feat: support DESC SEMANTIC VIEW (#5452)

* feat: support DESC SEMANTIC VIEW

* Support arrow

* Remove duplicate test and ->> hack

Author: betodealmeida

sqlglot/dialects/snowflake.py

@@ -1139,6 +1139,7 @@ class Tokenizer(tokens.Tokenizer):
             "REMOVE": TokenType.COMMAND,
             "RM": TokenType.COMMAND,
             "SAMPLE": TokenType.TABLE_SAMPLE,
+            "SEMANTIC VIEW": TokenType.SEMANTIC_VIEW,
             "SQL_DOUBLE": TokenType.DOUBLE,
             "SQL_VARCHAR": TokenType.VARCHAR,
             "STORAGE INTEGRATION": TokenType.STORAGE_INTEGRATION,

sqlglot/parser.py

@@ -451,6 +451,7 @@ class Parser(metaclass=_Parser):
         TokenType.MODEL,
         TokenType.NAMESPACE,
         TokenType.SCHEMA,
+        TokenType.SEMANTIC_VIEW,
         TokenType.SEQUENCE,
         TokenType.SINK,
         TokenType.SOURCE,

sqlglot/tokens.py

@@ -412,6 +412,7 @@ class TokenType(AutoName):
     USING = auto()
     VALUES = auto()
     VIEW = auto()
+    SEMANTIC_VIEW = auto()
     VOLATILE = auto()
     WHEN = auto()
     WHERE = auto()

tests/dialects/test_snowflake.py

@@ -2167,6 +2167,12 @@ def test_describe_table(self):
                 "spark": "DESCRIBE db.table",
             },
         )
+        self.validate_all(
+            "DESC SEMANTIC VIEW TPCDS_SEMANTIC_VIEW_SM",
+            write={
+                "snowflake": "DESCRIBE SEMANTIC VIEW TPCDS_SEMANTIC_VIEW_SM",
+            },
+        )
         self.validate_all(
             "ENDSWITH('abc', 'c')",
             read={