Merging upstream version 6.2.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

sqlglot/dialects/dialect.py

@@ -27,6 +27,7 @@ class Dialects(str, Enum):
     STARROCKS = "starrocks"
     TABLEAU = "tableau"
     TRINO = "trino"
+    TSQL = "tsql"
 
 
 class _Dialect(type):
@@ -53,7 +54,6 @@ class _Dialect(type):
         klass.parser_class = getattr(klass, "Parser", Parser)
         klass.generator_class = getattr(klass, "Generator", Generator)
 
-        klass.tokenizer = klass.tokenizer_class()
         klass.quote_start, klass.quote_end = list(klass.tokenizer_class._QUOTES.items())[0]
         klass.identifier_start, klass.identifier_end = list(klass.tokenizer_class._IDENTIFIERS.items())[0]
 
@@ -95,7 +95,6 @@ class Dialect(metaclass=_Dialect):
     tokenizer_class = None
     parser_class = None
     generator_class = None
-    tokenizer = None
 
     @classmethod
     def get_or_raise(cls, dialect):
@@ -138,6 +137,12 @@ class Dialect(metaclass=_Dialect):
     def transpile(self, code, **opts):
         return self.generate(self.parse(code), **opts)
 
+    @property
+    def tokenizer(self):
+        if not hasattr(self, "_tokenizer"):
+            self._tokenizer = self.tokenizer_class()
+        return self._tokenizer
+
     def parser(self, **opts):
         return self.parser_class(
             **{
@@ -170,7 +175,15 @@ class Dialect(metaclass=_Dialect):
 
 
 def rename_func(name):
-    return lambda self, expression: f"{name}({csv(*[self.sql(e) for e in expression.args.values()])})"
+    def _rename(self, expression):
+        args = (
+            self.expressions(expression, flat=True)
+            if isinstance(expression, exp.Func) and expression.is_var_len_args
+            else csv(*[self.sql(e) for e in expression.args.values()])
+        )
+        return f"{name}({args})"
+
+    return _rename
 
 
 def approx_count_distinct_sql(self, expression):