feat: initial Dremio sqlglot dialect (#33847)

superset/sql/dialects/dremio.py

@@ -0,0 +1,46 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+from sqlglot import exp, generator, parser
+from sqlglot.dialects.dialect import Dialect, rename_func
+
+
+class DremioRegexpSplit(exp.Func):
+    """
+    Custom REGEXP_SPLIT function for Dremio that supports 4 arguments.
+    """
+
+    arg_types = {
+        "this": True,  # string to split
+        "expression": True,  # delimiter pattern
+        "mode": True,  # mode (like 'ALL') - required in Dremio
+        "limit": True,  # limit - required in Dremio
+    }
+
+
+class Dremio(Dialect):
+    class Parser(parser.Parser):
+        FUNCTIONS = {
+            **parser.Parser.FUNCTIONS,
+            "REGEXP_SPLIT": DremioRegexpSplit.from_arg_list,
+        }
+
+    class Generator(generator.Generator):
+        TRANSFORMS = {
+            **generator.Generator.TRANSFORMS,
+            DremioRegexpSplit: rename_func("REGEXP_SPLIT"),
+        }