fix extract

Signed-off-by: Themis Valtinos <73662635+themisvaltinos@users.noreply.github.com>

Author: themisvaltinos

sqlmesh/utils/jinja.py

@@ -79,6 +79,11 @@ def extract(self, jinja: str, dialect: str = "") -> t.Dict[str, MacroInfo]:
         self.reset()
         self.sql = jinja
         self._tokens = Dialect.get_or_raise(dialect).tokenize(jinja)
+
+        # guard for older sqlglot versions (before 30.0.3)
+        if hasattr(self, "_tokens_size"):
+            # keep the cached length in sync
+            self._tokens_size = len(self._tokens)
         self._index = -1
         self._advance()