ("->>", JsonOperator::LongArrow, all_dialects()),
+        ("#>", JsonOperator::HashArrow, pg_and_generic()),
+        ("#>>", JsonOperator::HashLongArrow, pg_and_generic()),
+        ("@>", JsonOperator::AtArrow, all_dialects()),
+        ("<@", JsonOperator::ArrowAt, all_dialects()),
+        ("#-", JsonOperator::HashMinus, pg_and_generic()),
+        ("@?", JsonOperator::AtQuestion, all_dialects()),
+        ("@@", JsonOperator::AtAt, all_dialects()),
+    ];
+
+    for (str_op, op, dialects) in binary_ops {
+        let select = dialects.verified_only_select(&format!("SELECT a {} b", &str_op));
+        assert_eq!(
+            SelectItem::UnnamedExpr(Expr::JsonAccess {
+                left: Box::new(Expr::Identifier(Ident::new("a"))),
+                operator: *op,
+                right: Box::new(Expr::Identifier(Ident::new("b"))),
+            }),
+            select.projection[0]
+        );
+    }
+}
+
 #[test]
 fn parse_is_null() {
     use self::Expr::*;