fix(duckdb): Allow escape strings similar to Postgres (#4497)

Author: VaggelisD

sqlglot/dialects/duckdb.py

@@ -297,6 +297,7 @@ def to_json_path(self, path: t.Optional[exp.Expression]) -> t.Optional[exp.Expre
         return super().to_json_path(path)
 
     class Tokenizer(tokens.Tokenizer):
+        BYTE_STRINGS = [("e'", "'"), ("E'", "'")]
         HEREDOC_STRINGS = ["$"]
 
         HEREDOC_TAG_IS_IDENTIFIER = True

tests/dialects/test_duckdb.py

@@ -899,6 +899,16 @@ def test_duckdb(self):
             "NOT a ILIKE b",
         )
 
+        self.validate_all(
+            "SELECT e'Hello\nworld'",
+            read={
+                "duckdb": "SELECT E'Hello\nworld'",
+            },
+            write={
+                "duckdb": "SELECT e'Hello\nworld'",
+            },
+        )
+
     def test_array_index(self):
         with self.assertLogs(helper_logger) as cm:
             self.validate_all(