1 files changed, 11 insertions, 0 deletions
diff --git a/sqlglot/dialects/bigquery.py b/sqlglot/dialects/bigquery.py
index 5bbff9d..4550d65 100644
--- a/sqlglot/dialects/bigquery.py
+++ b/sqlglot/dialects/bigquery.py
@@ -119,6 +119,8 @@ class BigQuery(Dialect):
             "UNKNOWN": TokenType.NULL,
             "WINDOW": TokenType.WINDOW,
             "NOT DETERMINISTIC": TokenType.VOLATILE,
+            "BEGIN": TokenType.COMMAND,
+            "BEGIN TRANSACTION": TokenType.BEGIN,
         }
         KEYWORDS.pop("DIV")
 
@@ -204,6 +206,15 @@ class BigQuery(Dialect):
 
         EXPLICIT_UNION = True
 
+        def transaction_sql(self, *_):
+            return "BEGIN TRANSACTION"
+
+        def commit_sql(self, *_):
+            return "COMMIT TRANSACTION"
+
+        def rollback_sql(self, *_):
+            return "ROLLBACK TRANSACTION"
+
         def in_unnest_op(self, unnest):
             return self.sql(unnest)